Table 1.
Data summary for all reported micro-CT scanned specimens.
Fig 1.
Shaded surface display volume rendering of Pheidole cervicornis-group minor workers.
(A) P. barumtaun Donisthorpe, LACMENT316356; (B) P. cervicornis Emery, CASENT0716375; (C) P. drogon sp. nov., paratype, CASENT0753009; (D) P. viserion sp. nov., paratype, CASENT0282331.
Fig 2.
Volumetric surface model illustrating the hypostomal bridge of Pheidole major workers.
(A) P. barumtaun Donisthorpe, CASENT0741213; (B) P. drogon sp. nov., holotype, CASENT0716380; (D) P. viserion sp. nov., holotype, CASENT0219462.
Fig 3.
False-color volume rendering of virtually dissected mesosoma (Pheidole drogon, major worker, holotype, CASENT0716380).
Muscle fibers are colored in red. Note the scarcity of muscle fibers in either the propodeal spines (ppd) relative to the propodeal spines (prn). (A) Dorsal view, (B) profile view, (C) anterodorsal view, (D) anterodorsal oblique view.
Fig 4.
False-color volume rendering of virtually dissected mesosoma (Pheidole drogon, minor worker, paratype, CASENT0753009).
Muscle fibers are colored in red. Note the relative scarcity of muscle fibers in either the pronotal (prn) or propodeal spines (ppd). (A) Dorsal view, (B) profile view, (C) anterodorsal view, (D) anterodorsal oblique view.
Fig 5.
Map of New Guinea showing known occurrences of species within the Pheidole cervicornis group.
Arrow symbols point to type localities.
Fig 6.
Illustration of Pheidole cervicornis group characteristics, head of major worker.
Head Width > 1.8 mm; (a) antenna 12-segmented; (b) antennal scrobes absent. Hypostomal bridge with: (c) a single stout to moderate median tooth flanked by (d) a pair of weaker submedian teeth and (e) a pair of stout outer teeth.
Fig 7.
Illustration of Pheidole cervicornis group characteristics, profile of major worker.
(a) head vertex strongly convex in profile; (b) pronotal very spines long; (c) propodeal spines very long (d) mesonotum modified with spines or lamellate lobes (e) transition from mesonotum to propodeum abrupt.
Table 2.
Output files for x-ray micro-ct scans of the P. cervicornis group specimens.
Fig 8.
Illustration of Pheidole cervicornis group characteristics, head of minor worker.
Head Width > 0.55 mm (a) antenna 12-segmented; (b) antennal scapes extend distinctly beyond posterior head margin.
Fig 9.
Illustration of Pheidole cervicornis group characteristics, profile of minor worker.
(a) long pronotal spines present (simple or bifurcate); (b) mesonotum spinose (c) posterior face concave (d) propodeal spines extremely long and bifurcated.
Fig 10.
Taxonomic characters used for species diagnosis in the Pheidole cervicornis group.
Fig 11.
Pheidole barumtaun Donisthorpe.
Major worker, CASENT0741213: (A) full-face view (B) lateral view (C) dorsal view. Minor worker, LACMENT316356: (D) full-face view (E) profile view (F) dorsal view. From Antweb.org, photographs by April Nobile.
Fig 12.
Minor worker, CASENT0716375: (A) full-face view (B) profile view (C) dorsal view. From Antweb.org, photographs by Masako Ogasawara.
Fig 13.
Major worker, holotype, CASENT0716380: (A) full-face view (B) lateral view (C) dorsal view. Minor worker, paratype, CASENT0753009: (D) full-face view (E) profile view (F) dorsal view. Photographs by Masako Ogasawara.
Fig 14.
Major worker, holotype, CASENT0219462: (A) full-face view (B) lateral view (C) dorsal view. Minor worker, paratype, CASENT0282331: (D) full-face view (E) profile view (F) dorsal view. Photographs by Masako Ogasawara.