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

Aptychus

Botany

Taxonomy

Sematophyllaceae 12

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogams (PC) 12

Aptychus

Zoology

Taxonomy

Mollusca 103
Cephalopoda 103
Ammonitida 54
Ammonoidea 49
Incertae sedis 103

Specimens registered in collections

Collection Number of specimens (or sets)
Paleontology (F) 105