Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 19. 2001. (Budapest, 2001)
8 ve weak longitudinal strigation (lime) and weak, rursiradiate riblets. There are four longitudinal lirae: one at the umbilical margin, another at the 1/5 height of the flank, a third at 2/3 height of the flank and a fourth at the ventrolateral margin. The crossings of the longitudinal lirae and the riblets appear as faint nodes. The venter is smooth, except the very fine, posteriorly arched growth lines and a very weak longitudinal lira at the middle. Suture lines are not visible. Remarks — On the basis of their subquadrate whorl-section and four longitudinal lirae on their flanks, the Aszófő specimens can well be identified with X. nodulosus (ARTHABER). There are many Middle Triassic forms showing similar pattern of ornamentation. A group of them, e. g. T. subgemmatus (MOJSISOVICS, 1882), T. clathratus (HAUER, 1896) has subrounded whorl-section. The other group with subquadrate whorlsection may be further differentiated on the basis of the strength, number and position of the longitudinal lirae: the ribs and nodes are strong in T. crassescens (ARTHABER, 1896) and T. ambiguus (ARTHABER, 1896); "T. crassescens var. jugulatuf (ARTHABER, 1896) has weak longitudinal lirae only near the umbilical margin, whereas "T. crassescens var. semijugulatd^ (ALMA, 1926) has five longitudinal lirae. These latter two nominal taxa may probably be included into T. nodulosus. Distribution — T. nodulosus 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). Our specimens came from Beds 90 and 95 of the section Aszófő I., ranged into the Binodosus Subzone of the Trinodosus Zone by VÖRÖS (1987). Genus Germanonautilus MOJSISOVICS, 1902 Germanonautilus cf. salinarius (MOJSISOVICS, 1882) (Plate II: 6a-b; Figure 6) 1882 Nautilus salinarius E. V. MOJSISOVICS — MOJSISOVICS, p. 282, pl. XCI, fig. 3a-b. 1882 Nautilus indet. — MOJSISOVICS, p. 282, pl. XCII, fig. la-b. 1907 Germanonautilus cf. salinarius V. MojS. — DlENER, p. 29, pl. Ill, fig. 1. 1937 Nautilus gorasd^ensis n. sp. — ASSMANN, p. 99, pi. 19, fig. la-b. 1960 Germanonautilus salinarius (MOJSISOVICS) — KUMMEL, p. 291, pi. 3, figs 1-2. 1984 Germanonautilus salinarius (MOJSISOVICS) — MUNDLOS & URLICHS, p. 20, pl.3, figs 3-4. 1986 Germanonautilus salinarius (MOJSISOVICS) 1882 — PARNES, p. 41, pi. 20, figs 5-6 (? non pl. 9, figs 5-6 and pi. 20, fig. 7). Material — Three incomplete specimens; two internal casts and a fragmentary and slighdy crushed silicified shell. Measurements: D WH WW U UP 64.5 26.5 (41.1) 41.7 (64.7) 16.8 (26.0) 31 13.5 (43.5) 21 (67.7) 11.4 (37.1) 2 cm t. * Description — This is a rather small-sized Germanonautilus. The coiling is moderately involute (convolute); with rather rapidly expanding whorls. The whorl-section is subquadrate, slightly depressed trapezoidal, narrowing ventrally. The umbilical wall is convex; the umbilical margin is blunt, not well-defined. The flanks are flat and pass gradually into the venter, which is flat to gentiy arched. This is a smooth form without any ornamentation. The terminal part of the body chamber of the largest and best preserved specimen (M. 99.120) shows a constriction parallel to the peristome. The suture lines are simple, with a moderately deep lateral and a very shallow ventral lobe. Remarks — The genus Germanonautilus (including G. salinarius) was revised recendy by MUNDLOS & URLICHS (1984). Their interpretation is by and large accepted here, therefore "Nautilus indet." MOJSISOVICS Figure 6 — Cross-section (A) and suture line at WH""""23 mm (B) of Germanonautilus cf. salinarius (MOJSISOVICS, 1882) (M.99.120), Aszófő I, Bed 90, Trinodosus Zone (Binodosus Subzone) .
