| 释义 |
epichordal, a. Anat.|ɛpɪˈkɔːdəl|
[f. epi- + chord + -al1.]
Situated upon or about the intercranial part of the notochord: applied to certain segments of the brain.
[a. G. epichordal (C. Gegenbaur Untersuchungen zur vergleichenden Anat. d. Wirbelsäule bei Amphibien Reptilien (1862) v. 22): see epi-, chordal a.] Situated, originating, or occurring on the dorsal side of the notochord. Cf. perichordal adj. s.v. peri-.
1881F. M. Balfour Treat. Compar. Embryol. II. xviii. 458 In these genera [of Anura] the formation of the vertebra takes place almost entirely on the dorsal side of the notochord... The type of formation of the vertebral column in these genera has been distinguished as epichordal in contradistinction to the more normal or perichordal type. 1909E. S. Goodrich in R. Lankester Treat. Zool. IX. 104 A caudal fin formed of a dorsal (epichordal) and a ventral (hypochordal) lobe. 1959Q. Rev. Biol. XXXIV. 15/2 The definitive centrum is wholly dorsal to the notochord, thus ‘epichordal’. 1977Fieldiana Geol. XXXIII. 534 The heterocercal caudal fin with an epichordal contribution are strikingly different than other paraselachii. |