Thekey difference在腹肌和突触之间diapsid is avertebratethat possesses two major holes known as temporal fenestrae in their skull, while synapsid is a vertebrate that possesses only one hole in each side of their skull around the temporal bone.
二尿和突触是两组羊水进化枝,其中包括chordates.Amnioteshave a temporal region in the skull that can either be solid or have openings. The major between diapsid and synapsid is the number of openings or holes (temporal fenestrae) present in the skull behind each eye. Diapsid has two temporal fenestrae in the skull while synapsid has one temporal fenestra in the skull behind each eye. Most reptiles and all birds are diapsids whereas mostmammalsare synapsids.
内容
1.Overview and Key Difference
2.什么是尿布
3.What is Synapsid
4.Similarities Between Diapsid and Synapsid
5。Side by Side Comparison –Diapsid vs Synapsid in Tabular Form
6。概括
什么是尿布?
A diapsid is any vertebrate with two major holes known as temporal fenestrae in their skull. The earliest known diapsid lived on the Earth about 300 million years ago. Most reptiles and birds belong to the group of diapsids, as they have two temporal holes in their skull. There are more than 14,600 extant species of birds and reptiles included in diapsids. That means; they are an extremely diversified group of animals, including crocodiles, lizards, snakes, tuatara, and birds. However, lizards and snakes have only one temporal hole in the skull, but their ancestors had two.

图01:尿不颅骨
此外,鸟类具有重组和现代化的头骨。这些鸟以及蛇和蜥蜴仍然属于尿不育的类别,因为它们的祖先有两个颞叶。这些最重要的孔位于眼睛上方和下方的头骨的两侧,每一侧的数量为四个。
这种骨骼布置的重要性在于它允许坚固而强大的肌肉依恋。因此,下颌肌肉可以从广泛张开的嘴里提供超级强大的咬合。鳄鱼将是解释颅骨骨骼及其对掠夺性生活的必要性的最好的例子。二灭绝的动物,例如恐龙,翼龙,圆斑龙等也是尿不育。根据尿不育的祖先头骨,下臂的骨头比孔的上臂骨长。
什么是突触?
Literally, the term synapsid means fused arch, and synapsids are a group of animals (vertebrates) including all the mammals and few other mammal-like reptiles. The distinguishing feature of synapsids is the presence of only one hole in each side of their skull around the temporal bone, which accounts for two holes in total. Synapsids have special types of teeth known as incisors, canines, and molars. The presence of different types of teeth has allowed these animals to be more versatile in feeding behaviours. Therefore, the ecological influences in feeding have been diversified across synapsids.

Figure 02: Synapsid Skull
当今的突触中也存在代谢,皮肤上的存在以及许多其他哺乳动物特征。但是,突触源于爬行动物之间,随着时间的流逝,它变得更加哺乳动物,爬行动物较少。
What are the Similarities Between Diapsid and Synapsid?
- Diapsids and synapsids are two groups of the amniotic clade.
- 这两个团体彼此分开的number of holes (temporal fenestrae) present in the skull behind each eye.
- 两组构成弦。
What is the Difference Between Diapsid and Synapsid?
Diapsid is a vertebrate that possesses two major holes known as temporal fenestrae in their skull while synapsid is a vertebrate that possesses only one hole in each side of their skull around the temporal bone. So, this is the key difference between diapsid and synapsid. Most reptiles and all the birds are diapsids while most mammals are synapsids.
Moreover, the diapsids can open their mouth wider and can give a stronger bite compared to the synapsids. Therefore, this is also a difference between diapsid and synapsid. Besides, one other significant difference between diapsid and synapsid is in their teeth types. Diapsids have only canines while synapsids have more teeth types, including incisors, canines, and molars. Additionally, a further difference between diapsid and synapsid is that the synapsids have more feeding niches than diapsids. But, taxonomic diversity is higher among diapsids than in synapsids.
摘要 - 二下与突触
羊膜在颅骨中有一个颞区,可以是固体或具有称为颞叶面的开口。基于这一点,有三组羊膜,作为anapsids,突触和尿布目。Anapsids没有时间fenestrae。突触后每只眼睛后面有一个颞叶塞斯拉。另一方面,乳糖在每只眼睛后面有两个颞叶。因此,这是尿不足和突触之间的关键区别。
Reference:
1. “Synapsid.” Wikipedia, Wikimedia Foundation, 28 June 2018,Available here.
2. “Diapsid.” Wikipedia, Wikimedia Foundation, 9 May 2019,Available here.
Image Courtesy:
1. “Skull diapsida 1” By derivative work: Gagea (talk)Skull_diapsida_1.png: Preto(m) – Skull_diapsida_1.png(CC BY-SA 3.0)viaCommons Wikimedia
2. “Skull synapsida 1″By derivative work: Gagea (talk)Skull_synapsida_1.png: Preto(m) – Skull_synapsida_1.png(CC BY-SA 3.0)viaCommons Wikimedia
发表评论