''Stomatella callosa'' is a
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
of
sea snail
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...
, a marine
gastropod
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda ().
This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...
mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...
in the
family
Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...
Trochidae
The Trochidae, common name top-snails or top-shells, are a family of various sized sea snails, marine gastropod molluscs in the subclass Vetigastropoda. This family is commonly known as the top-snails because in many species the shell resembles ...
, the top snails.
Description
The length of the shell attains 11 mm, its diameter 7 mm. The complanate shell is ovate, elongated, transversely delicately striate and contains two
whorl
A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs).
Whorls in nature
File:Photograph and axial plane floral ...
s. The
apex is somewhat prominent. The oblong
aperture
In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane.
An opt ...
is ear-shaped. Its right
lip is simple, somewhat excavated in the middle. The
columella is margined, strong, thickened, callous and provided with a tooth-like tubercle. The margins are continuous and joined by a callus.
H.A. Pilsbry (1890) Manual of Conchology XII; Academy of Natural Sciences, Philadelphia, 1890
(described as ''Gena callosa'')
Distribution
This species occurs in the Red Sea
The Red Sea ( ar, البحر الأحمر - بحر القلزم, translit=Modern: al-Baḥr al-ʾAḥmar, Medieval: Baḥr al-Qulzum; or ; Coptic: ⲫⲓⲟⲙ ⲛ̀ϩⲁϩ ''Phiom Enhah'' or ⲫⲓⲟⲙ ⲛ̀ϣⲁⲣⲓ ''Phiom ǹšari''; T ...
.
References
* Savigny, J-.C., 1817 Description de l'Egypte, ou recueil des observations et des recherches qui ont été faites en Egypte pendant l'expédition de l'Armée française, publié par les ordres de sa Majesté l'Empereur Napoléon le Grand. Histoire Naturelle, p. 339 pp
* Fischer, P., 1871. Diagnoses des espèces nouvelles. Journal de Conchyliologie 19: 218-219
* Vaught, K.C. (1989). ''A classification of the living Mollusca''. American Malacologists: Melbourne, FL (USA). . XII, 195 pp
* Pallary, P. (1926). Explication des planches de J.C. Savigny. Mémoires présentés à l'Institut d'Égypte. i-viii, 1-138, pl. 1-18. Le Caire.
* Vine, P. (1986). Red Sea Invertebrates. Immel Publishing, London. 224 pp.
* Zuschin, M., Janssen, R. & Baal, C. (2009). Gastropods and their habitats from the northern Red Sea (Egypt: Safaga). Part 1: Patellogastropoda, Vetigastropoda and Cycloneritimorpha. Annalen des Naturhistorischen Museums in Wien
External links
Blatterer H. (2019). Mollusca of the Dahab region (Gulf of Aqaba, Red Sea). Denisia. 43: 1-480
{{DEFAULTSORT:Stomatella Callosa
callosa
Gastropods described in 1871