Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 20. 2002. (Budapest, 2002)

Small foraminifera species, described by HANTKEN 37 Ecology — Tritaxilina hantkeni is an epifaunal fom, in normal marine environment (MURRAY 1973, 1991). attached to hard substrates and feeding on suspension It is typical in cold water, bathyal sediments. Order Miliolida DELAGE & HÈROUARD, 1896 Superfamily Cornuspiracea SCHULTZE, 1854 Family Cornuspiridae SCHULTZE, 1854 Subfamily Cornuspirininae SCHULTZE, 1854 Genus-.Cornuspira SCHULTZE, 1854 Cornuspira ci. olygogyra HANTKEN, 1875 (Plate I: 12, Plate II: 12) 1875a Cornuspira olygogyra — HANTKEN, S. 20, Taf. I, Fig. 10. 1875b Cornuspira olygogyra — HANTKEN, p. 16, pl. I, fig.. 10. 1935 Cornuspira olygogyra HANTKEN — CUSHMAN, p. 15, pi. 4, fig. 14. 1962b Cornuspira olygogyra HANTKEN — MAJZON, pi. XXIX(I), fig. 10. Diagnosis — The test is discoidal. The proloculus is spherical, the second chamber is undivided and planispirally enrolled to four to five whorls tube-like and evolute. The wall is calcareous, porcelaneous and imperforate. The surface is smooth. The aperture is terminal at the open end of the tube. Material — One specimen from Pilisborosjenő, brickyard, Kiscell Clay Formation, Upper Kiscellian. Dimensions — Diameter 1 mm. Remark — No specimen remained in the Hantken Collections in Hungary. I have found only a single similar specimen in the Kiscell Clay. Stratigraphical range — It is very rare, HANTKEN (1875a, b) found this species in Budapest (Buda, Krisztinaváros, brickyard) in Kiscell Clay, Lower Oligocène. It is known also from Jackson Formation (USA), Upper Eocene (CUSHMAN, 1935). Ecology — It is a normal marine, shelf dweller taxon, preferring cold water. The occurrence in the batyhal sediments may be allochtonous. Suborder Miliolina DeLage & HÈROUARD, 1896 Superfamily Miliolacea EHRENBERG, 1839 Family Hauerinidae SCHWAGER, 1876 Subfamily Miliolinellinae VELLA, 1957 Genus Triloculina D'ORBIGNY, 1826 Triloculina porvaensis HANTKEN, 1875 (Plate I: 13, Plate II: 13) 1875a Triloculina porvaensis n. sp. — HANTKEN, S. 21, Taf. XIII, Fig. 3. 1875b Triloculina porvaensis — HANTKEN, p. 76, pl. XIII, fig. 3. 1962b Triloculina porvaensis HANTKEN — MAJZON, pi. XLI(XIIL), fig. 3. 1970 Triloculina porvaensis HANTKEN — Le CALVEZ, p. 52, pi. 13, fig. 11. 1970 Triloculina porvaensis HANTKEN — NYÍRŐ, p. 71, pl. I, fig. 9. 1975 Triloculina porvaensis HANTKEN — BRAGA & GRÜNIG in BRAGA et al., p. 104. 1988 Triloculina porvaensis HANTKEN — HORVÁTH-KOLLÁNYI, p. 58, pi. VTU, figs 4-5. 1999 Triloculina porvaensis HANTKEN — OZSVÁRT, p. 87, pi. 2, fig.4. Neotype — M.99.49. Type locality Csordakút, Csordakút-2. brickyard, Csolnok Formation, Middle Eocene. Material — Two specimens from OZSVÁRT (1999). Dimensions — Length 1.4-1.7 mm, width 0.5-0.6 mm, and thickness 0.7 mm. Diagnosis — The test is ovate in outline and equilaterally triangular in section. The chambers are one to half whorl long. The early growth stages are not preserved the available part is triloculine. Only three chambers are visible from the exterior. The wall is calcareous, porcelaneous and imperforate. The surface is ornamented by longimdinal costae. The aperture is rounded and having a short bifid tooth at the end of the final chamber. Remark: — HANTKEN (1875a, b) found one specimen in the Porva Marl (today Padrag Marl Formation), in the lowermost part of the Clavulina Szabói layers (HANTKEN 1875a, b). Stratigraphical range — In Hungary it is known only in Middle Eocene from the Transdanubian Mountains localities (Nagyesztergár, EXtdar, Csordakút; NYÍRŐ 1970; HORVÁTH-KOLLÁNYI 1988; OZSVÁRT 1999). In Europe it is known from the Middle Eocene in the Paris Basin (Le CALVEZ 1970), and from the Upper Eocene sediments in Possagno (BRAGA & GRÜNIG in BRAGA et al. 1975). Ecology — It is an epifaunal, marine, temperate or warm, euhalin species, Hving in upper bathyal sediments.