Exceptional among the exceptional: a new species of Stenogyropsis Möllendorff, 1899 (Eupulmonata: Camaenidae), with a review of the free last whorl in terrestrial gastropods

Author:

Chen Zhe-Yu12,Huang Bo3,Páll-Gergely Barna4

Affiliation:

1. Hubei Broad Nature Technology Service Co., Ltd. , Wuhan 430079, China

2. School of Life Sciences, Nanjing University , Nanjing 210023, China

3. No. 2474 Donggang East Road , Lanzhou, China

4. Centre for Agricultural Research, Plant Protection Institute , Herman Ottó Street 15, H-1022 Budapest, Hungary

Abstract

ABSTRACT Stenogyropsis is one of the few genera of Helicoidea having a high-spired shell. Here, we describe a new species (Stenogyropsis chorismenostoma n. sp.) that has a further remarkable trait: its last quarter whorl is detached from the penultimate whorl. We also show that a partly detached last whorl has evolved much more frequently in terrestrial Caenogastropoda than in Stylommatophora relative to the number of species within those groups. This may be due to the more superficial contact of the neighbouring whorls in the former group.

Publisher

Oxford University Press (OUP)

Subject

Animal Science and Zoology,Aquatic Science

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