Leptogenys breviloba, Arimoto, Koichi, 2017

Arimoto, Koichi, 2017, Taxonomy of the Leptogenysmodiglianii species group from southeast Asia (Hymenoptera, Formicidae, Ponerinae), ZooKeys 651, pp. 79-106 : 87

Leptogenys breviloba sp. n. Figures 3, 4, 5, 15B, 15D, 16A

Etymology.

A combination of the Latin brevis (short), and the Latin loba (lobed), referring to the short clypeal lobe.

Type material.

Holotype. Worker (AK18), under the bark of rotted wood, secondary rainforest, Ulu Gombak, Gombak, Selangor, Malaysia, 3.32°N, 101.75°E, 230-350 m, 23 V 2012, Taku Shimada leg. [ELKU]. Paratypes (6 workers, 2 queens). 2 workers, same colony as the holotype [ELKU]; 4 workers, 2 queens (FI99-402), same place as the holotype, 20 VIII 1999, Fuminori Itô leg. [BLKU].

Type locality.

Ulu Gombak, Gombak, Selangor, Malaysia.

Distribution.

Malaysia: Peninsular Malaysia (Selangor).

Worker. Diagnosis.

In full-face view, head distinctly longer than wide (CI: 82-84). Mandible broadly curved throughout. Clypeus with lateral lobe, smoothly incurved between lateral lobe and median extension; apex of median extension convex. In profile, petiole longer than or almost as long as high (LPI: 94-102), highest near middle, with subhorizontal dorsal face.

Measurements

(n = 5, holotype in parentheses). HL: 1.35-1.42 (1.39), HLL: 1.07-1.09 (1.09), HLA: 0.12-0.16 (0.16), HW: 1.11-1.20 (1.14), CML: 0.18-0.21 (0.21), CI: 82-84 (82), CLI: 12-15 (15), SL: 1.32-1.38 (1.38), SI: 112-121 (121), EL: 0.34-0.37 (0.36), OI: 32-34 (33), PrL: 0.84-0.95 (0.84), PrH: 0.59-0.67 (0.67), PrW: 0.87-0.97 (0.90), WL: 2.22-2.37 (2.27), PeL: 0.85-0.88 (0.85), PeH: 0.81-0.89 (0.81), PeW: 0.60-0.67 (0.62), LPI: 94-102 (94), DPI: 71-76 (72).

Description.

In full-face view, head distinctly longer than wide. Mandible broadly curved throughout, with subapical tooth near apical tooth. Eye strongly prominent, measuring one-third of head lateral margin length. Antennal scape distinctly longer than width of head, surpassing posterior margin of head by one-fourth of its length; antennomere III ca. 1.6 times as long as wide. Clypeus with lateral lobe, smoothly incurved between lateral lobe and median extension; median extension short, with convex apex. In dorsal view, pronotum shorter than or slightly longer than wide. Metanotal groove weakly impressed. In profile, propodeal dorsum almost straight. Petiole in profile longer than or almost as long as high, highest near middle, with subrectangular node; anterior face of node ventrally vertical and dorsally forming continuous curve with dorsum; dorsal face subhorizontal, but weakly sloping anteriad; posterior margin almost straight to slightly concave.

Head distinctly areolate-rugose. Mandible smooth. Gastral segment I with scalloped depressions, which are irregular in size but generally small; distance between small depressions greater than diameter of depressions; large depressions close to each other; segments II smooth.

Body black, 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 segments I bearing hairs.

Queen. Measurements

(n = 2). HL: 1.32-1.46, HLL: 1.05-1.12, HLA: 0.15-0.16, HW: 1.14-1.21, CML: 0.21, CI: 83-87, CLI: 14-16, SL: 1.25-1.36, SI: 110-112, EL: 0.35-0.39, OI: 33-35, PrL: 0.88-0.98, PrH: 0.66-0.76, PrW: 0.94-0.98, WL: 2.27-2.41, PeL: 0.83-0.88, PeH: 0.87-0.95, PeW: 0.68-0.70, LPI: 105-108, DPI: 79-82. Mandible shorter than that of worker. Petiole in profile shorter than high, in dorsal view distinctly longer than wide.

Male.

Unknown.

Remarks.

The colony (AK18), including the holotype, was collected under the bark of rotted wood.