Stroboceras Hyatt, 1884

Korn, Dieter & Klug, Christian, 2023, Early Carboniferous coiled nautiloids from the Anti-Atlas (Morocco), European Journal of Taxonomy 885, pp. 156-194 : 161-162

Genus Stroboceras Hyatt, 1884

Type species

Gyroceras Hartii Dawson, 1868 ; original designation.

Diagnosis

Genus of the family Trigonoceratidae with discoidal, subevolute to evolute conch; whorls slightly embracing, outer whorl may lose contact to the penultimate whorl. Adult conch with a polygonal whorl profile; venter slightly convex, flattened, less often slightly concave, flanks almost flat or irregularly concave, dorsum slightly concave. Conch moderately to rapidly increasing in height with a high coiling rate (WER usually higher than 2.00). Prominent longitudinal keels usually well developed, separated by concave zones. Suture line with small lobes and saddles reflecting keels and longitudinal grooves on the surface of the conch. Siphuncle small with subcentral position between septum centre and venter (after Shimansky 1967; emended).

Included species

A review of the species belonging to Stroboceras has been given by Korn & Bockwinkel (2022). Species of the genus have been described from the following regions:

North America ( Dawson 1868; Miller & Garner 1953; Niko & Mapes 2005): Gyroceras Hartii Dawson, 1868 , Nova Scotia; Stroboceras intermedium Miller & Garner, 1953 , Michigan; Stroboceras gordoni Niko & Mapes, 2005 , Arkansas.

Northern and Central Europe ( Hyatt 1893; Schmidt 1951; Ramsbottom & Moore 1961): Stroboceras anglicum Hyatt, 1893 , Yorkshire; Coelonautilus humerosus Schmidt, 1951 , Rhenish Mountains; Stroboceras trifer Schmidt, 1951 , Silesia; Stroboceras evansi Ramsbottom & Moore, 1961 , Ireland.

North Africa ( Korn & Bockwinkel 2022): Stroboceras mane Korn & Bockwinkel, 2022 , Algeria; Stroboceras ancilis Korn & Bockwinkel, 2022 , Algeria.

Western Russia and Urals( Murchison et al. 1845; Eichwald 1857; Shimansky 1967): Nautilus bicarinatus de Verneuil in Murchison et al., 1845, South Urals; Nautilus ammoneus Eichwald, 1857 , South Urals; Stroboceras mstense Shimansky, 1967 , Moscow Basin.

Remarks

For a discussion of the composition and limits of the genus, see Korn & Bockwinkel (2022).