ichthyopsidan.
/ɪkθɪˈɒpsɪdə/ Zoology.
With plural agreement. The lowest of the three primary groups of Vertebrata in Huxley's classification, comprising the branchiate vertebrates, i.e. the amphibians or batrachians, the fishes, and fish-like vertebrates.
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ichthyopsida1871
1871 T. H. Huxley Man. Anat. Vertebrated Animals iii. 112 The Vertebrata are divided into three primary groups or provinces: the Ichthyopsida, the Sauropsida, and the Mammalia.
1872 St. G. Mivart Lessons Elem. Anat. ii. 43 All Vertebrates above the Ichthyopsida.
1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 432 Class Cyclostomi..Elongated Eel-like Ichthyopsida, with the mouth not supported by jaws as in other Vertebrata.
Derivatives
ichthyˈopsid adj. and n. (a) adj. of or belonging to the Ichthyopsida; (b) n. a vertebrate of this group.
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the world > animals > vertebrates > [adjective] > relating to ichthyopsida
ichthyopsid1871
ichthyopsidan1887
1871 T. H. Huxley Man. Anat. Vertebrated Animals ii. 75 The spinal accessory exists in no Ichthyopsid vertebrate.
ichthyˈopsidan adj. and n. (also ichthyopˈsidian) = ichthyopsid adj. and n.
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the world > animals > vertebrates > [adjective] > relating to ichthyopsida
ichthyopsid1871
ichthyopsidan1887
1887 J. Cleland in Nature 24 Feb. 391/1 There were two kinds of protovertebrates, namely, piscine and reptilian—or ichthyopsidan and sauropsidan, as Prof. Parker would probably prefer to call them.
This entry has not yet been fully updated (first published 1899; most recently modified version published online March 2019).
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n.1871