''Stomatella modesta'' 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 ...

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.MolluscaBase eds. (2022). MolluscaBase. Stomatella modesta H. Adams & A. Adams, 1864. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=863105 on 2022-06-24

Description

The height of the shell attains 2 mm, its diameter 4 mm. The fragile, thin shell has an orbiculate-conoid shape and is much depressed. It is imperforate and is transversely minutely striate-costulate. Its color is whitish painted with irregular chestnut spots. The

spire A spire is a tall, slender, pointed structure on top of a roof of a building or tower, especially at the summit of church steeples. A spire may have a square, circular, or polygonal plan, with a roughly conical or pyramidal shape. Spires are ...

is obtuse and contains four convex

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, separated by impressed sutures. The first whorl is narrow and slowly increasing. The

body whorl The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the b ...

is large, rather convex above, and rounded beneath. The large

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 very oblique and subrotund. The acute peristome is interrupted. The columellar margin is a little reflexed at the insertion. The throat is a little pearly.H.A. Pilsbry (1890) Manual of Conchology XII; Academy of Natural Sciences, Philadelphia, 1890
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Distribution

This marine 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

* 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 111 73–158.

External links

dams, H. & Adams, A. (1864). Descriptions of new species of shells, chiefly from the Cumingian collection. Proceedings of the Zoological Society of London. 1863: 428-435

Issel, A. (1869). Malacologia del Mar Rosso. Ricerche zoologiche e paleontologiche. Biblioteca Malacologica, Pisa. xi + 387 pp., pls 1-5.

Adams, H. (1872). Further descriptions of new species of shells collected by Robert M'Andrew, Esq., in the Red Sea. Proceedings of the Zoological Society of London. 1872: 9-12, pl. 3

Hoenselaar H.J. & Dekker H. (1998). Molluscs of the Great Bitter Lake, Suez Canal, Egypt, collected by C. Beets in 1950. Basteria. 62(5/6): 197-214
{{DEFAULTSORT:Stomatella Modesta

modesta ''Modesta'' is a 1956 short film, set in Puerto Rico, in which a peasant woman rebels against her husband's authoritarianism. She and the other women of her community organize the Liberated Women League to fight for their rights. It stars Ant ...

Gastropods described in 1864