| 词汇 | theropod |
| 释义 | theropod noun[ C ] uk /ˈθɪə.rə.pɒd/ us /ˈθɪr.ə.pɑːd/(also theropod dinosaur) a type of dinosaur that walked on its back legs and had short front legs: 兽脚亚目恐龙（前肢小，主要用后肢行走） Theropods and birds share many anatomical features.在解剖学上，兽脚亚目恐龙跟鸟类有很多相似特征。 Theropod dinosaurs include meat-eaters like Tyrannosaurus rex.兽脚亚目恐龙包括像霸王龙那样的食肉恐龙。 Theropods usually had teeth in the front jaws. The theropods were carnivores with a lightweight skeleton. The footprint shape and narrowness of the tracks clearly indicated this was a theropod dinosaur. Prehistory anatosaurus apatosaurus Australopithecus brachiosaurus broch henge Holocene ice age ichthyosaur iguanodon Permian Phanerozoic pictograph Pleistocene Pliocene quern raptor Silurian standing stone stegosaurus Examples of theropodtheropod I looked in vain for the terms theropod, cynodont and perissodactyl and yet some 10% of the definitions are apparently devoted to palaeontology. The specimen, which has historical significance, has been erratically attributed to either a sauropod or a theropod on the basis of vague phenetic resemblances. For these characters, ornithischians, theropods, and prosauropods retain the plesiomorphic condition. This ridge might represent a remainder of the low crest that connects the fibular crest with the proximal end in basal theropods. This work is required reading for anyone working on theropods or with an interest in dinosaur evolution. Rauhut ends this work with a discussion of what the analysis means for theropod phylogeny as a whole. Janensch (1920, 1925) described several taxa of large theropod, all based on very fragmentary material. Then there is, for my palate, a tiny nugget - a short squib describing a theropod sternal plate (chest bone), that immediately rang recognition bells for me! The relevant surfaces are eroded so it cannot be determined if the attachment of the orbitosphenoid was loose, as in prosauropods, or firm or fused, as in theropods and sauropods. The snout itself is laterally compressed, a feature shared with other terrestrial reptiles such as theropod dinosaurs. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It was about 6to7 m long and 460 kg in weight, making it one of the largest theropods of its time. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As is typical of theropods, the feet were tridactyl (with three clawed weight-bearing toes). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The early sauropodomorphs were most likely omnivores as their shared common ancestor with the other saurischian lineage (the theropods) was a carnivore. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Fossil theropod tracks have been reported from the formation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Herrerasaurids were small-sized (not more than 4 m long) carnivorous theropods or basal saurischians. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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