Atlanta oligogyra
| Atlanta oligogyra | |
|---|---|
| Atlanta oligogyra | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Atlantidae |
| Genus: | Atlanta |
| Species: | A. oligogyra
|
| Binomial name | |
| Atlanta oligogyra Tesch, 1906
| |
Atlanta oligogyra is a species of sea snail, a holoplanktonic marine gastropod mollusk in the family Atlantidae.[1]
Description
(Original description in German) The shell, which is usually very small, is distinguished by an extremely diminutive spire. There are only 3 1/2 whorls in total. The body whorl is by far the largest and constitutes nearly the entire shell.
The shell is quite flat and features an oval aperture with a notch in the outer lip; while this notch is shallow, its edges diverge sharply toward the outside. Depending on the age of the shell, the relatively high keel penetrates more or less deeply between the whorls. As seen in other species, the point where the keel attaches is marked by a brown line, though it is less distinct than in Atlanta gaudichaudi.
The shell is entirely devoid of sculpture, though very fine growth lines are visible on the body whorl. Furthermore, no coloration is observable; the entire structure is glass-clear and transparent.
The maximum diameter of the shell is 2 mm, though most specimens are smaller.
The animal is equipped with a powerful proboscis (snout) and well-developed tentacles. It possesses a long, ribbon-like radula with 65 transverse rows. The spine of the central plate is very short—smaller than the lateral processes of the same plate. The intermediate tooth lacks an outer spine, and the lateral teeth, which are nearly equal in size, are hooked at the tips.[2]
Distribution
This marine species occurs off Indonesia.
References
- ^ Atlanta oligogyra Tesch, 1806. WoRMS (2009). Atlanta oligogyra Tesch, 1906. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2009) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=244554 on 14 August 2010 .
- ^ esch, J. J. (1906). Die Heteropoden der Siboga-Expedition. In: Weber M. (ed.) Uitkomsten op Zoologisch, Botanisch, Oceanographisch en Geologisch Gebied verzameld in Nederlandsch Oost-Indië 1899-1900 aan boord H.M. Siboga onder commando van Luitenant ter zee 1e. kl. G.F. Tydeman. Siboga-Expeditie Monographie 51 (Livraison 29) p.54-55 This article incorporates text from this source, which is in the public domain.
- Richter G. (1986). Zur Kenntnis der Gattung Atlanta (2). Atlanta lesueuri Souleyet und Atlanta oligogyra Tesch. (Prosobranchia: Heteropoda).. Archiv für Molluskenkunde 117(1-3): 19-32
External links
- Janssen, A.W. (2007). "Holoplanktonic Mollusca (Gastropoda) from the gulf of Aqaba, Red Sea and gulf of Aden (Late Holocene-Recent)". The Veliger. 49 (3): 140–195. Retrieved 27 December 2025.
- Janssen, A.W. (2007). "Holoplanktonic Mollusca (Gastropoda: Pterotracheoidea, Janthinoidea, Thecosomata and Gymnosomata) from the Pliocene of Pangasinan (Luzon, Philippines)". Scripta Geologica. 135: 29–177.