Brachiopoda : Laqueus

Laqueus


Sous-embranchement (subphylum) des Rhynchonelliformea Classe des Rhynchonellata Ordre des Terebratulida Sous-Ordre des Terebratellidina Super-famille des Laqueoidea

Genus Laqueus Dall, 1970

[Type species= Laqueus erythaeus Dall, 1920 (p. 123)]

Medium to large, variably ovate, subpentagonal to ligate, biconvex, smooth; anterior commissure rectimarginate; beak low, erect, with distinct beak ridges, foramen medium, mesothyrid to permesothyrid; either symphytium or conjunct deltidial plates. hinge teeth with ventrally recessive dental plates; pedicle collar sessile. cardinalia with inner and outer hinge plates separated by crural bases; inner hinge plates uniting with median septum to form septalium; cardinal process a very short, transverse myophore; mantle canals spiculate; adult loop bilateral.

Miocene-Present

Diagnosis from volume 5 of the
Treatise on Invertebrate Paleontology (2006)

Extant Species of Laqueus

L. erythraeus Dall 1920
L. rubellus (Sowerby, 1846)
L. suffusus (Dall, 1870)
L. jeffreysi Dall, 1877
L. blanfordi (Dunker, 1882)
L. vancouveriensis Davidson, 1887
L. morsei Dall, 1908
L. quadratus Yabe et Hatai, 1934
L. proprius Yabe et Hatai, 1934
L. orbicularis Yabe et Hatai, 1934
L. concentricus Yabe et Hatai, 1936
L. pacifica Hatai, 1936
L. pallidus Hatai, 1939
Diagnosis

Diagnosis

FIGURES : Laqueus

Geographic distribution

Laqueus erythraeus Dall, 1920

Type locality: Santa Catalina (California, USA)
Depth range: 2285 - 2342 m

Laqueus californianus [or L. californicus] : the specimens recorded in California, USA (see Mackinnon & Long, 2000)

Diagnosis in preparation -

Laqueus vancouveriensis Davidson, 1887

Type locality: off Vancouver Island (British Columbia, Canada)
Depth range: 110 - 2342 m

Laqueus californianus [or L. californicus] : the specimens recorded in Washington State and Alaska (USA), in British Colombia (Canada) (see Mackinnon & Long, 2000)

Diagnosis in preparation -