Typhlocypris fossulata fossulata, RAUSCH & STOICA & LAZAREV, 2020

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 : 18

Typhlocypris fossulata fossulata n. ssp.

Fig. 12a-j

Description. The carapace is very large (close to 2mm) and has a trapezoidal shape in lateral view. The LV clearly overlaps the RV at both ends and the valve in general is remarkably asymmetrical. The RV of the adults has a short straight dorsal margin, slightly steeping towards the anterior. The antero-dorsal margin has a minor concavity at the point where it connects to the dorsal margin and is otherwise rounded. The posterior end is more pointed. The ventral margin is much longer than the dorsal one and almost straight with a wide spread concavity visible on the RV. The greatest width of the carapace is slightly behind mid-length. The surface of the valve shows no ornamentation. The muscle scar consists of a row of three scars with two smaller ones suited closely behind. One larger elongated scar lies above. The inner lamella is well developed in both the anterior-and the posterior end, even visible in juvenile stages. Dimension: L = 0,37 – 1,47 mm, H = 0,19 – 0,78 mm, the minimum sizes include juveniles too.

Remarks. Due to the large size and fragile character of the valve, it is difficult to find unbroken adult specimens. Therefore, most of the material identified is being represented by different juvenile stages that in general show a more sub-triangular rounded outline, especially the LV. It looks like other publications (e.g., Jiříček, 1985; Freels, 1980) also described juveniles stages (mainly A1) rather than adult specimens.

Chronostratigraphical and geographical distribution. Jiříček (1985) described the species from the upper Pannonian of the Vienna Basin in Austria, ČSSR and Yugoslavia. It has further been reported from several localities in Turkey, ranging from the upper middle Miocene to upper Miocene ( Freels, 1980).

Ecology. The living representatives of this genus occur globally in environments ranging from interstitial water of Australia ( Typhlocypris (T.) geratsi ) to cave environments in South Korea ( Typhlocypris (T.) marimotoi ) and the Holarctic ( Typhlocypris (P.) albicans ) ( Karanovic, 2005).