Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 21. 2003. (Budapest, 2003)

Genus Astacolus de MONFORT, 1 ! Astacolus budensis (HANTKEN, 1875) (Plate III: 10, Plate IV: 10) 1875a Marginulina budensis n. sp. — HANTKEN, S. 47, Taf. XIV, Fig. 5. 1875b Marginulina budensis — HANTKEN, p. 40, pl. XIV, fig. 5. 1962 Marginulina budensis — MAJZON, pl. XLII(XIV), fig. 5. 1982 Marginulina budensis (HANTKEN) — SZTRÁKOS, pl. 6, figs. 7a-b. Neotype — M.01.19. Type locality — Budapest, Újlak. Type level — Kiscell Clay Formation, Upper Kiscellian. Material — A single specimen. Dimensions — Length 2.3 mm, width 0.5 mm. Diagnosis — Test is elongate, ovate in section, flattened in both sides. Chambers are broad and low, they are arranged along a slighdy curved axis in the early growth stage. Sutures are distinct, strongly oblique to proloculus. The dorsal peripher}- is narrowed, the ventral one is rounded. Wall is calcareous, perforate, its surface is smooth. Aperture is radiate, its position is at the dorsal angle. Remarks — The morphology of this species suggests belonging to genus Astacolus (elongate test, ovate outline, slightly curved axis in early growth phase, strongly oblique sutures, radiate aperture at the dorsal angle). No specimen was found in the Hantken collections in Hungary. Stratigraphical range — HANTKKN had found only one specimen in the lower part of the Clavulina Szabói layers, Buda (Kis-Sváb-hegy) (HANTKEN 1875a-b), in the Buda Marl, Upper Eocene. Ecology — There are no data on its ecological characters. Astacolus complanatus (HANTKEN, 1868) (Plate V: 12) 1868 Cristellaria (Maginulind) complanata

— HANTKEN H, p. 90, pl. II, fig. 28. 1875a Marginulina complanata HANTKEN — HANTKEN, S. 45. 1875b Marginulina complanata HANTKEN — HANTKEN, p. 38. Dimension — About 0.4 mm (HANTKEN 1875a-b). Diagnosis — The very small test is flattened, ovate in section. The number of chambers is about eight, they are broad, low and arranged along a slightly curved line, the last chambers are uncoiled. Periphery is rounded. Sutures are slighdy curved. Wall is calcareous, perforate and smooth. Aperture is at the dorsal angle, it is not radiate (HANTKEN 1875). Remarks — The species belongs to Astacolus on the basis of the chamber arrangement and the slightly curved axis of the early growth stage. It differs from Marginulina because the test is flattened, ovate in section and the longitudinal costae are lacking. No specimen remained in the Hantken collections in Hungary. Stratigraphical range — This species is very rare in the upper part of the Clavulina Szabói layers (HANTKEN 1868, 1875a-b), Buda (Újlak), Kiscell Clay Formation, Upper Kiscellian. Astacolus indifferens (HANTKEN, 1875) (Plate III: 11, Plate IV: 11) 1875a Marginulina indifferens n. sp. — HANTKEN, S. 47, Taf. IV, Fig. 14. 1875b Marginulina indifferens— HANTKEN, p. 40, pl. IV, fig. 14. 1962 Marginulina indifferens HANTKEN — MAJZON, pi. XXXII(IV), fig. 14. 1973 Marginulina indifferens HANTKEN — NAGYNÉ GELLAI, p. 452. 1978 Marginulina indifferens HANTKEN — SZTRÁKOS, pl. 36, figs. 12a-b. 1979 Marginulina indifferens HANTKEN — SZTRÁKOS, pl. 13, figs. 12a-b. Neotype —M.99.71. Type locality — Budapest, on the left side of Danube, VIII/

1. borehole, 25 m. Type level — Kiscell Clay Formation, Cassidulina vitalisi zone, Upper Kiscellian. Material — One specimen. Dimensions — Length 1.2 mm, width 0.3 mm. Diagnosis — Test is elongate, ovate in section, laterally slightly flattened. Chambers are ordered along a slightly curved axis, they are broad and low, gradually increasing. Sutures are distinct, slightly curved. Peripheries are rounded. Wall is calcareous, finely perforate, not ornamented. Aperture is terminal, radiate, lying at the dorsal angle. Remarks — HANTKEN described this species on the base of a single specimen, having been not found in the Hantken Collections in Hungary. Stratigraphical range — This species is known from the Kiscellian in Hungary (HANTKEN 1875a-b, SZTRÁKOS 1978, 1979). Very rare. Ecology — The species may range from neritic to bathyal zone, in fine silty sediments.