Samarella Polenova, 1952

Casier, Jean-Georges, Devleeschouwer, Xavier, Lethiers, Francis, Préat, Alain & Racki, Grzegorz, 2002, Ostracods and fore-reef sedimentology of the Frasnian-Famennian boundary beds in Kielce (Holy Cross Mountains, Poland), Acta Palaeontologica Polonica 47 (2), pp. 227-246 : 234

Genus Samarella Polenova, 1952

Type species: Samarella crassa Polenova, 1952 .

Samarella? minuta Casier and Lethiers , sp. nov.

Fig. 4K–N.

Derivation of the name: From the Latin minutus, small. Allusion to the small dimension of the carapace.

Holotype: Carapace. ( Fig. 4K, L). PG21. IRScNB n° b3778. L = 0.34 mm; H = 0.22 mm; W = 0.19 mm.

Type locality: Psie Górki section at Kielce, Holy Cross Mountains of Poland.

Material.—13 carapaces.

Diagnosis.— Samarella? minuta sp. nov. differs from other species of the genus in having an amplete and truncated circular outline, and a biconvex outline in dorsal view.

Description.—In lateral view, small, amplete and truncated circular carapace. Dorsal border gently arched. Ventral border regularly rounded. Anterior border slightly more rounded than the posterior one. The left valve overreaches the right one dorsally, and the dorsal border of the right valve is straight. Overlap along the free border indistinguishable. Maximum length at mid−height. Fine admarginal ridges. In dorsal view, regularly biconvex but more rounded posteriorly. Hinge line scarcely incised. Maximum width at mid−length, and at dorsal third of the height. Surface of valves smooth.

Remarks.—The species belongs questionably to the genus Samarella owing to the absence of a distinguishable overlapping along the free border.

Occurrence.— Samarella? minuta sp. nov. is presently only known from the late Frasnian of the Psie Górki section (PG5, PG11, PG14, PG20, PG21).