heterostracan / ˌhɛt əˈrɒs trə kən /

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heterostracan 的定义

n. 名词 noun

Paleontology.

  1. any of several ostracoderms of the order Heterostraci, from the Silurian and Devonian Periods, having the anterior part of the body enclosed in bony plates.

更多heterostracan例句

  1. Older than the latter is the heterostracan, Pteraspis, and Cyathaspis.
  2. The best known of the Heterostracan families is that of Pteraspidæ.