Curator of Collection, Mollusks
Biography
Timothy Pearce is the head of the Section of Mollusks at Carnegie Museum of Natural History, where he conducts malacological research on land snails and cares for and promotes use of the huge research collection of snails and clams (1.8 million specimens). His MS in snail paleontology and his PhD in snail ecology give him a valuable perspective on how time has affected the makeup of modern snail communities.
Pearce received his PhD (1994) and MS (1991) in biology from the University of Michigan. He completed his post-doctoral work on Madagascar’s land snails at SUNY–Stony Brook from 1995–1996. He received his MA in paleontology from the University of California–Berkeley in 1988 and his BS in marine biology from Evergreen State College in 1979.
Prior to his appointment at Carnegie Museum of Natural History in 2002, he was assistant curator of Mollusks at the Delaware Museum of Natural History from 1997–2001.
Pearce’s research focuses on the ecology and systematics of mollusks, biogeographical, ecological, and behavioral studies on terrestrial gastropods and the inventory and distribution of land snails and slugs in the northeastern United States. His current research involves land snail distributions in Pennsylvania (partly funded by Pennsylvania Wild Resources Conservation Program) and other parts of the northeastern United States. He also pursues the biogeography of land snails on islands in the Great Lakes, distribution and ecology of land snails on California islands, and systematics of North American land snails.
Pearce coauthored the book Marine Mollusks of Bermuda (2009), coedited the American Malacological Society’s text The Mollusks: A Guide to Their Study, Collection, and Preservation (2006), and has published more than 45 peer-reviewed scientific papers on mollusks.
The Moon Snails Neverita duplicata and Euspira heros: Cannibal Predators of the Sea! … who also enjoy a nice algae salad
by Sabrina Spiher Robinson and Tim Pearce Imagine you’re a clam, hanging out in your cozy little hole under shallow ocean water, …The Busyconidae Whelks, Homebodies of the East Coast
by Sabrina Spiher Robinson and Tim Pearce We try not to have strong favorites among the mollusks of the world in the …Type Specimens: What are they and why are they important?
by Timothy A. Pearce and Rachel Thomas Beckel What do we mean when we say we have type specimens in the Carnegie …The Hermit Crab and the Moon Snail
by Timothy A. Pearce and Mandi Lyon When a snail needs a larger shell, it simply grows its shell larger, continuing the spiral. However, …Oysters Swim Towards a Siren Soundscape
by Sabrina Spiher Robinson “’O Oysters, come and walk with us!’ The Walrus did beseech. ‘A pleasant walk, a pleasant talk, Along …Shark-ish Beasts Versus Cephalopods: Which is Predator, Which is Prey, and is One an Artist?
by Sabrina S. Robinson and Timothy A. Pearce We’ve all heard the legend of the sperm whale and the giant squid, locked …
PEER-REVIEWED ARTICLES
Richart, C.H., Chichester, L.F., Boyer, B. & Pearce, T.A. 2019. Rediscovery of the southern California endemic American Keeled Slug Anadenulus cockerelli (Hemphill, 1890) after a 68-year hiatus. Journal of Natural History, DOI: 10.1080/00222933.2018.1447700 [17 pp.] [published on-line 2018]
Drost, C.A., Nekola, J.C., Roth, B. & Pearce, T.A. 2018. Land mollusks of the California Channel Islands: an overview of diversity, populations, and conservation status. Western North American Naturalist, 78(4): 799-810. [14 Dec 2018]
Utz, R.M., Pearce, T.A., Lewis, D.L. & Mannino, J.C. 2018. Elevated native terrestrial snail abundance and diversity in association with an invasive understory shrub, Berberis thunbergii, in a North American deciduous forest. Acta Oecologia, 86: 66-71.
Pearce, T.A. & Drescher, C.M. 2017. Terrestrial Gastropods of South Fox Island, Leelanau Co., Michigan, U.S.A. American Malacological Bulletin, 35(1): 42-50.
Pearce, T.A. & Drescher, C.M. [submitted 13 Aug 2016; accepted 6 Nov 2016; expected early 2017] Terrestrial Gastropods of South Fox Island, Leelanau Co., Michigan, U.S.A. American Malacological Bulletin.
Pearce, T.A. & Arnold, C.D. 2016. Decline of the land snail Anguispira alternata (Pulmonata: Discidae) in Pennsylvania, U.S.A. Annals of Carnegie Museum, 84(1): 9-21.
Pearce, T.A. & Fields, M.C. 2015. Shell and genital morphology fails to separate Ancotrema hybridum (Ancey, 1888) and A. sportella (Gould, 1846) (Gastropoda: Haplotrematidae). Malacologia, 59(1): 21-32.
Pearce, T.A. & Winters, R.E. 2014. New distribution records for Ventridens eutropis Pilsbry, 1946 and V. intertextus (Binney, 1841) in Tennessee, USA (Gastropoda: Gastrodontidae). Nemouria, Occasional Papers of the Delaware Museum of Natural History, (49): 1-8.
Steury, B.W. & Pearce, T.A. 2014. Land Snails and Slugs (Gastropoda: Caenogastropoda and Pulmonata) of two National Parks along the Potomac River near Washington, District of Columbia. Banisteria (43): 3-20.
Perez, K.E., Defreitas, N., Slapcinsky, J., Minton, R.L., Anderson, F.E. & Pearce, T.A. 2014. Molecular phylogeny, evolution of shell shape, and DNA barcoding in Polygyridae (Gastropoda: Pulmonata), an endemic North American clade of land snails. American Malacological Bulletin 32(1): 1-31.
Pearce, T.A. & Paustian, M.E. 2013. Are temperate land snails susceptible to climate change through reduced altitudinal ranges? A Pennsylvania example. American Malacological Bulletin 31(2): 213-224.
Pearce, T.A. & Paustian, M.E. 2013. Omphalotropis ilapiryensis, a replacement name for O. costulata Emberton and Pearce, 1999 (Gastropoda: Littorinimorpha: Assimineidae). Nautilus 127(2): 90-91.
Johnson, C.T. & Pearce, T.A. 2013. Do micro snails follow conspecific mucous trails? Experiments with Vallonia excentrica (Pulmonata: Valloniidae). American Malacological Bulletin 31(1): 51-55.
Pearce, T.A. & Sturm, C.F. 2013. Introduction to the James H. Lee symposium, “Great Unanswered Questions in Malacology,” 77th annual meeting of the American Malacological Society. American Malacological Bulletin 31(1): 105-107.
Pearce, T.A., Mulvihill, R.S. & Porter, K.A. 2012. Land slugs (Gastropoda: Pulmonata) on birds demonstrate dispersal potential. Nautilus 126(1): 38-40.
Pearce, T.A. & Porter, K.A. 2011. Do Philomycus carolinianus (Gastropoda: Philomycidae) prefer to congregate? Nautilus 125: 83-85.
Örstan, A., Sparks, J.L. & Pearce, T.A. 2011. Wayne Grimm’s legacy: A 40-year experiment on the dispersal of Cepaea nemoralis in Frederick County, Maryland. American Malacological Bulletin 29: 139-142.
Pearce, T.A., Olori, J.C. & Kemezis, K.W. 2010. Land snails from St. Elzear Cave, Gaspé Peninsula, Quebec: antiquity of Cepaea hortensis in North America. Annals of Carnegie Museum 79(1): 65-78.
Hotopp, K.P., Pearce, T.A., Nekola, J.C. & Schmidt, K. 2010. New land snail (Gastropoda: Pulmonata) distribution records for New York State. Proceedings of the Academy of Natural Sciences of Philadelphia 159: 25-30.
Muhs, D.R., Skipp, S.G., Schumann, R.R., Johnson, D.L., McGeehin, J.P., Beann, J., Freeman, J., Pearce, T.A. & Rowland, Z.M. 2009. The origin and paleoclimatic significance of carbonate sand dunes deposited on the California Channel Islands during the last glacial period. In: Damiani, C.C. & Garcelon, D.K. (eds.), Proceedings of the Seventh California Islands Symposium, Oxnard, California, February 5 – 8, 2008. Institute for Wildlife Studies, Arcata, CA. Pp. 3-14.
Welter-Schultes, F., [37 authors], Pearce, T.A., [20 authors]. 2009. Comment on the proposed Amendment of Articles of the International Code of Zoological Nomenclature to expand and refine methods of publication. Bulletin of Zoological Nomenclature 66(3): 215-219 [complete author list: Welter-Schultes, F., Eikel, O., Feuerstein, V, Hörnschemeyer, T., Klug, R., Lutze, A., Tröster, G., Wieland, F., Willmann, R., Antezana Jerez, T., Baiocchi, D., Caldara, R., Núñez Cortés, C.N., Fenzan, W.J., Fery, H., Filmer, M., Gittenberger, E., Giusti, F., González, J.H., Groh, K., Guerra, A., Hendrich, L., Jäch, M., Janssen, R., Jimenez Tenorio, M., Johanson, K.A., Kanase, A.A., Kenner, R.D., Koch, A., Lindner, N., Lorenz, F., Maehr, M.D., Manganelli, G., Martínez, S., Meregalli, M., Monteiro, A., Nielsen, S.N., Oliveira, A., Pearce, T.A., Pederzani, F., Petrov, P.N., Perez, M.P., Poppe, G.T., Richling, I., Rolán, E., Sahlmann, B., Sama, G., Savage, J.M., Smetana, A., Stuardo, J., Sturm, C., Suárez Bustabad, M., Subai, P., Szekeres, M., Trigo, J.E., Tucker, J.K., van Vondel, B.J., Watts, C., Wiese, V. & Wirth, V.]
Pearce, T.A. 2008. When a snail dies in the forest, how long will the shell persist? Effect of dissolution and micro-bioerosion. American Malacological Bulletin 26: 111-117
Pearce, T.A. & Evans, R. 2008. Freshwater Mollusca of Plummers Island, Maryland. Bulletin of the Biological Society of Washington 15(1): 20-30
Hotopp, K.P., Pearce, T.A. & Dourson, D.C. 2008. Land Snails of the Cheat River Canyon, West Virginia (Gastropoda: Pulmonata). Banisteria 31: 40-46
Allnut, T.F., Ferrier, S., Manion, G., Powell, G.V.N., Ricketts, T.H., Fisher, B.L., Harper, G.J., Kremen, C., Labat, J.-N., Lees, D.C., Pearce, T.A. & Rakotondrainibe, F. 2008. A method for quantifying biodiversity loss and its application to a 50-year record of deforestation across Madagascar. Conservation Letters 1: 173-181
Pearce, T.A., Fields, M.C. & Kurita, K. 2007. Discriminating shells of Gastrocopta pentodon (Say, 1822) and G. tappaniana (C.B. Adams, 1842) (Gastropoda: Pulmonata) with an example from the Delmarva Peninsula, eastern USA. Nautilus 121(2): 66-75
Brady, J.K. & Pearce, T.A. 2007. Terrestrial slugs in strip mined and unmined forested land, Tuscarawas County, Ohio, U.S.A. Proceedings of the Academy of Natural Sciences 156: 117-122
Örstan, A., Yildirim, M.Z., Ceylan, S., Pearce, T.A. & Welter-Schultes, F. 2007. [A new species of Idyla (Pulmonata: Clausiliidae)] from Aydin Mountains, Turkey and the associated land snail fauna. Journal of Conchology 39(3): 329-334
Örstan, A., Pearce, T.A. & Welter-Schultes, F. 2005. Land snail diversity in a threatened limestone district near Istanbul, Turkey. Animal Biodiversity and Conservation 28(2): 181-188.
Sayenko, E.M., Pearce, T.A. & Shea, E.K. 2005. Glochidial morphology of selected species of the genera Cristaria Schumacher, 1817 and Sinanodonta Modell, 1945 (Bivalvia: Unionidae) from Far Eastern Russia. American Malacological Bulletin 20:11-21.
Pearce, T.A. & Bayne, E.G. 2003. Records of the Arion hortensis species complex in Delaware and Pennsylvania, eastern United States. Veliger 46(4):362-363.
Pearce, T.A. 2003. A guardian for mollusks (Response to the article by Leonard Krishtalka regarding the mollusk collection at the Carnegie Museum of Natural History). Museum News 82(5): 7
Pearce, T.A., Prozorova, L.A. & Kuwahara, Y. 2002. Terrestrial Mollusca on the Kuril Islands: previous records and problems for study. Bulletin of the Russian Far East Malacological Society 6:89-101.
Emberton, K.C. & Pearce, T.A. 2000. Small high-spired pulmonates from Mounts Mahermana, Ilapiry, and Vasiha, southeastern Madagascar, with description of a new genus, and with conservation statuses of 15 streptaxid species. Veliger 43(2):126-135.
Emberton, K.C. & Pearce, T.A. 2000. Helicarionid snails of Mounts Mahermana, Ilapiry, and Vasiha, southeastern Madagascar. Veliger 43(3):218-247.
Emberton, K.C. & Pearce, T.A. 2000. Charopid snails of Mounts Mahermana, Ilapiry, and Vasiha, southeastern Madagascar, with description of a new genus and with conservation statuses of nine species. Veliger 43(3):248-264.
Naranjo-García, E., Polaco, O.J. & Pearce, T.A. 2000. A new genus and species of semi-slug (Pulmonata: Helicoidea) from southern Chiapas, Mexico. Archiv für Molluskenkunde 128:153-161.
Emberton, K.C. & Pearce, T.A. 1999. Land caenogastropods of Mounts Mahermana, Ilapiry, and Vasiha, southeastern Madagascar, with conservation statuses of 17 species of Boucardicus. Veliger 42(4):338-372.
Emberton, K.C., Pearce, T.A. & Randalana, R. 1999. Molluscan diversity in the unconserved Vohimena and the conserved Anosy mountain chains, southeast Madagascar. Biological Conservation 89:183-188.
Pearce, T.A. 1997. Interference and resource competition in two land snails: adults inhibit conspecific juvenile growth in field and laboratory. Journal of Molluscan Studies 63: 389-399.
Emberton, K.C., Pearce, T.A., Kasigwa, P.F., Tattersfield, P. & Habibu, Z.1997. High diversity and regional endemism in land snails of eastern Tanzania. Biodiversity and Conservation 6:1123-1136.
Emberton, K.C., Pearce, T.A. & Randalana, R. 1996. Quantitatively sampling land-snail species richness in Madagascan rainforests. Malacologia 38:203-212.
Pearce, T.A. & Gaertner, A. 1996. Optimal foraging and mucus-trail following in the snail-eating snail Haplotrema concavum (Gastropoda: Pulmonata). Malacological Review 29:85-99.
Pearce, T.A. 1994. Terrestrial gastropods of Mackinac Island, Michigan, U.S.A. Walkerana 7:47-53.
Pearce, T.A. 1993. Micrarionta (Gastropoda: Pulmonata) on San Nicolas Island, California. Evolutionary relationship among the species. Malacological Review 26:15-50.
Karowe, D.N., Pearce, T.A. & Spaller, W.R. 1993. Chemical communication in freshwater snails: Behavioral responses of Physa parkeri to mucous trails of P. parkeri (Gastropoda: Pulmonata) and Campeloma decisum (Gastropoda: Prosobranchia). Malacological Review 26:9-14.
Pearce, T.A. & Blanchard, D. 1993 [1992]. Arion hortensis s.s., an introduced slug in Michigan. Walkerana 6(16):243-244.
Pearce, T.A. 1992 [1990]. Spool and line technique for tracing field movements of terrestrial snails. Walkerana 4(12):307-316.
Pearce, T.A. 1990. Phylogenetic relationships of Micrarionta (Gastropoda: Pulmonata) and distinctness of the species on San Nicolas Island, California. Malacological Review 23:1-37.
Pearce, T.A. 1989. Loping locomotion in terrestrial gastropods. Walkerana 3(10):229-237.
Roth, B. & Pearce, T.A. 1988. “Micrarionta” dallasi, a helicinid (prosobranch), not a helminthoglyptid (pulmonate), land snail: paleoclimatic implications. Southwestern Naturalist 33(1):117-119.
Roth, B. & Pearce, T.A. 1984. Vitrea contracta (Westerlund) and other introduced land mollusks in Lynnwood, Washington. Veliger 27(1):90-92.
BOOKS
Sturm, C.F., Pearce, T.A. & Zimmerman, A. (eds.). 2011. Program and Abstracts, 77th Annual Meeting American Malacological Society, 23-27 July 2011, Pittsburgh, PA. 100 pp.
Jensen, R.H. & Pearce, T.A. 2009. Marine Mollusks of Bermuda: Checklist and Bibliography. Delaware Museum of Natural History, Wilmington, Delaware. x + 473 pp.
Sturm, C.F., Pearce, T.A. & Valdes, A., eds. 2006. The Mollusks: A Guide to Their Study, Collection, and Preservation. American Malacological Society, Special Publication 4. Universal Publishers, Inc., Boca Raton, Florida. xii + 445 pp.
Pearce, T.A. & Murphy, M.S. 2006. Identification guide to conspicuous land snails and slugs of Powdermill Nature Reserve, Westmoreland County, Pennsylvania. Published by Carnegie Museum of Natural History, Section of Mollusks and Powdermill Nature Reserve. 18 pp [unnumbered].
Gilpin, D. [author], Pearce, T.A. [content adviser] & Young, T.E., Jr., [scientific adviser]. 2006. Snails, Shellfish & Other Mollusks. Compass Point Books, Minneapolis, Minnesota. 48 pp.
BOOK CHAPTERS
Pearce, T.A. & Örstan, A. 2006. Terrestrial Gastropoda. Chapter 22, 261-285 in “Mollusks: A Guide to Their Study, Collection, and Preservation” (C.F. Sturm, T.A. Pearce, and Á. Valdés, eds.). American Malacological Society, Special Publication 4. Universal Publishers, Inc., Boca Raton, Florida. online at http://home.earthlink.net/~snailstales2/Chapter22.pdf
Pearce, T.A. 2006. Donating Amateur Collections to Museums. Chapter 14, pp 189-196 in “Mollusks: A Guide to Their Study, Collection, and Preservation” (C.F. Sturm, T.A. Pearce, and Á. Valdés, eds.). American Malacological Society, Special Publication 4. Universal Publishers, Inc., Boca Raton, Florida.
Sturm, C.F., Petit, R., Pearce, T.A., Cummings, K., Schwabe, E., & Wanniger, A. 2006. The molluscan literature. Chapter 9, pp 111-146 in “Mollusks: A Guide to Their Study, Collection, and Preservation” (C.F. Sturm, T.A. Pearce, and Á. Valdés, eds.). American Malacological Society, Special Publication 4. Universal Publishers, Inc., Boca Raton, Florida.
Sturm, C.F., Pearce, T.A. & Valdés, Á. 2006. The mollusks: introductory comments. Chapter 1, pp 1-7 in “Mollusks: A Guide to Their Study, Collection, and Preservation” (C.F. Sturm, T.A. Pearce, and Á. Valdés, eds.). American Malacological Society, Special Publication 4. Universal Publishers, Inc., Boca Raton, Florida.
Sturm, C.F. & Pearce, T.A. 2006. Glossary. Pp 441-445 in “Mollusks: A Guide to Their Study, Collection, and Preservation” (C.F. Sturm, T.A. Pearce, and Á. Valdés, eds.). American Malacological Society, Special Publication 4. Universal Publishers, Inc., Boca Raton, Florida.
Pearce, T.A. 2003. Gastropoda, Terrestrial Snails. Pp. 529-574 in “Natural History of Madagascar” (S.M. Goodman and J.P. Benstead, eds.). University of Chicago Press.
Burch, J.B. & Pearce, T.A. 1990. Terrestrial Gastropoda. Pp. 201-309 in D.L. Dindall (ed.), Soil Biology Guide. Wiley & Sons, Inc., New Jersey. 1344 pp.
BOOK REVIEW
Pearce, T.A. 1986. Review of “The distributions of the native land mollusks of the Eastern United States” by L. Hubricht, 1985. Veliger 28(4):467-468.
POPULAR & NEWSLETTER ARTICLES
Pearce, T.A., Lori Schroeder & Charles F. Sturm. 2016. Tenth Annual Meeting of Ohio (River) Valley Unified Malacologists (OVUM) 2016. Newsletter of the American Malacological Society, 47(2): 3-5.
Shea, E.K. & Pearce, T.A. 2016. Mid-Atlantic Malacologists Meeting – 2016. American Conchologist 44(2): 19-20.
Örstan, A. & Pearce, T.A. 2016. What determines long term success in assisted colonization of land snails? Insights from a 19th century experiment. Tentacle, (24): 44-45.
Pearce, T.A. & Sturm, C.F. 2015. Ohio (River) Valley Unified Malacologists (OVUM) 2015 Report. Newsletter of the American Malacological Society 46(2): 6-9.
Pearce, T.A., Van Devender, A. & Van Devender, W. 2015. American Malacological Society 2015 land snail field trip at University of Michigan Biological Station. Newsletter of the American Malacological Society 46(2): 4-6.
Shea, E.K., Pearce, T.A. & Sturm, C.F. 2015. Mid-Atlantic Malacologists Meeting – 2015. Newsletter of the American Malacological Society 46(1): 7-9.
Sturm, C.F., Pearce, T.A. & Yanes, Y. 2014. The Eighth Annual Ohio (River) Valley Unified Malacologists Meeting [OVUM]. Newsletter of the American Malacological Society 45(2): 4-5.
Pearce, T.A. & Morgan, R. 2014. First report of the New Zealand mudsnail (Potamopyrgus antipodarum) on the Atlantic slope of the USA. Tentacle, (22): 16.
Pearce, T.A., Watters, G.T. & Sturm, C.F. 2013. Ohio (River) Valley Unified Malacologists 2013 – OVUM 2013. Newsletter of the American Malacological Society 44(2): 5-7.
Pearce, T.A. & Paustian, M.E. 2013. Five land snail species predicted to decline with climate warming in Pennsylvania, USA. Tentacle, Mollusk Conservation Newsletter (21): 7.
Pearce, T.A. 2012. Mollusks on the move. What’s Gnu, Carnegie Museum of Natural History, Jul.-Sep.: 6.
Pearce, T.A. & Paustian, M.E. 2012. From Ivory Tower to Ivory Dungeon: Carnegie Museum Mollusk Collection Has Relocated. Newsletter of the American Malacological Society 43(2): 3-4.
Pearce, T.A. 2012. From ivory tower to ivory dungeon, mollusks are on the move. What’s Gnu, Carnegie Museum of Natural History, Apr-Jun: 5.
Pearce, T.A. & Paustian, M.E. 2012. Snail and slug walk. What’s Gnu, Carnegie Museum of Natural History, Apr-Jun: 8.
Pearce, T.A. & Dolan, T.J. 2012. Are wetlands good for land snails? Tentacle, (20): 27.
Van Devender, A., Pearce, T.A. & Van Devender, W. 2011. AMS 2011 Land Snail Field Trip at Powdermill Nature Reserve. Newsletter of American Malacological Society 42(2): 13-14.
King, M.V. & Pearce, T.A. 2011. Report of the 5th annual Ohio River Valley Unified Malacologist Meeting (OVUM) Thomas More College Center for Ohio River Research and Education, California, KY October 1, 2011. Newsletter of American Malacological Society 42(2): 11.
King, M.V. & Pearce, T.A. 2011. Report of the Fifth annual Ohio River Valley Unified Malacologist Meeting (OVUM), Thomas More College Center for Ohio River Research and Education, California, Kentucky, October 01, 2011. Ellipsaria 13(4): 9.
Pearce, T.A. & Watters, G.T. 2011. Fourth Annual Ohio River Valley Unified Malacologist (OVUM-IV) Meeting November 6, 2010 Summary of Talks. Newsletter of American Malacological Society 42(1): 3-4.
Pearce, T.A. & Payne, S.L. 2011. The scoop on goose poop. Newsletter of American Malacological Society 42(1): 3.
Pearce, T.A. & Paustian, M.E. 2011. A summer of leaf litter. What’s Gnu, Carnegie Museum of Natural History, Jun: 5.
Pearce, T.A. & Payne, S.L. 2011. First record of the European land snail Carychium minimum in Pennsylvania, USA. Tentacle, Mollusk Conservation Newsletter (19): 13-14.
Pearce, T.A. & Hotopp, K.P. 2011. Federally endangered land snail Polygyriscus virginianus (Burch, 1947) still alive in Pulaski County, Virginia, USA (Gastropoda: Helicodiscidae). Tentacle, Mollusk Conservation Newsletter (19): 27-28.
Örstan, A. & Pearce, T.A. 2011. Longevities of colonies of Pomatiopsis lapidaria. Tentacle, Mollusk Conservation Newsletter (19): 33-34.
Pearce, T.A. 2011. New Collection Manager in Section of Mollusks. What’s Gnu, Carnegie Museum of Natural History, Jan.: 1.
Pearce, T.A. & Watters, G.T. 2010. Summary of OVUM IV talks 6 November 2010. Ellipsaria 12(3): 7-8.
Pearce, T.A. 2010. Gastrocopta procera, new state record for Pennsylvania. Tentacle, Mollusk Conservation Newsletter (18): 12-13.
Pearce, T.A. & Klingler, C. 2010. Work of art brings hitchhiking snail to Pennsylvania. What’s Gnu, Carnegie Museum of Natural History, Jan.: 2-3.
Örstan, A. & Pearce, T.A. 2010. On the trail of Wayne Grimm’s Cepaea nemoralis. Newsletter of the American Malacological Society 41(1): 6.
Sturm, C.F. & Pearce, T.A. 2010. Third Annual Ohio River Valley Unified Malacologist (OVUM-3) Meeting Pittsburgh, PA. Newsletter of the American Malacological Society 41(1): 6-9.
Pearce, T.A. & Klingler, C. 2010. Snail becomes a main character in new book. What’s Gnu, Carnegie Museum of Natural History, Aug.: 1.
Pearce, T.A. & Payne, S.L. 2010. First record of European land snail in Pennsylvania. What’s Gnu, Carnegie Museum of Natural History, Oct.: 2.
Pearce, T.A. & Richart, C.H. 2010. American Malacological Society Terrestrial Field Trip Report, 26 June and 1 July 2010: in search of Anadenulus cockerelli. Newsletter of the American Malacological Society 41(2): 9-11.
Pearce, T.A. 2009. Land snails as indicator species: examples from seven bioblitzes in the eastern United States. Tentacle, Mollusk Conservation Newsletter (17): 12-14.
Pearce, T.A. 2009. Wolfsnail Book Wins National Award. What’s Gnu, Carnegie Museum of Natural History, Apr.: 3.
Pearce, T.A. & Isaac, B.L. 2009. Staff Lead Wildflower and Snail Walks. What’s Gnu, Carnegie Museum of Natural History, May: 3.
Pearce, T.A. 2009. Finding the Federally Endangered Virginia Fringed Mountain Snail. What’s Gnu, Carnegie Museum of Natural History, Jul.: 4.
Pearce, T.A. 2009. Marine Mollusks of Bermuda, New Book by Tim Pearce. What’s Gnu, Carnegie Museum of Natural History, Sep.: 4.
Pearce, T.A. 2009. Enhancements to Mollusk Collection. What’s Gnu, Carnegie Museum of Natural History, Oct.: 2.
Pearce, T.A. 2009. News from the Carnegie Museum of Natural History. Newsletter of the American Malacological Society 40(2): 5-6.
Pearce, T.A. 2009. PA Land Snail Atlas Project documents a new state record. What’s Gnu, Carnegie Museum of Natural History, Nov.: 3.
Pearce, T.A. 2009. Marine Mollusks of Bermuda: Checklist & Bibliography. Unitas Malacologica Newsletter (28): 13.
Pearce, T.A. 2009. American malacological society land snail field trip, 3 Aug. 2006, Western Washington. Western Society of Malacologists Annual Report for 2006 39: 41-42.
Pearce, T.A. 2008. The rare land snail Glyphyalinia raderi in Pennsylvania, USA. Tentacle, Mollusk Conservation Newsletter (16): 7-8.
Juves, J.A. & Pearce, T.A. 2008. Enhancing the mollusk collection by improving geography data. Volunteer Connection (Volunteer Newsletter, Carnegie Institute, Pittsburgh) 1(Jan.): 3-4.
Sturm, C.F. & Pearce, T.A. (eds.). 2008. Ohio Valley Unified Malacologists 27 October 2007 Meeting information and abstracts of presentations. Newsletter of the American Malacological Society 39(1): 5-8.
Pearce, T.A. & Isaac, B.L. 2008. Staff Lead Wildflower and Ecology Walks. What’s Gnu, Carnegie Museum of Natural History, May: 3.
Pearce, T.A. & Lutter, R.M. 2008. Numerous land snails in Columbia County. What’s Gnu, Carnegie Museum of Natural History, June: 2.
Pearce, T.A. & Sandorf, Karen. 2008. Carnegie Museum of Natural History Section of Mollusks. Bulletin of the Botanical Society of Western Pennsylvania 2008(June-July): 1, 7.
Pearce, T.A. 2008. Snails from Duff Park BioBlitz . What’s Gnu, Carnegie Museum of Natural History, Nov.: 3.
Pearce, T.A. 2008. Best Adult Nonfiction. What’s Gnu, Carnegie Museum of Natural History, Nov.: 3.
Pearce, T.A. 2008. Mollusks on your planet and in your backyard. Newsletter of the Wissahickon Nature Club 4 Dec: 1.
Sturm, C, Pearce, T.A. & Valdés, A. 2007. The mollusks: a guide to their study, collection, and preservation; a new publication from the American Malacological Society. American Malacological Bulletin 22(1/2): iv-v.
Pearce, T.A. 2007. Proposed highway bridge threatens highest diversity snail site in Pennsylvania. Tentacle, Mollusk Conservation Newsletter (15): 14.
Pearce, T.A. 2007. CMNH researchers contribute to a new publication from the American Malacological Society. What’s Gnu, Carnegie Museum of Natural History, Feb.: 5.
Pearce, T.A. 2007. Ohio Valley Unified Malacologists. What’s Gnu, Carnegie Museum of Natural History, Dec.-Jan. [actual date 11 Dec. 2007]: 2-3.
Pearce, T.A. 2006. New records for Hendersonia occulta (Gastropoda: Helicinidae) in Limestone Areas of Pennsylvania, USA. Tentacle, Mollusk Conservation Newsletter (14): 2-3.
Pearce, T.A. 2006. News from the Carnegie Museum of Natural History Section of Mollusks, Pittsburgh, Pennsylvania. American Malacological Society Newsletter 37(1): 6.
Pearce, T.A. 2006. Chasing Snails on four continents in 33 days. What’s Gnu, Carnegie Museum of Natural History, Aug.: 1.
Pearce, T.A. 2006. Tim Pearce a co-Author of a new mollusk book. What’s Gnu, Carnegie Museum of Natural History, Sep.: 2.
Pearce, T.A. 2006. A puzzle for you. What’s Gnu, Carnegie Museum of Natural History, Sep.: 3.
Andreychek, M. & Pearce, T.A. 2006. Meet Tim Pearce. Dig It! (Official Magazine of DinoMite Kids’ Club), Carnegie Museum of Natural History Division of Education (6): 2-3.
Pearce, T.A. 2006. AMS Land Snail Field Trip 3 August 2006, Western Washington. Newsletter of the American Malacological Society 37(2): 9-10.
Pearce, T.A. 2005. Powdermill Nature Reserve: type locality for a flagellate protozoan. What’s Gnu, Carnegie Museum of Natural History, Jan.: 1-2.
Pearce, T.A. 2005. Carychium nannodes Clapp, 1905 found in Pennsylvania. Tentacle, Mollusk Conservation Newsletter (13): 3-4.
Pearce, T.A. 2005. Rare snail found in Mt. Lebanon. What’s Gnu, Carnegie Museum of Natural History, July: 3.
Pearce, T.A. 2004. Achatina fulica found near Pittsburgh, Pennsylvania, USA. Tentacle, Mollusk Conservation Newsletter (12): 11.
Pearce, T.A. 2004. Surveying Snails in New York State. What’s Gnu, Carnegie Museum of Natural History, July: 1-2.
Pearce, T.A. 2004. Chasing land snails in Turkey. What’s Gnu, Carnegie Museum of Natural History, Aug.: 1-2.
Pearce, T.A. 2003. No correlation of habitat fragment size with land snail diversity. Tentacle, Mollusk Conservation Newsletter (11): 7-8.
Pearce, T.A. 2003. Mollusk collections at the Carnegie Museum of Natural History. Ellipsaria, Newsletter of the Freshwater Mollusk Conservation Society 5(2): 3.
Pearce, T.A. 2003. Giant African snail found near Pittsburgh. What’s Gnu, Carnegie Museum of Natural History, Dec: 2-3.
Pearce, T.A. 2002. Does habitat patch size correlate with land snail diversity? Tentacle, Mollusk Conservation Newsletter (10):11-12.
Pearce, T.A. 2001. Impresiones sobre el Congreso Mundial de Malacología. Boletín de la Sociedad Internacional de Malacologia Médica y Aplicada (12): 10.
Pearce, T.A. 2001. Mid-Atlantic Malacologists in Delaware. American Conchologist 29(2): 13.
Pearce, T.A. 2001. Mid-Atlantic Malacologists fourth annual meeting. Unitas Malacologica Newsletter (17): 6-7.
Pearce, T.A. 2000. Mid-Atlantic Malacologists, Report of Third Annual Meeting. American Conchologist 28(2): 20.
Pearce, T.A. 2000. Few occurrences in Delaware, USA: rare species or not? Tentacle, Mollusk Conservation Newsletter (9): 8.
Pearce, T.A. 1998. Mid-Atlantic Malacologists, Report of First Annual Meeting. American Conchologist 26(2): 28.
Pearce, T.A. 1997. Profile of a research organisation – the Delaware Museum of Natural History. Unitas Malacologica Newsletter (11): 11-12.
PRESENTATIONS WITH PUBLISHED ABSTRACTS
Pearce, T.A. & Arnold, C.D. 2016. Why is the Tiger Snail, Anguispira alternata, declining in Pennsylvania? Abstract of Presentation by Pearce at OVUM 2016 (Ohio Valley Unified Malacologists) meeting 29 Oct. 2016. Newsletter of the American Malacological Society, 47(2): 3-4.
Drost, C.A., Nekola, J.C., Pearce, T.A. & Roth, B. 2016. The land snails and slugs of the California Channel Islands: a current inventory and assessment. California Islands Symposium, 4 Oct., Ventura, CA. [presented by Drost]
Pearce, T.A. & Arnold, C.D. 2016. Decline of Anguispira alternata in Pennsylvania, USA. Abstract of presentation by Pearce at Mid-Atlantic Malacologists Meeting, 7 March, Wilmington, Delaware. American Conchologist 44(2): 20.
Pearce, T.A., Keiser, C.N. & Davidson, R. 2015. Can beetle and snail morphology predict the prey of snail-eating beetles? Abstract of Presentation by Pearce at OVUM 2015 (Ohio Valley Unified Malacologists) meeting, 17 Oct. Newsletter of American Malacological Society 46(2): 7
Pearce, T.A. 2015. Land snail conservation in Mid-Atlantic USA states: Imperilment ranks and recovery plans. P 63 in Garcia, L., Lee, T., Haponski, A., Goto, R. & Duda, T. (eds.). Program and Abstracts, 81st Annual Meeting American Malacological Society, 28-31 Aug. 2015, University of Michigan Biological Station, Pellston, MI.
Pearce, T.A., Dresher, C.M. & Deuter, L.M. 2015. Terrestrial gastropods of South Fox Island, Leelanau County, Lake Michigan, Michigan, USA. P 64 in Garcia, L., Lee, T., Haponski, A., Goto, R. & Duda, T. (eds.). Program and Abstracts, 81st Annual Meeting American Malacological Society, 28-31 Aug. 2015, University of Michigan Biological Station, Pellston, MI.
Sturm, C.F. & Pearce, T.A. 2015. The Sphaeriidae collection of Victor Sterki at the Carnegie Museum of Natural History. P 79 in Garcia, L., Lee, T., Haponski, A., Goto, R. & Duda, T. (eds.). Program and Abstracts, 81st Annual Meeting American Malacological Society, 28-31 Aug. 2015, University of Michigan Biological Station, Pellston, MI. (poster).
Pearce, T.A. 2015. Land Snails of Pennsylvania: updating distribution maps and imperilment ranks. Abstract of Presentation at Mid-Atlantic Malacologists Meeting, 7 March, Wilmington, Delaware. Newsletter of American Malacological Society 46(1): 8.
Pearce, T.A., C.A. Drost, J.C. Nekola, B.F. Coles & N.S. Cobb. 2014. Land Snails on San Clemente Island, California: status report on new finds. OVUM (Ohio Valley Unified Malacologists) Meeting, Cincinnati, OH, 29 Sep. Abstract in Newsletter of the American Malacological Society 45(2): 4-5.
Pearce, T.A. & Yarroll, H.A. 2013. Are slug shells thinner after egg laying? Preliminary findings. Abstract of Presentation by Pearce at OVUM 2013 (Ohio Valley Unified Malacologists) meeting, 12 Oct. Newsletter of American Malacological Society 44(2): 7.
Pearce, T.A. & Fields, M.C. 2011. Carnivore bites the dust: land snail Ancotrema hybridum is A. sportella. Western Society of Malacologists Annual Report for 2010 43: 70 [joint meeting with American Malacological Society]
Paustian, M.E., Barbosa, P. & Pearce, T.A. 2011. Evaluating competition between the invasive slug Arion subfuscus (Draparnaud) and the native slug Philomycus carolinianus (Bosc). Western Society of Malacologists Annual Report for 2010 43: 69 [joint meeting with American Malacological Society]
Pearce, T.A., Robinson, B.P. & Klepacz, M.T. 2011. Influence of weather on land snail movement distances. P 65 in Sturm, C.F., Pearce, T.A. & Zimmerman, A. (eds.). Program and Abstracts, 77th Annual Meeting American Malacological Society, 23-27 July 2011, Pittsburgh, PA.
Reznik, J. & Pearce, T.A. 2011. Preliminary report on terrestrial mollusks and other invertebrates associated with cave ecosystems in Maine. P. 67 in Sturm, C.F., Pearce, T.A. & Zimmerman, A. (eds.). 2011. Program and Abstracts, 77th Annual Meeting American Malacological Society, 23-27 July 2011, Pittsburgh, PA.
Sturm, C.F. & Pearce, T.A. 2011. Publishing on demand: the pros and cons. P. 76 in Sturm, C.F., Pearce, T.A. & Zimmerman, A. (eds.). 2011. Program and Abstracts, 77th Annual Meeting American Malacological Society, 23-27 July 2011, Pittsburgh, PA.
Sturm, C.F., Pearce, T.A. & Moretzsohn, F. 2011. Museum collections and the role of amateur collectors: an example from the Carnegie Museum. P. 77 in Sturm, C.F., Pearce, T.A. & Zimmerman, A. (eds.). 2011. Program and Abstracts, 77th Annual Meeting American Malacological Society, 23-27 July 2011, Pittsburgh, PA.
Pearce, T.A. & Robinson, B. 2010. Affect of temperature and moisture on land snail movement distances. Abstract of Presentation at OVUM 2009 (Ohio Valley Unified Malacologists) meeting, 14 Nov., CMNH, published in American Malacological Society Newsletter 41(1): 7-8
Pearce, T.A. & Unal, C. 2010. Do Philomycus carolinianus (Gastropoda: Philomycidae) prefer to aggregate? Abstract of Presentation at OVUM 2009 (Ohio Valley Unified Malacologists) meeting, 14 Nov., CMNH, published in American Malacological Society Newsletter 41(1): 8
Sturm, C.F., Burkett, A. & Pearce, T.A. 2010. The Herman Wright Collection: a legacy in search of validation. Abstract of Presentation at OVUM 2009 (Ohio Valley Unified Malacologists) meeting, 14 Nov., CMNH, published in American Malacological Society Newsletter 41(1): 8
Pearce, T.A. & Hotopp, K.P. 2009. Updating Knowledge of Land Snail Distributions in New York State. Western Society of Malacologists Annual Report for 2006 39: 27 [joint meeting with American Malacological Society]
Pearce, T.A. 2008. When a snail dies in the forest, how long will the shell persist? Abstract, p. 7, in: Sturm, C.F. & Pearce, T.A. (eds.). 2008. Ohio Valley Unified Malacologists 27 October 2007 Meeting information and abstracts of presentations. Newsletter of the American Malacological Society 39(1): 5-8
Muhs, D.R., Schumann, R.R., McGeehin, J.P., Skipp, G., Beann, J., Johnson, D.L. & Pearce, T.A. 2008. The unusual nature and paleoclimatic significance of sand dunes deposited on the California Channel Islands during the last glacial period. [abstract] P. 58 in: Coonan, T.J., de la Rosa, C.L., Faulkner, K., Garcelon, D.K., Glassow, M., Huston, A., Laughrin, L., Lipski, D., Menard, Y., Piltz, F. & Schwemm, C.A. (organizers), Seventh California Islands Symposium, February 5-7, 2008, Embassy Suites, Oxnard, CA
Pearce, T.A. 2007. When a snail dies in the forest, how long will the shell persist? P 165 in: Jordaens, K., Van Houtte, N., Van Goethem, J. & Backeljau, T. (eds.). World Congress of Malacology, with American Malacological Society, Antwerp, Belgium, 15-20 July 2007.
Sturm, C.F. & Pearce, T.A. 2007. The Sphaeriidae (Mollusca: Bivalvia) of Victor Sterki. P 216 in: Jordaens, K., Van Houtte, N., Van Goethem, J. & Backeljau, T. (eds.). World Congress of Malacology, with American Malacological Society, Antwerp, Belgium, 15-20 July 2007. (Poster, presented 16 July)
Pearce, T.A. & von Dassow, Y.J. 2007. Glacial history of Lake Michigan: influence on distribution of island land snails. Integrative and Comparative Biology 47(supp. 1): e216
Sturm, C.F., Pearce, T.A. & Valdes, A. 2006. The Mollusks: A Guide to Their Study, Collection, and Preservation – a new publication of the American Malacological Society. Abstract in Western Society of Malacologists Annual Report for 2006 39: 35-36 (publication date 2009). Abstract also published p. 103 in: Anderson, R.C. (ed.) 72nd Annual American Malacological Society and 39th Annual Western Malacological Society Meeting Abstracts and Program. Seattle, WA. 29 July -3 August 2006.
Pearce, T.A. & Italia, A.S. 2002. Land snails and slugs in Delaware, USA: Systematic survey reveals new distribution records. Western Society of Malacologists Annual Report (for 2000) 33: 26 [joint meeting with American Malacological Society]
Pearce, T.A. 2001. Distribution of land gastropods on the Delmarva Peninsula, eastern USA: Conservation implications. P. 268 in: Salvini-Plawen, L., Voltzow, J., Sattmann, H. & Steiner, G. (eds.), Abstracts, World Congress of Malacology 2001. Vienna, Austria
Pearce, T.A. 1997. Land snail ecology on northern Kuril Islands, Far Eastern Russia: habitat versus isolation. Western Society of Malacologists Annual Report 30/31:53 [joint meeting with American Malacological Society]
Emberton, K.C. & Pearce, T.A. 1995. Land-snail diversity patterns differ from those of vertebrate and plant groups in the southeastern half of Madagascar. International Symposium, Biogeography of Madagascar, Program-Abstracts, Société de Biogéographie, Paris, 26-28 September 1995:26.
Pearce, T.A. & Naranjo-García, E. 1991. Biogeography and systematics of Polygyra land snails from Western Mexico and southern U.S.A. Annual Report of the Western Society of Malacologists 24:33. [Joint meeting with American Malacological Union]
Pearce, T.A. 1989[1990]. Evolutionary relationships of Micrarionta land snails on San Nicolas Island, California. In: Symposium on systematics, anatomy and evolution of western North American land mollusks, in honor of Walter B. Miller. Annual Report of the Western Society of Malacologists 22:7. [Joint meeting with American Malacological Union]
Pearce, T.A. 1986. Evolutionary relationship between fossil and modern Micrarionta (Pulmonata: Helminthoglyptidae) on San Nicolas Island, California. American Malacological Bulletin, 4(2): 237. Also published in Annual Report of the Western Society of Malacologists 19:16-17.
Pearce, T.A. 1985[1986]. Morphological relationships among Micrarionta spp., land snails endemic to the California Islands (Pulmonata: Helminthoglyptidae). Annual Report of the Western Society of Malacologists 18:25-26.
Pearce, T.A. 1984. Fossil and Recent Micrarionta on San Nicolas Island, California. American Malacological Bulletin 3(1):98.
