Volutharpa
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Family: Tudiclidae
Genus: Volutharpa
Species

See text

Volutharpa is a genus of sea snails, marine gastropod mollusks in the family Buccinidae, the true whelks.[1]

Description

The thin shell is ventricose, thin. The spire is short. The body whorl and the aperture are very large. The operculum is usually wanting, but, when present, at first with apical nucleus, afterwards becoming annular.[2]

(Described as Pseudobuccinum) The thin shell is oval and ventricose. The spire is very short. The body whorls is large, not produced below. The aperture is large, terminating below in a rounded sinus. The outer lip is thin and simple. The inner lip is very thin, smooth, and closely and very broadly folded upon the imperforate umbilical region and body whorl above, so as to form, with a low revolving umbilical ridge, a kind of profoundly arcuate, strongly spiral, false columell. The surface shows more or less distinct revolving lines and furrows.

This genus differs in its simple foot and in possessing eyes as well as in dentition. The form and porcellaneous texture of the shell are like Bullia, and serve to separate it from Buccinum.

The animal is like Buccinum, of a white color sparsely sprinkled with black on the head, foot and siphon; the tentacles are broad, close together at the base, and rather short, with the eyes on the outer side, near the middle; the siphon is thick and short, and the foot is fleshy and simple behind.[2]

Distribution

This genus is confined in distribution to the North Pacific Ocean, mainly off Japan and Alaska.

Fossils have been found in Pliocene and Quaternary strata of Japan and in Quaternary strata of California, USA.

Species

Synonyms
  • Volutharpa ainos Kuroda & Kinoshita, 1956: synonym of Volutharpa perryi ainos Kuroda & Kinoshita, 1956
  • Volutharpa deshayesiana P. Fischer, 1856: synonym of Volutharpa ampullacea (Middendorff, 1848)
  • Volutharpa fischeriana A. Adams, 1870: synonym of Volutharpa perryi (Jay, 1857)
  • Volutharpa limnaeana A. Adams, 1860 (nomen nudum)
  • Volutharpa morchiana P. Fischer, 1859: synonym of Buccinum baerii (Middendorff, 1848)
  • Volutharpa paulucciana Tapparone Canefri, 1882: synonym of Volutharpa perryi (Jay, 1857)
  • Volutharpa salmiana Rolle, 1892: synonym of Volutharpa perryi (Jay, 1857)

References

  1. ↑ MolluscaBase eds. (2023). MolluscaBase. Volutharpa P. Fischer, 1856. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=490589 on 2023-07-03
  2. 1 2 G.W. Tryon (1880-1881) Manual of Conchology III, Academy of natural Sciences, Philadelphia
  • L. V. Titova. 1994. Cenozoic history of Turritelloidea and Buccinoidea (Mollusca: Gastropoda) in the North Pacific. Palaeogeography, Palaeoclimatology, Palaeoecology 108:319-334
  • Yamazaki, T.; Sonoda, T.; Nobetsu, T.; Goshima, S. (2018). Contribution to the knowledge of the taxonomy of the Japanese species of Volutharpa (Gastropoda: Buccinidae). Venus. 76(1-4): 1–18.
Wikimedia Commons has media related to Volutharpa.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.