Cirpa borissiaki ( Moisseiev, 1926 )

Vörös, A., 2014, Early Jurassic brachiopods from diverse localities of northern Anatolia (Turkey), Fragmenta Palaeontologica Hungarica 31, pp. 7-49 : 17

Cirpa borissiaki ( Moisseiev, 1926)

(Figs 8–10)

*1926 Rhynchonella Borissiaki n. sp. – MOISSEIEV, Crimea, p. 971, 991, pl. XXVIII, figs 5–7.

1934 Rhynchonella borissiaki n. sp. – MOISSEIEV, Crimea and Caucasus, p. 45, 178 (pars), pl. II, figs 46–48, (non pl. III, figs 1–4).

1989 Cirpa borissiaki ( Moisseiev, 1934) – TCHOUMATCHENCO, Kotel I, p. 6, text-figs 2, 3, pl. VI, figs 1–5.

v 2011 Cirpa cf. borissiaki ( Moisseiev, 1934) – VÖRÖS & KANDEMIR, Eastern Pontides, p. 354, fig. 4/2.

Material – One moderately preserved specimen from Alacaatlı (Ankara area), Pliensbachian.

Measurements –

L W T Ch

INV 2014.94. 10.8 12.6 8.6 6.2 Remarks – This is a small Cirpa with high oval outline and somewhat “cynocephalous” lateral view. The uniplicate anterior commissure shows four narrowly spaced, sharp zig-zag deflections. The ornamentation consists of 8 to 9 regular ribs, which are weak on the posterior part and became very sharp anteriorly. C. borissiaki differs from C. fronto by its very narrow uniplication and that it has no anterior flattening. VÖRÖS & KANDEMIR (2011, l.c.) described this species and cited Moisseiev, 1934 as author. However, the correct date is 1926, since MOISSEIEV (1926, l.c.) properly described and figured the species borissiaki . So far, C. borissiaki was report- ed only from the Pliensbachian of the Pontian region (Crimea, Bulgaria, Turkey).