Biology:Crassispira semicolon

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Short description: Extinct species of gastropod

Crassispira semicolon
Scientific classification edit
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Pseudomelatomidae
Genus: Crassispira
Species:
C. semicolon
Binomial name
Crassispira semicolon
(Sowerby I, 1816)
Synonyms
  • Crassispira (Crassispira) semicolon (Sowerby I, 1816)
  • Drillia (Crassispira) inflexa (Lamarck, 1850)
  • Pleurotoma inflexa Lamarck, 1850
  • Pleurotoma semicolon Sowerby I, 1816

Crassispira semicolon is an extinct species of carnivorous sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.[1]

Subspecies: † Crassispira semicolon chameryensis (de Boury, 1899) (synonym: † Pleurotoma chameryensis de Boury, 1899) [2]

Description

The length of the shell attains 24.6 mm; its diameter 8.3 mm. It lived from roughly the Eocene period 47.8 - 41.3 million years ago, before having a last known appearance 3.60 - 2.59 million years ago, during the Cenozoic period.

Distribution

Fossils have been found in Pliocene and Middle Eocene strata off Norfolk, Great Britain; also in the Paris Basin and the Loire Basin, France

References

  1. Worldwide Mollusc Species Data Base: Crassispira semicolon
  2. J.-M. Pacaud and J. Le Renard. 1995. Révision des Mollusques Paléogénes du Bassin de Paris. IV - Liste systématique actualisée. Cossmanniana 3(4):155-187
  • G.B. Sowerby I (1812-1822), The mineral conchology of Great Britain 1-4 (1-66), 793 pp. pls. 1-383
  • Tracey, S. and Jonathan A. Todd. "Nomenclatural changes for some Bracklesham Group gastropods." Tertiary Research 16 (1996): 41-54.

External links

Wikidata ☰ Q56278635 entry