Gibbirhynchia cf. muirwoodae Ager, 1954

Vörös, A., 2014, Early Jurassic brachiopods from diverse localities of northern Anatolia (Turkey), Fragmenta Palaeontologica Hungarica 31, pp. 7-49 : 30

Gibbirhynchia cf. muirwoodae Ager, 1954

(Figs 51–53, 54–56)

* 1954 Gibbirhynchia muir-woodae sp. nov. – AGER, Gibbirhynchia , p. 40, pl. 1, figs 5, 6.

1962 Gibbirhynchia muirwoodae Ager. – AGER, British Rhynchonellidae , p. 99, text-fig. 60, pl. VIII, fig. 8.

Material – Six variously preserved specimens from Günüviran (Bilecik area), Yakacik, Kösrelik Kızığı and Alacaatlı (Ankara area), Upper Sinemurian to Pliensbachian. Measurements –

Remarks – This medium-sized Gibbirhynchia differs from G. curviceps ( Quenstedt, 1856) in the lower degree of convexity of its valves and in some features what approach to the genus Tetrarhynchia , e.g. the shape of the fold and the costation. Considering the illustrations given by AGER (1954, l.c. and 1962, l.c.), our specimens seem to show the greatest similarity to G. muirwoodae from among the many species of Gibbirhynchia . G. muirwoodae was recorded from the upper Pliensbachian of the NW-European region and Turkey.