Lispoceras Hyatt, 1893

Korn, Dieter, Miao, Luyi & Bockwinkel, Jürgen, 2022, The nautiloids from the Early Carboniferous Dalle à Merocanites of Timimoun, western Algeria, European Journal of Taxonomy 789, pp. 104-129 : 111

Genus Lispoceras Hyatt, 1893

Type species

Lispoceras trivolve Hyatt, 1893 ; original designation.

Diagnosis

Genus of the family Trigonoceratidae with evolute conch; whorls just touching each other; whorl profile weakly depressed elliptical or circular. Ornament in the adult stage with fine growth lines, in the preadult stage with fine spiral lines. Suture line with shallow external and lateral lobes. Siphuncle small with subcentral position (after Kummel 1964; emended).

Included species

Lispoceras orbis sp. nov., Algeria; Lispoceras proconsul Shimansky, 1967 , Kazakhstan; Lispoceras rotundum Hyatt, 1893 , Ireland; Lispoceras trivolve var. simplum Hyatt, 1893 , Belgium; Lispoceras trivolve Hyatt, 1893 , Belgium.

Remarks

Lispoceras was an insufficiently described and delimited genus; the type species L. trivolve was described by Hyatt (1893: 426) but not illustrated. Kummel (1964: K430) then published a photographic illustration of the type species and Shimansky (1967: 141) provided a more accurate diagnosis of the genus.

Stratigraphic range

Late Tournaisian to Viséan.