Palaeozygopleura vesna Horný 1955

Frýda, Jiří, Ferrová, Lenka & Frýdová, Barbora, 2013, Review of palaeozygopleurid gastropods (Palaeozygopleuridae, Gastropoda) from Devonian strata of the Perunica microplate (Bohemia), with a re-evaluation of their stratigraphic distribution, notes on their ontogeny, and descriptions of new taxa, Zootaxa 3669 (4), pp. 469-489 : 483

Palaeozygopleura vesna Horný 1955

Holotype. NMP 34871 (Horný 1955: pl. III, fig. 3).

Paratypes. Two specimens NMP unnumbered.

Type locality. Section in a small quarry NE of the village of Holynĕ and W of the Prastav quarry (50°1'57.627"N, 14°21'5.471"E).

Type horizon. Uppermost part of Třebotov Limestone (Daleje-Třebotov Formation); the latest Emsian to early Eifelian, Middle Devonian.

Remarks. Only three incomplete shells of this species are known; they were collected by F. Prantl from weathered beds in uppermost part of the Třebotov Limestone. Its shell morphology shows some resemblance with the older P. vaneki , but the latter differs from P. v e s n a by a higher number of costae, which are also more asymmetrically curved. Paleozygopleura vesna has two-edged costae (Horný 1955: 38, pl. 3.3), but costae in P. vaneki have a triangular profile (Frýda et al. 2008: fig. 1H).

Stratigraphic and geographic distributions. This rare species is only known from its type horizon and locality.