请输入您要查询的字词:
单词
啮型类
释义
啮型类
Encyclopedia
理学
哺乳纲(化石)
释
glires
啮型类
最早由C.von林奈(1735)提出,初为对现生兔形类和啮齿类两类小型哺乳动物的合称,因为它们都发育有一对终生生长(无根)且具有“啃啮”(gnawing)功能的门齿(DI2/di2)。此外,它们也没有犬齿,前臼齿都很退化。有人建议将啮型类提升为啮型大目(Grandorder),定义为现生的啮齿类和兔形类的共同祖先及其后裔形成的支系。它包括了由啮齿目(Rodentia)和混齿目(Mixodontia,通常认为是啮齿类的基干类群)组成的单门齿类和由兔形目(Lagomorpha)及模鼠兔目(Mimotonida,通常认为是兔形类的基干类群)组成的双门齿类。
随便看
exchanges of water science and technology between China and other countries
exchange sort
exchange spectroscopy
exchange spectroscopy (EXSY)
exchange symmetry
exchange theorem
exchange value
exchanging
exchanging documents of mining survey
exchanging exhibition
Excicon
excimer
excimer-excimer annihilation
excimer fluorescence
excimer laser
excimer laser coronary angioplasty
excimer laser coronary angioplasty, ELCA
excimer laser, exciplex laser
exciplex
exciplex fluorescence
exciplex laser
excipulum
excircle
excision
excision axiom
科学参考收录了854744条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。
Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号
更新时间:2026/6/19 20:29:18