Heterostraci

Among the most primitive heterostracans are tolypelepids (top right). Most heterostracans are pteraspidiforms, such as the pteraspidids (bottom right), doryaspidids (bottom left) and the huge psammosteids (top left), which are the youngest known members of the group.[1]

Heterostraci ("Different scales") is an extinct subclass of pteraspidomorph jawless vertebrate that lived primarily in marine and estuary environments. The first identifiable heterostracans appear in the fossil record during the early Silurian, and all, save for the Psammosteids, became extinct by the start of the late Devonian. This last group of heterostracans died out in the extinction event at the end of the Devonian.

单词	Heterostraci
释义	Heterostraci /ˌhetə'rɔstrəkai/ 英汉-汉英词典异甲类词组 \| 习惯用语您要查找的是不是： heterozygous adj. 杂合的 heterosexual n. 异性恋者 adj. 异性恋的 heterostructure n. [电子]异质结构 stratospheric adj. 同温层的 Heterostraci n. 异甲亚纲；[古生] 异甲类英语百科 Heterostraci Heterostraci ("Different scales") is an extinct subclass of pteraspidomorph jawless vertebrate that lived primarily in marine and estuary environments. The first identifiable heterostracans appear in the fossil record during the early Silurian, and all, save for the Psammosteids, became extinct by the start of the late Devonian. This last group of heterostracans died out in the extinction event at the end of the Devonian. 近义、反义、联想词近义词 n. animal order
随便看	coactivate coactivated coactivation co activation coactivator coactive coactively coactive pattern coactivities coactivity coactor coactors coactosin coactualization coactus coad. Coad co adaptation coadaptation coadapted coadapted gene complex coadapted gene complexes coadd coadded coaddict

Heterostraci /ˌhetə'rɔstrəkai/

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Heterostraci

近义词