Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 62. (Budapest 1970)

Nagy, I. Z.: Lower Liassic molluscs from the Mts. Mecsek, Hungary

Research history oï the fauna The productive coal beds have soon evoked the attention of research workers. PETERS (1862) has the first to report on the fauna of the coal sequence. HERTLE (1873) mentions some molluscs from the accessory rocks of beds 15, 17, 22. On the basis of very rare cephalopods found in coal groups, STTJR (1887) dates the fossils to the period between the Buckland and Oxynotus zones. KLEIDORFER also discusses, in his work valuable mainly from the point of view of mining geology, the faunal elements; the recognition and description of the faunal banks are also his merit. VADÁSZ (1935) also discussed extensively the area under investigation, submitting a comprehensive i'aunistie list (published also in his Geology of Hungary, second ed., 1966, j). 142). Practice has long since demanded the publication of certain faunal information, or "identification books". This claim produced mainly manuscript I realises, of which M. FÖLDJ/S (1952) MS fauna! identification is of exceptional worth. The first volume, summarizing the latest investigations concerning the area, was published in 1969, edited by E. NAOY, containing, beside historical dala, also a summary of the paleogeographic, geological, geochcmical, geophysical, and palynological results (F. NAGY, ed., 1969). Description oï the fauna Class: Scaphopoda BRONN, 1852; Fam.

: Dentaliidae CRAY, 1834; Genus: Denlalium LINNÉ, 1758; Subgenus: Dentalium (Anlalis) II. ADAMS & A. ADAMS, 1854. (Non Dentale DA COSTA, 1778; nec Antalis HERMANN sen., 1846; D. entalis LINNÉ, 1758 = Entalis GRAY, 1847; non SOWERBY, 1839; Entaliopsis NENTON & FIARRTS, 1894). Dentalium (Ántalis) äff. etalense TERQUEM & PIETTE. Examined material:?) stone molds partly with shells, in black marl; 9, 12, 19 mm long, diameter below 1 mm. Máza, from shale dump, M 69.357. Remarks: The shell fragments arc rather worn. The brownish gray colour of the former shell is well visible but the shell structure or sculpture is indiscernible. One of the specimens displays a longitudinal furrow, thus resembling the species D. limaiuloides KUHN. However, this fissure may also have a mechanic or tectonic origin. Two exemplars show a slight curvature of the tubes. The curvature of the shelles reaches the grade of D. parvulum RICHARDSON, but it is essentially more slender. Thus its habit stands nearest to that of D. etalense (RICHARDSON, 1901); PI. 45, Figs. 14, 15), though RICHARDSON'S specimens are of a rather straight type. The cavernulous tubules are usually indented in the area of the aperture. Class: Gastropoda; Superfam.: Fuoinplinlaeca mo KÖNINCK, 1881; ham.: Eotoiiinriidnc YYENZ, 1938; Subi'am.: Ptychomphalinac WENZ, 1938; Genus: Ptyehomphalus AGASSIZ, 1839. Ptychomphalus rotellaeformis (DUNKTCR) 1907 Crijptacnia rotellaeformis DUNKER, — STEUERET?, Pleurolomaricn, p. 24, PI. 2, Fig. 4. Examined material: fragment of a specimen, partly with shell. Diameter 21 mm, height from umbilicus to apex 7 mm. Mecsekszabolcs. .1. Ferenc shall (collected by BocKir jam, 187.'!). Ilellanginn, coal group. M 69.368. Remarks: The apex is low, hence the specimen is rather flat. The sutural lines are sharp, decurrent on the ultimate whorl (largely in its middle) into an obtuse