Dallina

Dallina; Temporal range:
	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

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.

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[Atkins-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.

[Treatise-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.