Strumigenys stemonixys

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Strumigenys stemonixys
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. stemonixys
Binomial name
Strumigenys stemonixys
Brown, 1971

Strumigenys stemonixys casent0178461 profile 1.jpg

Strumigenys stemonixys casent0178461 dorsal 1.jpg

Specimen labels

Known from litter collections and rotten wood on the ground. Occurs in a range of wet forest types.


Bolton (2000) - A member of the Strumigenys szalayi-group. Resembling a larger, more attenuated version of Strumigenys szalayi, but with the differences noted below and in the key. Most specimens have no differentiated anterior face to the node but a poorly defined oblique face is developed in the specimens from near Vanimo (2 workers). These workers have the flagellate gastral pilosity of stemonixys and are retained as that species for the present.

Keys including this Species


Distribution based on Regional Taxon Lists

Indo-Australian Region: Indonesia, New Guinea, Palau (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • stemonixys. Strumigenys stemonixys Brown, 1971c: 81, figs. 2, 4 (w.) PALAU IS. See also: Bolton, 2000: 906.

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



Bolton (2000) - TL 3.9, HL 1.14, HW 0.75, CI 66, ML 0.62, MI 54, SL 0.80, SI 107, PW 0.38, AL 1.00. With head in profile the postocular concavity in the vetrolateral margin broad and conspicuous; in same view dorsal outline of head broadly concave from highest point of vertex to near occipital margin. Propodeum with a pair of long slender elevated spines, their length easily twice the distance separating their bases. Side of alitrunk reticulate-punctate, with a small un sculptured patch on katepisternum. Hairs on first gastral tergite sparse, those near apical margin long and flagellate, those near base may be flagellate but often are not; hairs on second tergite flagellate. These flagellate hairs contrast with the hairs on the postpetiole which are simple, stiff and relatively short. Petiole long and slender, node in profile usually without a differentiated anterior face; dorsal outline of the peduncle and node forming a single broad shallow curve (see notes below). Colour dull yellow to light brownish yellow, gaster glossy dark brown.

Type Material

Holotype worker, (B. P. Bishop Museum) a unique taken by means of Berlese funnel at 65 m altitude, E. Ngatpang. Babelthuap Island, Palau Group, western Carolines, 8 July, 1952, J. L. Gressitt.

Bolton (2000) - Holotype worker, PALAUIS: Babelthuap I., E Ngatpang, 56 m., 8.vii.1952 (J. L. Gressitt) (Bernice P. Bishop Museum) [not seen].