Leptogenys kanaoi, Arimoto, Koichi, 2017

Arimoto, Koichi, 2017, Taxonomy of the Leptogenysmodiglianii species group from southeast Asia (Hymenoptera, Formicidae, Ponerinae), ZooKeys 651, pp. 79-106 : 95-99

Leptogenys kanaoi sp. n. Figures 3, 11, 12, 17B, 19B

Etymology.

Dedicated to Dr. Taisuke Kanao, collector of the material examined.

Type material.

Holotype. Worker (AK92), from rotted wood, mixed dipterocarp forest, Lambir Hills National Park, Miri, Sarawak, East Malaysia (Borneo), Malaysia, 4.20°N, 114.04°E, 90m, 4 X 2012, Taisuke Kanao leg. [FDS]. Paratypes (12 workers, 8 queens). 8 workers, 4 queens, same colony as the holotype [4 workers, 2 queens: FDS; 4 workers, 2 queens: ELKU]; 1 worker, Tower Region, same park, 16 VIII 1995, Seiki Yamane leg. [SKYC]; 3 workers, 4 queens (Eg98-BOR-868), Seipilok Forest, Sabah, East Malaysia (Borneo), Malaysia, 4 VII 1998, Katsuyuki Eguchi leg. [SKYC].

Type locality.

Lambir Hills National Park, Miri, Sarawak, East Malaysia (Borneo), Malaysia.

Distribution.

Malaysia: Borneo (Sarawak and Sabah).

Worker. Diagnosis.

In full-face view, head distinctly longer than wide (CI: 78-83). Mandible strongly curved throughout. Clypeus without lateral lobe; apex of median extension strongly projecting. Petiole in profile higher than long (LPI: 112-122), highest just anterior to posterodorsal angle; anterior face of node ventrally vertical and dorsally forming continuous curve with dorsum; dorsal face sloping anteriad. Gastral segment II smooth.

Measurements

(n = 5, holotype in parentheses). HL: 1.66-1.78 (1.77), HLL: 1.18-1.29 (1.24), HLA: 0.16-0.19 (0.19), HW: 1.34-1.43 (1.43), CML: 0.30-0.34 (0.34), CI: 78-83 (81), CLI: 17-19 (19), SL: 1.50-1.63 (1.56), SI: 109-116 (109), EL: 0.34-0.39 (0.36), OI: 27-30 (29), PrL: 1.04-1.09 (1.09), PrH: 0.69-0.74 (0.69), PrW: 1.03-1.07 (1.07), WL: 2.57-2.69 (2.69), PeL: 0.83-0.91 (0.91), PeH: 0.96-1.06 (1.02), PeW: 0.70-0.75 (0.75), LPI: 112-122 (112), DPI: 78-87 (82).

Description.

In full face view, head distinctly longer than wide. Mandible strongly curved throughout, with subapical tooth near apical tooth. Eye prominent, measuring one-fourth to one-third of head lateral margin length. Antennal scape distinctly longer than width of head, surpassing posterior margin of head by one-fifth of its length; antennomere III ca. 2.2 times as long as wide. Clypeus without lateral lobe; median extension moderately long, with apex strongly projecting. In dorsal view, pronotum longer than wide. Metanotal groove distinctly impressed. In profile, propodeal dorsum broadly convex. Petiole in profile higher than long, highest near mid-length, with roughly fan-shaped node; anterior face of node ventrally vertical and dorsally forming continuous curve with dorsum; dorsal face sloping anteriad; posterior face almost straight.

Head weakly areolate-rugose, longitudinally striate anteriorly; vertex weakly and transversally striate. Mandible weakly and longitudinally striate. Prosternum weakly rugose. Gastral segment I with scalloped depressions that are irregular in size and close to each other; segments II smooth.

Body black, gaster slightly tinged with red; clypeus, mandible, antenna, legs and ventral half of petiole dark-red. Apical two or three segments of gaster red-brown. Scalloped depressions on gastral segment I bearing hairs.

Queen. Measurements

(n = 5). HL: 1.59-1.74, HLL: 1.13-1.26, HLA: 0.16-0.18, HW: 1.30-1.39, CML: 0.26-0.33, CI: 80-82, CLI: 15-19, SL: 1.39-1.52, SI: 107-110, EL: 0.33-0.40, OI: 29-32, PrL: 0.96-1.03, PrH: 0.65-0.71, PrW: 1.00-1.06, WL: 2.39-2.56, PeL: 0.82-0.86, PeH: 1.03-1.09, PeW: 0.72-0.78, LPI: 123-126, DPI: 88-94. Petiole in profile distinctly higher than long, in dorsal view longer than wide.

Male.

Unknown.

Remarks.

The colony (AK92), including the holotype, was collected from rotted wood. It was composed of four queens, nine workers, and two pupae.