Dallina

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:
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

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
gollark: .goose rectangular
gollark: .goose square
gollark: .goose triangular
gollark: .gptj ./node_modules
gollark: The opposite of football is clearly ominous houses in jungles.

References
  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. Part H., Volume 2. Boulder, Colorado/Lawrence, Kansas: Geological Society of America/University of Kansas Press. pp. H835. ISBN 0-8137-3015-5.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.