Dallina
| Dallina Temporal range: | |
|---|---|
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| Dallina septigera, 23mm wide, recent | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Brachiopoda |
| Class: | Rhynchonellata |
| Order: | Terebratulida |
| Family: | Dallinidae |
| Subfamily: | Dallininae |
| Genus: | Dallina Beecher, 1893 |
| Species | |
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See text | |
Dallina is a genus of small to average size lampshells (maximum 35 millimetres or 1.4 inches 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.
Dallina septigera, brachial valve, 24mm long, near the Philippines
pedicle valve
anterior view
interior view
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 Hatai, 1940, recorded from Sea of Japan.
- Dallina eltanini 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).
- Dallina profundis Konjukova, 1957 (junior synonym of Glaciarcula spitzbergensis)
- Dallina raphaelis (Dall, 1970), recorded from off Japan.
- Dallina tasmaniaensis Verhoeff, 2023, southeastern Australia.
- Dallina triangularis Yabe & Hatai, 1934, recorded from off Japan and possibly Lau Ridge.
References
- ↑ Atkins, D. (1960). "A note on Dallina septigera (Lovèn), (Brachiopoda, Dallinidae)" (PDF). Journal of the Marine Biological Association of the United Kingdom. 3 (1): 91–99. doi:10.1017/s0025315400013126. Archived from the original (PDF) on 2014-11-29.
- ↑ Moore, R.C. (1965). Brachiopoda. Treatise on Invertebrate Paleontology. Vol. Part H., Volume 2. Boulder, Colorado/Lawrence, Kansas: Geological Society of America/University of Kansas Press. pp. H835. ISBN 0-8137-3015-5.
- ↑ "WoRMS - World Register of Marine Species - Dallina Beecher, 1893". www.marinespecies.org. Retrieved 2023-01-16.
- 1 2 3 4 5 6 7 8 Zezina, ON (2010). "Check-list of Holocene brachiopods annotated with geographical ranges of species". Paleontological Journal. 4: 1176–1199.
- ↑ Cooper, GA (1981). "Brachiopoda from the Gulf of Gascogne, France (Recent)". Smithsonian Contributions to Paleobiology. 44: 1–35.
- 1 2 3 Verhoeff, Tristan Joseph (2023). "New records and descriptions of recent Australian brachiopods (Terebratulida, Dallinidae and Aulocothyropsidae; and Rhynchonellida, Frieleiidae)". Australian Journal of Taxonomy. 11: 1–29.