Frydiella, Krawczyński, 2006

Krawczyński, Wojciech, 2006, Gastropod succession across the Early-Middle Frasnian transition in the Holy Cross Mountains, southern Poland, Acta Palaeontologica Polonica 51 (4), pp. 679-693 : 689

Genus Frydiella nov.

Type species: Frydiella kaimi gen. et sp. nov.; monotypic.

Derivation of the name: In honour of Dr. Jiří Frýda—Palaeozoic gastropod specialist from Prague ( Czech Republic).

Diagnosis.— Frydiella gen. nov. is characterised by a turbiniform, anomphalous shell with a moderately high spire and a protruding selenizone, on the periphery of the whorl, with an additional, weak spiral cord. Frydiella gen. nov. differs from Bembexia Oehlert, 1888 , Clavibembexia Blodgett, Frýda, and Racheboeuf, 1999, Dictyobembix Tyler, 1965 , and Breizospira Blodgett, Frýda, and Racheboeuf, 1999 in having a higher spire and more distinct selenizone. The genus Quadricarina Blodgett and Johnson, 1992 has a lower whorl and a concave selenizone with an additional pair of spiral cords. The genera Kersadiella Blodgett, Frýda, and Racheboeuf, 1999 and Balbinipleura Bandel and Frýda, 1996 closely resemble each other as far as shell shape is concerned, but their selenizones are more concave and delimited by strong spiral cords and lack an additional spiral thread inside the selenizone. A selenizone with an additional cord is known in Ruedemannia Foerste, 1914 (family Lophospiridae Wenz, 1938 ), but the selenizone is wider and does not protrude; in addition, the spiral cord is stronger than in Frydiella gen. nov.