Polyrhachis laevissima

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Polyrhachis laevissima
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Cyrtomyrma
Species: P. laevissima
Binomial name
Polyrhachis laevissima
Smith, F., 1858

MCZ-ENT001 Polyrhachis-laevissima hal.jpg

MCZ-ENT001 Polyrhachis-laevissima had.jpg

Specimen Label

Subspecies
Synonyms

Nothing is known about the biology of Polyrhachis laevissima.

Identification

Polyrhachis laevissima closely resembles Polyrhachis sulang, but the latter differs in having a distinctly lower and more evenly convex mesosomal profile. They also differ in the configuration of the petiolar spines, with those in Polyrhachis laevissima reduced to obtuse teeth, while the lateral teeth in Polyrhachis sulang are distinctly elongate. The legs in Polyrhachis laevissima are distinctly light red, while in Polyrhachis sulang the legs are darker with black coxae. (Kohout 2006)

Keys including this Species

Distribution

Polyrhachis laevissima is distributed from Myanmar and India to Thailand, Malaysia, Sumatra and Java, with more recent records from Borneo (Maliau Basin, Sabah).

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo, Indonesia, Malaysia.
Oriental Region: Bangladesh, Cambodia, India, Laos, Myanmar (type locality), Thailand.


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

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

  • laevissima. Polyrhachis laevissimus Smith, F. 1858b: 64, pl. 4, fig. 42 (w.) MYANMAR. Mayr, 1879: 651 (q.); Bingham, 1903: 402 (m.). Combination in P. (Cyrtomyrma): Wheeler, W.M. 1919e: 137. Senior synonym of globularia: Mayr, 1879: 651. See also: Kohout, 2006b: 113. Current subspecies: nominal plus dichroa.
  • globularia. Polyrhachis globularia Mayr, 1867a: 41 (w.) INDONESIA (Java). Junior synonym of laevissima: Mayr, 1879: 651.

Description

Worker

Length 2-1/4 lines. Black, smooth and shining, with the coxae, femora and tibiae ferruginous. Head large, wider than the thorax, the latter widest in front, gradually narrowed to the apex of the metathorax; the anterior margin of the thorax rounded, the lateral angles acute, the disk very convex, the metathorax oblique. The scale of the peduncle incrassate, subquadrate, the superior margin notched in the middle, the lateral angles produced and acute. Abdomen globose.

Queen

Femina: Long. 8-10 Mm. Nigra, pedibus ferugineis, tibiis basi tarsisque nigris; subnuda; tenuisime coriaceo-rugulosa et insuper punctulis valde superficialibus, dispersissime pilos microscopicos et brevissimos gerentibus; nitidissima, mandibuliS disperse punctatis et insuper, basi excepta, delicatule striolatis; clypeus absque carina mediana, margine antico in medio emarginato et bidentato; thorax inermis; petioli squama modice incrassata, obtrapezoidalis, margine sutperiore curvato, in medio modice emarginato, angulis acutis; alae infuscatae. (Mayr 1879)

Male

Similar to the queen, smaller; thorax shorter, proportionately deeper; mesonotum remarkably gibbous in front, head and abdomen very much smaller; wings as in the queen but a shade lighter in colour. Length, 6 mm. (Bingham 1903)

Type Material

MYANMAR (= Burma), col. Waring. Holotype worker from The Natural History Museum - as reported by Kohout (2006).

References

  • Bingham, C. T. 1903. The fauna of British India, including Ceylon and Burma. Hymenoptera, Vol. II. Ants and Cuckoo-wasps. London: Taylor and Francis, 506 pp. (page 402, male described)
  • Hasin, S., Tasen, W. 2020. Ant community composition in urban areas of Bangkok, Thailand. Agriculture and Natural Resources 54: 507-514 (doi:10.34044/j.anres.2020.54.5.07).
  • Kohout, R. J. 2006. Review of Polyrhachis (Cyrtomyrma) Forel (Hymenoptera: Formicidae: Formicinae) of Australia, Borneo, New Guinea and the Solomon Islands with descriptions of new species. Memoirs of the Queensland Museum. 52:87-146.
  • Mayr, G. 1879. Beiträge zur Ameisen-Fauna Asiens. Verh. K-K. Zool.-Bot. Ges. Wien 28: 645-686 (page 651, queen described, Senior synonym of globularia)
  • Smith, F. 1858a. Catalogue of hymenopterous insects in the collection of the British Museum. Part VI. Formicidae. London: British Museum, 216 pp. (page 64, pl. 4, fig. 42 worker described)
  • Wheeler, W. M. 1919f. The ants of Borneo. Bull. Mus. Comp. Zool. 63: 43-147 (page 137, Combination in P. (Cyrtomyrma))

References based on Global Ant Biodiversity Informatics

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