Fig. 4 | Communications Biology

Fig. 4

From: Variation in appendages in early Cambrian bradoriids reveals a wide range of body plans in stem-euarthropods

Fig. 4

Revised affinity of the three Bradoriida taxa (Indiana sp., Kunmingella douvillei and Kunyangella cheni) as sister taxon to the euarthropod crown-group. Strict consensus of the most parsimonious trees resulting from an implied weighting (k = 3) parsimony analysis following refs. 8,9. Former interpretations of Bradoriida7,8 are included. Bradoriida monophyly is supported by the presence of a free head shield and rows of elongate spines on the inner margin of the frontal appendage (characters 22 and 145, respectively, both homoplastic). Bradoriida are united with the crown-group euarthropods on the basis of their unspecialised or antennate third head segment, contrasting with other stem-euarthropods, which are interpreted as having megacheiran-style appendages (character 188). They are not placed within the euarthropod crown-group because they have eight or more podomeres in their locomotory limbs (contrasting with five or six+terminal claw in most crown-euarthropods; character 280)

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