英语词汇“selachian”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

selachian

/sɪˈleɪkɪən

Zoology

noun

An elasmobranch fish of a group that comprises the sharks and dogfishes.

The former group Selachii, subclass Elasmobranchii: now treated as one, two, or three superorders.

Those produced by the hypochordal lobe of the caudal fin of selachians and early bony fishes have been studied in detail....

Fish included many elasmobranchs as well as osteichthyes such as palaeoniscoids, dipnoi, selachians, and crossopterygians, together with the ancient acanthodians.
Lack of neural spine is consistent with selachians (a group of vertebrates which includes sharks and rays).

adjective

Relating to the selachians.The A. alatus specimens were collected from tuffaceous fine-grained sandstones that overlay the very fossiliferous yellowish tuffs containing abundant remains of bivalves, echinoids, whale vertebrae, and selachian teeth.

Origin

Mid 19th century: from modern Latin Selachii (from Greek selakhos 'shark') + -an.

单词	selachian
释义	selachian /sɪˈleɪkɪən / Zoology noun An elasmobranch fish of a group that comprises the sharks and dogfishes. The former group Selachii, subclass Elasmobranchii: now treated as one, two, or three superorders. Those produced by the hypochordal lobe of the caudal fin of selachians and early bony fishes have been studied in detail.... Fish included many elasmobranchs as well as osteichthyes such as palaeoniscoids, dipnoi, selachians, and crossopterygians, together with the ancient acanthodians. Lack of neural spine is consistent with selachians (a group of vertebrates which includes sharks and rays). adjective Relating to the selachians.The A. alatus specimens were collected from tuffaceous fine-grained sandstones that overlay the very fossiliferous yellowish tuffs containing abundant remains of bivalves, echinoids, whale vertebrae, and selachian teeth. Origin Mid 19th century: from modern Latin Selachii (from Greek selakhos 'shark') + -an.
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