Proteoceratidae is an extinct family of actively mobile aquatic carnivorous cephalopods belonging to the subclass Orthoceratoidea endemic to what would...
4 KB (273 words) - 00:40, 7 May 2023
later Pseudorthoceratidae and Middle Ordovician to Middle Silurian Proteoceratidae. Both have siphuncles that are partly cyrochoanitic with expanded segments...
4 KB (378 words) - 00:40, 21 May 2024
Baltoceratidae Clinoceratidae Engorthoceratidae Geisonoceratidae Lamellorthoceratidae Orthoceratidae Proteoceratidae Stereoplasmoceratidae Paraphragmitidae...
10 KB (1,019 words) - 11:12, 24 December 2023
Treptoceras is a fossil cephalopod genus included in the orthocerid family Proteoceratidae. It has been found in Ordovician rocks dated from about 460.9 to 445...
1 KB (61 words) - 02:57, 27 February 2022
Ordovician Kullsberg Limestone Formation Sweden A member of the family Proteoceratidae. Genus includes new species C. thornquisti. Danoceras skalbergensis...
210 KB (9,569 words) - 02:40, 27 June 2024
Orthoceratidae, which might be taken to indicate a relationship to the Proteoceratidae. Evans (2000) considered Sactoceras to be an orthocerid, placing it...
4 KB (439 words) - 19:38, 27 October 2022
fossil nautiloid cephalopod genus included in the orthocerid family Proteoceratidae. It has been found in Ordovician rocks dated from about 478.5 to 468...
2 KB (111 words) - 21:37, 18 December 2023