agnathとは 意味・読み方・使い方

発音

• enPR: ăgʹnəth, IPA: /ˈæɡ.nəθ/

名詞

agnath (plural agnaths)

1. (zoology) An agnathan.
   • 1979, Stephen C. Wood, Evolution of Respiratory Processes, Marcel Dekker,, →ISBN, page 218:

     Evolution of vertebrates was accompanied by a gradual increase in oxygen availability, from the irrespirable atmosphere of the Precambrian to a PO₂ at 7 mmHg with the first vertebrates (agnaths), to the present sea level PO₂ value of 160 mmHg with the first reptiles.

   • 1996, George Christopher Williams, Adaptation and Natural Selection, Princeton University Press,, →ISBN, page 51:

     The gnathostomes almost entirely replaced the agnaths, presumably because they were more effective fishes.

   • 2002, Harold J. Morowitz, The Emergence of Everything, Oxford University Press, →ISBN, page 113:

     Thus, although tunicates are presumably intermediate between flatworms and agnaths, the larval tunicate more closely resembles the flatworm and adult agnath.

アナグラム

• ghanta, Thanga