Leptogenys modiglianii Emery, 1900

Arimoto, Koichi, 2017, Taxonomy of the Leptogenysmodiglianii species group from southeast Asia (Hymenoptera, Formicidae, Ponerinae), ZooKeys 651, pp. 79-106 : 100-102

Leptogenys modiglianii Emery, 1900 Figures 3, 14, 15C, 18C

Leptogenys modiglianii Emery, 1900: 13 (original description of workers; type locality: Malaconni, Engano Is., Indonesia); Bolton 1995: 232 (catalogue).

Leptogenys (Leptogenys) modiglianii Emery, 1900: Emery 1911: 100 (catalogue); Mann 1919: 298 (in key); Chapman and Capco 1951: 31 (checklist).

Type material.

Lectotype (present designation). Worker, Malaconni, Enggano Island, off the west coast of Sumatra, Indonesia, VI 1891, Elio Modigliani leg., specimen code: ANTWEB CASENT 0903974 [MSNG]. Paralectotypes. 4 workers, same data as the holotype [3 workers: MSNG; 1 worker: NHMW].

Distribution.

Indonesia: Enggano Island.

Worker. Diagnosis.

In full-face view, head distinctly longer than wide (CI: 88-90). Mandible curved near base, becoming straight apically. Antennal scape slightly longer than width of head (SI: 103-105), surpassing posterior margin of head by one-fifth to one-fourth of its length. Clypeus with lateral lobe, smoothly incurved between lateral lobe and median extension; median extension with convex apex. In profile, petiole slightly higher than long (LPI: 103-108), highest just anterior to posterodorsal angle; anterior and dorsal faces forming continuous curve; dorsal face distinctly sloping anteriad.

Measurements

(n = 5, lectotype in parentheses). HL: 1.52-1.68 (1.68), HLL: 1.11-1.22 (1.22), HLA: 0.18-0.20 (0.18), HW: 1.34-1.50 (1.50), CML: 0.25-0.28 (0.28), CI: 88-90 (90), CLI: 15-17 (17), SL: 1.40-1.58 (1.58), SI: 103-105 (105), EL: 0.30-0.34 (0.34), OI: 26-28 (28), PrL: 0.99-1.09 (1.09), PrH: 0.59-0.75 (0.75), PrW: 0.95-1.02 (1.02), WL: 2.49-2.68 (2.68), PeL: 0.85-0.92 (0.92), PeH: 0.91-0.98 (0.98), PeW: 0.64-0.67 (0.67), LPI: 103-108 (106), DPI: 73-76 (73).

Redescription.

In full-face view, head distinctly longer than wide. Mandible curved near base, becoming straight apically; subapical tooth absent. Eye prominent, measuring one-fourth to one-third of head lateral margin length. Antennal scape slightly longer than width of head, surpassing posterior margin of head by one-fifth to one-fourth of its length; antennomere III ca. 2.3 times as long as wide. Clypeus with lateral lobe, smoothly incurved between lateral lobe and median extension; median extension moderately long, with convex apex. In dorsal view, pronotum longer than wide. Metanotal groove weakly impressed. In profile, propodeal dorsum almost straight. Petiole in profile slightly higher than long, highest just anterior to posterodorsal angle, with fan-shaped node; anterior and dorsal faces forming continuous curve; dorsal face distinctly sloping anteriad; posterior face almost straight but slightly convex.

Head weakly areolate-rugose, longitudinally striate anteriorly; vertex weakly and transversally striate. Mandible smooth. Gastral segment I with scalloped depressions that are irregular in size; distance between depressions distinctly greater than diameter of depressions; interspace between depressions with small punctures; segment II smooth.

Body black, slightly tinged with red; clypeus, mandible, antenna, legs and lower half of petiole dark-red. Apical two or three segments of gaster red-brown. Scalloped depressions on gastral segment I bearing hairs, small punctures without hairs.

Queen and male.

Unknown.