Palaeozygopleura alinae (Perner, 1907)

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 : 477-478

Palaeozygopleura alinae (Perner, 1907)

Lectotype. Specimen NMP ČF 857 selected as lectotype by Horný (1955) and figured by Perner (1907: pl. 110, figs. 5–6) and by Horný (1955: pl. 1, fig. 3).

Paralectotypes. NMP 348665–7. Three shells selected by Horný (1955: pl. II, figs 1–3) as paralectotypes were collected by J. Bouška at Barrandov I.

Type locality. Dvorce, a suburb of Prague (50°3'4.323"N, 14°25'2.879"E).

Type horizon. Lower Devonian, Pragian; Dvorce-Prokop Limestone, Barrandian area, Bohemia.

Remarks. Horný (1955) divided this species into three subspecies - Palaeozygopleura (P.) alinae alinae (Perner, 1907) , Palaeozygopleura (P.) alinae planicostata Horný, 1955, and Palaeozygopleura (P.) alinae multicostata Horný, 1955. The subspecies Palaeozygopleura (P.) a. planicostata is based on a single shell coming from the type locality of Palaeozygopleura (P.) a. alinae . In contrast to the holotype of the latter subspecies, Palaeozygopleura (P.) a. planicostata, was collected by R. Růžička from the Slivenec Limestone (thus from a different facies of the Praha Formation, than the holotype of the nominal subspecies). However, Palaeozygopleura (P.) a. alinae was also found in the Slivenec Limestone at the type locality. Both subspecies probably are synonyms. In constrast, Palaeozygopleura (P.) alinae multicostata comes from much younger strata (uppermost part of the Třebotov Limestone, Daleje-Třebotov Formation, the latest Emsian to early Eifelian) at the Holynĕ locality. This subspecies is based on a single specimen collected by F. Prantl. No additional specimens of this subspecies have been found and thus, an evaluation of its morphological variability is impossible.

Stratigraphic and geographic distributions. Palaeozygopleura alinae (Perner 1907) was recorded from the Slivenec Limestone at Dvorce, Klukovice, and Konvářka sections, from the Dvorce Limestone at Dvorce, Barrandov, and Konvářka well as from the Třebotov Limestone at Holynĕ section.