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Ammonoid classification problems

1960; Cambridge University Press; Volume: 34; Issue: 4 Linguagem: Inglês

1937-2337

Vasily Ermolaevich Ruzhentsev,

Aquatic Invertebrate Ecology and Behavior

A genetic terminology of the ammonoid suture line is defined and some doubtful aspects of this general problem are considered. Study of ontogenetic sutural developments is shown to be most significant in ammonoid classification. Five orders of Ammonoidea (Agoniatitida, Goniatitida, Clymeniida, Ceratitida, and Ammonitida) are recognized and defined.