A fresh start in ambersnail (Gastropoda: Succineidae) taxonomy: finding a foothold using a widespread species of Oxyloma

  • Kathryn E. Perez Biology Department, University of Texas Rio Grande Valley, 1201 W. University Dr., Edinburg, TX, 78504, USA https://orcid.org/0000-0003-3888-4756
  • Marco A. Martinez Cruz Biology Department, University of Texas Rio Grande Valley, 1201 W. University Dr., Edinburg, TX, 78504, USA
  • Brent W. Steury National Park Service, George Washington Memorial Parkway Headquarters, 700 George Washington Memorial Parkway, McLean, VA 22101, USA
  • Gary M. Barker Landcare Research, 54 Gerald Street, Lincoln 7608, Lincoln, New Zealand
Keywords: mollusc phylogenetics, integrative taxonomy, COI, LSU, land snail anatomy


The ambersnails (Succineidae), found nearly worldwide, are considered a very challenging group to classify and identify with even genus-level identifications requiring dissection. In this study, we use mitochondrial and nuclear DNA markers, shell morphometrics, and anatomical dissection to examine fresh material collected from the type localities of two nominal species in Oxyloma (Neoxyloma). We conclude from these evidence that Oxyloma salleanum (L. Pfeiffer, 1850) and Oxyloma effusum (L. Pfeiffer, 1853) are conspecific, and accordingly reduce O. effusum to the status of junior synonymy. We present a redescription of O. salleanum.


Adams D.C., Collyer M.L. & Kaliontzopoulou A. 2018. Geomorph: software for geometric morphometric analyses. R package version 3.0.6. Available from https://cran.r-project.org/package=geomorph [accessed 19 May 2019].

Binney W.G. 1859. The terrestrial air-breathing mollusks of the United States and the adjacent territories of North America. Vol. IV. The Boston Journal of Natural History 7: 1–207. https://doi.org/10.5962/bhl.title.6077

Binney W.G. 1878. The terrestrial air-breathing mollusks of the United States and the adjacent territories of North America. Vol. V. Bulletin of the Museum of Comparative Zoology at Harvard College 4: 1–439. https://doi.org/10.5962/bhl.title.6077

Binney W.G. 1885. A manual of American land shells. United States National Museum, Bulletin 28: 1–528. https://doi.org/10.5479/si.03629236.28.1

Binney W.G. & Bland T. 1869. Land and freshwater shells of North America. Part I. Pulmonata Geophila. Smithsonian Miscellaneous Collections 194: 1–316.

Burch J.B., Patterson C.M. & Natarajan R. 1966. Chromosomes of four species of North America Succineidae. Venus, Japanese Journal of Malacology 24: 342–353.

Culver M., Herrmann H.-W., Miller M., Roth B. & Sorenson J. 2013. Anatomical and genetic variation of western Oxyloma (Pulmonata: Succineidae) concerning the endangered Kanab ambersnail (Oxyloma haydeni kanabense) in Arizona and Utah. Scientific Investigations Report, vii. Reston, VA. https://doi.org/10.3133/sir20135164

Edgar R.C. 2004. MUSCLE: multiple sequence alignment with high accuracy and high throughput. Nucleic Acids Research 32: 1792–1797. https://doi.org/10.1093/nar/gkh340

Folmer O.M., Black W., Hoeh R., Lutz R. & Vrijenhoek R. 1994. DNA primers for amplification of mitochondrial cytochrome c oxidase subunit I from diverse metazoan invertebrates. Molecular Marine Biology and Biotechnology 3: 294–299. Available from https://pubmed.ncbi.nlm.nih.gov/7881515/ [accessed 26 May 2021].

Franzen D.S. 1963. Variations in the anatomy of the succineid gastropod Oxyloma retusa. The Nautilus 76: 82–95. Available from https://www.biodiversitylibrary.org/item/34841#page/102/mode/1up [accessed 26 May 2021].

Franzen D.S. 1964. Anatomy of the succineid gastropod Oxyloma haydeni. The Nautilus 77: 73–81.

Franzen D.S. 1966. Anatomy of the succineid gastropod Oxyloma salleana (Pfeiffer). The Nautilus 80: 59–69.

Franzen D.S. 1971. Anatomy and geographic distribution of the succineid gastropod, Succinea vaginacontorta Lea. The Nautilus 84: 131–142.

Franzen D.S. 1983. A new species of Catinella (Succineidae): Pulmonata from southern Michigan. The Nautilus 97: 138–144. https://doi.org/10.5962/bhl.part.5284

Franzen D.S. 1985. Succinea vaginacontorta Lee (Gastropoda: Pulmonata: Succineidae). The Nautilus 99: 94–97. https://doi.org/10.5962/bhl.part.2792

Gratacap L.P. 1901. Catalogue of the Binney and Bland Collection of the terrestrial air-breathing mollusks of the United States and Territories, in the American Museum of Natural History, with enumeration of the types and figured specimens, and supplementary notes. Bulletin of the American Museum of Natural History 14: 335–403. Available from https://digitallibrary.amnh.org/handle/2246/1226 [accessed 26 May 2021].

Hammer Ø., Harper D.A.T. & Ryan P.D. 2001. PAST: paleontological statistics software package for education and data analysis. Palaeontologia Electronica 4: 1–9. Available from https://palaeo-electronica.org/2001_1/past/issue1_01.htm [accessed 26 May 2021].

Hoang D.T., Chernomor O., von Haeseler A., Minh B.Q. & Vinh L.S. 2018. UFBoot2: improving the ultrafast bootstrap approximation. Molecular Biology and Evolution 35: 518–522. https://doi.org/10.1093/molbev/msx281

Huson D.H. & Scornavacca C. 2012. Dendroscope 3: an interactive tool for rooted phylogenetic trees and networks. Systematic Biology 61: 1061–1067. https://doi.org/10.1093/sysbio/sys062

Kapli P., Lutteropp S., Zhang J., Kobert K., Pavlidis P., Stamatakis A. & Flouri T. 2017. Multi-rate Poisson tree processes for single-locus species delimitation under maximum likelihood and Markov chain Monte Carlo. Bioinformatics 33: 1630–1638. https://doi.org/10.1093/bioinformatics/btx025

Kearse M., Moir R., Wilson A., Stones-Havas S., Cheung M. & Sturrock S. 2012. Geneious basic: an integrated and extendable desktop software platform for the organization and analysis of sequence data. Bioinformatics 28: 1647–1649. https://doi.org/10.1093/bioinformatics/bts199

Li W., Cowley A., Uludag M., Gur T., McWilliam H., Squizzato S., Park Y.M., Buso N. & Lopez R. 2015. The EMBL-EBI bioinformatics web and programmatic tools framework. Nucleic Acids Research 43: W580–W584. https://doi.org/10.1093/nar/gkv279

Masters B.C., Fan V. & Ross H.A. 2011. Species delimitation – a geneious plugin for the exploration of species boundaries. Molecular Ecology Resources 11: 154–157. https://doi.org/10.1111/j.1755-0998.2010.02896.x

Miles C.D. 1958. The family Succineidae (Gastropoda: Pulmonata) in Kansas. University of Kansas Science Bulletin 38: 1499–1543.

Minh B.Q., Nguyen M.A.T. & von Haeseler A. 2013. Ultrafast approximation for phylogenetic bootstrap. Molecular Biology and Evolution 30: 1188–1195. https://doi.org/10.1093/molbev/mst024

Nekola J.C. 2014. Overview of the North American terrestrial gastropod fauna. American Malacological Bulletin 32: 225–235. https://doi.org/10.4003/006.032.0203

Nguyen L.-T., Schmidt H.A., von Haeseler A. & Minh B.Q. 2015. IQ-TREE: a fast and effective stochastic algorithm for estimating maximum-likelihood phylogenies. Molecular Biology and Evolution 32: 268–274. https://doi.org/10.1093/molbev/msu300

Örstan A. 2010. Reproductive biology and annual population cycle of Oxyloma retusum (Pulmonata: Succineidae). American Malacological Bulletin 28: 113–120. https://doi.org/10.4003/006.028.0203

Patterson C.M. 1971. Taxonomic studies on the land snail family Succineidae. Malacological Review 4: 131–202.

Patterson C.M. 1972. Generic and specific characters in the land snail family Succineidae. Malacological Review 6: 54–56.

Patterson C.M. 1973. Parallel evolution of shell characters in succineids inhabiting waterfalls. Bulletin of the American Malacological Union 38: 28.

Pfeiffer L. 1850. Descriptions of twelve new species of Vitrina and Succinea, from the collection of H. Cuming, Esq. Proceedings of the Zoological Society of London 17 (1849): 132–134. Available from https://www.biodiversitylibrary.org/page/30572567 [accessed 1 Jun. 2021].

Pfeiffer L. 1853. Monographia Heliceorum Viventium. Sistens Descriptiones Systematicas et Criticas omnium huius Familiae Generum et Specierum hodie Cognitarum, Vol. 3. F.A. Brockhaus, Leipzig. https://doi.org/10.5962/bhl.title.10791

Pfeiffer L. 1855. Descriptions of fifty-seven new species of Helicea, from Mr. Cuming’s collection. Proceedings of the Zoological Society of London 1854: 286–298. https://doi.org/10.1111/j.1469-7998.1854.tb07277.x

Pilsbry H.A. 1948. Land Mollusca of North America (North of Mexico). Vol. 2, Part 2. Academy of Natural Sciences of Philadelphia, Philadelphia, PA.

Puillandre N., Lambert A., Brouillet S. & Achaz G. 2011. ABGD, Automatic Barcode Gap Discovery for primary species delimitation. Molecular Ecology 21: 1864–1877. https://doi.org/10.1111/j.1365-294X.2011.05239.x

Quick H.E. 1933. The anatomy of British Succinneae. Proceedings of the Malacological Society of London 20: 295–318.

R Core Team. 2017. R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna.

Reeve L., Brooks V., Reeve F., Sowerby G.B., Sowerby G.B., Taylor J.E., Reeve B., Reeve, Savill E., Co, Spottiswoode, Co, Vincent Brooks D. & Son. 1873. Conchologia Iconica, or, Illustrations of the Shells of Molluscous Animals, Vol. 18. Reeve, Brothers, London. https://doi.org/10.5962/bhl.title.8129

Rohlf F.J. 1993. Relative warp analysis and an example of its application to mosquito wings. In: Marcus L.F., Bello E. & García-Valdecasas A. (eds) Contributions to Morphometrics: 131–159. Museo Nacional de Ciencias Naturales-CSIC, Madrid.

Rohlf F.J. 2001. TpsDig. Available from http://www.sbmorphometrics.org/ [accessed 15 Apr. 2020].

Rohlf F.J. 2003. TpsRelw, relative warps analysis. Available from http://www.sbmorphometrics.org/ [accessed 15 Apr. 2020].

Rohlf F.J. 2006. Tpsutil. Available from http://www.sbmorphometrics.org/ [accessed 15 Apr. 2020].

Roth B., Jadin R. & Robert G. 2013. The taxonomic status of Deroceras hesperium Pilsbry, 1944 (Gastropoda: Pulmonata: Agriolimacidae), a species of conservation concern in Oregon, USA. Zootaxa 3691: 453–460. https://doi.org/10.11646/zootaxa.3691.4.4

Saghai-Maroof M.A., Soliman K.M., Jorgensen R.A. & Allard R.W. 1984. Ribosomal DNA spacer- length variation in barley: Mendelian inheritance, chromosomal location and population dynamics. Proceedings of the National Academy of Sciences of the United States of America 81: 8018–8021. https://doi.org/10.1073/pnas.81.24.8014

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.

USGS [United States Geological Survey]. 2004. North America Rivers and Lakes. Available from https://www.sciencebase.gov/catalog/item/4fb55df0e4b04cb937751e02 [accessed 15 May 2020].

Vidigal T.H.D.A., Coscarelli D., Paixão H., Bernardes S., Montresor L.C. & Pepato A.R. 2018. Integrative taxonomy of the neotropical genus Omalonyx (Elasmognatha: Succineidae). Zoologica Scripta 47: 174–186. https://doi.org/10.1111/zsc.12271

Wade C.M., Mordan P.B. & Clarke B. 2001. A phylogeny of the land snails (Gastropoda: Pulmonata). Proceedings of the Royal Society of London B 268: 413–422. https://doi.org/10.1098/rspb.2000.1372

Weber G.W. & Bookstein F.L. 2011. Virtual Anthropology: A Guide to a New Interdisciplinary Field. Springer-Verlag, Wien, London.

Westerlund C.A. 1885. Fauna der in der Paläarctischen Region (Europa, Kaukasien, Sibirien, Turan, Persien, Kurdistan, Armenien, Mesopotamien, Kleinasien, Syrien, Arabien, Egypten, Tripolis, Tunesien, Algerien und Marocco) lebenden Binnenconchylien. Vol. V. Fam. Succineidae, Auriculidae, Limnaeidae, Cyclostomidae und Hydrocenidae. H. Ohlsson, Lund.

Wu S.K. 1993. Notes on the succineid land snails of New Mexico. Malacological Review 26: 91–94.

How to Cite
Perez, K. E., Martinez Cruz, M. A., Steury, B. W., & Barker, G. M. (2021). A fresh start in ambersnail (Gastropoda: Succineidae) taxonomy: finding a foothold using a widespread species of Oxyloma. European Journal of Taxonomy, 757(1), 102–126. https://doi.org/10.5852/ejt.2021.757.1419
Research article