Journal of Paleontology 92(5):872–882 IVBr2 IVBr1 1 IIIBr2ax
IIBr2ax IIIBr1
IIBr1 +6 +12
IBr2ax IBr1
2 +18
4
3 1 2 3 4
1 cm
Figure 4. Schematic line drawing of centrodorsal and arms in aboral view (top) with four corresponding photographic views of Rautangaroa aotearoa n. gen. n. comb. from the Otekaike Limestone, Oligocene, ‘Waipati,’ North Otago, New Zealand, (OU46680). The schematic drawing (not to scale) illustrates the preserved and missing brachials, the arm-branching pattern, and type of brachial articulations observed on the intact specimen. The circled numbers, 1–4, on the schematic drawing correspond to numbers associated with the photographic views. Missing brachials colored grey. Brachial articulations coded in schematic drawing as follows: solid line=muscular; wavy line=synarthrial; dashed line=syzygial; dotted lines represent inferred brachial articulation. Brachials identified with symbols as in text following Hess and Messing (2011): IBr1=first primibrachial; IBr2ax=second primibrachial, axillary; IIBr1=first secundibrachial, etc. Number of articulated distal tetribrachials indicated by + symbol. Scale as indicated. (1) IIIBr2ax with arrow pointing at the muscular articular facet. (2) Regenerating arm consisting of four tetribrachs, with arrow pointing at syzygy at IIIBr1-2. (3) Synarthrial articulation (arrow), distal facet of IIIBr1. (4) Adoral, slightly oblique radial view of centrodorsal showing IBr1 and IBr2ax.
