Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 19. 2001. (Budapest, 2001)
26 Fózy, were collected from. The most likely is that they were collected from one of the quarries situated north of the Road No. 84, in the vicinity of the town. Today these pits are used as garbage dumps, thus the possibility of further collecting is limited. A search in the local museum of Sümeg, where numerous fossils collected by L. KOCSIS are housed, was unsuccessful: only one additional, poorly preserved Late Cretaceous ammonite, insufficient for precise determination was found. I. Cephalopods described below contain moderately well preserved internal moulds. Some of them are fully septate phragmocones, others bear part of the body chamber. Some specimens are slighdy to strongly deformed. The inner whorls are poorly preserved and the suture lines are commonly corroded. Some of the ammonites are strongly subsolved on one side. Systematics Abbreviations used in the measurements: D — diameter WH = whorl-height WW = whorl-width U = diameter of umbilicus All data (or the first ones, in the cases of more than one measurements on the same specimens) refer to dimensions measured at the maximal diameter of the specimen in millimetres. Phylum Mollusca CUVIER, 1797 Class Cephalopoda CUVIER, 1797 Order Ammonoidea ZETTEL, 1884 Suborder Phylloceratina ARKELL, 1950 Family Phylloceratidae ZlTTEL, 1884 Subfamily Phylloceratinae ZlTTEL, 1884 Genus Hypophy/kceras SALFELD, 1924 Hypophylloceras sp. (Plate I: 1-2) Material — A single specimen only. Measurements: D WH WW U M.63.1357 155 — 34 — Description — The relatively large, discoid, fully septate mould is slighdy corroded on both sides. The coiling is very involute, the umbilicus is not seen, the flanks are flat, the venter is rounded. No ornamentation is preserved, the suture line is strongly subsolved, but seems to be rather complex, which is typical for the phylloceratids. Remarks — Although phylloceratids are rare in the uppermost Cretaceous, there are related species occurring worldwide. Most of these forms are poorly known, without any information on the intraspecific variability. As a consequence, the Sümeg specimen is difficult to determine on species level due to the poor state of preservation. The lack of the characteristic falcoid constrictions clearly separates the specimen from the otherwise similarly built Upper Cretaceous desmoceratids (Desmophyllites) . Suborder Ammonitina HYATT, 1889 Family Pachydiscidae SPATH, 1922 Genus Pachydiscus ZlTTEL, 1884 Remarks — Pachydiscidae are moderate-sized to large, important ammonites of early Albian to late Maastrichtian age with a word-wide occurrence. The earliest forms (Eopachydiscus) suggest desmoceratid origin (KENNEDY 1983). The abundance of the family has a peak in the Coniacian to Campanian. Pachydiscus and related taxa are typical for the Campanian to Maastrichtian. Explanation to Plate I 1—2 Hypophylloceras sp. (M.63.1357), x 1. — Fully septate specimen; ventral and lateral view. 3 Pachydiscus cf. precolHgatus COLLIGNON, 1955 (M. 63.1360/1), x 1. — A supposed microconch, with a part of the adult body chamber. The end of the phragmocone is not recognisable; lateral view. 4 Pachydiscus cf. precolHgatus COLLIGNON, 1955 (M. 63.1345/6), xl. — Fully septate, deformed fragment; lateral view.
