''Tubospirina'' is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of fossil

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

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 ...

s in the family

Craspedostomatidae ''Craspedostomatidae'' is an extinct taxonomic family of fossil sea snails, marine, gastropod mollusks in the subclass Gastropoda incertae sedis, unassigned in the class Gastropoda . Genera * † '' Brochidium'' Koken, 1889 * '' Bucanospi ...

. These snails were parasitic- carnivores. They lived in the

Silurian The Silurian ( ) is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the shortest period of the Paleozo ...

Period, Pridoli Age (from 418.7 ± 1.5 to 416 ± 2.8 mya).

Etymology

The genus name ''Tubospirina'' combines the Latin word ''tubus'', meaning "tube" and the genus name ''Spirina''.

Description

The genus ''Tubospirina'' is very similar to the genus ''Spirina'', but it can be distinguished by the dextrally coiled shell with a flatly arched upper side. The shells are large, with a wide aperture and a characteristic ornamentation of rounded costae and interspaces. This new genus has been tentatively placed close to the genus ''Spirina'' in the family

Species

* ''Tubospirina tubicina'' - Previously known as ''Spirina tubicina'' Perner, 1903Perner J. (1903, 1907, 1911). "Systéme silurien du center de la Bohéme". Vol. 4. Gasteropodes, Tome 1, 2, 3, Praha. - recombined as ''Tubospirina tubicina'' according to J. Frýda in 1998.

Etymology

Description

Species

Distribution

References

External links