dipnoan

/dip-noh-uhn/US // ˈdɪp noʊ ən //UK // (dɪpˈnəʊən) //

偶数

Definitions

adj.形容词 adjective

n.名词 noun

The name Dipnoan may, however, be retained as a vernacular equivalent of Dipneusti.
Structurally the amphibian heart closely resembles the dipnoan, though the increased size of the left auricle is an advance.
Interest notes on Dipnoan fin characters have been given by Traquair.
In every modern Dipnoan, Crossopterygian, and Ganoid the air-bladder has an effective pneumatic duct.
It is not unlikely that the Crossopterygian gave rise to Amphibian and Dipnoan alike.