Polyrhachis murina

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Polyrhachis murina
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Myrma
Species group: aculeata
Species complex: pubescens
Species: P. murina
Binomial name
Polyrhachis murina
Emery, 1893

Polyrhachis murina casent0905612 p 1 high.jpg

Polyrhachis murina casent0905612 d 1 high.jpg

Specimen Labels

Identification

A member of the Polyrhachis aculeata species group in the subgenus Myrma

Polyrhachis murina is morphologically a relatively stable species with specimens from Borneo and Sumatra closely comparable. Apart from some differences in the length of the pronotal spines, length and shape of the lateral petiolar spines and colour of the pubescence, which ranges from golden to silvery or just dull greyish, I found them all very similar and undoubtedly conspecific. (Kohout, 2013)

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

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

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes


Sexuals and immature stages unknown.

Nomenclature

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

  • murina. Polyrhachis murina Emery, 1893e: 198 (w.) BORNEO. Combination in P. (Myrma): Wheeler, W.M. 1919e: 123.

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

Kohout (2013) - In his original description of P. murina, Emery (1893) listed Sarawak in Borneo and Jolo in the Philippines as localities for his new species, evidently considering specimens from both locations to be conspecific. I have examined two syntype workers of P. murina from Sarawak in the Emery collection in Genova (Museo Civico di Storia Naturale, Genoa), both bearing identical labels as follows: ‘Sarawak, Bedot’ and ‘Polyrhachis murina Emery’. I have also examined three additional specimens from Sumatra, deposited in the general collection of that museum and labelled ‘P. murina teste Emery’, and several specimens identified as P. murina from the Philippines. This examination has shown that specimens from the Philippines stand well apart from the syntypes of P. murina from Sarawak, with a number of characters exceeding the variability that would be expected between different populations of a single biological species. I therefore believe that the Philippine specimens represent a different species from P. murina, which is described as Polyrhachis starri.

Description

Worker

Kohout (2013) - Dimensions (lectotype cited first): TL c. 6.75, 6.55-7.00; HL 1.78, 1.75-1.87; HW 1.40, 1.34-1.43; CI 79, 75-79; SL 2.21, 2.12-2.31; SI 158, 158-165; PW 1.22, 1.15-1.28; MTL 2.21, 2.12-2.31 (1+4 measured).

Type Material

Kohout (2013) - Lectotype designation. To establish the nomenclatural stability of Polyrhachis murina and to prevent any future selection of a lectotype from specimens other than those from Sarawak, I here designate, in accordance with Article 74.7.3 of the International Code of Zoological Nomenclature (1999), one of the syntype workers from Sarawak mentioned above as the lectotype of Polyrhachis murina Emery, 1893. The specimen is lodged in the Emery collection (Museo Civico di Storia Naturale, Genoa) and, in addition to the labels listed above, it now also bears a red tag: ‘Lectotype, Polyrhachis murina Emery, 1893, designated by R.J. Kohout, 2013’. The remaining specimens of the original series consequently become paralectotypes and are labelled accordingly.

References

  • Baltazar, C. R. 1966. A catalogue of Philippine Hymenoptera (with a bibliography, 1758-1963). Pac. Insects Monogr. 8: 1-488 (page 277, listed)
  • Emery, C. 1893g. Formicides de l'Archipel Malais. Rev. Suisse Zool. 1: 187-229 (page 198, worker described)
  • Kohout, R. J. 2013. A review of the Polyrhacis aculeata species-group of the subgenus Myrma Billberg (Hymenoptera: Formicidae), with keys and descriptions of new species. Australian Entomologist. 40:137-171.
  • Wheeler, W. M. 1919f. The ants of Borneo. Bull. Mus. Comp. Zool. 63: 43-147 (page 123, Combination in P. (Myrma))