Aenictus luzoni

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Aenictus luzoni
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dorylinae
Genus: Aenictus
Species: A. luzoni
Binomial name
Aenictus luzoni
Wheeler, W.M. & Chapman, 1925

Aenictus luzoni casent0217378 p 1 high.jpg

Aenictus luzoni casent0217378 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Aenictus luzoni.

Identification

A member of the laeviceps species group. A. luzoni is most similar to Aenictus alticola in having the subpetiolar process low and anteriorly angulate. (Jaitrong and Yamane 2011)

Keys including this Species

Distribution

Known from Luzon and Negros, Philippines.

Distribution based on Regional Taxon Lists

Indo-Australian Region: Philippines (type locality).


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Little is known about the biology of Aenictus luzoni. The genus is comprised of species that live an army ant lifestyle. Aenictus typically prey on other ants, from other genera, or other insects such as wasps or termites. There are reports of Aenictus preying on other insects as well and even have been observed collecting honeydew from homopterans (Santschi, 1933; Gotwald, 1995) but this appears, at least from available evidence, to be uncommon. Foraging raids can occur day or night across the ground surface. Occasionally raids are arboreal. During a raid numerous workers attack a single nest or small area, with several workers coordinating their efforts to carry large prey items back to the nest or bivouac. Aenictus have a nomadic life style, alternating between a migratory phase in which nests are temporary bivouacs in sheltered places above the ground and a stationary phase where semi-permanent underground nests are formed. During the nomadic phase bivouacs move regularly, sometimes more than once a day when larvae require large amounts of food. Individual nests usually contain up to several thousand workers, although nest fragments containing only a few hundred workers are often encountered. Queens are highly specialised and look less like workers than in most ant species. They have greatly enlarged gasters (dichthadiform) and remain flightless throughout their life. New colonies are formed by the division of existing colonies (fission) rather than by individual queens starting colonies on their own.

Castes

Known only from the worker caste.

Nomenclature

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

  • luzoni. Aenictus luzoni Wheeler, W.M. & Chapman, 1925: 48, pl. 1, figs. 1, 2 (w.) PHILIPPINES. See also: Wilson, 1964a: 470; Jaitrong & Yamane, 2011: 40.
  • wayani. Aenictus wayani Jaitrong & Yamane, 2011: 22, figs. 20-22 (w.) INDONESIA (Sulawesi).

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

Description

Worker

Jaitrong and Yamane (2011) - Measurements. Worker lectotype and paralectotype (n = 2): TL 3.95– 4.00 mm; HL 0.85–0.88 mm; HW 0.78 mm; SL 0.73–0.75 mm; ML 1.38–1.43 mm; PL 0.33 mm; CI 89–91; SI 94–97.

Lectotype and paralectotype - Head in full-face view slightly longer than broad, with sides and posterior margin feebly convex; occipital margin bearing a carina. Antennal scape relatively short and thin, not reaching the posterolateral corner of head; antennal segments II–X each longer than broad; II slightly longer than each of III–VII. Frontal carina short, slightly extending beyond the posterior margin of torulus.

Wilson 1964 Army Ant fig 15-20

Anterior margin of clypeus convex, bearing several denticles. Masticatory margin of mandible with a large apical tooth followed by a medium-sized subapical tooth, 4 denticles, and a medium-sized basal tooth; basal margin lacking denticles. Mesosoma relatively slender; promesonotum in profile convex dorsally and sloping gradually to metanotal groove; dorsal outline of propodeum almost straight; area between propodeal spiracle and metanotal gland bulla impressed; propodeal junction rounded; declivity feebly concave, not margined dorsally and laterally. Petiole relatively short, almost as long as high; its node in dorsal outline strongly convex; subpetiolar process weakly developed, triangular, apex directed downward and forward; postpetiole almost as long as petiole. Entire head including antennal scape smooth and shiny. Mandible very finely striate except along masticatory margin. Mesosoma entirely smooth and shiny, except for metapleuron and metanotal groove that have irregular longitudinal rugae; propodeal dorsum with about 3–5 short longitudinal rugae. Petiole and postpetiole entirely smooth and shiny. Legs entirely smooth and shiny.

Head and mesosoma dorsally with relatively sparse standing hairs mixed with sparse short hairs over the surface; longest pronotal hair 0.20 mm long. Entire body reddish-brown. Typhlatta spot located anterior to occipital corner.

Type Material

Jaitrong and Yamane (2011) - Two syntype workers from Philippines, Luzon, Ilocos Norte Prov., Bangui (Museum of Comparative Zoology, examined). One worker is selected as the lectotype, the other as paralectotype.

References

  • Chapman, J. W.; Capco, S. R. 1951. Check list of the ants (Hymenoptera: Formicidae) of Asia. Monogr. Inst. Sci. Technol. Manila 1: 1-327 (page 13, checklist)
  • Jaitrong, W. & Yamane, S. 2011. Synopsis of Aenictus species groups and revision of the A. currax and A. laeviceps groups in the eastern Oriental, Indo-Australian, and Australasian regions (Hymenoptera: Formicidae: Aenictinae). Zootaxa, 3128, 1–46. PDF
  • Wheeler, W. M.; Chapman, J. W. 1925. The ants of the Philippine Islands. Part I, Dorylinae and Ponerinae. Philippine Journal of Science. 28: 47-73 (page 48, pl. 1, figs. 1, 2 worker described)
  • Wilson, E. O. 1964a. The true army ants of the Indo-Australian area (Hymenoptera: Formicidae: Dorylinae). Pacific Insects. 6: 427-483 (page 470, see also)