贵州龙属于爬行纲双孔亚纲鳍龙目肿肋龙科的一个成员，是一种海生爬行动物，主要产自贵州西部和云南东部地区中三叠统（两亿多年前）地层中。在这里贵州龙与幻龙、鸥龙、纯信龙和黔鱼龙以及大量鱼类共同生活，其数量丰富，目前已经发现了千余件标本。贵州龙成年个体体长20-30厘米，以一些小动物为食，同时也是幻龙等大型爬行动物的食物。贵州龙以卵胎生的方式生育后代，即将卵在体内孵化，直接生产小贵州龙。
Keichousaurus is a member ofReptilia Diapsida Eosauropterfygia Pachypleurosauridae. It isthe marine reptile and mainly produced in thestratum of western region of Guizhou and eastern region of Yunnan during the period of Middle Triassic (two hundred million years ago). Herekeichousaurus lives together with a large amount of different fishes such as nothosaur, lariosaurus, pistosaurus and qianichthyosaurus. The quatity is large and now thousands ofspecimens were found. The body length of an adult keichousaurus is 20-30cm and keichousaurus dines on small animals and at the same time is the food of some largereptiles such asnothosaurs.eichousaurus give births in form ofovoviviparitye, which means the eggs will be incubated inside the body and directly deliver the birth of smallkeichousaurus.
关岭古生物化石形成于距今2.2亿年的晚三叠纪，主要有鱼龙、鳍龙、楣齿龙等海生爬行动物，也有千姿百态的海百合、菊石、双壳、牙形石、鹦鹉螺、腕足动物，此外还有裸子植物和蕨类植物的化石。其中，海生爬行动物化石和海百合数量巨大、种类繁多、保存精美，是全球晚三叠世独一无二的海洋生物化石库。对于研究晚三叠世的古生物学、古生态学、古海洋学、古埋藏学和地层学等有非常重要的的科学意义。
Guanling paleontological fossils formed 220 million years ago in the late Triassic. They mainly includes Ichthyosauria, Brachypterygius, placodont and other marine reptiles, and there are also numerous crinoidea, magnesia, bivalvia,pearly nautilus, brachiopods as well as the fossils of gymnosperms and ferns. Among them, the marine reptile fossils and the crinoideas there are numerous and in a wide range. They are in different species and well preserved. Guanling biota is the world's unique marine fossil library of late Triassic . It is of a great scientific significance to paleontology, palaeoecology, paleoceanography, ancient taphonomyand stratigraphy studies of the Late Triassic.
研究表明，关岭地区在晚三叠世为海湾环境，并逐渐由浅海陆棚向局限盆地演化。晚三叠世的印支构造运动使海湾封闭，海水处于缺氧状态，后褶皱抬升为陆地，这是导致关岭生物群消失的主要原因。
Studies have shown that the Guanling area was in bay environment in the Late Triassic and gradually evolved the shallow continental shelf to the confined basin. The indo-china orogeny of late Triassic enclosed the bay, and the sea water was anoxic. And then the folds were uplifted to land, which was the main reason of the disappearance of the Guanling biota.
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