Perissomyrmex fissus

Perissomyrmex fissus
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Myrmicinae
Tribe:	Crematogastrini
Genus:	Perissomyrmex
Species:	P. fissus
Binomial name
	Perissomyrmex fissus; Xu, Z. & Wang, W.-H., 2004

The type material was collected from a ground sample in the primary sub-alpine moist evergreen broadleaf forest.

Identification

Xu & Wang (2004) - This new species is close to Perissomyrmex monticola, but central notch of clypeus quite deep, its depth about 2/5 of clypeus length. Anterolateral border of clypeus with 2 denticles. In profile view, mesonotum angularly prominent at posterior 1/3. Dorsum of propodeum straight. Gaster black.

Keys including this Species

Key to Perissomyrmex

Distribution

Distribution based on Regional Taxon Lists

Palaearctic Region: China (type locality).

Distribution based on AntMaps

Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.

Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

fissus. Perissomyrmex fissus Xu & Wang, 2004: 218, figs. 7-10 (w.) CHINA (Yunnan).
- Type-material: holotype worker.
- Type-locality: China: Yunnan Prov., Xinping County, Gasa Town, Jinshan Pass, Ailao Mt Nature Reserve, 2500 m., 15.iii.2003, no. A2826 (Z. Xu).
- Type-depository: SFCY.
- Status as species: Zhou & Huang, 2006: 194 (in key); Guénard & Dunn, 2012: 49; Xu & Zhang, 2012: 148 (in key).
- Distribution: 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 worker. TL 3.1, HL 0.83, HW 0.80, CI 97, SL 0.73, SI 91, EL 0.10, PW 0.50, AL 0.88, PL 0.33, PH 0.26, DPW 0.15, PPL 0.23, PPH 0.28, PPW 0.21, PI 46, PPI 94. Head nearly square, about as broad as long, widened forward. In full face view, occipital margin slightly concave, occipital corners rounded, lateral sides weakly convex. Mandible rectangular, inner margin with one tooth in the middle, masticatory margin with 3 teeth and a diastema, arranged as apical tooth, preapical tooth, diastema and basal tooth. Central notch of anterior margin of clypeus deep and U-shaped, its depth about 2/5 of clypeus length. Lateral sides of the central notch formed a pair of acute teeth. Anterolateral border of clypeus with two denticles. Frontal carinae absent, antennal sockets completely exposed. Antenna 9-segmented, scape surpassed occipital corner by 1/5 of its length, antennal club consisted of 3 apical segments. Eyes relatively smaller and prominent outside the lateral sides of head, with 6 ommatidia along the maximum diameter. In profile view, pronotum weakly convex. Promesonotal suture absent. Mesonotum sloped backward and angularly prominent at posterior 1/3. Metanotal groove depressed. Propodeal spines strong and acute, dorsum of propodeum straight. Propodeal lobes small and angularly prominent at apices. In profile view, petiole without subpetiolar process. Petiolar node relatively high and thin, weakly narrowed upward, dorsum moderately convex, anterodorsal corner higher than posterodorsal corner. Anteroventral corner of postpetiole rightly angled, postpetiolar node inclined posteriorly, as high as petiolar node.

Apical 1/4 of mandible smooth and shining, basal 3/4 finely longitudinally striate. Clypeus smooth and shining. Head and alitrunk sparsely coarsely and longitudinally striate. Lateral sides of mesothorax, metathorax and propodeum smooth and shining, with very sparse longitudinal striations. Dorsum of propodeum smooth. Lower portions of petiole and postpetiole finely reticulate, petiolar node and postpetiolar node smooth and shining. Gaster smooth and shining. Dorsal surfaces of head and body with abundant erect or suberect long hairs and subdecumbent short hairs. Scapes and tibiae with abundant subdecumbent long hairs and decumbent short hairs. Head, mandibles, antennae and alitrunk brown. Legs, petiole and postpetiole yellowish brown. Gaster black, anterior face and apex blackish brown.

Type Material

Holotype: worker, No. A2826, 2500 m, Ailao Mountain Nature Reserve, Jinshan Pass, Gasa Town, Xinping County, Yunnan Province, 15-Ⅲ-2003, collected by Mr. Xu Zheng-hui in a ground sample in the primary sub-alpine moist evergreen broadleaf forest. The type specimen is deposited in the Insect Collection, Southwest Forestry College, Kunming, Yunnan Province, P. R. China.

References

References based on Global Ant Biodiversity Informatics

Fontanilla A. M., A. Nakamura, Z. Xu, M. Cao, R. L. Kitching, Y. Tang, and C. J. Burwell. 2019. Taxonomic and functional ant diversity along tropical, subtropical, and subalpine elevational transects in southwest China. Insects 10, 128; doi:10.3390/insects10050128
Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
Xu Z. H., and W. H. Wang. 2004. The third species of the ant genus Perissomyrmex Smith (Hymenoptera: Formicidae) in the world. Entomotaxonomia 26: 217-221.
Xu Z. and W.-H. Wang. 2004. The third species of the ant genus Perissomyrmex Smith (Hymenoptera: Formicidae) in the world. Entomotaxonomia 26(3): 217-221