Marathonitaceae

Belongs within: Gastriocerataceae. The Marathonitidae are a group of more or less globular ammonoids known from the Upper Carboniferous to the Upper Permian (Miller et al. 1957). Marathonitaceae |–HyattoceratidaeHK93 | |–Leeites leei (Glenister & Furnish 1987)HK93 | `–HyattocerasHK93 | |–H. cumminsiG31 | `–H. subgeinitzi Haniel 1915HK93 `–MarathonitidaeRR79 |–Marathonites smithiP68 |–KargalitesRR79 |–TabantalitesRR79 |–DemarezitesRR79 |–Pseudovidrioceras pygmaeum (Gemmellaro… Continue reading Marathonitaceae

Popanoceratidae

Belongs within: Gastriocerataceae. The Popanoceratidae are a group of discoidal to globular ammonoids known from the Upper Carboniferous to the Upper Permian (Miller et al. 1957). Characters (from Miller et al. 1957): Conch discoidal to globular, umbilicus small. Sutures ceratitic to ammonitic, forming series of subequal lateral lobes. PopanoceratidaeSLE01 |–Protopopanoceras sublahuseni (Gerassimov 1937)HK93 |–PropopanocerasRR79 |–Epitauroceras… Continue reading Popanoceratidae

Adrianitidae

Belongs within: Neoglyphiocerataceae. The Adrianitidae are a group of discoidal to globular ammonoids known from the Upper Carboniferous to the Middle Permian (Miller et al. 1957). Characters (from Miller et al. 1957): Discoidal to globular conchs with variable umbilici. Goniatitic suture with ten to thirty lobes that tend to be subequal. Adrianitidae [Adrianitaceae, Adrianitoidea]ZL04 |–Dunbarites… Continue reading Adrianitidae

Perrinitidae

Belongs within: Neoglyphiocerataceae. The Perrinitidae are a group of ammonoids with ammonitic sutures known from the Lower and Middle Permian (Miller et al. 1957). Characters (from Miller et al. 1957): Conch thickly subdiscoidal to subglobular and involute, umbilicus small. Sutures ammonitic with five pairs of distinctly V-shaped lateral lobes both externally and internally. Perrinitidae [Paraperrinitinae]… Continue reading Perrinitidae

Cycloloboidea

Belongs within: Gastriocerataceae. The Cycloloboidea are a group of discoidal to globular ammonoids known from the Upper Carboniferous to the Upper Permian (Miller et al. 1957). Characters (from Miller et al. 1957, as Cyclolobaceae): Thickly discoidal to globular conchs, typically with small umbilici and ceratitic sutures possessing auxiliary lobes. Primitively with few auxiliary lobes; advanced… Continue reading Cycloloboidea

Agathiceratidae

Belongs within: Goniatitina. The Agathiceratide are a group of subdiscoidal to globular ammonoids known from the Upper Carboniferous to the Middle Permian (Miller et al. 1957). Characters (from Miller et al. 1957): Conch subdiscoidal to globular, umbilicus small, test prominently longitudinally lirate. Sutures goniatitic. Agathiceratidae [Eothinitidae, Paragastrioceratidae]ZL04 | i. s.: GaetanocerasRR79 | Epiglyphioceras Spath 1930RR79,… Continue reading Agathiceratidae

Gastrioceras

Belongs within: Gastriocerataceae. Gastrioceras is an Lower to Middle Pennsylvanian (Upper Carboniferous) genus of ammonoid. Characters (from Gordon 1964): Conch subglobose to subdiscoidal at maturity, more or less barrel-shaped in immaturity, planorbital when young. Venter well-rounded; umbilicus moderately involute to evolute; umbilical shoulder ornamented by generally transversely elongate nodes. Transverse sculpture may or may not… Continue reading Gastrioceras

Cravenoceras

Belongs within: Neoglyphiocerataceae. Cravenoceras is an Upper Mississipian (Lower Carboniferous) genus of ammonoid. Characters (from Gordon 1964): Conch thick discoidal to globose, narrowly to widely umbilicate; ornamented by flat transverse striae, slightly raised along orad edge giving appearance of raised bands; lamellae in mature shelled bowed slightly orad across venter, flattened in middle or form… Continue reading Cravenoceras

Goniatites

Belongs within: Goniatitina. Goniatites was a mid-Visean (Early Carboniferous) genus of ammonoid, the type of the Goniatitida. Like other goniatitids, Goniatites had an angular ‘zig-zag’ suture morphology. Members of this genus have been identified as index fossils in Europe and North America (Ross 1979). Characters (from Korn et al. 2005): Moderately large, thickly discoidal to… Continue reading Goniatites