Geometric morphometric analysis of the shell of Cerion mumia (Pulmonata: Cerionidae) and related species

Jonathan P. Miller, e-mail:

Museo Nacional de Ciencias Naturales, c/ Jose Gutierrez Abascal, 2, 28006 Madrid, Spain

Cerion mumia is a complex of eight subspecies distributed along the north coast of Cuba from Pinar del Rio to Camaguey provinces. The geometric morphometric analysis presented here was aimed at identifying patterns of shell shape variation to test the hypothesis of colonisation through land bridges during the Eocene-Oligocene. C. mumia cuspidatum, the easternmost population, was similar in shape to the subspecies from the north coast of Havana, but showed morphometric differences suggesting allopatric speciation followed by dispersal. The shells from the west were more globose than those from Havana or the east, which tended to be more cylindrical, as shown by the thin-plate spline analysis. As a result of the morphometric analysis I propose to elevate C. noriae comb. nov. and C. wrighti comb. nov. to species rank and to include C. noriae hondanum comb. nov. as a subspecies of C. noriae comb. nov. I report a second locality of C. noriae comb. nov. at Playa Santa Fe formation from the late upper Pleistocene. Geometric morphometric techniques are useful in species identification through comparing new samples with type material.

Key words
Geometric morphometrics; patterns of variation; shell shape; land snails; Cerion

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Folia Malacologica (2016) 24: 239-250
First published on-line: 2016-12-05 00:00:00
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