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Figure 2 | BMC Evolutionary Biology

Figure 2

From: A new vetulicolian from Australia and its bearing on the chordate affinities of an enigmatic Cambrian group

Figure 2

Details of axial rod (interpreted as notochord) of Nesonektris aldridgei . A, SAM P46336a, detail of four offset notochord fragments overlapping each other; B, Holotype SAM P45212 (see Figure 1B), detail of displaced notochord at posterior end of body; C, SAM P47166, detail of notochord with detached terminal block; D, SAM P45215, posterior end of specimen with notochord displaced in S4; E, SAM P43655a, detail of displaced notochord, with small offsets at regular intervals (white arrowheads) corresponding to discs and larger displacement into blocks of discs (yellow arrowheads); F, partially decayed hagfish notochord, showing displacement of discs, image courtesy of Robert Sansom; scale bars, 5 mm (A-E) and 2 mm (F).

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