Strumigenys stemonixys

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 Specimen labels

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

Identification

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

• Key to Strumigenys of East Asia

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: 7.5203° to -8.766670227°.

North Temperate	North Subtropical	Tropical	South Subtropical	South Temperate

• Source: AntMaps

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

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.

Nomenclature

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

• 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.

Description

Worker

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].

References

• Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 906, redescription of worker)
• Brown, W. L., Jr. 1971c. The Indo-Australian species of the ant genus Strumigenys: group of szalayi (Hymenoptera: Formicidae). Pp. 73-86 in: Asahina, S., et al. (eds.) Entomological essays to commemorate the retirement of Professor K. Yasumatsu. Tokyo: Hokuryukan Publishing Co. (page 81, figs. 2, 4 worker described)

References based on Global Ant Biodiversity Informatics

• Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
• Brown W. L., Jr. 1971. The Indo-Australian species of the ant genus Strumigenys: group of szalayi (Hymenoptera: Formicidae). Pp. 73-86 in: Asahina, S., et al. (eds.) Entomological essays to commemorate the retirement of Professor K. Yasumatsu. Tokyo: Hokuryukan Publishing Co., vi + 389 pp.
• CSIRO Collection
• Field Museum Collection, Chicago, Illinois (C. Moreau)
• Janda M., G. D. Alpert, M. L. Borowiec, E. P. Economo, P. Klimes, E. Sarnat, and S. O. Shattuck. 2011. Cheklist of ants described and recorded from New Guinea and associated islands. Available on http://www.newguineants.org/. Accessed on 24th Feb. 2011.