Heidelbergeria, Krawczynski, 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 Heidelbergeria nov.

Type species: Heidelbergeria czarnieckii gen. et sp. nov.; monotypic.

Derivation of the name: In honour of Dr. Doris Heidelberger—Palaeozoic gastropod specialist from Oberursel ( Germany).

Diagnosis.— This genus is characterised by a turbiniform shell with low whorls and narrow phaneromphalous base and thick columellar lip; it differs from the Silurian Discordichilus Cossmann, 1918 in having a narrow phaneromphalous base, a straighter columellar lip with a thicker parietal part. The genus Elasmonema Fischer, 1885 has shallower sutures, distinctly higher whorl and collabral ornament. Heidelbergeria differs from Anematina Knight, 1933 by a thicker columellar lip and a lower whorl. The genus Holopea Hall, 1847 (family Holopeidae Wenz, 1938 ) is similar in shell shape but has a thinner and more arched inner lip and only prosocline growth lines. Archaeosphera Heidelberger and Bandel, 1999 resembles the new genus very closely in shell shape, but Heidelbergeria has a thicker and straighter inner lip, a narrower umbilicus and whorls embrace each other distinctly below the periphery. The turbiniform shell with thick columellar lip is also similar to that of genera of the family Anomphalidae Wenz, 1938 . Heidelbergeria differs from the Permian Sosiolytes Gemmellaro, 1889 in showing a narrow phaneromphalous base and thick inner lip. The Carboniferous Turbinilopsis Koninck, 1881 has a longitudinal groove on the columellar lip and the umbilicus is covered by callus. Anomphalus Meek and Worthen, 1867 and Isonema Meek and Worthen, 1866 have cryptomphalous shells.