Leviella veghae Kozur, 1972

Forel, Marie-Béatrice, Kolar-Jurkovšek, Tea & Jurkovšek, Bogdan, 2020, Ostracods from the ‘ Raibl Beds’ (Carnian, Late Triassic) of Belca section in Karavanke Mountains, northwestern Slovenia, Geodiversitas 42 (21), pp. 377-407 : 396

Leviella veghae Kozur, 1972

( Fig. 11 K-T)

Leviella veghae Kozur, 1972: 21, pl. 1, fig. 3; pl. 2, figs 8-14.

Leviella raibliana – Kristan-Tollmann & Hamedani 1973: 213, pl. 12, figs 1, 2.

Leviella fraterna – Kristan-Tollmann et al. 1991b: 206, pl. 3, fig. 7.

EXAMINED MATERIAL. — More than 100 specimens, including isolated valves and complete carapaces.

OCCURRENCE. — Carnian, Late Triassic, Veszprem, Balatón highland, Hungary (Kozur 1972); Late Carnian, Late Triassic, marl layer in the middle part of the Opponitzer Limestone Formation, Göstling/ Ybbs, Austria (Kristan-Tollmann & Hamedani 1973); Carnian, Late Triassic, Raibl, Southern Alps, Italy (Kristan-Tollmann & Hamedani 1973); Carnian, Late Triassic, Transdanubian range, Hungary (Kristan-Tollmann et al. 1991b); Nicoraella ? budaensis conodont zone, late Julian-?earliest Tuvalian, Carnian, Late Triassic, samples BE2, 17, 18, 21, 23/1 ( Fig. 3 ), Belca section, ‘Raibl Beds’, Karavanke Mountains, Slovenia (this work).

DIMENSIONS. — Fig. 13.

DISCUSSION

Leviella veghae Kozur, 1972 has been retrieved from all studied samples in Belca section. It is moderately abundant in BE2, abundant in samples BE17 to BE21 and rare in BE23/1 ( Fig. 3 ). All the specimens available from the literature are gathered in Fig. 13 . At least six ontogenetic stages are reconstructed from the right valves, where the gaps between the successive scatter plots are more clearly visible than for the left ones. Thanks to the complete carapaces documented from the present work, the stages A-1, A-2 and A-4 are constrained for right valves as well. On the basis of the ontogenetic stages here reconstructed, the holotype of L. veghae (a right valve) is an adult. The ontogenetic development of L. veghae is very similar to L. bogschi in that it mainly witnesses the progressive enlargement of the posterior end of the carapaces as well as the development of the lateral structures.

Figures

FIG. 11. — Ostracods from the Belca section, Karavanke Mountains, northwestern Slovenia, Carnian, Late Triassic. All specimens are deposited in the micropalaeontology collections of the Geological Survey of Slovenia, under the numbers GeoZS6132 to GeoZS6239, preceded by sample number:A-J, Leviella bogschi Kozur, 1972; A, left lateral view of a carapace, A-1, BE21 (GeoZS6216); B, lateral view of a left valve, A-1, BE18 (GeoZS6217); C, lateral view of a left valve, A-2, BE18 (GeoZS6218); D, lateral view of a right valve, A-2, BE18 (GeoZS6219); E, lateral view of a left valve,A-3, BE18 (GeoZS6220); F, lateral view of a right valve, A-3, BE18 (GeoZS6221); G, lateral view of a right valve, A-3, BE18 (GeoZS6222); H, left lateral view of a carapace, A-5, BE21 (GeoZS6223); I, lateral view of a right valve, A-5, BE17 (GeoZS6224); J, lateral view of a right valve, A-6, BE18 (GeoZS6225); K-T, Leviella veghae Kozur, 1972; K, lateral view of a left valve, A-5, BE18 (GeoZS6226); L, lateral view of a right valve, A-5, BE18 (GeoZS6227); M, left lateral view of a carapace, A-4, BE21 (GeoZS6228); N, lateral view of a right

FIG. 3. — Distribution of ostracod species through the Belca section, Karavanke Mountains, northwestern Slovenia.

FIG. 13. — Height/Length scatter plots of Leviella veghae Kozur, 1972. The dimensions of right and left valves of complete carapaces are linked.