Assiminea ovata

Last updated

Assiminea ovata
Assiminea ovata 002.jpg
Shell of Assiminea ovata
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family: Assimineidae
Genus: Assiminea
Species:
A. ovata
Binomial name
Assiminea ovata
(Krauss, 1848)
Synonyms [1]
  • Assiminea bifasciataNevill, 1880
  • Assiminea capensisBartsch, 1915
  • Paludina ovataKrauss, 1848 (original combination)

Assiminea ovata is a species of minute operculate snail, a marine gastropod mollusk or micromollusk in the family Assimineidae. [1]

Contents

Description

The length of the shell attains 5½ mm, its diameter 3½ mm.

(Original description in Latin) The shell is ovately pointed, solid, yellowish, and smooth. It has seven slightly convex whorls. The body whorl is convex and is shorter than the conical spire. The suture is moderate.

The aperture is ovate, with an apex. The outer lip is simple and acute. [2]

(Description in Latin by Nevill) The shell is imperforate, ovate-conical, and solid. It is scarcely smooth, somewhat shiny, and dull greenish. It is encircled by two brownish and somewhat faint bands. The spire is moderately elongated, convex-conical, with a somewhat acute apex. It has 6½ rather convex whorls. The body whorl is swollen and bulging and is subangulate at the periphery. The aperture is wide and nearly vertical. The margins are joined by a very strong callus, which has a brown edge. The inner lip is nearly straight, strongly thickened, dull brown, and somewhat rounded below. [3]

(Described as Assiminea capensisBartsch, 191) The shell is broadly conic and thick, with a light brown color. The whorls of the protoconch are not differentiated from the postnuclear whorls. The postnuclear whorls are well rounded and feebly shouldered at the summit. They are marked by decidedly retractive lines of growth and exceedingly fine spiral striations. The sutures are moderately constricted. The periphery of the body whorl is strongly inflated and obscurely angulate. The base is short, well rounded, and marked like the spire. The aperture is very large and irregularly ovate, with an acute posterior angle. The outer lip is thick within but thin at the edge. The inner lip is thick, appressed, and strongly curved. It is continuous with the thick callus covering the body whorl. [4]

Distribution

This species occurs in the Indian Ocean off Mozambique and South Africa.

References

  1. 1 2 Assiminea ovata (Krauss, 1848) . 30 November 2025. Retrieved through: World Register of Marine Species .
  2. ↑ Krauss, F. (1848). Die Südafrikanischen Mollusken. Ein Beitrag zur Kenntniss der Mollusken des Kap- und Natallandes und zur Geographischen Verbreitung derselben mit Beschreibung und Abbildung der neuen Arten. Stuttgart: Die Südafrikanischen Mollusken. Ein Beitrag zur Kenntniss der Mollusken des Kap- und Natallandes und zur Geographischen Verbreitung derselben mit Beschreibung und Abbildung der neuen Arten. p. 85. Retrieved 30 November 2025.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  3. ↑ Nevill, G. (1880). "New species of brackish-water mollusks". The Journal of the Asiatic Society of Bengal, Part I. 49 (3): 162. Retrieved 30 November 2025.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  4. ↑ Bartsch, P. (1915). "Report on the Turton Collection of South African marine mollusks, with additional notes on other South African shells contained in the United States National Museum". Bulletin. United States National Museum. 91: 135. Retrieved 30 November 2025.PD-icon.svg This article incorporates text from this source, which is in the public domain .
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.