Amnicythere sp. 4

RAUSCH, LEA, STOICA, MARIUS & LAZAREV, SERGEI, 2020, A Late Miocene - Early Pliocene Paratethyan Type Ostracod Fauna From The Denizli Basin (Sw Anatolia) And Its Palaeogeographic Implications, Acta Palaeontologica Romaniae 16 (2), pp. 3-56 : 35-38

Amnicythere sp. 4

Fig. 23 i-o

Description. This species has a similar shape to A. sp. 3, but is slightly more elongated and narrower. The valve surface is covered by a similar but broader sized polygonal pattern. Secondary ornamentation is absent and the crests that separate the polygons appear thinner and sharper than in A. sp. 3. Conules pores are high and distributed randomly. A small spine is present, located close to the dorso-posterior margin. The anterior margin is broadly rounded and much higher than the posterior one.

Juvenile specimens have two tubercula in the posterior half of the valve. The hinge on the RV is made of a smooth median bar and elongated, divided teeth at the ends. A knot is present in the median area of the ventral margin. The inner lamella is well developed anterior- and posterior and continues along the ventral margin. Dimension: L = 0,44 – 0,47 mm, H = 0,21 – 0,24 mm, the minimum sizes include juveniles too.

Figures

Fig. 23a-h Amnicythere sp.3; a LV, external view, ♂; b, d, e LV, external view, ♀; c, f RV, external view, ♀; g LV, internal view, ♀; h RV, internal view, ♂; i-o Amnicythere sp. 4; i. LV, external view, ♂; j RV, external view, ♂; k LV, external view, ♀; l RV, external view, ♀; m RV, internal view, ♂; n LV, external view, A1 juvenile; o RV, external view, A1 juvenile; (all specimens from section A, samples 0 m – 35,5 m).