Zeilleria cf. mutabilis ( Oppel, 1861 )

Vörös, A., 2014, Early Jurassic brachiopods from diverse localities of northern Anatolia (Turkey), Fragmenta Palaeontologica Hungarica 31, pp. 7-49 : 39

Zeilleria cf. mutabilis ( Oppel, 1861)

(Figs 95–97)

* 1861 Terebratula mutabilis Opp. ( Waldheimia .) – OPPEL, Brachiopoden des unteren Lias, p. 538, pl. X, fig. 7.

v 2009 Zeilleria mutabilis ( Oppel, 1861) – VÖRÖS, Bakony, p. 183, text-figs 110, 111, pl. XXVIII, figs 5, 6 (cum syn.).

v 2014 Zeilleria cf. mutabilis ( Oppel, 1861) – VÖRÖS, Yakacik, p. 244, pl. II, fig. 8 .

Material – Five rather well-preserved specimens from Kösrelik Kızığı (Ankara area), loose from Upper Sinemurian to Pliensbachian interval .

Measurements –

L W T Ch

INV 2014.123. 14.2 13.7 6.7 – Remarks – This species is one of the most frequently illustrated and best known Alpine Early Jurassic zeilleriid. Recently VÖRÖS (2009) gave a detailed external and internal morphological description and discussion of Z. mutabilis . Externally, it is easy to recognize by its very simple but constant morphology (subpentagonal outline, moderately flat valves, straight commissures, erect to slightly incurved beak), and on the basis of these features, the identification of our specimens seems to be justified. Z. mutabilis is frequent in the Sinemurian and Pliensbachian of the Alpine-Mediterranean region, but occurs also in North Africa, the Balkans and Turkey; therefore, it tends to be cosmopolitan in distribution.