Monotreme - Wikipedia
Monotremes are typified by structural differences in their brains, jaws, digestive tract, reproductive tract, and other body parts, compared to the more common mammalian types. Although they are different from almost all mammals in that they lay eggs, like all mammals, the female monotremes nurse their young with milk.
单孔目 - 维基百科，自由的百科全书
单孔目 （學名：Monotremata）是 哺乳纲 的一 目，僅分布於大洋洲的澳大利亚和 新幾內亞，因排泄管道和生殖管道末端的開口合為一 泄殖孔 而得名。. 牠們以独特的卵生加哺乳的方式繁育後代，為现生哺乳动物中最原始的类群，演化曆史可追溯至 白垩纪 早期，有 ...
Monotreme | Definition, Characteristics, Reproduction, Examples ...
Monotreme, any member of the egg-laying mammalian order Monotremata, which includes the amphibious platypus and the terrestrial echidnas of continental Australia, the Australian island state of Tasmania, and the island of New Guinea. It is the most ancient living order of mammals.
单孔目 - 百度百科
物种概述. 播报. 编辑. 单孔目：哺乳纲的一目，最低等的哺乳动物。. 卵生。. 肠和尿殖管共同开口于泄殖腔，由一共同的孔通体外，故名“单孔目”。. 乳腺管开口于腹部两侧的乳腺区而无乳头；体有毛被；体温较低但具有调节体温的能力。. 如鸭嘴兽、针鼹等 ...
Overview of the Animals Called Monotremes - ThoughtCo
2019年6月5日 · Monotremes (monotremata) are a unique group of mammals that lay eggs, unlike placental mammals and marsupials, who give birth to live young. Monotremes include several species of echidnas and the platypus.
Monotreme - Definition, List, Examples, Characteristics, & Picture
2024年7月9日 · These mammals derive their name from the Greek word monotreme, which means ‘single opening.’. This term refers to the single duct or cloaca that serves as the common exit point for their urinary, defecatory, and reproductive systems.
University of California Museum of Paleontology
Information about monotremes, including their evolution, characteristics, and examples of species.
What is a Monotreme? Monotremes Explained - A-Z Animals
2023年4月13日 · What is a Monotreme? Monotremes are members of the Monotremata suborder of prototherian mammals. Along with placentals and marsupials, they are one of the three subgroups of today’s living mammals.
monotreme - Students | Britannica Kids | Homework Help
The only mammals that lay eggs, rather than giving birth to live young, are the monotremes. These animals make up the scientific order Monotremata, the most ancient living order of mammals.
Monotreme - New World Encyclopedia
Monotremes are egg-laying mammals of the order Monotremata, the only order in Subclass Monotremata (or Prototheria). Monotremes represent one of the three major subdivisions of mammals. The other two groups, the marsupials (Marsupialia or Metatheria) and placentals (Placentalia or Eutheria) give birth to live young.