''Frenulina'' is an

extant Extant is the opposite of the word extinct. It may refer to: * Extant hereditary titles * Extant literature, surviving literature, such as ''Beowulf'', the oldest extant manuscript written in English * Extant taxon, a taxon which is not extinct, ...

genus of brachiopods, known from shallow waters in the warmer parts of the Pacific and Indian Oceans. Its shell is biconvex, rounded pentagonal in profile, and dependent on the species scarlet with creamy white radiating stripes of quickly varying width, beige or seldom entirely white. It lives attached by a stalk to a hard underground.

Species and distribution

* ''Frenulina sanguinolenta'' has creamy white radiating stripes of quickly varying width on a scarlet shell, or is very rarely entirely white. It is very common in the western Pacific, including Australia, New Caledonia, French Polynesia, Philippines, China, Japan and Hawaii, but also occurs in the Indian Ocean. * ''F. cruenta'' is known from the Indian Ocean. * ''F. mauiensis'' occurs in Hawaii. File:Frenulina sanguinolenta pedical valve.jpg, ''Frenulina sanguinolenta'', pedicle valve, 11mm File:Frenulina sanguinolenta brachial.jpg, brachial valve File:Frenulina sanguinolenta lateral.jpg, lateral view

References

{{Taxonbar, from=Q3543803 Brachiopod genera Terebratulida