Dallina

Dallina Temporal range: Miocene–Recent PreЄ Є O S D C P T J K Pg N
File:Dallina septiger internal 1.jpg
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 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). 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.jpg

  Dallina septigera, brachial valve, 24mm long, near the Philippines

• Dallina septigera pedicle valve.jpg

  pedicle valve

• Dallina septigera anterior.jpg

  anterior view

• Dallina septigera internal 2.jpg

  interior view

• Dallina septigera lateral.jpg

  lateral view