Amnicythere aff. pediformis ( Schornikov, 1966 )

Rausch, Lea & Stoica, Marius, 2019, AN EARLY PLEISTOCENE ANOMALOHALINE WATER OSTRACOD FAUNA FROM LAKE DEPOSITS OF THE HOMO ERECTUS-BEARING KOCABAŞ LOCALITY (SW TURKEY), Acta Palaeontologica Romaniae 15 (2), pp. 41-69 : 61

Amnicythere aff. pediformis ( Schornikov, 1966)

1966a Leptocythere pedi- - Schornikov, pp. 33-35, formis text-fig. 2.

2005 Leptocythere sp. 2 - Boomer et al.: pl. 1, fig. 13.

2010 Amnicythere pedi- - Boomer et al., p. 129, formis pl. 1, fig.13. ( Schornikov,1966)

Tarasov, 1996

Description. The carapace has an elongated shape and an almost straight dorsal margin that runs parallel to the slightly sinuous ventral margin. The carapace is covered by a fine to regular punctuation that gets slightly coarser in the postero-ventral region and decreases in size towards all margins. In the central part of the valve the punctuation tends to run more or less parallel and is being separated by fine crests that tend to be more visible within the median area. Females show a coarser reticulation towards the posterior end and a slight posteroventral swelling. Close to the anterior end, that is broadly round- ed, several small tubercles (pore-conuli) can occur. Dimension: l = 0, 58 – 0, 63 mm, h = 0, 26- 0, 30 mm.

Remarks. The species shares similarities with Leptocytere nata (Marcova) , however the original drawing of the holotype does not allow a proper comparison. The Yassini (1986) illustrated specimen, referred to as Leptocythere nata Markova , shows a similar kind of ornamentation though it appears much finer. Leptocythere gorganensis Yassini bears a similar ornamentation as our species but appears to be more pointed posteriorly. Leptocythere casusa Markova in Agalarova et al., 1961 closely resembles our specimen, although the ornamentation net exposes more polygonal aspects. Amnicythere stepanaitysae (Sheneider) is similar, but according to the original description, possess one elongated tubercula in the postero-ventral area.

Ecology. The species occurs in contemporaneous deposits within the Caspian Sea ( Boomer et al., 2005) and Pleistocene to recent assemblages of the Black Sea ( Boomer et al., 2010).