乌鳢骨骼系统的解剖

The Anatomy of Skeletal System of Snakeheaded Fish

乌鳢是一种适应性很强的经济鱼类．具有副呼吸器官，可直接利用空气中的氧气．该鱼同时具有背肋及腹肋．颌弓与脑颅为硬骨鱼中少有的双联型．脑颅的构成具眶蝶骨，此点和Ｄａｙ（１９１４）的结论不同．故此种鱼的骨骼系统具有重要的比较解剖学方面的价值．

Snakeheaded(Ophiocephalus argus) is a kind of economic fish which has a nice adaptability.One of the main characters of its skeletal system is that hyomandibular,exoccipital,prootic and part of the first gill arch have specialized and changed into a kind of respiratory organ to help respiration when leave water.It is a very rare case in Taleost that mandibular arch links with skull by epipterygoid and hyomandibular thus become amphistyly type.In addition,it has dorsal rib as well as ventral rib.Through several dissection we are sure that it has orbitosphenoid, on which we are in opposite to Day,A.L. who suggested that snakeheaded fish hasn’t orbilosphenoid.So the skeletal system of snakeheaded fish is of great value on comparative anatomy