Pragozyga costata Frýda, 1999

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

Pragozyga costata Frýda, 1999

Holotype. UUG JF 756 (Frýda 1999: fig. A,B,D,E).

Paratypes. UUG JF 757–769.

Type locality. Malá Chuchle, old quarry (50°1'30.399"N, 14°22'46.758"E), a suburb SW of Prague.

Type horizon. Dvorce-Prokop Limestone (Praha Formation); Pragian, Early Devonian.

Remarks. The large and smooth protoconch of P. c os t at a, with diameter slightly more than 0.35 mm, is formed only by half of the first whorl. All whorls succeeding the protoconch are ornamented by collabral threads (Frýda 1999: fig. 3D,E).

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