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Kinematics of whip spider pedipalps: a 3D comparative morpho-functional approach

Integrative Zoology 2022年第1期17卷 156-167页

作者： Michel SCHMIDT Roland R.MELZER Russell D.C.BICKNELL Bavarian State Collection of Zoology Bavarian Natural History CollectionsMunichGermany Department Biology II Ludwig-Maximilians-Universität MünchenMunichGermany GeoBio-Center Ludwig-Maximilians-Universität MünchenMunichGermany Palaeoscience Research Centre School of Environmental and Rural ScienceUniversity of New EnglandArmidaleAustralia

Amblypygi are tropical and subtropical ambush predators that use elongated,raptorial pedipalps for different *** pedipalp use in predation and courtship has been explored in videography in vivo analyses,kinematic ex vivo examination of these appendages has not been ***,we rectify this lack of data by using microCT scans to 3D-kinematically model the appendage morphology and the range of motion(ROM)of the joints for Damon medius and Heterophrynus *** illustrate the successful application of this technique to terrestrial euarthropods in determining the maximum ROM values for each pedipalp *** also note that,in life,these values would be lower due to motion restricting structures like tendons,arthrodial membranes,and *** further compare our maximum values obtained here with data from video-based motion *** ROM of each joint shows the greatest flexibility in the femur-tibia joint(140–150°),the lowest in the basitarsus-claw joint(35–40°).ROM in the tibia-basitarsus joint is markedly distinct(***:44°;***:105°).This disparity reflects how *** uses the joint in the capture basket,while *** uses the femur-tibia joint to form the capture *** further illustrate notable vertical motion of the *** pedipalp compared to *** difference reflects the retro-ventral trochanter apophysis of *** study opens the possibility to further whip spider kinematic *** of other taxa using this approach will result in a more comprehensive understanding of the ecological significance and ethological implications of this unique arachnid group.

关键词： 3D kinematic analyses Amblypygi arthropod joints Autodesk Maya Damon medius Heterophrynus elaphus range of motion analyses

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