Dallina is a genus of small to average size lampshells (maximum 35 millimetres or 1.4 inches long).[1] It is known since the Miocene.

Dallina
Temporal range: Miocene–Recent
Dallina septigera, 23mm wide, recent
Scientific classification
Kingdom:
Phylum:
Class:
Order:
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Superfamily:
Terebratelloidea
Family:
Genus:
Dallina

Beecher, 1893
Species

See text

Description

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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]


Taxonomy

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Nine extant species are recognized (though one has recently been synonymized),[3] these are listed below:

References

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  1. ^ 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.
  2. ^ 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.
  3. ^ "WoRMS - World Register of Marine Species - Dallina Beecher, 1893". www.marinespecies.org. Retrieved 2023-01-16.
  4. ^ a b c d e f g h Zezina, ON (2010). "Check-list of Holocene brachiopods annotated with geographical ranges of species". Paleontological Journal. 4: 1176–1199.
  5. ^ Cooper, GA (1981). "Brachiopoda from the Gulf of Gascogne, France (Recent)". Smithsonian Contributions to Paleobiology. 44: 1–35.
  6. ^ a b c 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.