placentalia造句
例句与造句
- The most recent phylogenetic studies recover it as actually a paraphyletic assemblage leading to Placentalia.
- The older system was essentially the same, but used the names Monotremata, Marsupialia, and Placentalia.
- Viviparous mammals are in the subclass Theria; those living today are in the Marsupialia and Placentalia infraclasses.
- The date of divergence of " Protungulatum " and " Placentalia " is approximately 75 Ma.
- The Prototheria-Metatheria-Eutheria system has a number of miniscule differences from the Monotremata-Marsupialia-Placentalia system.
- It's difficult to find placentalia in a sentence. 用placentalia造句挺难的
- Eutheria was named in 1872 by Theodore Gill; in 1880 Thomas Henry Huxley defined it to encompass a more broadly defined group than Placentalia.
- The two infraclasses of Theria in the Prototheria-Theria system may also be " Marsupialia " and " Placentalia ".
- Huxley s system, in which The three subclasses are Prototheria, Metatheria, and Eutheria, rather than Monotremata, Marsupialia, and Placentalia.
- The function of this organ is probably to transfer nutrients from the mother; however the structure is small, compared to those of the Placentalia.
- Either because the last common ancestor of Placentalia was nocturnal and had no use for good color vision, or simply because it just so happened.
- In their 1997 " Classification of Mammals ", Malcolm McKenna and Susan Bell listed " Veratalpa " as a member of Placentalia of uncertain affinities.
- "' Trituberculata "'is an extinct group of animals existing in the fossil record from about 215 85 MYA . It contains the ancestors of Placentalia and Marsupialia; all modern mammals except Monotremata are descended from trituberculates.
- Each of the three may be defined as a total clade containing a living crown-group ( respectively the Monotremata, Marsupialia and Placentalia ) plus any fossil species which are more closely related to that crown-group than to any other living animals.
- Euarchontoglires is now recognized as one of the four major subclades within the clade Eutheria ( i . e ., placentalia ( placental mammals ) ), and it is usually discussed without a taxonomic rank but has been regarded as a cohort, magnorder, or superorder.
