pteraspidn.adj.

Brit.

/təˈraspɪd/, U.S.

/təˈræspəd/

Origin: A borrowing from Latin. Etymon: Latin Pteraspis.

Etymology: < pteraspid- , taken as stem of scientific Latin Pteraspis Pteraspis n.: see -id suffix³. Compare scientific Latin Pteraspidae , former family name (E. W. Claypole 1885, in Q. Jrnl. Geol. Soc. 41 56). Compare earlier pteraspidian n., pteraspidian adj.

Palaeontology.

A. n.

An armoured, jawless fossil fish (ostracoderm) of the family Pteraspididae (formerly Pteraspidae), found in rocks of the Silurian and Devonian periods.

ΚΠ

1884 E. W. Claypole in Amer. Naturalist 18 1224 The most conspicuous of these [points of structure] is the regularity and parallelism of the vessels in the outer layer, a feature not shown in any already described species of Pteraspid.

1902 Science 7 Nov. 749/2 Among the Ostracoderms he believes that the Pteraspids have retained a larval character, whereas the Asterolepids have become somewhat more specialized.

1990 Paleobiology 16 355/1 Though morphologically primitive, pteraspids were well-defined vertebrates with a high degree of cephalization.

2000 H. Gee Deep Time ii. 58 The arrangement of structures inside the heads of pteraspids was found to have much in common with equivalent features in lampreys.

B. adj.

Of, relating to, or characteristic of the family Pteraspididae.

ΚΠ

1935 Amer. Midland Naturalist 16 816 As at Blacksmith's Fork, pteraspid ostracoderms and primitive arthrodires are found in marine waters.

1988 Jrnl. Paleontol. 62 959/2 Typical pteraspid ridged ornament is present in sample UCR 9415.

This is a new entry (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	pteraspid
释义	pteraspidn.adj. Brit. /təˈraspɪd/, U.S. /təˈræspəd/ Origin: A borrowing from Latin. Etymon: Latin Pteraspis. Etymology: < pteraspid- , taken as stem of scientific Latin Pteraspis Pteraspis n.: see -id suffix³. Compare scientific Latin Pteraspidae , former family name (E. W. Claypole 1885, in Q. Jrnl. Geol. Soc. 41 56). Compare earlier pteraspidian n., pteraspidian adj. Palaeontology. A. n. An armoured, jawless fossil fish (ostracoderm) of the family Pteraspididae (formerly Pteraspidae), found in rocks of the Silurian and Devonian periods. ΚΠ 1884 E. W. Claypole in Amer. Naturalist 18 1224 The most conspicuous of these [points of structure] is the regularity and parallelism of the vessels in the outer layer, a feature not shown in any already described species of Pteraspid. 1902 Science 7 Nov. 749/2 Among the Ostracoderms he believes that the Pteraspids have retained a larval character, whereas the Asterolepids have become somewhat more specialized. 1990 Paleobiology 16 355/1 Though morphologically primitive, pteraspids were well-defined vertebrates with a high degree of cephalization. 2000 H. Gee Deep Time ii. 58 The arrangement of structures inside the heads of pteraspids was found to have much in common with equivalent features in lampreys. B. adj. Of, relating to, or characteristic of the family Pteraspididae. ΚΠ 1935 Amer. Midland Naturalist 16 816 As at Blacksmith's Fork, pteraspid ostracoderms and primitive arthrodires are found in marine waters. 1988 Jrnl. Paleontol. 62 959/2 Typical pteraspid ridged ornament is present in sample UCR 9415. This is a new entry (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.adj.1884
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