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Figure 13 | BMC Evolutionary Biology

Figure 13

From: Morphology and function in the Cambrian Burgess Shale megacheiran arthropod Leanchoilia superlata and the application of a descriptive matrix

Figure 13

Leanchoilia superlata Walcott, 1912, functional morphology of the biramous appendages. A- B, Joint systems; A, Red line indicates joint of proximal part of exopod (pex) + distal part of exopod (dex) vs basipod (bas) + endopod element 1 (en1); B, Red line marks joint of proximal part of exopod + basipod vs distal part of exopod + endopod element 1; C- D, Recovery stroke, exopod moving posteriorly as joint pex + dex vs bas + en1 is bent; C, Anterior view; D, Median view, basipod and endopod element 1 in line (arrow); E- F, Power stroke, exopod movement enabled as joint pex + bas vs dex + en1 is bent; E, Anterior view; F, Median view, basipod bent against endopod element 1 (arrow).

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BMC Ecology and Evolution

ISSN: 2730-7182

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