Subestea Cotton, 1944

Amati, Bruno, Giulio, Andrea Di & Oliverio, Marco, 2023, Shallow-water Rissoidae of the genera Alvania Risso 1826 Haurakia Iredale 1915 Parashiela Laseron 1956 Simulamerelina Ponder 1985 and Subestea Cotton 1944 Gastropoda Caenogastropoda Rissooidea from French Polynesia with the description of a new deep-water genus, Zoosystema 45 (25), pp. 803-892 : 872

publication ID

https://doi.org/ 10.5252/zoosystema2023v45a25

publication LSID

lsid:zoobank.org:pub:054D312B-C54B-459D-8A47-AC9CB681D7D4

DOI

https://doi.org/10.5281/zenodo.10427273

persistent identifier

https://treatment.plazi.org/id/03E387F1-0B2E-754A-FE94-4D77E8E5FD47

treatment provided by

Plazi

scientific name

Subestea Cotton, 1944
status

 

Genus Subestea Cotton, 1944 View in CoL

Subestea Cotton, 1944: 292 View in CoL .

TYPE SPECIES. — Alvania seminodosa May, 1915: 94-95 ; plate VI, fig. 30 (synonym of Subestea australiae ( Frauenfeld, 1867)) by original designation.

DIAGNOSIS. — Shell of small size for the family (height c. 2 mm); elongate-conical to elongate-oval, rather robust, non-umbilicate, with spiral and axial sculpture varying in strength, spiral sculpture usually stronger than axial sculpture, sometimes subequal, sometimes almost obsolete. Microsculpture from dense spiral stretches. Aperture simple, subcircular. Protoconch paucispiral, dome-shaped, of about 1 ½ whorls, sculptured with smooth spiral lirae, interspaces with granules or micro pits (from Ponder, 1985 with personal modifications).

Head-foot: cephalic tentacles moderately long, ciliated ventrally, with parallel sides or slightly expanded distally; small anterior pallial tentacle and very short, broad, posterior metapodial tentacle; indistinct, triangular anterior pedal gland and no posterior pedal gland. Operculum: oval, thin, nucleus eccentric, last whorl large (after Ponder 1985: 59).

REMARKS

Subestea Cotton, 1844 View in CoL was sometimes ranked as a subgenus of Onoba H. Adams & A. Adams, 1852 View in CoL ( Ponder 1985: 59), and is currently regarded as a valid genus ( Criscione et al. 2016: 13). It comprises a small group of six species ( MolluscaBase 2023e) living from the lower intertidal to the continental shelf, where they are often associated with algal facies, in the tropical western and southern Atlantic, the tropical Indo-West Pacific, and South Africa. A single, undescribed species has been found in the Tuamotu and Gambier.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Littorinimorpha

Family

Rissoidae

Loc

Subestea Cotton, 1944

Amati, Bruno, Giulio, Andrea Di & Oliverio, Marco 2023
2023
Loc

Subestea

COTTON B. C. 1944: 292
1944
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