The name Orthoceras is a slight homonymy case. This name is used according to the rules of several different nomenclatural codes.

Orthoceras

Botany

Taxonomy

Orchidaceae 18

Specimens registered in collections

Collection Number of specimens (or sets)
Vascular plants (P) 18

Orthoceras

Zoology

Taxonomy

Mollusca 77
Cephalopoda 77
Orthocerida 77
Orthoceratidae 77

Specimens registered in collections

Collection Number of specimens (or sets)
Paleontology (F) 77