Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 23. 2005. (Budapest, 2005)

with BALUK's (1971, Plate 1: 1) pictures. Some of MARLNESCU (1964) specimens are rather eroded; therefore their identification seems to be uncertain. L. cajetanus is very common in the Badenian (Middle Miocene) deposits of the Central Paratethys. It was mentioned from Austria by SULC (1934) and from the area of the present day Czech Republic by REUSS (1860) and SULC (1934). KRÜH (2002) have found this species in the Badenian deposits of Gainfarn, while KROH (2003) described three valves from the Badenian of Austria (Niederleis, Grund). It is also known from several localities in Poland (BALUK 1965, 1971, 1984; MACIOSZCZYK 1988 and STUDENCKA & STUDENCKI 1988). L. cajetanus was mentioned both from the Dacian Basin (MARINESCU 1964) and the Transylvanian Basin (SULC 1934; DELLANGELO et al. 2005) in Romania. However, until now, this is the first report of this species from Hungary. According to STUDENCKA & STUDENCKI (1988) L. cajetanus belongs to the most frequent chiton remains both in the Early and Late Badenian. JL decoratus (= L,. cajetanus) is one of the most common species in the Korytnica clays (BALUK 1971) and in the clayey deposits of Lychów (Roztocze Hills, Poland; MACIOSZCZYK 1988). It belongs to the most frequent chiton species in the Vienna Basin, too (REUSS 1860, SULC 1934) as well as in the studied fauna of the Bakony Mts in Hungary. L. cajetanus is also very common in the Mediterranean area. It was described from the Miocene (Montegibbio) and Pliocene (Zinola, Puianello) of Italy by LAGHI (1977). DELL'ANGELO et al. (1999) have found this species in the Lower Messinian sediments at Borelli, near Torino. SACCO (1897) and FERRERO MORTARA et al. (1984) studied the Pliocene material from Italy. MALATESTA (1962) referred to it from the Pliocene of Italy and Spain. LAGHI (1984) mentioned L. cajetanus among other 9 Polyplacophora species from the Pliocene yellow sands of Siena (Italy). This species was found in the Pleistocene sandy deposits of Parma (Italy) (SABELLI & TAVIANI 1979). BELLOMO & SABELLI (1995) mentioned it without description or illustrations from the Pleistocene deposits of Calabria (South Italy). L. cajetanus is the most common Recent Mediterranean species of genus Lepidopleurus. Very extensive and detailed synonym list was given by CHIRLI (2004) including mainly the Italian and the other Mediterranean records of this species. Distribution — Miocene: Badenian of the Central Paratethys (Austria, Czech Republic, Poland, Romania, Hungary), Mediterranean Sea (Italy). Pliocene and Pleistocene: Italy, Spain. Recent: Eastern Atlantic Ocean from Brittany to Morocco and Canary Islands, northern and western part of the Mediterranean Sea. Paleoecology — L. cajetanus is a shallow water species distributed between 0.5 and 40 m (most common between 1-5 m) under rocks and shells (DELL'ANGELO et al. 1998). According to SABELLI & TAVIANI (1979) this species is a typical element of the infralittoral zone. BELLOMO & SABELLI (1995) (referring to POPPE & GOTO 1991) indicated it from the infralittoral and pardy from the circalittoral zones. POPPE & GOTO (1991) mentioned them on hard substrates from the littoral zone down to about 40 m. According to BALUK (1971) this is the most frequent polyplacophoran species in the Korytnica clays, which was deposited in an environment not deeper than 10 m. LELOUP & VOLZ (1938) mentioned L cajetanus exclusively near the shores among littoral rubbles and rocky cliffs at the eastern coast of the Adriatic Sea. Suborder Ischnochitonina BERGENHAYN, 1930 Family Ischnochitonidae DALL, 1889 Subfamily Ischnochitoninae DALL, 1889 Genus lschnochiton GRAY, 1847 Ischnochiton rissoi (PAYRADEAU, 1826) (Plate III: 1-5) 1934: lschnochiton mdolticensis n. sp. — SULC, pp. 23-24, pi. 2, figs 41-43. 1962: Ischnochiton (I.) rissoi (PAYRAUDEAU, 1826) — MALATESTA, pp. 160-161, text-fig. 16. ? 1965: Ischnochiton mdolticensis SULC, 1934 — BALUK, pp. 369-370, pl. 1, fig. 7. 1971: Ischnochiton mdolticensis SULC, 1934 — BALUK, p. 458, pi. 3, figs 5-8. 1977: Ischnochiton {Simplischnochiton) rissoi (PAYRADEAU, 1826) — LAGHI, p. 104, pl. 1, figs 4—8. ? 1977: Ischnochiton {Simplischnochiton) rissoi (PAYRADEAU, 1826) — LAGHI, p. 104, pl. 1, fig. 9. Explanation to Plate I 1-10 Lepidopleurus {Lepidopleurus) cajetanus (POLI, 1791). 1 Head valve — (L: 2.0 mm; W: 4.5 mm), Bánd, 16x. 2 Details of image 1 — concentric ribs of the head valve, 74x. 3 Head valve — (L: 2.5 mm; W: 5.5 mm), Bánd, 13x. 4 Head valve — (L: 2.6 mm; W: 5.6 mm), Bánd, 13x. 5 Intermediate valve — (I.: 2.2 mm; W: 3.75 mm), Bánd, 20x. 6 Details of image 5 — intersections of granulöse longitudinal ribs and concentric growth lines at the pleural area, 120x. 7 Further details of image 5 — arrangement of macro- and microaesthetes at the eroded middle-anterior part of the valve, 120x. 8 Intermediate valve — (L: 2.6 mm; W: 4.0 mm), Bánd, 16x. 9 Details of image 8 — strong concentric ribs and secondary radial rows of granules at the lateral area, 120x. 10 Intermediate valve — (L: 2.75 mm; W: 4.5 mm), Bánd, 16x.