What is "lobendoceras"

Lobendoceras is a proterocameraceratid with a rather large, moderately expanded, straight shell with a large marginal siphuncle in which sutures have a broad, deep, ventral lobe and septal necks are subholochoanitic to holochoanitic.

Lobendoceras has been found in Lower Ordovician marine strata in NW Australia and Siberia.