Glenesteroceras, which is of questionable validity[citation needed], is based on a single specimen from the Lower Ordovician of New York state, described by Rousseau Flower, 1957.

Glenisteroceras
Temporal range: late Early Ordovician
Scientific classification
Kingdom:
Phylum:
Class:
Subclass:
Order:
Family:
Genus:
Glenisteroceras

Flower, 1957

Glenestoceras is described as being a weakly annulate orthocone with a circular cross section and large central siphuncle with slightly divergent necks, thick connecting rings, and expanded segments. Description is based on an incomplete immature phragmocone with a 5mm cross section.

References

edit
  • Walter A Sweet, 1964. Nautiloidea - Orthocerida, Treatise on Invertebrate Paleontology, Part K, incl Nautiloidea. Geological Society of America and University of Kansas Press.