Maelonoceras is a Late Ordovician - early Silurian oncocerid found in Ontario.

Description

The shell is a faintly gibbous exogastric cyrtocone with subparallel dorsal and ventral profiles but adorally converging sides. The aperture vizored, pear-shaped. The Siphuncle small, ventral.

Taxonomic relation

Maelonoceras is nautiloid cephalopod included in the Oncoceratidae along with such genera as Oncoceras, Belotoceras, Digenuoceras, and Maimoceras.

References

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• Walter C. Sweet, 1964. Nautiloidea-Oncocerida. Treatise on Invertebrate Paleontology, Part K.
• Maelonoceras Fossilworks entry.
• Jack Sepkoski 2002. List of cephalopod genera