Botulopsis Reis, 1926

Kleemann, Karl, 2007, Catalogue and bibliography of Recent and fossil Botula (Bivalvia: Mytilidae), Zootaxa 1508, pp. 1-48 : 27

Botulopsis Reis, 1926

Type species. Botulopsis reisi Waller, 2005 (= Botulopsis cassiana Reis, 1926 non Botulopsis cassiana ( Bittner, 1895) , by monotypy, Ladinian (Wettersteinkalk), Hochalpe, Karwendel, Austria ( Waller 2005: fig. 4.8– 4.10, reproduction of figures 1–3 in Reis 1926, pl. 8).

Diagnosis (emended by Waller 2005: 13). Mysidiellidae moderately inflated and rounded-oblong in shape, with umbones broad and rounded, beaks medially inturned and not extending beyond anteriormost point of anterior shell margin; byssal invagination very shallow.

Botulopsis cassiana ( Bittner, 1895)

Botula (?) cassiana Bittner, 1895: 49 , (231), pl. 5, figs. 17, 18, types: 3 specimens at NHMW (see remarks), type locality: Sanct Cassian, age: Cordevol ( Trachyceras aon zone), basal Carnian, Late Triassic; Bubnoff 1921: 335), = Cardiomorpha de Koninck, 1841 (fide Waller 2005); Reis 1926: (124), = Botulopsis ; Soot-Ryen 1969: (N275), type of Botulopsis ; Tichy 1970: (639); Kleemann 1983: (5, 28),? Arcoperna ,? Botulopsis ; Waller 2005: (13, 14) Lithodomus ( Botula ?) cassiana Bittner - Diener 1923: (139); Zapfe 1967: (436)

Botulopsis cassiana Bittner - “n.s.” n.g., Reis 1926: 124, pl 8, figs. 1–3; Soot-Ryen 1969: N275, fig. C19.4a, b; Waller 2005: (12, 13, 14), fig. 4.7 (reproduction of Bittner’s pl. 5, fig. 18)

Geographic distribution: St. Cassian, Northern Italy, Alpine Europe

Geologic distribution: San Cassiano Formation, Cordevol, basal Carnian, Late Triassic

Remarks. Bittner (1895) was quite uncertain about the generic affinity. Reis (1926) put cassiana , as type species, into his new genus Botulopsis . From the supposedly three syntypes, two are stored in the palaeontological collection of NHMW, Nr. D. 2/3 1884. One left valve, filled with indurated sediment, is the larger specimen, 15.4-12-6.2 x 2 mm (figured in Soot-Ryen 1969), and the smaller is a right valve in sediment, 10.6-8-6 x 2 mm. A third syntype was not found. The attached label reads “ Sigaretus ?” respectively “? Botula cassiana Bittner ”, St. Cassian, Stuores, Southern Tyrol, Alpine Triassic, Trachyceras aon zone, which is basal Carnian (Cordevol, L. Krystyn, pers. comm.).