Eucyclomphalus von Ammon, 1892

Szabó, János, 2018, Gastropods of the Lower Jurassic Hierlatz Limestone Formation, part 4. New eucycloidean, trochoidean, neritimorph, and caenogastropod taxa in the fauna of the Hierlatz Alpe (Hallstatt, Austria), Fragmenta Palaeontologica Hungarica 35, pp. 61-84 : 66

Genus? Eucyclomphalus von Ammon, 1892

Type species – Trochus cupido d’Orbigny, 1850

Remarks – Seemingly, the teleoconch morphology of Eucyclomphalus well matches to the diagnosis of Eucyclidae , but the earliest shell parts of the type species are still unknown. The next species has many characters in common with Eucyclomphalus but the small remnant of the earliest teleoconch whorl of the available specimen bears two peripheral spiral threads, which indicate eucycloscalid relation by GRÜNDEL (2007) system.

Another generic position of the next species could be in Lokuticyclus Szabó, 1995 , having also phaneromphalous shell but without any peripheral angulation in all available specimens. This genus has been established as subgenus in Eucyclus J.-A. Eudes-Deslongchamps, 1860 but, with the new interpretations of Eucyclidae ( GRÜNDEL 2007) and the nominate genus ( FERRARI et al. 2014), Lokuticyclus must be regarded as an independent genus in an uncertain eucycloidean family accommodation since the earliest teleoconch whorls have yet been unknown in all species.

As a conclusion: the family position of the next species appears resolved but the generic attribution remains dubious. It is simply a new species if Eucyclomphalus was member of Eucycloscalidae but represents also a new genus in this family if it was component of Eucyclidae .

Eucyclomphalus ? subgradatus n. sp.

( Figs 1–4)