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Figure 1 | BMC Evolutionary Biology

Figure 1

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

Figure 1

Chela terminology. A, “Normal” chela represented by a chelicera; B, Multi-chela: the second element is functionally a movable finger for the next proximal element and at the same time a fixed finger for the distal element, as in the megacheiran Haikoucaris ercaiensis Chen, Waloszek and Maas, 2004 [14]; C, Chela with a functional movable finger consisting of more than one element, as in the heteropteran Tydides rufus (Serville, 1831) [38]; D, Multi-chela with a distal chela with a functional movable finger consisting of two elements, as in the great appendage of Leanchoilia superlata Walcott, 1912.

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