A new species of Casmaria H. Adams & A. Adams, 1853 (Gastropoda, Cassidae) from the Philippines identified by molecular data

  • Alexander Fedosov A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 119071, Leninsky prospect 33, Moscow, Russia
  • Baldomero M. Olivera Department of Biology, University of Utah, Salt Lake City, UT 84112, USA
  • Maren Watkins Department of Biology, University of Utah, Salt Lake City, UT 84112, USA
  • Varvara Barkalova Moscow State University, Faculty of Biology, 1-12, Leninskie Gory, Moscow, 119991 Russia
Keywords: Polymorphic species, CO1, Cassidae, Casmaria, Indo-Pacific

Abstract

The genus Casmaria H. Adams & A. Adams, 1853 (family Cassidae) is widespread in the tropical Indo-Pacific and has been documented from some Atlantic localities as well. Two Casmaria species, C. erinaceus (Linnaeus, 1758) and C. ponderosa (Gmelin, 1791), are common in Indo-Pacific shallow-water sandy bottom communities and are characterized by high morphological variability; both species encompass multiple, often sympatric forms of uncertain status. In the present study we carry out a phylogenetic analysis of some Philippine Casmaria morphs and demonstrate that one of the distinctive morphs earlier assigned to Casmaria ponderosa is in fact a different species, which we describe as Casmaria boblehmani sp. nov. The smooth form of Casmaria ponderosa, C. ponderosa ponderosa, and the solid nodulose form, widely called “form nodulosa” despite being strikingly different in shell morphology, are shown to be conspecific. Studied specimens of these two morphs even from different localities share the same haplotype of the CO1 gene. In light of these new data on the morphological variability of Casmaria species, we discuss criteria of species delimitation in the genus Casmaria and possible affinities of Casmaria boblehmani sp. nov. within the genus.

References

Abbott R.T. 1968. The helmet shells of the world (Cassidae). Part 1. Indo-Pacific Mollusca 2 (9): 7-198.

Beu A., Bouchet P. & Tröndlé J. 2012. Tonnoidean gastropods of French Polynesia. Molluscan research 32: 61-120.

Buijse J.A., Dekker H. & Verbinnen G. 2013. On the identity of Casmaria species (Gastropoda, Cassidae), with descriptions of two new species. Acta Conchyliorum 14: 3-93.

Clench W. J. 1944. The genera Casmaria, Galeodea, Phalium and Cassis in the Western Atlantic. Johnsonia 1 (16): 1-16.

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

Fedosov A. E., Watkins M., Showers Corneli P., Heralde F. M. Concepcion G. P. & Olivera B. M. 2011. Phylogeny of the genus Turris: correlating molecular markers with radular anatomy and shell morphology. Molecular Phylogenetics and Evolution 59: 263-270. http://dx.doi.org/10.1016/j.ympev.2011.01.019

Hall T.A. 1999. BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucleic Acids Symposium Series 41: 95-98.

Harris G.F. 1897. Catalogue of the Tertiary Mollusca in the Department of Geology, Part I. The Australasian Tertiary Mollusca. British Museum (Natural History), London.

Huelsenbeck J.P., Ronquist F. & Hall B. 2001. MrBayes: Bayesian inference of phylogenetic trees. Bioinformatics 17: 754-755. http://dx.doi.org/10.1093/bioinformatics/17.8.754

Kreipl K. 1997. Recent Cassidae. Verlag Christa Hemman, Wiesbaden, Germany.

Kreipl K. 2008. Family Cassidae. In: Poppe G.T. (ed.) Philippine Marine Mollusks. Conchbooks, Hackenheim.

Puillandre N., Lambert A., Brouillet S. & Achaz G. 2012. ABGD, Automatic Barcode Gap Discovery for primary species delimitation. Molecular Ecology 21 (8): 1864-1877. http://dx.doi.org/10.1111/j.1365-294X.2011.05239.x

Robin A. 2008. Encyclopedia of Marine Gastropods. Xenophora and Conchbooks. Hackenheim, Germany.

Published
2014-03-28
How to Cite
Fedosov, A., Olivera, B. M., Watkins, M., & Barkalova, V. (2014). A new species of Casmaria H. Adams & A. Adams, 1853 (Gastropoda, Cassidae) from the Philippines identified by molecular data. European Journal of Taxonomy, (78). https://doi.org/10.5852/ejt.2014.78