Polyrhachis cornihumera

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

Polyrhachis cornihumera P.jpg

Polyrhachis cornihumera D.jpg

The type material was collected from mountain rain forest and bamboo forest.

Identification

Xu (2000) - Close to Polyrhachis levior, but shoulders of pronotum formed a pair of right angles; propodeum with minute teeth; Petiolar node with a pair of long slender lateral spines, without median teeth; body surface densely and finely punctured, relatively dull; legs 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.

  • cornihumera. Polyrhachis (Cyrtomyrma) cornihumera Xu, 2002b: 523, figs. 1-4 (w.) 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 5.9, HL 1.80, HW 1.85, CI 103, SL 1.85, SI 100, PW 1.40, AL 2.00, ED 0.45, MTL 2.45. Paratypes. TL 5.9- 6.1, HL 1.75- 1.85, HW 1.85-1.95, CI 105- 106, SL 1.85 -1.90, SI 97-100, PW 1.40-1.55, AL 1.85- 2.10, ED 0.45-0.50, MTL 2.35-2.55 (2 measured).

Head slightly broader than long, roughly triangular, narrowed forward. Occipital margin weakly convex. occipital corners rounded. Lateral sides of head evenly convex. Mandible with 5 teeth. Clypeus evenly convex, without longitudinal central carina, anterior margin with a pair of small denticles and weakly emarginate between the denticles. Antennae long, scape surpassing occipital corner by about 1/2 of its length. Eyes convex, close to occipital corners. In profile view, dorsum of alitrunk strongly convex. promesonotal suture distinct, metanotal groove absent. Propodeum with a pair of small teeth, dorsum and declivity relatively straight. In dorsal view, shoulders of pronotum form a pair of right angles. In front view petiolar node with a pair of long slender lateral spines, laterodorsally pointed and slightly curved inward, without median teeth, dorsal margin of the node straight. In profile view. petiolar node nearly triangular, lateral spines bent backward. Mandibles sparsely and finely punctured. Head, alitrunk and petiole densely and finely punctured, relatively dull. Gaster with weak micro-reticulation. less shiny. The whole body with abundant depressed short pubescence. Anterior part of head with sparse suberect hairs, apex of gaster with abundant suberect hairs. Occiput, alitrunk and dorsum of first gastral segment without hairs. Scapes with dense depressed short pubescence, without hairs . Femora and tibiae with abundant depressed pubescence. without hairs. Body black. with blue metallic luster, eyes blackish brown, legs black. Hairs grayish white.

Type Material

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

Holotype: worker, No. A97-112, 1100 m, Sanchahe River, Mengyang Town, Jinghong County, Yunnan Province. III.1.1997, collected by Miss Dai Se-Ping in mountain rain forest. Paratypes: 1 worker. No. A97-1005, 880 m. Sanchabe River. Mengyang Town. Jinghong County. Yunnan Province. 1997-VIII-8, collected by Dr. Xu Zheng-Hui in bamboo forest; 1 worker, with same data as No. A97-1005, but No. A98-136, III.6.1998, with gaster lost.

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 523, figs. 1-4 worker described)