Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 19. 2001. (Budapest, 2001)

Distribution — P. indifferens was described from from Bed 12 of the section Aszófő L, (Balatonicus Bosnia, from the upper part of the Anisian ("Lower Subzone of the Balatonicus Zone). Muschelkalk"). The Aszófő specimen was collected Genus Sybillonautilus DIENER, 1915 Sybiîlonautilus cf. pertumidus (Arthaber, 1896) (Plate II: 9) 1896 Nautilus pertumidus AKT. — ARTHABER, p. 42, pl. III, figs 4, 5, 6. non 1915 Nautilus pertumidus V. ARTH. — RASMUSS, p. 285, text-figs 1-2. 1986 Sybillonautilus sp. cf. S. pertumidus (ARTHABER, 1896) — PARNES, p. 49, pl. 6, figs 12-14. 1986 Sybillonautilus rugosus n. sp. — PARNES, p. 49, pi. 6, figs 9-11. non Material

— One poorly preserved, incomplete specimen (M.99.123). Measurements: D WH WW U UP 38 16 (42.2) 21 (55) 14 (36.8) — Description — This is a rather small-sized Sybillonautilus; an incomplete internal cast, partiy with silicified shell. The coiling is rather involute, with deep umbilicus. The inner whorls are stout, rather depressed; the cross-section is subquadratic, narrowing ventrally; the flanks are flat and pass gradually into the rounded venter. The end of the phragmocone and the body chamber rapidly expands laterally, giving a funnelshaped appearance (though the true, trumpet-like peristome is broken from our specimen). The umbilical wall is steep, flat to gendy convave; the umbilical edge is well-defined. The ornamentation is very weak; it consists only of faint growth lines, which are strongly arched posteriorly on the venter. The suture lines are poorly visible; they are simple, with very shallow lateral and ventral lobes. Remarks — DIENER (1915, p. 357) erected a new genus Tumidonautilus for the species pertumidus ARTHABER and this generic name was applied by KUTASSY (1932, p. 742). On the other hand, Kummel (1964), in the "Treatise", took Tumidonautilus as a synonym of Sybillonautilus; this view is accepted here. The Aszófő specimen is incomplete: especially the end part of the body chamber is broken. However, the change in the growth pattern (expansion) can well be observed on the fragment and the trumpet-like body chamber can be reconstructed by extrapolation. It looks most similar to S. pertumidus described by ARTHABER (1. c). The specimen figured by RASMUSS (1. c.) from Silesia was included to Germanonautilus dolomiticus (QUENSTEDT, 1845) by MUNDLOS & URLICHS (1984, p. 18) and this opinion is accepted here. By its similar morphology, the specimen figured by PARNES (1. c.) from Israel is here regarded as a Germanonautilus. On the other hand, the other species of Sybillonautilus described by PARNES (1. c: S. rugosus n. sp.) shows very strong similarity to S. pertumidus and is here tentatively placed into the synonymy of this species. Distribution — S. pertumidus was described by ARTHABER (1896) from the Reifling limestones of Tiefengraben representing the upper part of the Balatonicus Zone (Pelsonian, Middle Triassic) (ASSERETO 1971, TATZREITER & VÖRÖS 1991). The Aszófő specimen was collected from Bed 8 of the section Aszófő L, (Balatonicus Subzone of the Balatonicus Zone). *** ACKNOWLEDGEMENTS — The study was supported by the grant No. 26278 of the Hungarian Scientific Research Fund (OTKA). Explanation to Plate I 1 Anoploceras cf. rollieri (ARTHABER, 1896) (M.99.104.), X 1. — Aszófő I, Bed 77, Balatonicus Zone (Zoldianus Subzone). 2 Encoiloceras balatonicum sp. n., Holotype (M.99.105.), x 1. — Aszófő I (scree), Balatonicus Zone (Balatonicus Subzone). 3 a—b Encoiloceras balatonicum sp. n., Paratype (M.99.106.), x 1. — Aszófő I, Bed 5, Balatonicus Zone (Balatonicus Subzone). 4 Encoiloceras lajosisp. n., Paratype (M.99.108.), X 1. — Aszófő I, Bed 82, Balatonicus Zone (Zoldianus Subzone). 5 a-b Encoiloceras lajosisp. n., Paratype (M.99.114.), x 1. — Aszófő I, Bed 80, Balatonicus Zone (Zoldianus Subzone). 6 a-c Encoiloceras lajosi sp. n., Paratype (M.

99.115.), x 1. — Aszófő II, Bed 5, Balatonicus Zone (Balatonicus Subzone).