相关实验视频
Updated: Jul 15, 2025

10:19
Studying the Neural Basis of Adaptive Locomotor Behavior in Insects
Published on: April 13, 2011
12.9K
第一个恐怖鸟的脚印揭示了功能性的教学姿势
Ricardo N Melchor1,2, Silverio F Feola3,4, M Cristina Cardonatto5
1Instituto de Ciencias de la Tierra y Ambientales de La Pampa, Universidad Nacional de La Pampa and Consejo Nacional de Investigaciones Científicas y Técnicas, Santa Rosa, La Pampa, Argentina. rmelchor@exactas.unlpam.edu.ar.
Scientific reports
|September 30, 2023
概括
新的化石足迹显示,恐怖鸟 (Phorusrhacidae) 是快速跑步者,具有快速的适应能力. 这些南美掠食者使用他们的教学脚来有效地移动和捕捉猎物.
科学领域:
- 古生物学的古生物学
- 脊椎动物动物学 脊椎动物动物学
- 这种技术是什么?
背景情况:
- 恐怖鸟类 (Phorusrhacidae) 是南美洲占主导地位的掠食者.
- 以前对它们的陆地习惯的推断是基于前肢的缩小和高体重.
- 恐怖鸟脚形态的确切功能,特别是数字II,由于化石记录不完整,仍然存在争论.
研究的目的:
- 为了分析Phorusrhacidae的第一个保存良好的化石足迹,命名为Rionegrina pozosaladensis.
- 为了重建这些灭绝的捕食鸟的运动习惯和功能形态.
- 基于技术证据,了解恐怖鸟类的进化适应.
主要方法:
- 对新发现的,保存良好的化石足迹进行分析,这些足迹归因于Phorusrhacidae.
- 与其他化石足迹进行比较的 ichnological 分析,包括 deinonychosaurian 恐龙.
- 足部结构和推断运动的功能形态解释.
主要成果:
- 发现了Phorusrhacidae,Rionegrina pozosaladensis的第一个教学足迹.
- 证据表明,中型的,晚米奥森恐怖鸟 (约8万年前) 具有强烈的线索性适应.
- 脚印显示了一个缩小的数字II,一个升高的甲-囊,数字III上的主要支,数字IV作为一个外.
结论:
- 化石足迹为恐怖鸟的运动提供了前所未有的洞察力,揭示了课程适应.
- 数字II的升起的爪子很可能用于钉住猎物.
- 由于尺寸和 mesaxony,Phorusrhacid 足迹与 deinonychosaurian 足迹不同,突出了独特的进化路径.
相关概念视频
Actin Treadmilling
8.1K
Actin filaments undergo polymerization and depolymerization from either end. The polymerization and depolymerization rates depend on the cytosolic concentration of free G-actins. The polymerization rate is generally higher at the plus or barbed end, while the depolymerization rate is higher at the minus or pointed end. At a steady state, critical concentration describes the concentration of free G-actin monomers at which the polymerization rate at the plus end is equal to that of the...
8.1K
The Fossil Record
25.2K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
25.2K
Bone Markings
5.4K
Bones have various surface features that help form joints and attach to other soft tissues. Depending on the function, bone markings are categorized into articulating projections, processes for attachment, depressions, and openings.
Articulating Projections
Articulating projections are found where two bones meet to form a joint. These structures are usually found at the ends of bones. The largest articulation is a rounded projection called the head, supported by a narrow neck at the ends of...
Articulating Projections
Articulating projections are found where two bones meet to form a joint. These structures are usually found at the ends of bones. The largest articulation is a rounded projection called the head, supported by a narrow neck at the ends of...
5.4K
Convergent Evolution
27.8K
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.
27.8K
Muscles of the Leg that Move the Foot and Toes
1.6K
The human leg comprises an intricate system of muscles that facilitate the movement of feet and toes. Within this system, the muscles are categorized into the anterior, lateral, and posterior compartments, each with a unique set of muscles carrying out specific functions.
Anterior Compartment
The anterior compartment includes muscles that contribute to the dorsiflexion of the foot. This compartment houses the tibialis anterior, extensor hallucis longus, and extensor digitorum longus muscles....
Anterior Compartment
The anterior compartment includes muscles that contribute to the dorsiflexion of the foot. This compartment houses the tibialis anterior, extensor hallucis longus, and extensor digitorum longus muscles....
1.6K
Optimal Foraging
12.1K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
12.1K

