Английская Википедия:Dallina
Шаблон:Short description Шаблон:Italic title Шаблон:Taxobox
Dallina is a genus of small to average size lampshells (maximum Шаблон:Convert long).[1] 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.[2]
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Dallina septigera, brachial valve, 24mm long, near the Philippines
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pedicle valve
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anterior view
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interior view
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lateral view
Taxonomy
Nine extant species are recognized (though one has recently been synonymized),[3] these are listed below:
- Dallina septigera (Lovén, 1845), Type species of genus, from northeastern Atlantic.[4]
- Dallina elongata Hatai, 1940, recorded from Sea of Japan.[4]
- Dallina eltanini Foster, 1974, southern Pacific, near Antarctica.[4]
- Dallina floridana (Pourtalès, 1867), recorded from the Gulf of Mexico and Bahamas.[4]
- Dallina obessa Yabe & Hatai, 1934, recorded from Sea of Japan.[4]
- Dallina parva Cooper, 1981, recorded from northeast Atlantic (Bay of Biscay).[4][5]
- Dallina profundis Konjukova, 1957 (junior synonym of Glaciarcula spitzbergensis[6])
- Dallina raphaelis (Dall, 1970), recorded from off Japan.[4]
- Dallina tasmaniaensis Verhoeff, 2023, southeastern Australia.[6]
- Dallina triangularis Yabe & Hatai, 1934, recorded from off Japan and possibly Lau Ridge.[4][6]
References
