鲟形鱼类是古老的原始硬骨鱼类之一,其现生代表大多为濒危鱼类,如生活于长江的中华鲟、白鲟等.世界上发现的鲟形鱼类化石中,英国早侏罗世的软骨硬鳞鱼(Chondrosteus)是迄今为止时代最老的[1].在中国,近些年曾于冀北、辽西中生代地层发现鲟形鱼类化石,如北票鲟、燕鲟、原白鲟、 Sturgeon fish is one of the primitive primitive bony fishes, its present life representatives are mostly endangered fish, such as Chinese sturgeon and white sturgeon which live in the Yangtze River, etc. Among the sturgeon fishes found in the world, The world’s oldest chondrosteus is by far [1]. In China, in recent years, sturgeon-like fossils have been found in the Mesozoic strata of northern Hebei and western Liaoning, such as Beipiao sturgeon, The original white sturgeon,