Dallina

Dallina Temporal range: Miocene–Recent PreЄ Є O S D C P T J K Pg N

Dallina septigera, 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]

Dallina septigera, brachial valve, 24mm long, near the Philippines
pedicle valve
anterior view
interior view
lateral view

References

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.
↑ 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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