Aetosaurs (/ eɪˌɛtoʊˈsɔːr /) are heavily armored reptiles belonging to the extinct order Aetosauria (/ eɪˌɛtoʊˈsɔːriə /; from Greek, ἀετός (aetos, "eagle") and σαυρος (sauros, "lizard")).

Aetosaurus was a small, primitive aetosaur. Unlike more derived aetosaurs such as Desmatosuchus or Typothorax, the carapace was long and narrow and lacked spikes. The paramedian scutes that covered the back (with one row on each side of the vertebrae) are considerably wider than they are long.

堅蜥目 （Aetosauria）又名 恩吐龍亞目，意思是「老鷹蜥蜴」，其下只有一科 鍬鱗龍科 （Stagonolepididae），是一群已滅絕植食性 主龍類 演化支，身上有重骨板、體型由中到大，生存於 三疊紀 晚期。 牠們的頭部與巨大身體比是相當小的，頭部外型上有獨特點，前部平坦且鈍狀，類似 豬 的口鼻部。 鑿狀的牙齒是小型、類似葉狀，顯示牠們是植食性動物，但類似豬的牙齒與角質性的口鼻部已在至少一個物種上發現，並被描述成以群居 昆蟲 為食。 在堅蜥類腦殼方面 …

坚蜥目（Aetosauria），意思是“老鹰蜥蜴”，唯一一科锹鳞龙科（Stagonolepididae），是一群已灭绝草食性主龙类演化支，身上有重骨板、体型由中到大，生存于晚 三叠纪。 它们的头部与巨大身体比是相当小的，头部外型上有独特点，前部平坦且钝状，类似猪的口鼻部。 凿状的牙齿是小型、类似叶状，显示它们是草食性动物，但类似猪的牙齿与角质性的口鼻部已在至少一个物种上发现，并被描述成以群居昆虫为食。 在坚蜥类脑壳方面的研究，显示它们与鳄形超目关系密切。 …

Aetosaurs were heavily armoured reptiles in the extinct order Aetosauria. They were medium- to large-sized pseudosuchians. They were omnivorous or herbivorous. The aetosaurs were archosaurs more closely related to crocodilians than to dinosaurs. All known aetosaurs lived in the Upper Triassic. In some strata they are quite common.

Other lineages include the aetosaurs (“eagle lizards”), a group of herbivorous quadrupedal species that lived during the Late Triassic (229 million to 200 million years ago), the ornithosuchians (“bird crocodiles”), the rauisuchids (“Rau’s crocodiles”), and several single, ungrouped taxa.

Aetosauriformes is an extinct clade of early-diverging pseudosuchians (the group of archosaurs that contains modern crocodylians and their stem group relatives).

Aëtosaurs ranged in size from less than 1 to 4 or 5 meters, the average size being between 2.5 and 3 meters. They flourished for almost entire extent of the Late Triassic. A number of types are known, the best known genera being Aetosaurus, Stagonolepis, and Desmatosuchus.

2016年8月23日 · Aetosaurs or stagonolepidids (after the genus Stagonolepis) were remarkable and peculiar in many ways. Anatomically, they were highly specialised and their skeleton shows many adaptations to a primarily herbivorous lifestyle. They had small and pointed heads. Their snout was elongated and, depending on the taxon, more or less upturned.

Aetosaurus ferratus (Fraas 1877) Late Triassic, (~210 mya) 1.5 meters, was derived from a sister to Ticinosuchus at the base of a clade that included the other aetosaur, Stagonolepis. Aetosaurs are widely considerd herbivores due to their small, leaf-like teeth.