File:Degrees of sclerotization in lobopodous and stenopodous limbs of fossil lobopodians and arthropods.png
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English: Fig 4. Degrees of sclerotization in lobopodous and stenopodous limbs of fossil lobopodians and arthropods.
A. Surusicaris elegans gen. et sp. nov., holotype (ROM 62976), showing the three right anterior uniramous limbs with faint traces of cuticular boundaries. B. Limbs of Diania cactiformis Liu et al., counterpart of YKLP 11319 (from [79]). Note the thickness and regularity of the subdivisions. C. Aysheaia pedunculata Walcott, part of holotype (USNM 57655), posterior limbs preserved at various angles. The aspect of the annulations varies from discordant through faint to regular. D. Hadranax augustus Budd and Peel [126], trunk lobopods of the mid-section of holotype (MGUH 24.527). E. Posterior endopod of the bivalved arthropod Odaraia alata Walcott. Poor sclerotization can lead to a deformed preservation of segments’ shape, but the rectangular aspect of some segments and the general elongated habitus usually remain characteristic of arthrodization. F. Anterior limb of Canadaspis perfecta preserved twisted and dislocated. In certain cases, taphonomy can reshape an arthrodized limb to a much more compact structure, although the undulation or folding of segments’ boundaries are not necessarily associated with such deformations. G. The “poorly sclerotized” anterior endopods of the fuxianhuiid Chengjiangocaris kunmingensis Yang et al. [14] (YKLP 12024). Note their relatively advanced arthrodization in comparison to Surusicaris. Abbr. alx: anterior limb (1–3). Scale numbers in mm. https://doi.org/10.1371/journal.pone.0124979.g004 |
| Date | |
| Source | Aria C, Caron J-B (2015) Cephalic and Limb Anatomy of a New Isoxyid from the Burgess Shale and the Role of “Stem Bivalved Arthropods” in the Disparity of the Frontalmost Appendage. PLoS ONE 10(6): e0124979. https://doi.org/10.1371/journal.pone.0124979 |
| Author | Cédric Aria, Jean-Bernard Caron |
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