Strumigenys edaragona

Known from various kinds of wet-forest habitats with specimens obtained from litter-sample collections. Heterick & Kitching (2022) collected this species in a pitfall trap within a lowland dipterocarp forest in Brunei.

Identification
Bolton (2000) - A member of the rofocala complex in the Strumigenys godeffroyi-group. The strongly constricted base to the apical antennal segment, coupled with the smooth pleurae and side of propodeum, separate this species from Strumigenys baal. Both these characters are shared with Strumigenys rofocala which is, however, a smaller species (compare measurements) in which the apicoscrobal hair is not strongly differentiated from those that follow it on the dorsolateral margin of the occipital lobe.

Distribution based on Regional Taxon Lists
Indo-Australian Region: Borneo, Brunei Darussalam, Indonesia, Malaysia.

Nomenclature

 *  edaragona. Strumigenys edaragona Bolton, 2000: 816 (w.) INDONESIA (Sumatra).

Worker
Holotype. TL 2.2, HL 0.59, HW 0.41, CI 69, ML 0.26, MI 44, SL 0.34, SI 83, PW 0.26, AL 0.59. Characters of rojocala -complex. Base of sixth antennomere very narrow, strongly constricted to its articulation with the preapical segment. Apicoscrobal hair long and simple; 2-3 similar but much shorter hairs project from margin posterior to this. Cephalic dorsum with a transverse row of 4-6 stiffly erect simple hairs at the occipital margin; anterior to this the head with short ground-pilosity that is straight, elevated and inclined anteriorly, but without erect hairs similar to those at the occipital margin. Pronotal humeral hair long flagellate. Dorsum of pronotum and mesonotum each with a single pair of erect hairs. Dorsum of alitrunk densely reticulate-punctate except for pronotal dorsum where a few weak longitudinal rugulae are present and the reticulate-punctate component is somewhat effaced. Pleurae and side of propodeum smooth. Dorsum of petiole node reticulate-punctate; disc of postpetiole smooth. Lateral spongiform lobe of petiole moderately large, in profile the lobe extends forward to just beyond midlength of node but does not attain the anterior face of the node; in same view height of anterior face of node less than length of dorsum. Basigastral costulae strongly developed, about equal in length to disc of postpetiole. First gastral tergite with simple or flagellate standing hairs.

Paratype. TL 2.2, HL 0.60, HW 0.41, CI 68, ML 0.27, MI 45, SL 0.36, SI 88, PW 0.25, AL 0.59.

Type Material
Holotype worker, Malaysia: Sabah, Crocker Ra., 19.v.1987, 1200 m., no. 31a (Burckhardt & Lobl).

Paratypes. 1 worker, Malaysia: Sabah, G. Silam, 1981 (R. Leakey); 2 workers, Sabah, Poring Hot Springs, 9.v.1987, 600 m., no. 18 (Burckhardt & Lobl) (, MHNG).

References based on Global Ant Biodiversity Informatics

 * 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