Stroboceras sp.

Korn, Dieter & Bockwinkel, Jürgen, 2022, Early Carboniferous nautiloids from the Central Sahara, southern Algeria, European Journal of Taxonomy 831, pp. 67-108 : 84

publication ID

https://doi.org/ 10.5852/ejt.2022.831.1871

publication LSID

lsid:zoobank.org:pub:EAA2EAE2-DA8B-4516-B332-CB8423B8EEAA

DOI

https://doi.org/10.5281/zenodo.6903232

persistent identifier

https://treatment.plazi.org/id/9327592F-F43B-1943-FD02-1B74FAB45615

treatment provided by

Felipe

scientific name

Stroboceras sp.
status

 

Stroboceras sp.

Fig. 13 View Fig , Table 7 View Table 7

Material examined

ALGERIA • 1 specimen; Sebkha de Timimoun 14.5 km west-southwest of Timimoun (locality TIM-C8); Argiles de Timimoun supérieur (Upper Bollandoceras Assemblage ; early to middle Viséan); Korn et al. 2002 Coll.; illustrated in Fig. 13 View Fig ; MB.C.30460 .

Description

The only specimen present is a phragmocone fragment consisting of three chambers ( Fig. 13A View Fig ). It has, at 10.5 mm whorl height, a depressed pentagonal whorl profile (ww/wh = 1.44). It shows a prominent, rounded ventrolateral shoulder accompanied by shallow longitudinal grooves. The centre of the venter is shallowly convex and the umbilical margin separates the weakly convex flank from the almost flat umbilical wall by a low ridge ( Fig. 13B View Fig ). A narrow, very shallow concave whorl zone is present. The suture line shows a course dependent on the outline of the whorl profile; saddles lie in the inflated areas of the profile and lobes in the indented ones ( Fig. 13C View Fig ). Therefore, the external lobe appears trilobate and the ventrolateral saddle is raised. An internal lobe is induced by the concave whorl zone.

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF