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|a 10.1016/j.asd.2022.101165
|2 doi
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|a /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001830.pica
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|a (ELSEVIER)S1467-8039(22)00026-3
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|a Michalski, Hanna
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Evolutionary morphology of coxal musculature in Pseudoscorpiones (Arachnida)
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| 264 |
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|c 2022transfer abstract
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|a nicht spezifiziert
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|a Pseudoscorpions are an ancient and globally distributed lineage of arachnids with more than 4000 species. Despite being present in virtually all terrestrial habitats, their morphology and anatomy has rarely been studied to date, which hampers homology statements both within and between other arachnid orders. All pseudoscorpions share a morphological peculiarity, the fixation of the coxae of all the walking legs. The same morphological condition is seen in certain other arachnid taxa, such as Solifugae or Scorpiones – potential sistergroups of Pseudoscorpiones. To investigate the musculature apparatus of this unusual feature, we reconstructed the musculature in the coxae of walking legs in three species of pseudoscorpions that represent the three major clades within this order. Using micro-computed tomography (μCT), we show that pseudoscorpions have the highest number of coxal muscles amongst the arachnid orders (12 vs. fewer than 10 in others), and that the muscular composition of the first two legs differs from that in the hind legs, correlating with the difference in function, i.e. pulling in the front legs and pushing in the hind legs. Pseudoscorpions are also unique amongst the arachnids in lacking endoskeletal structures (coxal apodeme or costa coxalis) inside the coxae. We observed that within pseudoscorpions, there is a trend towards a reduction of the number of coxal muscles, with the most basal-branching taxon having the highest number and more derived taxa exhibiting lower counts. We hypothesize the muscular ground pattern for Pseudoscorpiones and discuss the evolution of this system by comparing it to the (scanty) data on other arachnids available in the literature.
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|a Pseudoscorpions are an ancient and globally distributed lineage of arachnids with more than 4000 species. Despite being present in virtually all terrestrial habitats, their morphology and anatomy has rarely been studied to date, which hampers homology statements both within and between other arachnid orders. All pseudoscorpions share a morphological peculiarity, the fixation of the coxae of all the walking legs. The same morphological condition is seen in certain other arachnid taxa, such as Solifugae or Scorpiones – potential sistergroups of Pseudoscorpiones. To investigate the musculature apparatus of this unusual feature, we reconstructed the musculature in the coxae of walking legs in three species of pseudoscorpions that represent the three major clades within this order. Using micro-computed tomography (μCT), we show that pseudoscorpions have the highest number of coxal muscles amongst the arachnid orders (12 vs. fewer than 10 in others), and that the muscular composition of the first two legs differs from that in the hind legs, correlating with the difference in function, i.e. pulling in the front legs and pushing in the hind legs. Pseudoscorpions are also unique amongst the arachnids in lacking endoskeletal structures (coxal apodeme or costa coxalis) inside the coxae. We observed that within pseudoscorpions, there is a trend towards a reduction of the number of coxal muscles, with the most basal-branching taxon having the highest number and more derived taxa exhibiting lower counts. We hypothesize the muscular ground pattern for Pseudoscorpiones and discuss the evolution of this system by comparing it to the (scanty) data on other arachnids available in the literature.
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| 650 |
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7 |
|a MicroCT
|2 Elsevier
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| 650 |
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7 |
|a Locomotory apparatus
|2 Elsevier
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| 650 |
|
7 |
|a Chelicerata
|2 Elsevier
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| 700 |
1 |
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|a Harms, Danilo
|4 oth
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| 700 |
1 |
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|a Runge, Jens
|4 oth
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| 700 |
1 |
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|a Wirkner, Christian S.
|4 oth
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| 773 |
0 |
8 |
|i Enthalten in
|n Elsevier Science
|t Ventricular Restraint Improves Outcomes in HF Patients with CRT
|d 2011
|g Amsterdam [u.a.]
|w (DE-627)ELV015921530
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| 773 |
1 |
8 |
|g volume:69
|g year:2022
|g pages:0
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| 856 |
4 |
0 |
|u https://doi.org/10.1016/j.asd.2022.101165
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