Anadara adamsi

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Anadara adamsi
Systematics
Order : Aroida
Superfamily : Arcoidea
Family : Ark clams (Arcidae)
Subfamily : Anadarinae
Genre : Anadara
Type : Anadara adamsi
Scientific name
Anadara adamsi
Olsson , 1961

Anadara adamsi is a type of clam from the family of ark clams (Arcidae).

features

The unevenly hinged, heavily expanded case is approximately rhomboidal in outline with a maximum length of 30 mm. The left flap is slightly larger and overlaps the right flap. It is strongly unequal, the rear part is greatly elongated. The vertebrae , curled slightly forward, sit well in front of the midline. The dorsal edge is straight, the corners to the front and rear edges are pointed. The rear edge is slightly arched and sloping outwards to the longitudinal axis of the case. The transition to the ventral margin is tightly rounded. The front edge is well rounded. A distinct keel extends from the vertebra to the posterior end of the ventral margin. The ligament lies essentially behind the vertebrae. The dorsal field is narrow-lanceolate, it has one to three, angular pits. The lock bar has 15 teeth in the front part and 21 to 24 teeth in the rear part. The rear teeth in particular become longer towards the outside and are then increasingly sloping towards the outside.

The skin is whitish and shiny. The ornamentation consists of 28 to 30 ribs, which are slightly wider on the left flap than on the right flap. The ribs are slightly knotty in the rear part of the case and in the area of ​​the vertebrae, especially on the left flap. The periostracum is light brown to dark brown with rare, pointed bristles that are distributed over the entire surface. The inside edge of the case is notched, the notches match the ribs on the outside.

Geographical distribution and habitat

The distribution area of ​​the species extends on the American west coast from Punta Santa Inés, Baja California ( Mexico ) (27.9 ° N) to Salinas , Santa Elena Province (formerly Guayas), Ecuador (2.2 ° S).

The animals live in shallow water at a depth of around 8 to 54 meters.

Taxonomy

The species was established by Olsson in 1961 in the combination of Anadara (Diluvarca) adamsi . It is recognized as a valid taxon. Diluvarca Woodring, 1925 is considered a synonym by Anadara Lamarck, 1809.

supporting documents

literature

  • Eugene V. Coan, Paul Valentich-Scott: Bivalve Seashells of Tropical West America marine Bivalve mollusks from Baja california to Northern Perú. Part 1,598 pp., Santa Barbara Museum of Natural History, Santa Barbara 2012 ISBN 978-0-936494-43-2 (p. 169)

Individual evidence

  1. ↑ Axel Adolf Olsson: Mollusks of the tropical Eastern Pacific. Particularly from the southern half of the Panamic-Pacific faunal province (Panama to Peru). Panamic-Pacific Pelecypoda. Paleontological Research Institution, 1-574 pp., 86 Taf., Ithaca, New York, 1961 Online at www.biodiversitylibrary.org (p. 90) Taf. 6, Fig. 7,7a
  2. ↑ MolluscaBase: Anadara adamsi Olsson, 1961
  3. ↑ MolluscaBase: Diluvarca Woodring, 1925