Creseis virgula constricta [ Status Unaccepted]   Chen & Be,  1964 (Tusk Shell)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Mollusca
Class: Gastropoda
Order:Thecosomata
Family:Creseidae

Image copyrights: ETI. World Biodiversity Database

Description
Size: The holotype is 3.5 mm long, 0.38 mm wide. The protoconch is 0.54 mm long and 0.12 mm wide.

The shell is smooth except for some growth lines. The cross section of the shell is circular. It is conical and straight or slightly curved. A well defined constriction separates the protoconch from the adult portion of the shell; the protoconch has a distinct bulge. there is a gentle size increase towards the anterior part of the adult shell. The posterior end is round and brown.
In juveniles the Creseis virgula constricta protoconch is narrow but blunt at its tip. First it grows narrow then bulges outwards so that the anterior part of protoconch I is wide. Before the protoconch II and teleoconch are formed, a narrow constriction occurs.

It is a protandric hermaphrodite.


Synonym (s)

Common Name (s)
Economic Importance and Threats

Ecology

Biogeography


• Andaman Sea INDIA (Record: 05/2000)

Literature Source(s)
  • Bhattacharjee, D (2005) Pteropod preservation profiles in seabed sediments off Middle Andaman Island in Andaman Sea Indian Journal of Marine Sciences CSIR 34(3) 259-266 Available at - http://nopr.niscair.res.in/handle/123456789/1561
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • van der Spoel, S; Newman, LJ and Estep, KW Pelagic molluscs Marine Species Idenification Portal Available at - http://www.species-identification.org/species.php?species_group=pelagic_molluscs&menuentry=colofon

Page last updated on:2012-10-18

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