相关实验视频

Updated: Jun 2, 2025

Using Enclosed Y-Mazes to Assess Chemosensory Behavior in Reptiles

Using Enclosed Y-Mazes to Assess Chemosensory Behavior in Reptiles

Published on: April 7, 2021

头部和尾部:近北极双蛇的比较骨科研究

Roberta Azeredo Murta-Fonseca^1,2, Daniel Silva Fernandes^2,3, Angele Martins^2,4

¹Laboratório de Zoologia, Campus do Pantanal, Universidade Federal de Mato Grosso do Sul, Corumbá, Mato Grosso do Sul, Brazil.

Journal of morphology

|January 16, 2025

概括

这项研究详细介绍了近北极二蛇的头骨和脊椎骨质. 它提供了关键的解剖数据,以了解它们复杂的进化历史和关系.

科学领域:

类学类学类学类学
比较骨科比较骨科
进化生物学进化生物学

背景情况:

对于近北极二蛇,仅有有限的发表的头骨和脊椎骨科数据.
现有的文献往往侧重于化石物种,忽视现存的种类.
这个群体的遗传学历史是复杂的和辩论.

研究的目的:

为了提供近北极二类物种的详细,比较的骨科描述.
为了研究头骨和椎的形态变异.
在拟议的遗传学假设的背景下探索这些变异.

主要方法:

对69个干燥保存的标本进行了检查.
高分辨率计算机断层扫描 (CT) 扫描用于详细的骨科分析.
头骨和脊椎元素的比较形态分析.

主要成果:

详细的骨质学描述近北极二西头骨和脊椎.
在头骨和椎中发现了形态变异.
两个超原体群体表现出独特的形态特征,支持了一些先前的遗传学建议.

结论:

这项全面的骨科研究增强了对近北极二类生物进化的理解.
这些发现为未来对这些蛇的遗传学和系统研究提供了基础.
详细的骨科数据,包括种内变异,对于进化研究至关重要.

关键词:

人体解剖学解剖学解剖学进化演化演化演化演化演化演化演化形态学形态学形态学头骨头骨头头骨头骨头骨头骨头骨脊椎脊椎是指脊椎的部分.

更多相关视频

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish

Published on: April 6, 2019

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton

Published on: May 7, 2016

相关概念视频

Convergent Evolution

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.

Phylogeny

Phylogeny

Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.

What is a Species?

What is a Species?

Testing a Claim about Mean: Unknown Population SD

Testing a Claim about Mean: Unknown Population SD

A complete procedure of testing a hypothesis about a population mean when the population standard deviation is unknown is explained here.
Estimating a population mean requires the samples to be approximately normally distributed. The data should be collected from the randomly selected samples having no sampling bias. There is no specific requirement for sample size. But if the sample size is less than 30, and we don't know the population standard deviation, a different approach is used;...

Cranial Bones: Lateral View

Cranial Bones: Lateral View

The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...

Phylogenetic Trees

Phylogenetic Trees

Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.