骨形态的多变量分析为地球肌状动物的分类学和进化提供了信息
Lily A Noftz1, Jonathan J M Calede1,2
1Biology Program, The Ohio State University at Marion, 1459 Mount Vernon Avenue, Marion, OH 43302, USA.
Current zoology
|August 24, 2023
概括
形类动物的头骨形态显示了家族,属和物种层面的显著差异. 这项研究量化了大小和形状的变化,提供了对动物进化和多样化的见解.
科学领域:
- 动物学 动物学
- 进化生物学 进化生物学
- 形态测量 形态测量 形态测量
背景情况:
- 形态学分析对于理解表型变异,分类学和进化模式至关重要,特别是在诸如地质肌状动物等多样化的群体中.
- 地形类动物,包括口袋 (Geomyidae) 和袋鼠/口袋老鼠 (Heteromyidae),是北美物种丰富的家族.
研究的目的:
- 为了测试在家族,属和物种层面上在地质动物之间骨大小和形状的统计学上显著的差异.
- 量化骨形态变化在内和之间Geomyidae和Heteromyidae.
主要方法:
- 分析了886个标本,这些标本代表了所有地质体属和39个物种.
- 用于尺寸比较的几何平均值;用于形状比较的尺寸规范的14个头骨和下的测量.
- 生物形态空间分析,以评估头骨形状的进化趋势.
主要成果:
- 头骨测量有效地在家族,属和物种层面上区分Geomyoids.
- 吉奥米科的尺寸变化比海特罗米科更大.
- 地质类骨表现出负方位,而异质类骨表现出正方位,在异质类体内有不同的图案.
结论:
- 头骨形态为地球肌状动物提供了强大的分类学歧视因素.
- 头骨形状的全度图案在Geomyidae和Heteromyidae之间有显著差异,反映了不同的进化轨迹.
- 需要采用化石数据进行进一步的研究,以充分阐明地质肌体的进化历史.
相关概念视频
01:08Overview of the Skull
4.7K
The cranium (skull) is the skeletal structure of the head that supports the face and protects the brain. It is subdivided into the facial bones and the brain case, or cranial vault. The facial bones underlie the facial structures, form the nasal cavity, enclose the eyeballs, and support the teeth of the upper and lower jaws.
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
4.7K
01:22Sutures of the Skull
6.9K
The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
6.9K
01:27Cranial Bones: Lateral View
2.3K
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...
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...
2.3K