Ctenoides

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Ctenoides
Rough file clam (Ctenoides scaber)

Rough file clam ( Ctenoides scaber )

Systematics
Subclass : Pteriomorphia
Order : Limida
Superfamily : Limoidea
Family : File clams (Limidae)
Subfamily : Liminae
Genre : Ctenoides
Scientific name
Ctenoides
Mörch , 1853
Rough file shell, inside and outside

Ctenoides is a shell - genus from the family limidae (Limidae). The oldest fossil representatives of the genus are known from the Upper Jura .

features

The equilateral, almost equilateral housings are slightly ovoid to rounded triangular in outline, and higher than long. The cases are only moderately curved, but can also be a bit flattened. They have a clear byssus opening on the front edge below the lock edge; the edges of the case are bent outwards in the area of ​​the byssus opening. The two "ears" (appendages) on either side of the vertebra are well separated from the body of the case. They are approximately the same size or the front "ear" is slightly smaller than the back ear . The edge of the lock is very narrow. There is a moderately large lateral tooth in the lock.

The ornamentation consists of numerous, tightly standing, radial ribs that can diverge towards the edge of the case. Here new ribs intervene in the gaps. The ribs are rounded at the top and are knotty or scaly.

Geographical distribution, habitat and way of life

The genus is distributed worldwide in all seas. The species of the genus live with byssus pinned to the underside of overhanging rocks or in crevices.

Taxonomy

The taxon was first described by Otto Andreas Lowson Mørch . The MolluscaBase lists the following species belonging to the genus:

supporting documents

literature

  • S. Peter Dance, Rudo von Cosel (arrangement of the German edition): The great book of sea shells. 304 p., Verlag Eugen Ulmer, Stuttgart, 1977 ISBN 3-8001-7000-0 (p. 239)
  • Rudolf Kilias: Lexicon marine mussels and snails. 2nd edition, 340 p., Verlag Eugen Ulmer, Stuttgart 1997 ISBN 3-8001-7332-8 (p. 85)
  • Raymond Cecil Moore (Ed.): Treatise on invertebrate paleontology. Mollusca, 6, Bivalvia 1. XXXVIII, 489 pp., New York, 1969 (pp. N386, fig. P. 388).

Individual evidence

  1. ↑ Otto Andreas Lowson Mørch (Mörch): Catalogus conchyliorum quae reliquit D. Alphonso d'Aguirra & Gadea Comes de Yoldi. Fasciculus secundus. Acephala. Annulata Cirripedia. Echinodermata. P. 1–74, Hafniae / Copenhagen, Klein, 1853 Online at www.biodiversitylibrary.org (P. 56)
  2. ↑ MolluscaBase: Ctenoides Mörch, 1853

Web links

Commons : Ctenoides  - collection of images, videos and audio files