Koenenites Wedekind 1913

Genus Koenenites Wedekind, 1913

Type species

Goniatites lamellosus Sandberger & Sandberger, 1851 (original designation).

Diagnosis

Genus of the family Koenenitidae with extremely discoidal, subinvolute to involute conch; venter rounded in all stages. Suture line with wide external lobe, moderately high median saddle, narrowly V-shaped E 2 lobe, U-shaped or V-shaped lateral lobe and rounded umbilical lobes. Suture line formula (E 2 E 1 E 2) L U 2: U 1 I.

Included species

Goniatites lamellosus Sandberger & Sandberger, 1851, Rhenish Mountains; Koenenites baoshanensis Yang, 1984, Yunnan; Koenenites cooperi Miller, 1938, Michigan; Koenenites lamellosus kirchgasseri House, 1978, West Virginia; Manticoceras Pattersopni var. styliophilus Clarke, 1899, New York; Goniatites sublamellosus Sandberger & Sandberger, 1851, Rhenish Mountains (synonym of Koenenites lamellosus (Sandberger & Sandberger, 1851)); Koenenites uralensis Bogoslovsky, 1969, North Urals.

Remarks

Koenenites is the only genus of the family Koenenitidae in which the conch has a rounded venter. Koenenites, along with Hoeninghausia, also has the simplest suture line in the family with only two umbilical lobes.