Proboscitermes mcgrewi Scheffrahn, sp. nov.

• Main Authors: Scheffrahn, Rudolf H., O'Malley, Robert C.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Isoptera; Termitidae; Proboscitermes; Proboscitermes mcgrewi; Sperm whale
• Online Access: https://doi.org/10.5281/zenodo.6197526; http://treatment.plazi.org/id/03C787D39122097009FCF5333816F88D

Proboscitermes mcgrewi Scheffrahn sp. nov. (Figs. 2 –6) Description. Imago (Fig. 2 AB) . Winged imago unknown. Head and dorsum of physogastric queen brown; measurements (mm): entire body length 22.7, max dorsal body width 4.3, fourth anterior tergite 1.36 wide by 0.40 long, maximum head width 1.56, eye maximum diameter 0.23, pronotum 0.94 wide by 0.54 long. Soldier (Figs. 3 A–E, 4) . Monomorphic. Body whitish; digestive tube whitish and highly reduced; tube devoid of granualar contents. Body dimensions proportionally small in comparison to head; body smaller than that of worker. Head capsule light orange grading to ferruginous orange toward frontal lobe. Body coloration hyaline except for yellowish pronotum. Surface of head capsule and mandibles with fine shagreened texture. Head capsule pentagonal in dorsal and ventral views; quadrate frontal lobe in lateral view suggestive of a sperm whale head. Large fontanelle directed anteroventrally to saturate surrounding dense tuft of setae with clear defensive secretion; 6 long setae on anterodorsal hump of frontal lobe; a few more long setae near occiput. Labrum quadrate with triangular points at anterolateral corners; eclipsed from dorsal view by frontal lobe. Pronotum with about 10 long setae near posterior margin; 8–10 long setae scattered along each tergite and sternite; especially prominent a lateral margins. Mandibles taper evenly to tips, surface shagreened, tips incurved; very small triangular tooth at base of each mandible. Mandibles extend three-quarters their length beyond frontal lobe. Distinct ridge on gena behind antennal sockets; antennae with 14 articles, 2=3>4<5 or 2>3=4<5. In lateral view, postmentum with blunt peak near its posterior fourth. Measurements (n = 12; 2, 4, 1, and 5 from each paratype colony; mean±SD (range) in mm: max head length without mandibles 1.43±0.055 (1.33–1.51); maximum head width 1.07±0.017 (0.89–1.09); head height without postmentum 0.93±0.026 (0.86–0.96); mandible articulation to distal margin of frontal lobe ...