pteraspidianadj.n.
/ˌtɛrəˈspɪdɪən/, U.S. /ˌtɛrəˈspɪdiən/ Palaeontology. Now rare.
A. adj.
= pteraspid adj.
ΘΚΠ
the world > animals > fish > class Osteichthyes or Teleostomi > subclass Actinopterygii > [adjective] > ganoid > of fossil or extinct types of
pycnodont1836
cephalaspean1854
cephalaspidean1872
pteraspidian1872
platysomid1878
1872 W. S. Symonds Rec. Rocks vii. 257 Remains of Pteraspidean fishes.
1887 Athenæum 4 June 741/2 A canal system..in the shields of pteraspidian fishes.
1933 Proc. Amer. Philos. Soc. 72 287 Collections of undescribed Pteraspidian fishes made by various Norwegian expeditions to Spitsbergen.
B. n.
= pteraspid n.
ΚΠ
1877 A. S. Woodward in Proc. Zool. Soc. 480 Neither here [sc. in a specimen of Holaspis] nor in any other Pteraspidian have distinct traces of the pores been detected upon the rostral region in advance of the ‘orbital’ notches or apertures.
1892 Q. Jrnl. Geol. Soc. 48 542 (title) On the structure of the American pteraspidian, Palæaspis (Claypole); with remarks on the family.
1918 H. F. Osborn Origin & Evol. Life vi. 166 In Upper Silurian time the ostracoderms attain the slow, armored, bottom-living stage of evolution, typified in the pteraspidians and cephalaspidians.
This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).
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adj.n.1872- to index out
- to indulge in
- to indulge to
- to infer exclamation, make exclamation against
- to infinite
- to infinite it
- to infinity
- to inform the peace
- to inkhornize it
- to inquire after
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- to instore a battle
- to integrate by parts
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- to interpret words to wicked face
- to into the etc utterance
- to into the such utterance
- to into the utterance
- to intr, to have, so many wallops
- to introduce into or to the acquaintance of
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- to introduce to
- to invert possession
- to invest oneself into