''Pseudoscilla bilirata'' is a species of

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 ...

, a

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 in the family Pyramidellidae, the pyrams and their allies.

Description

The length of the shell varies between 1.5 mm and 2 mm. Like most Pyramidellidae, the shell is white. Protruding

dextral Sinistral and dextral, in some scientific fields, are the two types of chirality ("handedness") or relative direction. The terms are derived from the Latin words for "left" (''sinister'') and "right" (''dexter''). Other disciplines use different ...

ridges spiral up the shell's opening to the tip. The opening lip of the shell is ridged.

Distribution

This marine species occurs on the Atlantic coast of Africa, from Morocco in the north to Angola in the south. It also occurs on the

Canary Islands The Canary Islands (; es, Canarias, ), also known informally as the Canaries, are a Spanish autonomous community and archipelago in the Atlantic Ocean, in Macaronesia. At their closest point to the African mainland, they are west of Morocc ...

Madeira ) , anthem = ( en, "Anthem of the Autonomous Region of Madeira") , song_type = Regional anthem , image_map=EU-Portugal_with_Madeira_circled.svg , map_alt=Location of Madeira , map_caption=Location of Madeira , subdivision_type=Sovereign st ...

and the Savage Islands, but it does not occur in

Cape Verde , national_anthem = () , official_languages = Portuguese , national_languages = Cape Verdean Creole , capital = Praia , coordinates = , largest_city = capital , demonym ...

and

São Tomé and Príncipe São Tomé and Príncipe (; pt, São Tomé e Príncipe (); English: " Saint Thomas and Prince"), officially the Democratic Republic of São Tomé and Príncipe ( pt, República Democrática de São Tomé e Príncipe), is a Portuguese-speaking i ...

.Peñas A. & Rolán E. (1999).
La familia Pyramidellidae Gray, 1840 (Mollusca, Gastropoda, Heterostropha) en Africa occidental. 6. El género Pseudoscilla Boettger, 1901
'. Iberus, 17(2): 11-26

References

External links

To Biodiversity Heritage Library (1 publication)

To CLEMAM

To Encyclopedia of Life
* Pyramidellidae Gastropods described in 1870 Molluscs of the Atlantic Ocean Gastropods of Africa Molluscs of the Canary Islands Molluscs of Madeira {{Pyramidellidae-stub