Lucinidae Fleming, 1828

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 : 175-176

Family Lucinidae Fleming, 1828

red specimen, PZO 12865 , 1 specimen ); 5 from Misurina Landslide ( PZO 12755 , 5 specimens); Italy, Carnian , Triassic .

Description.— Septocardia pichleri ( Bittner, 1895) is subovate-shaped with a subtruncate posterior margin; length and width of the illustrated specimen ( Fig. 28 ) are 3.8 mm and 3.5 mm; shell highly inflated; externally ornamented primarily with strongly developed radial costae; fine concentric lirae are present, which are most obvious in the interspaces between the radial costae; tubercles and cross bars are occasionally present on the radial costae with stronger developed cross bars at the anterior ventral side; disarticulated and articulated specimens occur.

Remarks.—The present material agrees well with the type specimens illustrated by Bittner (1895) from the localities Issberg-Gehänge and Bergangerl near Hall in Northern Tyrol, Austria (northern Alps). Bittner (1895: pl. 4: 17) also illustrated an articulated specimen from the Cassian Formation of the Seelandalpe. Bittner stated that he could not study the hinge of the material from the southern Alps but that it shows no external morphological differences to the type material from the northern Alps. The present specimens are relatively small. The specimen from Alpe di Specie illustrated by Schneider and Carter (2001) closely resembles the present specimens and is of approximately the same size.

Stratigraphic and geographic range.—Carnian, Upper Triassic; northern Italy (Cassian Formation, northern Alps); Hungary (Bakony); Russia (Volzeia Beds Formation) ( Diener 1923; Paleobiology Database, https://paleobiodb.org).

Figures

Fig. 28. Cardiid bivalve Septocardia pichleri (Bittner, 1895) from Lago Antorno, northern Italy, Cassian Formation, Carnian, Upper Triassic. PZO 12866, in ventral (A1), dorsal (A2), and lateral (A3, A4) views.