#deltocymatoceras
Deltocymatoceras
Extinct genus of nautiloids
Deltocymatoceras is an involute cymatoceratid (Nautilioidea-Nautilida) with broadly arched whorl sides, strongly convergent on a narrow venter that bears a slight, rounded, keel-like ridge, and with no distinct ventro-latera shoulders. Sides bear cymatoceratid ribs that bifurcate near the middle of the whorl sides, but do not cross the venter. The suture has a somewhat pointed ventral saddle, broad lateral lobes and prominent saddles on the umbilical shoulders. The position of the siphuncle in undetermined.
Tue 18th
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