Lobendoceras
Encyclopedia
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.
Proterocameroceratidae
The Proterocameroceratidae were the first of the Endocerida. They began early in the Ordovician with Proendoceras or similar genus which had developed endocones, replacing the diaphragms of the ellesmerocerid ancestor....
with a rather large, moderately expanded, straight shell with a large marginal siphuncle
Siphuncle
The siphuncle is a strand of tissue passing longitudinally through the shell of a cephalopod mollusk. Only cephalopods with chambered shells have siphuncles, such as the extinct ammonites and belemnites, and the living nautiluses, cuttlefish, and Spirula...
in which sutures have a broad, deep, ventral lobe and septal necks are subholochoanitic to holochoanitic.
Lobendoceras has been found in Lower Ordovician
Ordovician
The Ordovician is a geologic period and system, the second of six of the Paleozoic Era, and covers the time between 488.3±1.7 to 443.7±1.5 million years ago . It follows the Cambrian Period and is followed by the Silurian Period...
marine strata in NW Australia and Siberia.
References
- Curt Teichert, 1964. Endoceratoidea. Treatise on Invertebrate PaleontologyTreatise on Invertebrate PaleontologyThe Treatise on Invertebrate Paleontology published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and...
, Part K. Geol Soc. of America and Univ of Kansas press. Teichert and Moore (eds) - Teichert and Glenister 1954 . Early Ordovician cephalopod fauna from northwestern Australia. Bulletins of American Paleontology 35 (150): 7–112.