Monomorium torrens

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Monomorium torrens
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Monomorium
Species: M. torrens
Binomial name
Monomorium torrens
Sparks, 2015

Little is known about the biology of Monomorium torrens.


Sparks et al. (2015) - A member of the M. rothsteini complex. A small light to dark brown species with large eyes and a sinuous to almost straight clypeus. The mesonotum is almost entirely smooth and the petiole node is narrow.

Keys including this Species


This species is known from Adelaide and the Flinders Rangers in South Australia.

Distribution based on Regional Taxon Lists

Australasian Region: Australia (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb



COI sequences. Genbank accession numbers for this species are KC572924 and KC573001.



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

  • torrens. Monomorium torrens Sparks, in Sparks, Andersen & Austin, 2015: 527, figs. 8g–i, 11g (w.) AUSTRALIA.

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



(n=9). HW 0.62–0.82, HL 0.70–0.84, EL 0.15–0.18, PMH 0.25–0.29, PH 0.21–0.25, PNH 0.16–0.18, LHW 0.41–0.49, EW 0.10–0.12, PML 0.43–0.51, ML 0.72–0.84, PL 0.31–0.37, PNWdv 0.18–0.21.

Small species with a small, rectangular head; posterior cephalic margin shallowly depressed medially. Anterodorsal margin of the clypeus sinuous to almost straight, frontolateral carinae forming smooth ridges; anteroventral margin without a small median projection, margin appears straight; sculpture on frons limited to a few strigae only present on antennal lobes; coarse lateral cephalic strigae not reach anterior eye margin, a few very fine strigae may reach eye margin. Eyes large, EW > 0.23 x LHW, 13 ommatidia in longest vertical axis, 10 in longest horizontal axis, in full face view situated in from of lateral head margin.

Mesonotum smooth and shining, metanotal groove sculpture extending just into lateral and posterior portions of posterior region. Mesopleuron and lateral surface of propodeum alveolate, strigae extending anteriorly from metapleural gland bulla and almost reaching metanotal groove. Propodeum in lateral view with dorsolateral angles clearly forming an obtuse angle; dorsally with anterior transverse carinae completely absent in a majority of specimens when present very weakly so, transverse and longitudinal strigae absent. Petiole node narrow, less than 2 x eye width when viewed from above; shape in posterior view tapering to a narrow point, in lateral view anterior and posterior faces converging to a narrowly rounded point. Petiole node smooth and shining, some specimens with fine reticulate sculpture along posterior basal margin, postpetiole without sculpture.T1 completely smooth and without sculpture.

Head and mesosoma light to dark brown with a reddish-orange tinge, petiole and postpetiole somewhat darker, legs brown, metasoma dark brown.

Type Material

Holotype worker. South Australia, Flinders Ranges, Dingly Dell, -31.3500, 138.7000, 8 Apr 2008, K. Sparks, KSS4 (deposited in South Australian Museum) . Paratypes. South Australia. 19 workers, same data as holotype; 10 workers, Adelaide, -34.9177, 138.6036, 10 Nov 2011, K. Sparks, KSS242 (deposited in SAM).


The specific name is a noun in apposition and refers to the river that runs through Adelaide, the type locality.


  • Sparks, K.S., Andersen, A.N. and Austin, A.D. 2015. Systematics of the Monomorium rothsteini Forel species complex (Hymenoptera: Formicidae), a problematic ant group in Australia. Zootaxa. 3893:489–529. doi:10.11646/zootaxa.3893.4.2