| 释义 |
heterocercal, a.|-ˈsɜːkəl|
[f. as prec. + -al1.]
Having the lobes of the tail unequal. Opp. to homocercal.
1838Penny Cycl. XII. 191/1 Heterocercal, the term chosen by M. Agassiz..to express a peculiar form of the tails of fishes..The tail is..unequally bilobate, as in the shark... The peculiarity of the Heterocercal fishes is that the vertebral column runs along the upper caudal lobe. 1851Richardson Geol. (1855) 133 The heterocercal character of the tail.
Hence heterocerˈcality, ˈheterocercy |-sɜːsɪ|, the condition of being heterocercal.
1884Science 3 Oct. 341/2 Whenever heterocercality manifests itself, there is degeneration of the caudal end of the chordal axis. |