| 词条 | Rubidgeinae |
| 释义 |
|fossil_range = {{Fossil range|Late Permian}} |image = Rubidgea head12DB.jpg |image_caption = Reconstruction of Rubidgea atrox |taxon = Rubidgeinae |authority = |subdivision_ranks = Genera |subdivision ={{extinct}}Aelurognathus {{extinct}}Clelandina {{extinct}}Dinogorgon {{extinct}}Leontosaurus {{extinct}}Rubidgea {{extinct}}Ruhuhucerberus {{extinct}}Smilesaurus {{extinct}}Sycosaurus }}Rubidgeinae is an extinct subfamily of gorgonopsid therapsids known only from Africa. They were among the largest gorgonopsians, and their fossils are common in the Cistecephalus and Daptocephalus assemblage zones of the Karoo Basin. They lived during the Late Permian, and became extinct at the end of the Permian.[1] DescriptionRubidgeines were large, quadrupedal carnivores of the family Gorgonopsidae. Their largest teeth are their upper canines, which were blade-like and had well-developed serrations. Their postcanine teeth were small and conical, but were also frequently serrated. Tooth replacement was rapid relative to basal therocephalians. Rubidgeines can be distinguished from other gorgonopsians by the absence of a blade-like parasphenoid bone and reduced or absent preparietal bone. The jugal bone, while narrow in most gorgonopsians, was often broadly expanded in rubidgeines.[1] PaleobiologyRubidgeines were among the largest gorgonopsians known, and the largest known from Africa. They were also the largest predators in their environment. Their massive canines and serrated teeth indicate that they were adapted for macropredation. The robust skull roof and supraorbital bosses of rubidgeines likely acted to protect the skull from the stress inflicted during prey capture, and similar morphology has been seen in many other macropredators in the fossil record, including theropod dinosaurs. The presence of this skull morphology is one of multiple adaptations seen in predators that utilize the skull, rather than the limbs, in prey capture.[1] Classification and systematicsBelow is a cladogram by Kammerer et al. in 2016.[1] {{clade| style=font-size:100%; line-height:100%|label1=Rubidgeinae |1={{clade |1=Smilesaurus ferox |2={{clade |1=Aelurognathus tigriceps |2={{clade |1=Ruhuhucerberus haughtoni |2={{clade |1={{clade |1=Sycosaurus laticeps |2=Sycosaurus nowaki |label2=Rubidgeini |2={{clade |1=Leontosaurus vanderhosti |2={{clade |1=Dinogorgon rubidgei |2={{clade |1=Rubidgea atrox |2=Clelandina rubidgei }} }} }} }} }} }} }} }} References1. ^1 2 3 {{cite journal |first1 = Kammerer|last1 = Christian F.|date= January 26, 2016 |title= Systematics of the Rubidgeinae (Therapsida: Gorgonopsia) |url=https://peerj.com/articles/1608/ |journal= PeerJ|pmid=26823998 |doi=10.7717/peerj.1608 |volume=4 |pmc=4730894 |page=e1608}} {{Gorgonopsia}}{{Taxonbar|from=Q21293518}} 4 : Gorgonopsia|Permian extinctions|Prehistoric vertebrate subfamilies|Tetrapod subfamilies |
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