Nuculana sulcellata ( Wissmann, 1841 )

Hausmann, Imelda M., Nützel, Alexander, Roden, Vanessa Julie & Reich, Mike, 2021, Palaeoecology of tropical marine invertebrate assemblages from the Late Triassic of Misurina, Dolomites, Italy, Acta Palaeontologica Polonica 66 (1), pp. 143-192 : 172-173

Nuculana sulcellata ( Wissmann, 1841)

Fig. 26A, E .

1841 Nucula sulcellata Wissm. ; Münster 1841: 85, pl. 8: 15. 1843 Nucula sulcellata Wissm. ; Klipstein 1843: 263, pl 17: 19. 1857 Nucula sulcellata Wissm. ; Hauer 1857: 558, pl. 2: 11, 12. 1865 Leda sulcellata Wissmann sp.; Laube 1865: 68–69, pl. 19: 5. 1895 Leda sulcellata Wissm. sp. (emend.); Bittner 1895: 147–148, pl.

18: 10. 1981 Naculana [sic!] sulcellata (Muenster) ; Zardini 1981: pl. 3: 4,

6–13. 1988 Nuculana sulcellata Muenster ; Zardini 1988: pl. 4: 34.

Material.— Ten specimens, 3 from bulk samples, 7 from surface samples; 2 from Lago Antorno ( PZO 12857 , 1 figured specimen; PZO 12856 , 1 specimen); 8 from Misurina Landslide ( PZO 12745 , figured specimen; PZO 12744 , 7 specimens); Italy, Carnian , Triassic .

Remarks.—Single- and double-valved shells occur in the samples. The characteristic long rostrum at the posterior end is broken in all specimens. Nevertheless, the shells fit best to Bittner’s (1895), Laube’s (1865) and Zardini’s (1981) illustrated specimens of this species. This bivalve species is relatively common in the Cassian Formation and was also found at the localities Costalaresc, Rumerlo, Alpe di Specie and Stuores Wiesen (see Roden et al. 2020a and references therein). Bittner (1895) mentioned that Münster’s (1841) type specimen of this species does not fit to Münster’s (1841) respective description and illustrations and assumed that it is not the real holotype. He therefore described it as Leda wissmanniana sp. nov. and emphasised that there are doubts if the type specimen really comes from the Cassian Formation.

Stratigraphic and geographic range.—Carnian, Upper Triassic; northern Italy (Cassian Formation). Norian, Russia; Lacian–Alaunian, Peru (Suta Formation) ( Diener 1923; Paleobiology Database, https://paleobiodb.org).

Figures

Fig. 26. Nuculid bivalves from LagoAntorno (A, B) and Misurina Landslide (C–E), northern Italy, Cassian Formation, Carnian, Upper Triassic.A. Nuculana sulcellata (Wissmann, 1841), PZO 12857, in lateral view.B. Palaeoneilo elliptica (Goldfuss, 1837), PZO 12859, in lateral (B1) and dorsal (B2) views. C. Palaeonucula strigilata (Goldfuss, 1837), PZO 12742, in lateral (C1) and dorsal (C2) views. D. Palaeonucula strigilata (Goldfuss, 1837), PZO 12743, in lateral view. E. Nuculana sulcellata (Wissmann, 1841), PZO 12745, in lateral (E1) and dorsal (E2) views.