Taxonomy
Genus: Cymaclymenia
Subfamily: Cymaclymeniinae
Family: Cymaclymeniidae
Sutural formula: L U I or E A L U I. Lateral lobe: asymmetric, rounded, or acute. Conch shape: discoidal or pachyconic. Ornament: growth lines and fine ribs.
Klug & Korn, 2002, Ammoneae Devonicae, Chapter 8
Superfamily: Cyrtoclymenioidea
Cyrtoclymeniina with thinly discoidal to pachyconic conch, narrow to moderately wide umbilicus, deep whorl overlap, and moderately high whorl expansion rate. Basic sutural formula [L] I, septum simply domed without inflexions. Usually without external lobe, but derived forms with external, adventive, and umbilical lobes. Ornament with concavo-convex or biconvex growth lines. Weak ribs present in many species. Thin siphuncle.
Klug & Korn, 2002, Ammoneae Devonicae, Chapter 8
Suborder: Cyrtoclymeniina
Clymeniids with thinly discoidal to pachyconic, usually “goniatitoid” conch, narrow to moderately wide umbilicus. Deep imprint zone, and moderately high whorl expansion rate. Basic sutural formula [L] I, many modifications during phylogeny (development of external, adventive, and umbilical lobes). Septa in early forms simple-domed without inflexion; derived forms with strong marginal inflexions. Ornament with concavo-convex or slightly biconvex growth lines, weak ribs present in many species.
Klug & Korn, 2002, Ammoneae Devonicae, Chapter 8
Order: Clymeniida
Ammonoids with dorsal siphuncle. Conchs thinly discoidal to pachyconic, umbilicus very wide to closed. Low to deep imprint zone, and low to moderately high whorl expansion rate. Basic sutural formula [L] I, many modifications during phylogeny (development of external, adventive, and umbilical lobes). Septa in early forms simple-domed without inflexion; derived forms with anticlastically folded septa. Ornament rarely with convex, mostly with concavo-convex or biconvex growth lines. Weak ribs present in many species.
Klug & Korn, 2002, Ammoneae Devonicae, Chapter 8
Stratigraphy
Period: Devonian
Stage: Famennian
Substage: Upper Famennian
Locality
Country of origin: Morocco
Department/District of origin: Tinghir
Locality of origin: Fezzou-Alnif
Miscellaneous
Collection number: 391
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