Caecum cooperi S. Smith, 1860

Egger, Christina, Neusser, Timea P., Norenburg, Jon, Leasi, Francesca, Buge, Barbara, Vannozzi, Angelo, Cunha, Regina L., Cox, Cymon J. & Joerger, Katharina M., 2020, Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America, ZooKeys 968, pp. 1-42 : 1

publication ID

https://dx.doi.org/10.3897/zookeys.968.52986

publication LSID

lsid:zoobank.org:pub:4296306E-51B9-4873-AB6F-4B475194CA98

persistent identifier

https://treatment.plazi.org/id/D9CA2160-302B-5D14-85AC-4ADAC3A1015A

treatment provided by

ZooKeys by Pensoft

scientific name

Caecum cooperi S. Smith, 1860
status

 

Caecum cooperi S. Smith, 1860

Caecum cooperi S. Smith, 1860: 154-155. Type locality: northern part of Gardiner’s Bay, four or five fathoms [United States].

Caecum costatum A. E. Verrill, 1872: 283, pl. 6, fig. 6, Caecum smithi Cooper, 1872.

Material examined.

French Antilles • 1 (Fig. 6F-I View Figure 6 ); Guadeloupe; 16.3558, -61.5965; depth 2 m; 24 May 2012; MNHN KARUBENTHOS exped.; Stat. GS32; GenBank: MT704297, MT731713; MNHN-IM-2019-32.

Shell morphology.

Shell opaque, with whitish diffuse patterns. Size> 2 mm, tube narrow and elongated, curvature increasing towards posterior end (Fig. 6F, G View Figure 6 ). Septum flat, triangular shaped, strongly pointed mucro (Fig. 6H View Figure 6 ) similar to mucro in C. imbricatum . Prominent and conspicuous shell ornamentation, minimum of 20 longitudinal strings of beads, more pronounced towards aperture (Fig. 6I View Figure 6 ).

Remarks.

Our molecular species delimitation separates C. cooperi and C. imbricatum into two independent evolving sister species (see Figs 3 View Figure 3 , 4 View Figure 4 ). This is supported by (minor) morphological differences such as a finer but more pronounced bead-like ornamentation in C. cooperi in comparison to flattened squarish and less frequent longitudinal pattern. The included barcodes and distinguishing diagnostic features should help to overcome previous taxonomic uncertainty suggestive of synonymy (see C. imbricatum sensu Moore (1972: 888, fig. 6)). The putative synonymy of C. insularum Moore, 1969 and C. imbricatum (compare C. imbricatum sensu Tunnell et al. (2010: 144) = C. insularum sensu Moore (1970: 370, fig. 1A, B) needs to be tested by molecular data, ideally based on material recollected from the type localities.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Littorinimorpha

Family

Caecidae

Genus

Caecum

Loc

Caecum cooperi S. Smith, 1860

Egger, Christina, Neusser, Timea P., Norenburg, Jon, Leasi, Francesca, Buge, Barbara, Vannozzi, Angelo, Cunha, Regina L., Cox, Cymon J. & Joerger, Katharina M. 2020
2020
Loc

Caecum costatum

A. E. Verrill 1872
1872
Loc

Caecum smithi

Cooper 1872
1872
Loc

Caecum cooperi

S. Smith 1860
1860