Dallina

Dallina
Temporal range: Miocene–Recent
Dallina septiger, 23mm wide, recent
Scientific classification
Kingdom: Animalia
Phylum: Brachiopoda
Subphylum: Rhynchonelliformea
Class: Rhynchonellata
Order: Terebratulida
Suborder: Terebratellidina
Superfamily: Terebratelloidea
Family: Dallinidae
Genus: Dallina
Beecher, 1893
species
  • D. septigera (Lovén, 1845) (type species) = Magellania septigera, M. septata, Japinithyris septata, Terebratula septata, Waldheimia septigera, W. septata[1]
  • D. elongata Hatai, 1940
  • D. eltanini Foster, 1974
  • D. floridana (Pourtalès, 1867)
  • D. obessa Yabe & Hatai, 1934
  • D. parva Cooper, 1981
  • D. profundis Konjukova, 1957
  • D. raphaelis (Dall, 1970) = Waltheimia raphaelis
  • D. triangularis Yabe & Hatai, 1934

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.

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]

References

  1. 1 2 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.
  2. ↑ Moore, R.C. (1965). Brachiopoda. Treatise on Invertebrate Paleontology. Part H., Volume 2. Boulder, Colorado/Lawrence, Kansas: Geological Society of America/University of Kansas Press. pp. H835. ISBN 0-8137-3015-5.
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