Strumigenys zygon

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

This species has been found in litter-samples of a dry rainforest and eucalyptus open-forest.

Identification

Bolton (2000) - A member of the smythiesii complex in the Strumigenys godeffroyi-group. This species is unique in the complex as it is the only Austral member to combine small size with the presence of two freely laterally projecting hairs on the upper scrobe margin and dense decumbent gastral pubescence. See also notes under Strumigenys friedae.

Keys including this Species

Key to Australian Strumigenys Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: -23.08° to -23.13333°.


North Temperate	North Subtropical	Tropical	South Subtropical	South Temperate

Source: AntMaps

Distribution based on Regional Taxon Lists

Australasian Region: Australia (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.

Elevation Range

Occurrence at collecting sites during elevational surveys of rainforest in the Eungella region, Queensland, Australia (Burwell et al., 2020).
Species	Elevation (m asl)
Species	200	400	600	800	1000	1200
Strumigenys zygon		30-40	40-50	0-10	0-10
Shading indicates the bands of elevation where species was recorded. Numbers are the percentage of total samples containing this species.

Biology

Castes

Nomenclature

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

zygon. Strumigenys zygon Bolton, 2000: 971 (w.) 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 1.7, HL 0.45, HW 0.33, CI 73, ML 0.19, MI 42, SL 0.26, SI 79, PW 0.21, AL 0.46. With characters of smythiesii-complex. Apicoscrobal hair fine, subflagellate; upper scrobe margin also with a second projecting subflagellate hair, at about the level of the eye. Cephalic dorsum finely reticulate-punctate and with inconspicuous short slender ground-pilosity. Cephalic dorsum usually with a pair of short fine standing hairs, located close to midline near occipital margin; these hairs frequently lost or flattened down and inconspicuous, sometimes apparently absent. Eye small, with less than 10 ommatidia in total. Pronotal humeral hair flagellate; mesonotum with a single pair of erect fine flagellate hairs. Dorsal alitrunk finely reticulate-punctate; pronotal dorsum usually with some very fine longitudinal rugulae and intensity of sculpture may be reduced on propodeal dorsum. Propodeal declivity with posterior (free) margin of lamella shallowly convex to shallowly concave. Mesopleuron, metapleuron and side of propodeum entirely smooth and shining. Disc of postpetiole smooth and shining. First gastral tergite with characteristic pilosity: a few fine or looped erect hairs present but surface of sclerite with conspicuous decumbent pubescent hairs that are relatively long, soft and curved, and directed medially or posteromedially.

Paratypes. TL 1.7, HL 0.46, HW 0.32-0.33, CI 70-72, ML 0.18-0.19, MI 40-41, SL 0.26, SI 79-80, PW 0.21, AL 0.43-0.45 (2 measured).

Dimensions of non-paratypic workers. TL 1.7-1.9, HL 0.45-0.48, HW 0.32-0.36, CI 70-75, ML 0.18-0.22, MI 40-46, SL 0.24-0.28, SI 73-80 (8 measured).

Type Material

Holotype worker, Australia: Queensland (MEQ), Yeppoon, 27.iv.1979, QM Berlesate no. 70, 23.08S, 150.45E, dry rainforest, 20 m., sieved litter (G. B. Monteith) (Australian National Insect Collection). [Holotype is upper specimen of two on pin.] Paratypes. 2 workers with same data as holotype (ANIC, The Natural History Museum).

Holotype, worker, Yeppoon, Queensland, Australia, Monteith,G.B., ANIC32-017714, Australian National Insect Collection.
Paratype, 1 worker, Yeppoon, Queensland, Australia, Monteith,G.B., ANIC32-017715, Australian National Insect Collection.
Paratype, 1 worker, Yeppoon, Queensland, Australia, The Natural History Museum.

References

Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 971, worker described)
Burwell, C.J., Nakamura, A. 2020. Rainforest ants (Hymenoptera: Formicidae) along an elevational gradient at Eungella in the Clarke Range, Central Queensland coast, Australia. Proceedings of the Royal Society of Queensland 125: 43-63.

References based on Global Ant Biodiversity Informatics

Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65