Stictoponera ortostoma

AntWiki: The Ants --- Online
Stictoponera ortostoma
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Stictoponera
Species: S. ortostoma
Binomial name
Stictoponera ortostoma
(Lattke, 2004)

Gnamptogenys ortostoma casent0281844 p 1 high.jpg

Gnamptogenys ortostoma casent0281844 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of this species.


Lattke (2004) - The elongate habitus of this species, especially the rectangular head shape, is reminiscent of similar morphologies seen in the laevior group. The presence of propodeal teeth in S. ortostoma precludes its inclusion in the laevior group, which lacks propodeal armature.


Latitudinal Distribution Pattern

Latitudinal Range: 4.95° to 1.383329988°.

Tropical South

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo, Indonesia, Malaysia, Singapore (type locality).
Oriental Region: Thailand.

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.



Males are unknown.


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

  • ortostoma. Gnamptogenys ortostoma Lattke, 2004: 139, fig. 31 (w.q.) SINGAPORE, BORNEO (East Malaysia: Sarawak), THAILAND.
    • Type-material: holotype worker, 1 paratype queen.
    • Type-locality: holotype Singapore: Bukit Timah, 17.iii.1967 (D.H. Murphy); paratype with same data.
    • Type-depository: ANIC.
    • Combination in Stictoponera: Camacho, Franco, Branstetter, et al. 2022: 12.
    • Status as species: Pfeiffer, et al. 2011: 35; Khachonpisitsak, et al. 2020: 38; Camacho, Franco, Branstetter, et al. 2022: 12.
    • Distribution: Malaysia (Sarawak), Singapore, Thailand.

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

Head subrectangular in frontal view, with anterior margin of clypeal lamella relatively straight to slightly concave, laterally angular; mandibular dorsum mostly smooth with piligerous punctae. Lateral pronotal face densely foveolate, anteroventral corner forming acute angle; humeral angle lamellate.

Type Material



Lattke 2004 Gnamptogenys fig 31-33

Metrics. [Holotype] Paratype (n = 1): HL [0.94] 0.98, HW [0.70] 0.74, ML [0.42] 0.38, SL [0.76] 0.83, ED [0.18] 0.20, WL [1.24] 1.23 mm. CI [0.78] 0.76, SI [1.09] 0.97, MI [0.60] 0.51, OI [0.26] 0.24. Head subrectangular in frontal view, lateral margins straight to broadly convex, posterior margin broadly concave, anterior margin of clypeal lamella straight to slightly concave, laterally angular; frons densely punctate, almost areolate, ridges between depressions rounded, not sharp; fine median longitudinal sulcus extends from posterior clypeal margin to eye height; clypeus smooth with round punctures, lamella rugulose-scrobiculate; scape mostly smooth with scattered punctulae; mandibular dorsum mostly smooth with piligerous punctae, punctae deeper and more elongate basally; occipital lobe well developed, lamella narrow, angular at ends.

Lateral pronotal face densely foveolate, anteroventral corner forming acute angle; humeral angle well developed, lamellate; anepisterum mostly smooth with scattered punctae; metapleuron mostly smooth; mesosomal dorsum densely foveolate, promesonotal suture impressed as brief transverse line, laterally obliterated; propodeal declivity mostly smooth, bordered by carina contiguous with propodeal denticles. Petiolar node evenly convex in lateral view, ventral process forming anteriorly projecting lobe, dorsum smooth with foveolae; postpetiolar dorsum mostly smooth with scattered punctae, punctae deeper and more abundant anterad than posterad, laterally with deeper and more punctae than dorsally; sternum mostly smooth with scattered punctae; dorsum of abdominal segment 4 mostly smooth with scattered punctulae. Fore coxa smooth in lateral view; fore tarsus opposite strigil with single stout seta; metacoxal tooth slender, triangular, relatively straight. Dorsum of thorax and abdominal segments 1-4 with scattered erect to subdecumbent hairs. Head, mesosoma, petiole, and gaster dark brown to black; mandibles, antennae, legs ferruginous.


Metrics (n = 1): HL 0.94, HW 0.73, ML 0.44, SL 0.74, ED 0.23, WL 1.34 mm. CI 0.78, SI 1.01, MI 0.60, OI 0.21. Pronotum areolate, with almost denticle-like anteroventral corner in lateral view; mesonotum mostly longitudinally rugulosepunctate; mesopleuron mostly smooth with scattered foveolae; dorsal propodeal face areolate. Metacoxal tooth stout, arched.

Type Material

Holotype worker. Singapore, Bukit Timah, 17-iii-1967, D.H. Murphy. Deposited in Australian National Insect Collection. Paratype. One queen on same pin as holotype in ANIC.


The species name is derived form a conjugation of the Greek words for “straight,” orthos, and “mouth,” stoma (n.).


References based on Global Ant Biodiversity Informatics

  • Lattke J. E. 2004. A taxonomic revision and phylogenetic analysis of the ant genus Gnamptogenys Roger in Southeast Asia and Australasia (Hymenoptera: Formicidae: Ponerinae). University of California Publications in Entomology 122: 1-266.
  • Pfeiffer M., and D. Mezger. 2012. Biodiversity Assessment in Incomplete Inventories: Leaf Litter Ant Communities in Several Types of Bornean Rain Forest. PLoS ONE 7(7): e40729. doi:10.1371/journal.pone.0040865
  • Pfeiffer M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58