''Dallina'' is a genus of small to average size lampshells (maximum long). It is known since the Miocene.

Description

Small to large, triangular to subquadrangular in outline; rectimarginate to paraplicate; beak erect, without beak ridges; foramen small to large, mesothyrid, attrite, symphytium concave. Hinge teeth small, weak; pedicle collar very short. Cardinalia lamellar with excavate inner and outer hinge plates separated by narrow crural bases; inner hinge plates converging on median septum to form V-shaped septalium; cardinal process not differentiated; median septum low anteriorly, extending beyond midvalve; adult loop teloform. File:Dallina septigera brachial.jpg, ''Dallina septigera'', brachial valve, 24mm long, near the Philippines File:Dallina septigera pedicle valve.jpg, pedicle valve File:Dallina septigera anterior.jpg, anterior view File:Dallina septigera internal 2.jpg, interior view File:Dallina septigera lateral.jpg, lateral view

Taxonomy

Nine extant species are recognized (though one has recently been synonymized), these are listed below: * '' Dallina septigera'' (Lovén, 1845), Type species of genus, from northeastern Atlantic. * ''

Dallina elongata ''Dallina'' is a genus of small to average size lampshells (maximum long). It is known since the Miocene. Description Small to large, triangular to subquadrangular in outline; rectimarginate to paraplicate; beak erect, without beak ridges; ...

'' Hatai, 1940, recorded from Sea of Japan. * ''

Dallina eltanini ''Dallina'' is a genus of small to average size lampshells (maximum long). It is known since the Miocene. Description Small to large, triangular to subquadrangular in outline; rectimarginate to paraplicate; beak erect, without beak ridges; ...

'' Foster, 1974, southern Pacific, near Antarctica. * '' Dallina floridana'' (Pourtalès, 1867), recorded from the Gulf of Mexico and Bahamas. * '' Dallina obessa'' Yabe & Hatai, 1934, recorded from Sea of Japan. * '' Dallina parva'' Cooper, 1981, recorded from northeast Atlantic (

Bay of Biscay The Bay of Biscay (), known in Spain as the Gulf of Biscay ( es, Golfo de Vizcaya, eu, Bizkaiko Golkoa), and in France and some border regions as the Gulf of Gascony (french: Golfe de Gascogne, oc, Golf de Gasconha, br, Pleg-mor Gwaskogn), ...

). * ''Dallina profundis'' Konjukova, 1957 (junior synonym of '' Glaciarcula spitzbergensis'') * '' Dallina raphaelis'' (Dall, 1970), recorded from off Japan. * ''

Dallina tasmaniaensis ''Dallina'' is a genus of small to average size lampshells (maximum long). It is known since the Miocene. Description Small to large, triangular to subquadrangular in outline; rectimarginate to paraplicate; beak erect, without beak ridges; ...

'' Verhoeff, 2023, southeastern Australia. * ''

Dallina triangularis ''Dallina'' is a genus of small to average size lampshells (maximum long). It is known since the Miocene. Description Small to large, triangular to subquadrangular in outline; rectimarginate to paraplicate; beak erect, without beak ridges; ...

'' Yabe & Hatai, 1934, recorded from off Japan and possibly Lau Ridge.

References

{{Taxonbar, from=Q3542846 Terebratulida Brachiopod genera Extant Miocene first appearances