Polyrhachis levior

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Polyrhachis levior
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Cyrtomyrma
Species: P. levior
Binomial name
Polyrhachis levior
Roger, 1863

Polyrhachis levior casent0901809 d 1 high.jpg

Specimen Labels

Synonyms

Polyrhachis levior is known only by the unique holotype (missing its head) from Aru Island, Indonesia (Kohout 2006). Nothing is known about this species' biology.

Identification

Its distinctly bilobed pronotal humeri resemble those of Polyrhachis albertisi. The mesosoma features a rather steeply raised pronotum and weakly convex mesonotum and propodeum. The promesonotal suture is distinct but the metanotal groove lacking, its position indicated only by a slight depression in the mesosomal outline. The propodeal spines are relatively long, somewhat dorso-ventrally compressed, directly dorso-laterally and posteriorly, with their bases set well apart. The dorsum of the petiole is furnished with four sharp teeth of equal length. (Kohout 2006)

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: Australia.
Indo-Australian Region: Indonesia (type locality), New Guinea.
Palaearctic Region: China.

Distribution based on specimens

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The above specimen data are provided by AntWeb. Please see Polyrhachis levior for further details


Abundance

Known only from the single type specimen.

Biology

Castes

Known only from the (type) worker.

Nomenclature

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

  • laevissimus. Polyrhachis laevissimus Smith, F. 1859a: 141 (w.) INDONESIA (Aru I.). [Junior primary homonym of laevissima Smith, above.] Replacement name: levior Roger, 1863b: 8.
  • levior. Polyrhachis levior Roger, 1863b: 8. Replacement name for laevissimus Smith, F. 1859a: 141. [Junior primary homonym of laevissima Smith, 1858b: 64.] Combination in P. (Cyrtomyrma): Forel, 1915b: 110. Subspecies of rastellata: Forel, 1902h: 527. Revived status as species: Donisthorpe, 1938c: 248; Taylor & Brown, D.R. 1985: 137. See also: Kohout, 2006b: 130.

The following notes on F. Smith type specimens have been provided by Barry Bolton (details):

Polyrhachis laevissimus

Holotype worker in Oxford University Museum of Natural History. Labelled “Aroo 25” (= Aru I., New Guinea) and with a Donisthorpe type-label, and also with a Donisthorpe det. label “levior Roger.” Head of holotype is missing.

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

Type Material

Description

Worker

Length 2 3/4 lines. Black, very smooth and shining; the legs ferruginous, with the coxae, articulations, and the tarsi black. The thorax: not flattened above, or margined at the sides; the division between the pro- and mesothorax distinct, that between the meso and metatborax not discernible, the latter with two erect acute spines; the scale of the petiole with four short acute spines. Abdomen globose.

Type Material

Holotype worker. Oxford University Museum of Natural History; Junior homonym of P. laevissima Fr. Smith, 1858:64 – as reported in Kohout (2006).

Type Locality Information

INDONESIA, Aru Island, col. A.R. Wallace.

References

  • Donisthorpe, H. 1938c. The subgenus Cyrtomyrma Forel of Polyrhachis Smith, and descriptions of new species, etc. Ann. Mag. Nat. Hist. 11(1): 246-267 (page 248, Revived status as species)
  • Forel, A. 1902j. Fourmis nouvelles d'Australie. Rev. Suisse Zool. 10: 405-548 (page 527, Race of rastellata)
  • Forel, A. 1915b. Results of Dr. E. Mjöbergs Swedish Scientific Expeditions to Australia 1910-13. 2. Ameisen. Ark. Zool. 9(1 16: 1-119 (page 110, Combination in P. (Cyrtomyrma))
  • 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.
  • Roger, J. 1863b. Verzeichniss der Formiciden-Gattungen und Arten. Berl. Entomol. Z. 7(B Beilage: 1-65 (page 8, Replacement name for laevissimus)
  • Smith, F. 1859a. Catalogue of hymenopterous insects collected by Mr. A. R. Wallace at the islands of Aru and Key. [part]. J. Proc. Linn. Soc. Lond. Zool. 3: 132-158 (page 141, [Junior primary homonym of laevissima Smith, 1858b: 64.])
  • Taylor, R. W.; Brown, D. R. 1985. Formicoidea. Zool. Cat. Aust. 2:1- 149: 1-149, 30 (page 137, Revived status as species)