Polyrhachis orbihumera

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Polyrhachis orbihumera
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Cyrtomyrma
Species: P. orbihumera
Binomial name
Polyrhachis orbihumera
Xu, Z., 2002

Polyrhachis orbihumera p.jpg

Polyrhachis orbihumera d.jpg

The types were collected from warm pine forest.

Identification

Xu (2000) - Close to Polyrhachis rastellata, but body surface densely, finely and superficially punctured, not smooth and less shiny; petiolar node with median teeth elongate and distinctly longer than lateral ones; tibiae blackish brown or black.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Palaearctic Region: China (type locality).

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 New General Catalogue, a catalogue of the world's ants.

  • orbihumera. Polyrhachis (Cyrtomyrma) orbihumera Xu, 2002b: 526, figs. 26-29 (w.q.) CHINA.

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

Description

Worker

Holotype. TL 5.1, HL 1.50, HW 1.50, CI 100, SL 1.75, SI 117, PW 1.15, AL 1.80, ED 0.45, MTL 2.00. Head about as broad as long, roughly triangular. Occipital margin roundly convex, occipital corners rounded. Lateral sides weakly convex. Mandibles with 5 teeth. Clypeus weakly convex. without longitudinal central carina, anterior margin with a pair of small denticles and weakly emarginate between the denticles. Antennae long, scape surpassing the occipital corner by about 3/5 of its length. Eyes placed at the occipital corners. In profile view, dorsum of alitrunk strongly convex. Promesonotal suture distinct, metanotal groove absent. Propodeum unarmed, dorsum and declivity weakly depressed and separated by a blunt convex. In dorsal view, shoulders of pronotum rounded. In front view, petiolar node with lateral teeth short and rightly angled, median teeth elongate and acute, distinctly longer than the lateral ones. In profile view petiolar node triangular, median teeth slightly bent backward. Mandibles densely and finely striate and sparsely punctured, relatively dull. Head, alitrunk and petiole uniformly, densely and superficially punctured, less shiny, gaster with similar punctures but weaker and shiny. The whole body with sparse depressed short pubescence. Anterior part of head with sparse erect hairs, mesonotum with a pair of erect hairs, ventral face and apex of gaster with abundant suberect hairs. Occiput, pronotum, propodeum, petiole and dorsum of first gastral segment without erect hairs. Scapes, femora and tibiae with abundant depressed short pubescence, without erect hairs. Body black. femora and tarsi brownish red, tibiae blackish brown. Hairs light yellow.

Paratypes. TL 4.8-5.8, HL 1.40-1.70, HW 1.40- 1.75, CI 100-103, SL 1.65-1.95, SI 111-120, PW 1.00-1.35, AL 1.75-2.15, ED 0.45-0.50, MTL 1.95-2.35 (5 measured). As holotype, but in some individuals with tibiae black, or mesonotum without erect hairs.

Queen

Paratype dealate. TL 6.3, HL 1.70, HW 1.75, CI 103, SL 2.00, SI 114, PW 1.65, AL 2.60, ED 0.50, MTL 2.55 (1 measured). As holotype, but with body larger, head with 3 ocelli, petiolar node with shorter median teeth, about as long as lateral ones.

Type Material

The type specimens are deposited in the Insect Collections, Faculty of Resources. Southwest Forestry College. Kunming. Yunnan Province, China.

Holotype: worker, No. A98-59, 1270 m, Songshanling. Puwen Town, Jinghong County, Yunnan Province, III.4.1998, collected by Mr. He Yun-Feng in warm pine forest. Paratypes: 28 workers, with same data as holotype; 1 dealate female, with same data as holotype but No. A98-5I.

References

  • Xu, Z.-H. 2002b. A systematic study on the ant subgenus Cyrtomyrma Forel of the genus Polyrhachis Smith of China (Hymenoptera: Formicidae). Acta Entomol. Sin. 45: 522-530 (page 526, figs. 26-29 worker, queen described)