Conlinoceras [SEP] parent taxon
Conlinoceras
Conlinoceras, once included with "Calycoceras" as the subgenus "Calycoceras (Conlinocras)", is a strongly ribbed, evolute ammmonite, belonging to the acanthoceratid subfamily Acanthoceratinae, known from the Cenomanian stage of the Upper Cretaceous. Shells are generally rapidly expanding with prominent, wide spaced, straight radial ribs that cross over the arched venter without interruption. Although somewhat similar in appearance to "Calycoceras", "Conlinoceras" differs in having sparser, more widely spaced ribs.
The first (lowest) appearance of "
†"Conlinoceras"
- †"Conlinoceras tarrantense"
- "Conopeum" – tentative report
- †"Continuoolithus"
- "Corbula"
- †"Corbula kanabensis" – or unidentified comparable form
- †"Crassatellina"
- †"Crassatellina oblonga"
- "Crassostrea"
- †"Crassostrea soleniscus"
- †"Cremnoceramus"
- †"Cremnoceramus rotundatus"
- †"Cretodus"
- †"Cretodus arcuata"
- †"Cretodus semiplicatus"
- †"Cretolamna"
- †"Cretolamna appendiculata"
- †"Cribratina"
- †"Cribratina texana"
- †"Crosbysaurus"
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