Leptogenys breviloba

AntWiki: The Ants --- Online
Leptogenys breviloba
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Leptogenys
Species group: modiglianii
Species: L. breviloba
Binomial name
Leptogenys breviloba
Arimoto, 2017

Arimoto, K 2017-7a.jpg

Arimoto, K 2017-7b.jpg

The only known colony of this species, which includes the holotype, was collected under the bark of rotting wood in secondary rainforest.


Arimoto (2017) - A member of the Leptogenys modiglianii species group. 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.

Keys including this Species


Malaysia: Peninsular Malaysia (Selangor).

Latitudinal Distribution Pattern

Latitudinal Range: 3.32° to 3.32°.

Tropical South

Distribution based on Regional Taxon Lists

Indo-Australian Region: Malaysia (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.

Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.


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


Male. Unknown.


The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • breviloba. Leptogenys breviloba Arimoto, 2017: 87, figs. 3, 4, 5, 15B, 15D, 16A (w.q.) MALAYSIA.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.



(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).

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 ventral-ly 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.


(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.

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. Kyushu University Collection. 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. Kagawa University Collection.


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