Leptogenys malayana, Arimoto, Koichi, 2017

Arimoto, Koichi, 2017, Taxonomy of the Leptogenysmodiglianii species group from southeast Asia (Hymenoptera, Formicidae, Ponerinae), ZooKeys 651, pp. 79-106 : 99-100

Leptogenys malayana sp. n. Figures 3, 13, 18A

Etymology.

The species epithet, malayana , refers to the fact that this species was found on Peninsular Malaysia.

Type material.

Holotype. Worker, Trengganu, Malaysia, 1974, T. Clay leg. [BMNH]. Paratypes. 2 workers, same data as the holotype [BMNH].

Detailed collecting locality of the types is unknown. For convenience, the location of this species is marked at the center of Trengganu Province, Malaysia, on the distribution map (Fig. 3).

Type locality.

Trengganu, Malaysia.

Distribution.

Malaysia: Peninsular Malaysia (Trengganu).

Worker. Diagnosis.

In full-face view, head almost as long as wide (CI: 98-101). Mandible curved near base, becoming straight apically. Antennal scape distinctly longer than width of head (SI: 115-121), surpassing posterior margin of head by two-fifths of its length. Clypeus with lateral lobe, with blunt angle between lateral lobe and median extension; apex of median extension truncate. Petiole in profile distinctly higher than long (LPI: 112-116), highest just anterior to posterodorsal angle; anterior face of node ventrally vertical and dorsally forming continuous curve with dorsum; dorsal face distinctly inclined anteriad.

Measurements

(n = 3, holotype in parentheses). HL: 1.57-1.63 (1.63), HLL: 1.16-1.21 (1.18), HLA: 0.17-0.19 (0.17), HW: 1.59-1.61 (1.60), CML: 0.23-0.24 (0.23), CI: 98-101 (98), CLI: 14-15 (14), SL: 1.83-1.95 (1.91), SI: 115-121 (120), EL: 0.36-0.38 (0.37), OI: 31 (31), PrL: 1.01-1.09 (1.09), PrH: 0.74-0.89 (0.89), PrW: 1.12-1.14 (1.14), WL: 2.57-2.78 (2.78), PeL: 0.88-0.97 (0.97), PeH: 1.02-1.10 (1.09), PeW: 0.72-0.76 (0.76), LPI: 112-116 (112), DPI: 77-82 (78).

Description.

In full face view, head almost as long as wide. Mandible curved near base, becoming straight apically; subapical tooth distinct in holotype or absent in paratypes. Eye prominent, measuring one-third of head lateral margin length. Antennal scape distinctly longer than width of head, surpassing posterior margin of head by two-fifths of its length; antennomere III ca. 2.7 times as long as wide. Clypeus with lateral lobe, with blunt angle between lateral lobe and median extension; median extension short, with truncate apex. In dorsal view, pronotum shorter than wide. Metanotal groove slightly impressed. In profile, propodeal dorsum weakly convex to almost straight. Petiole in profile distinctly higher than long, highest just anterior to posterodorsal angle, with fan-shaped node; anterior face of node ventrally vertical and dorsally forming continuous curve with dorsum; dorsal face distinctly inclined anteriad; posterior face slightly concave dorsally and slightly convex ventrally.

Head strongly areolate-rugose, longitudinally striate near clypeus; vertex weakly and transversally striate. Mandible distinctly striate longitudinally. Gastral segment I with scalloped depression that are irregular in size but generally large; large depressions close to each other; distance between small depressions greater than diameter of depressions; 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 and male.

Unknown.