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词汇 sphenocephalus
分类 英语词汇 英语翻译词典
释义

sphenocephalus

英汉-汉英词典
n. 楔形头畸胎
词组 | 习惯用语
您要查找的是不是:
  • encephalitis n. 〈医〉脑炎
  • encephalopathy n. [医]脑病
  • hydrocephalus n. [医]脑水肿;脑积水

网络短语:
sphenocephalus 楔形头畸胎; 楔形头;
Neotermes sphenocephalus 楔头新白蚁
英语百科

Sphenocephalus

Sphenocephalus is an extinct genus of ray-finned fish that lived during the Cretaceous period. Fossils have been found in England and Italy.

Sphenocephalus was about 20 centimetres (8 in) long, with a rather large head, and may have resembled a modern black bass in appearance. It was one of the earliest fish to have the pelvic fins placed beneath th pectoral fins, a common feature in modern fish that improves swimming manoeuvrability. Like the modern trout-perches, it possessed a mixture of modern and primitive features, and it was probably one of the earliest perciform fish.

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