Colobostruma alinodis

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Colobostruma alinodis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Colobostruma
Species: C. alinodis
Binomial name
Colobostruma alinodis
(Forel, 1913)

Colobostruma alinodis P casent0280686.jpg

Colobostruma alinodis D casent0280686.jpg

Specimen Label

This widespread species can be abundant in some areas within its range. It can be found nesting under rocks in a variety of habitats, from dry sclerophyll to rainforest.

Identification

The presence of a 4-segmented antenna with an elongate second funicular segment will separate this taxon from others in the alinodis-group (Shattuck 2000).

Keys including this Species

Distribution

Known from Queensland, New South Wales, Victoria and Tasmania.

Distribution based on Regional Taxon Lists

Australasian Region: Australia (type locality).

Check distribution from AntMaps.

Distribution based on specimens

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The above specimen data are provided by AntWeb. Please see Colobostruma alinodis for further details

Biology

Brown (1954) - Colobostruma alinodis has been taken in moist or wet sclerophyll forest, often near or in clearings. On three occasions I took this ant, twice in the Dandenongs and once on Tamborine Mountain, southeastern Queensland, in each case under a stone also covering a flourishing nest of one of the common and dominant Rhytidoponera ("Chalcoponera") species, commonly infested with unpigmented entomobryid collembolans. I have not myself seen, nor do I know of other records definitely stating, that this species or its close relatives show any preference for nest sites near or in Rhytidoponera nests except as indicated by my three collections.

Castes

Nomenclature

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

  • alinodis. Epopostruma alinodis Forel, 1913g: 179, pl. 2, figs. 1, 2 (w.q.) AUSTRALIA. Crozier, 1968b: 88 (k.); Wheeler, G.C. & Wheeler, J. 1973c: 211 (l., misspelled as alata). Combination in Clarkistruma: Brown, 1948e: 124; in Colobostruma: Brown & Wilson, 1959b: 281. See also: Shattuck, in Bolton, 2000: 34.

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

Description

Worker

Shattuck (2000) - WORKER. TL 2.2 - 3.4, HL 0.52 - 0.80, HW 0.48 - 0.66, CI 81 - 92, ML 0.13 - 0.17, MI 20 - 25, SL 0.24 - 0.47, SI 50 - 70, PW 0.32 - 0.43, AL 0.59 - 0.91 (7 measured). Anterior region of head rounding gradually from the dorsal to lateral surfaces, not phragmotic. In full-face view ridge immediately in front of eye weakly defined, concave. Frontal lobes and lateral margins of clypeus smooth relative to surrounding surface of the head. Mandibles broadly triangular. Hairs on dorsum of head scattered, thin. Posterior margin of head uniformly concave. Antenna with 4 or 5 segments, when 5-segmented the third funicular segment from the base is much shorter than the second segment; the second funicular segment long, more than twice the length of the first segment. Scape strongly elbowed and without a subbasal lobe. In dorsal view the widest point of the pronotum is at the humeral angles. Propodeum high, its posterior face greater in height than the petiolar node and with broad, thin lamellae; in profile the dorsum of the alitrunk essentially flat. Lateral postpetiole drawn outwards into thin flange-like wings, the wings with translucent windows along both their anterior and posterior margins, the windows separated by a narrow band of thickened integument and the anterior windows smaller than the posterior windows. First gastral tergite smooth, superimposed with low, closely spaced carinae on the anterolateral corners. Body colour yellow-brown to dark brown, dorsum of head and alitrunk often slightly darker, antennae and legs slightly lighter, gaster often with a slightly darker, broad medial band.

Type Material

References

  • Bolton, B. 2000. The ant tribe Dacetini. Mem. Am. Entomol. Inst. 65: 1-1028 (page 34, see also)
  • Brown, W. L., Jr. 1948e. A preliminary generic revision of the higher Dacetini (Hymenoptera: Formicidae). Trans. Am. Entomol. Soc. 74: 101-129 (page 124, Combination in Clarkistruma)
  • Brown, W. L., Jr. 1954b. A preliminary report on dacetine ant studies in Australia. Ann. Entomol. Soc. Am. 46: 465-471 PDF
  • Brown, W. L., Jr.; Wilson, E. O. 1959b. The evolution of the dacetine ants. Q. Rev. Biol. 34: 278-294 (page 281, Combination in Colobostruma)
  • Crozier, R. H. 1968c. The chromosomes of three Australian dacetine ant species (Hymenoptera: Formicidae). Psyche (Camb.) 75: 87-90 (page 88, karyotype described)
  • Forel, A. 1913h. Fourmis de Tasmanie et d'Australie récoltées par MM. Lae, Froggatt etc. Bull. Soc. Vaudoise Sci. Nat. 49: 173-195 (page 179, pl. 2, figs. 1, 2 worker, queen described)
  • Shattuck, S. O. 2000. Genus Colobostruma. Genus Mesostruma. Genus Epopostruma. Pp. 31-67 in: Bolton, B. The ant tribe Dacetini. Mem. Am. Entomol. Inst. 65: 1-1028
  • Wheeler, G. C.; Wheeler, J. 1973c. The ant larvae of the tribes Basicerotini and Dacetini: second supplement (Hymenoptera: Formicidae: Myrmicinae). Pan-Pac. Entomol. 49: 207-214 (page 211, larva described)