Polyrhachis montana

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Polyrhachis montana
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Polyrhachis
Species group: bihamata
Species: P. montana
Binomial name
Polyrhachis montana
Hung, 1970

Polyrhachis montana casent0906321 p 1 high.jpg

Polyrhachis montana casent0906321 d 1 high.jpg

Specimen Labels

This species is undoubtedly endemic to Borneo and is known only from the original collections made by E. Mjöberg at Mt Murud and Mt Dulit in Sarawak.

Identification

A member of the bihamata group of the subgenus Polyrhachis.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

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

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.

  • montana. Polyrhachis montana Hung, 1970: 23, figs. 16-22 (w.) BORNEO.

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

Description

Worker

Holotype: HW 2.20 mm, HL 2.43 mm, CI 90, SL 3.00 mm, SI 141, PW 1.13 mm, MPL 2.60 mm, MTL 4.13 mm, PSEI 200, PH 1.90 mm. Mandibles with 5 teeth sequentially reducing in length, the apical is about twice as long as the basals. Clypeus convex, slightly carinated. Head, excluding the mandibles, somewhat longer than broad, slightly rounded. Median ocellus present. No lateral ocelli. Alitrunk more or less rounded. Pronotum slightly marginated with two spines rather stout at base pointing outwards and curved with the tips slightly pointing backwards. Mesonotum with two widely separated pyramidal spines raising upwards, outwards and bending backwards at an angle greater than 90 degrees. Metanotal groove obscure. Propodeum with the basal face about three times as long as the declivity. Declivity with one inclined ridge on each side forming an isosceles triangle with the top angle and the bottom leg notched. No distinct ridge between the basal face and the declivity. Petiole columnar, but rather flattened, bearing two long hook-shaped spines diverging widely from their bases. Gaster slightly elliptical with the tergite of the first segment covering about two-fifths of the gaster. Body densely covered with light brown suberect hairs. Antennae and head very dusky red. Mandibles dusky red. Alitrunk and petiole moderate reddish-brown. Pronotal, mesonotal and petiolar spines black at tip. Legs dark reddish-brown. Gaster dark reddish-brown with the first segment slightly lighter.

Kohout (2014) - (paratypes): TL c. 10.73 – 10.99; HL 2.37 – 2.52; HW 2.12 – 2.24; CI 89 – 90; SL 2.87 – 3.17; SI 135 – 141; PW 1.10 – 1.16; PeH 2.07 – 2.17; PeI 86-89; MTL 4.03 – 4.38 (4 measured).

Type Material

Kohout (2014) - Holotype and paratype workers. Type locality: BORNEO, SARAWAK, Mt Murud, (E. Mjöberg), Museum of Comparative Zoology (Type 31773), National Museum of Natural History, Bernice P. Bishop Museum (examined).

References