orthochoanitic
/ˌɔːθəʊkəʊəˈnɪtɪk/Palaeontology. Now rare
adjective
Having a straight, very short septal neck; (also) relating to or characteristic of the former suborder Orthochoanites of nautiloid cephalopods.
Origin
Early 20th century. From scientific Latin Orthochoanites + -ic.