Polyrhachis numeria

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Polyrhachis numeria
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. numeria
Binomial name
Polyrhachis numeria
Smith, F., 1861

Polyrhachis numeria casent0901872 p 1 high.jpg

Polyrhachis numeria casent0901872 d 1 high.jpg

Specimen Labels

Synonyms

Polyrhachis numeria appears to be a rare species and, in spite of examination of several collections gathered during the 1985 ‘Project Wallace’ by N.E. Stork and M.J.D. Brendell (BMNH), C. van Achterberg (RMNH) and subsequently by other collectors, namely B. Gobin (KULB), K. Ogata & K. Masaoka (ITAK), I. Ketterl (SMNS), J. Constant (IRSN), M.M. Bos (GUGG) and S. Yamane (KUKJ), the holotype is the only specimen recorded from Sulawesi. (Kohout, 2013)

Identification

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

This species is superficially very similar to Polyrhachis diana described by Wheeler (1909) from Mindanao. However, recent examination and direct comparison of the P. diana syntypes with the holotype of P. numeria indicate that they are distinct species. In P. numeria the eyes are weakly posteriorly truncate, the superior edge of antennal scapes has numerous, relatively short hairs and all dorsal body surfaces have rather abundant, moderately long, golden hairs. In contrast, the eyes in P. diana are normal, the antennal scapes lack hairs and the body pilosity is confined to the front of the head and venter and apex of the gaster. Also, the pronotal spines in P. numeria are somewhat shorter with broad and dorsally flat bases, while they are longer and more slender with distinctly dorsomedially flattened bases in P. diana.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Indonesia (type locality), Sulawesi.
Oriental Region: India.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Male and immature stages unknown.

Worker

Nomenclature

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

  • numeria. Polyrhachis numeria Smith, F. 1861b: 42, pl. 1, fig. 25 (w.) INDONESIA (Sulawesi). Combination in P. (Myrma): Emery, 1925b: 201. Senior synonym of schizospina: Kohout, 1998: 527.
  • schizospina. Polyrhachis (Johnia) schizospina Karavaiev, 1927e: 44, fig. 20 (q.) INDONESIA (Prinsen I.). Combination in P. (Aulacomyrma): Hung, 1967b: 402. Junior synonym of numeria: Kohout, 1998: 527.

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

Description

Worker

Kohout (2013): Dimensions (holotype): TL c. 6.50; HL 1.65; HW 1.28; CI 77; SL 2.03; SI 158; PW 1.34; MTL 1.96.

Queen

Kohout (2013) - Dimensions (P. schizospina holotype): TL c. 7.96; HL 1.81; HW 1.40; CI 77; SL 2.12; SI 151; PW 1.52; MTL 2.18.

Type Material

The following notes on F. Smith type specimens have been provided by Barry Bolton (details): Polyrhachis numeria: Holotype worker in Oxford University Museum of Natural History. Labelled “Tond.” (= Tondano, Sulawesi) and with a Donisthorpe type-label.

Kohout (2013) - Polyrhachis (Johnia) schizospina Holotype queen. Indonesia, Prinsen Island in Sunda Strait (Karavaiev #2397) Institute of Zoology, Academia Sinica (Chinese Academy of Sciences) (examined).

References