''Crassispira angulosa'' is an extinct
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
of
sea snail, a marine
gastropod mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...
in the
family
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
Pseudomelatomidae, the turrids and allies.
Worldwide Mollusc Species Data Base: ''Crassispira angulosa''
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Subspecies: † ''Crassispira angulosa acyensis'' (A.E.M. Cossmann, 1889) (synonym: ''Drillia (Crassispira) angulosa acyensis'' Cossmann, 1889)
Description
The length of the shell attains 6.8 mm.
Distribution
Fossils have been found in Eocene
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', " ...
strata in the Paris Basin
The Paris Basin is one of the major geological regions of France. It developed since the Triassic over remnant uplands of the Variscan orogeny (Hercynian orogeny). The sedimentary basin, no longer a single drainage basin, is a large sag in th ...
, France.
References
* Cossmann (M.), 1896 – Essais de Paléoconchologie comparée (2ème livraison), p. 1–179
* Cossmann (M.), 1902 – Catalogue illustré des coquilles fossiles de l'Éocène des environs de Paris (3ème appendice). Annales de la Société royale Malacologique de Belgique, t. 36, p. 9–110
Cossmann (M.) & Pissarro (G.), 1913 – Iconographie complète des coquilles fossiles de l'Éocène des environs de Paris, t. 2, p. pl. 46–65
External links
MNHN: ''Drillia angulosa''
Pacaud J.M. & Le Renard J. (1995). Révision des Mollusques paléogènes du Bassin de Paris. IV- Liste systématique actualisée. Cossmanniana. 3(4): 151–187
angulosa
Gastropods described in 1834
{{Pseudomelatomidae-stub