Strumigenys tisisyx

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Strumigenys tisisyx
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. tisisyx
Binomial name
Strumigenys tisisyx
Bolton, 2000

Strumigenys tisisyx casent0900897 p 1 high.jpg

Strumigenys tisisyx casent0900897 d 1 high.jpg

Specimen Labels

Known from a rainforest collection and a worker found in a Rhytidoponera cyrus (=Rhytidoponera chalybaea) colony in a disturbed wet scleroyphyll habitat.

Identification

Bolton (2000) - A member of the smythiesii complex in the Strumigenys godeffroyi-group. Closest related to Strumigenys friedae but tisisyx is more slender-headed, much more extensively sculptured on the side of the alitrunk and usually darker in colour. Its cephalic ground pilosity is more broadly spatulate and more conspicuous than that of friedae, and the occipital margin does not usually have simple standing hairs. See also notes under friedae.

Specimens from Narara Creek all lack the flagellate apicoscrobal hair, which is obvious in all other series. I suspect that this lack is the result of damage and mishandling as most of the Narara Creek specimens also have other specialised pilosity partially or wholly missing from the head and alitrunk.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: Australia (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

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

  • tisisyx. Strumigenys tisisyx Bolton, 2000: 970, figs. 526, 542 (w.q.) AUSTRALIA.

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

Description

Worker

Holotype. TL 2.8, HL 0.72, HW 0.45, CI 63, ML 0.31, MI 43, SL 0.45, SI 100, PW 0.31, AL 0.76. With characters of smythiesii-complex. Apicoscrobal hair flagellate, long and straggly. Cephalic dorsum sharply reticulate-punctate, with conspicuous broadly spatulate curved ground-pilosity, but without erect fine or simple hairs (in one or two non-paratypic specimens a single pair of erect short simple hairs occurs close to midline near occipital margin). Pronotal humeral hair flagellate, long and fine; pronotal dorsum without standing pilosity. Mesonotum with I pair of erect flagellate hairs. Entire dorsal alitrunk densely and sharply reticulate-punctate. Propodeal declivity with a narrow lamella, its posterior (free) margin straight to concave below propodeal tooth. Katepisternum, metapleuron and side of propodeum entirely reticulate-punctate (in a few non-paratypic specimens there is a small patch on katepisternum where sculpture is weaker than elsewhere). Dorsum of petiole node finely reticulate-punctate; disc of postpetiole smooth. Hairs on first gastral tergite flagellate.

Paratype. TL 2.8, HL 0.70, HW 0.45, CI 64, ML 0.30, MI 43, SL 0.44, SI 98, PW 0.30, AL 0.77.

Dimensions of non-paratypic workers. TL 2.5-2.8, HL 0.64-0.72, HW 0.41-0.45, CI 63-65, ML 0.26-0.31, MI 41-43, SL 0.39-0.45, SI 93-100, PW 0.27-0.31, AL 0.68-0.76 (8 measured).

Type Material

Holotype worker, Australia: Queensland, Nurninbah Nat. Arch, 1200 ft, 3.ix.1964, rainforest (B. B. Lowery) (Australian National Insect Collection). Paratypes. 1 worker and 1 queen with same data as holotype (ANIC, The Natural History Museum).

References

  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 970, figs. 526, 542 worker described)