Cyclolobidae: Goniatitid

Ammonoidea Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttle ...

belonging to the Cycloloboidea with thickly discoidal to subgloblar shells with a small but open umbilicus and ammonitic sutures with numerous lobes that have subparallel sides. The Cyclolobidae is one of three

families Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Ideall ...

of the Superfamily Cyclolobaceae; an extinct group of ammonoid cephalopods from the Late

Paleozoic The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ' ...

References

* Miller, A.K., Furnish, & Schindewolf. Paleozoic Ammonoidea ''in the''

Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ...

, Part L, Ammonoidea. Geol Soc of Amererica and Univ of Kansas press; R,C. Moore,(ed).
The Paleobiology Database
10/01/07 Goniatitida families Cyclolobaceae {{Goniatitida-stub