Rotastruma recava

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Rotastruma recava
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Rotastruma
Species: R. recava
Binomial name
Rotastruma recava
Bolton, 1991

Rotastruma recava casent0010807 profile 1.jpg

Rotastruma recava casent0010807 dorsal 1.jpg

Specimen labels

Bolton noted that nests contained more than one dealate queen. Specimens have been collected in rainforest from dead twigs.

Identification

  • With head in full-face view the occipital margin conspicuously concave, the sides of the head convex. (Singapore; East Malaysia: Sarawak) . . . . . Rotastruma recava
  • With head in full-face view the occipital margin more or less transverse, the sides of the head approximately straight. (China: Guangdong) . . . . . Rotastruma stenoceps

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo (type locality), Indonesia, Malaysia, Singapore.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Queen

Male

Nomenclature

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

  • recava. Rotastruma recava Bolton, 1991: 9, figs. 12, 14 (w.q.) BORNEO.

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 3.6, HL 0.80, HW 0.69, CI 86, SL 0.56, SI 81, PW 0.48, AL 0.94. Maximum diameter of eye 0.24 (0.35 x HW). Mandibles finely longitudinally striolate. Central strip of dorsum of head with a number of longitudinal costulae which may run the length of the head or may be broken or interrupted. Occipital margin distinctly concave in full-face view, the sides of the head in front of the large eyes convex. Median portion of clypeus with 3 longitudinal carinae. Dorsal alitrunk with predominantly longitudinal sharp rugulae; cross-meshes present, especially on pronotum. Sides of alitrunk marginate, margination sharpest on mesonotum and propodeum. Propodeal spines long, depressed and down-curved along their length. Sides of alitrunk with weak longitudinal rugulae. Petiole and postpetiole rugulose to reticulate-rugulose dorsally. First gastral tergite unsculptured except for sparse short basi gastral costulae and feeble superficial reticular patterning. Standing hairs present on all dorsal surfaces, short fine and acutely pointed. Colour yellow, the first gastral tergite with a broad brown band.

Paratype. TL 3.6-4.0, HL 0.80-0.84, HW 0.66-0.70, CI83-86, SL 0.56-0.60, SI 81-86, PW 0.48-0.52, AL 0.94-1.02. Maximum diameter of eye 0.24-0.26 (0.35-0.37 x HW) (10 measured). As holotype.

Queen

Paratype. TL 3.9-4.0, HL 0.80-0.81, HW 0.69-0.70, CI 85-86, SL 0.54-0.56, Sl 78-81, PW 0.56-0.58, AL 1.08-1.12. Maximum diameter of eye 0.26-0.28 (0.37-0.40 x HW) (4 measured). The females are small, only the same size as the workers or slightly larger. Alate when virgin and with a complete complement of flight sclerites.

Type Material

Holotype worker, East Malaysia: Sarawak, 4th Division G. Mulu NP, 22.v.1978, mixed dipterocarp forest, on tree (N. M. Collins) (The Natural History Museum).

Paratypes, 18 workers and 2 females, Singapore: Bukit Timah Forest, 15.iii.1973 (D. H. Murphy); 2 workers and 2 females, Bukit Timah, 100 m, 8.iv.1989, no. 10254, ex dead twig, vine, rainforest (P. S. Ward) (BMNH; Museum of Comparative Zoology; Musee d'Histoire Naturelle Genève).

References