Colobostruma papulata

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Colobostruma papulata
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Colobostruma
Species: C. papulata
Binomial name
Colobostruma papulata
Brown, 1965

MCZ-31163 Colobostruma papulata holotype side.jpg

MCZ-31163 Colobostruma papulata holotype top.jpg

Specimen labels

This rare species is known from a single collection from the sand plain heath of south-western Western Australia. Nothing is known of its biology.

Identification

This species is similar to Colobostruma froggatti in form of sculpture and narrow, elongate mandibles. It differs in having the ridges above the eyes diverging anteriorly rather than converging (Shattuck 2000).

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

Beyond what is stated in the introduction at the top of this page, little is know about the biology of Colobostruma papulata. Until further studies reveal more about this species we can infer that its natural history and biology should be similar to other species in this genus. In general Colobostruma can be locally common although they are often overlooked. Most species have small colonies with less than 100 workers, and workers will lie motionless when disturbed. Nests can occur in soil usually under rocks, in cracks in rocks or in rotten logs. Only a single rainforest species is known to nest arboreally. Foraging is usually on the ground at night but occasionally they are found foraging on mallee. They are also commonly found in leaf litter.

Castes

Nomenclature

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

  • papulata. Colobostruma papulata Brown, 1965a: 21, fig. 1 (w.) AUSTRALIA. See also: Shattuck, in Bolton, 2000: 43.

Type Material

  • Holotype, worker, Telegraph Hill (as Dempster Head) at Esperance, Western Australia, Australia, 4-6 February 1955, E.O. Wilson, Museum of Comparative Zoology.
  • Paratype, 1 worker, Telegraph Hill (as Dempster Head) at Esperance, Western Australia, Australia, 4-6 February 1955, E.O. Wilson, Museum of Comparative Zoology.

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) - TL 2.4, HL 0.63, HW 0.49, CI 78, ML 0.18, MI 29, SL 0.29, SI 59, PW 0.32, AL 0.61. Anterior region of head rounding gradually from the dorsal to lateral surfaces, not phragmotic. Ridges immediately in front of eyes straight or nearly so, diverging anteriorly. Frontal lobes and lateral margins of clypeus smooth relative to the surrounding surface of the head. Mandibles relatively thin and elongate, their outer margins very weakly concave. Hairs absent from dorsum of head. Posterior margin of head shallowly concave. Antenna with 6 segments, the scape elbowed and with a well developed subbasal lobe. In dorsal view the widest point of the pronotum is at the humeral angles. Propodeum high, its posterior face approximately the same height as the petiolar node and with broad, thin lamellae; in profile the pronotum and mesonotum each flat, meeting in a slight angle. Lateral postpetiole drawn outwards into thin flange-like wings, the wings with translucent windows along their posterior margins only, the windows small. First gastral tergite with weak, indistinct reticulate sculpture and a limited number of low, widely spaced carinae on the anterior one-quarter. Body colour pale honey yellow, the head very slightly darker.

References