Definition of Protocycloceras. Meaning of Protocycloceras. Synonyms of Protocycloceras

- 1964) includes the follow genera, given with brief descriptions. Protocycloceras. Strongly annulate orthocones; cross section circular; annulations...
- Meikeloceras Microbaltoceras Monogonoceras Ogygoceras Pictetoceras Protocycloceras Quebecoceras Rangeroceras Rhabdiferous Rioceras Rudolfoceras Smithvilloceras...
- †Protoconchioides †Protoconchioides varians †Protocycloceras †Protocycloceras geronti**** †Protocycloceras lamarcki †Protorthis – tentative report †Protorthis...
- †Proteoceras †Proterocameroceras †Proterovaginoceras †Protobactrites †Protocycloceras †Protokionoceras †Protophragmoceras †Pselioceras †Pseudactinoceras...
- Kröger & Pohle Ordovician (Floian) Valhallfonna Formation  Norway Protocycloceras minor Sp. nov Valid Kröger & Pohle Ordovician (Floian) Valhallfonna...
- sp. Lonchodomas sp. Maclurites sp. Quadrilobella sp. Parapyxion sp. Protocycloceras sp. Sibiritella sp. Suriaspis sp. Synhomalonotus sp. Technophorus sp...
- †Protobarinophyton †Protobarinophyton pennsylvani**** †Protocaris †Protocycloceras †Protocycloceras rushense †Protoleptostrophia †Protoleptostrophia perplana †Protomya...
- species †Protocrisina †Protocycloceras †Protocycloceras catulus †Protocycloceras furtivum †Protocycloceras lamarcki †Protocycloceras xerxes †Protodouvillina...
- perchaensis †Probillingsites †Probillingsites kessleri †Productella †Protocycloceras †Protocycloceras manitouense †Pseudochaetes †Pseudochaetes similis †Psygmophyllum...
- soleniformis – or unidentified comparable form †Protocycloceras †Protocycloceras arkansaense †Protocycloceras smithvillense †Pseudagnostus †Pseudagnostus...