Crassispira semicolon is an extinct species of carnivorous sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.[1]
| Crassispira semicolon | |
|---|---|
Scientific classification 
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| 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)
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| Synonyms | |
| |
Subspecies: † Crassispira semicolon chameryensis (de Boury, 1899) (synonym: † Pleurotoma chameryensis de Boury, 1899) [2]
Description edit
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.
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Distribution edit
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 edit
- ^ Worldwide Mollusc Species Data Base: Crassispira semicolon
- ^ 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 edit
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