Stenamma wumengense

Stenamma wumengense
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Myrmicinae
Tribe:	Stenammini
Genus:	Stenamma
Species:	S. wumengense
Binomial name
	Stenamma wumengense; Liu & Xu, 2011

The only specimen of this species, the holotype worker, was collected while foraging on the ground in broadleaf forest.

Identification

Liu & Xu (2011) - This new species is close to Stenamma owstoni but head and scapes comparatively longer, with CI 79 and SI 1 03; eyes with only 4 ommatidia in the maximum diameter; mesopleura longitudinally rugose, propodeal dorsum retirugose; head and body reddish brown.

Keys including this Species

Key to Oriental and Palearctic Stenamma

Distribution

Yunnan Province, China.

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

Liu, C. et al. 2020. Ants of the Hengduan Mountains, Figure 99, Stenamma wumengense.

Nomenclature

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

wumengense. Stenamma wumengense Liu, X. & Xu, 2011: 742, figs. 4-6 (w.) CHINA (Yunnan).
- Type-material: holotype worker.
- Type-locality: China: Yunnan Prov., Yongshan County, Xisha Town, Xiaoyanfang, 2070 m., 19.vii.2006, no.A06-643 (Z. Xu).
- Type-depository: SFCY.
- Status as species: Bharti, Gul & Sharma, 2012a: 327 (in key); Guénard & Dunn, 2012: 53.
- 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. TL 3.9, HL 0.95, HW 0.75, C l 79, SL 0.78, SI 103, PW 0.55, AL 1.20, ED 0.08, PL 0.50, PH 0.25, PI 50, DPW 0.19, PPL 0.33, PPH 0.24, PPI 73, PPW 0.25.

In full face view, head roughly rectangular, longer than broad. Occipital margin nearly straight, occipital corners roundly prominent, lateral sides weakly convex. Anterior margin of clypeus convex, and concave in the middle.

Mandibles with 2 distinct apical teeth and followed by 6 indistinct denticles. Antennae 12-segmented, scapes surpassed occipital corners by 1/15 of its length, antennal clubs 4-segmented. Eyes located before midpoints of lateral sides of head, with 4 ommatidia in the maximum diameter.

In profile view, promesonotum high, anterior portion roundly convex, middle portion relatively straight, posterior portion steeply sloped. Promesonotal suture absent. Metanotal groove narrow, shallowly depressed. Propodeum distinctly lower than promesonotum, dorsum straight and formed a gentle slope. Propodeal spines very short, acutely toothed, about l/6 length of declivity. Declivity straight, about 3/5 length of dorsum. Propodeal plates short and broad, nearly trapezoid, slightly longer than propodeal spines. Petiole long, length: height: width = 4: 2: 1.5, gradually thickened backwards. Petiolar node bluntly prominent at top, shorter than anterior peduncle, slightly depressed between them, but without distinct boundary line. Ventral face of petiole nearly straight, anteroventral corner bluntly angled. Postpetiolar dorsum roundly convex, length: height: width= 2: 1.5: 1.1, ventral face weakly concave, anteroventral corner extruding and tooth-like.

Mandibles finely longitudinally striate. Head retirugose, but longitudinally rugose before eyes and between frontal carinae. Median portion of clypeus smooth and shining. Dorsum of alitrunk retirugose. Pronotum with a longitudinal central carina. Lateral sides of alitrunk longitudinally rugose, but lateral sides of pronotum finely retirugose. Propodeal declivity smooth, upper portion sparsely transversely rugose. Fore coxae transversely rugose. Petiole and postpet iole with interweaved fine longitudinal rugae and fine punctures. Dorsum of petiolar peduncle with a fine longitudinal central carina. Gaster smooth and shining, basal carinae about 1/3 length of postpetiole.

Head with sparse erect to suberect hairs and dense decumbent pubescence. Alitrunk and petiole with sparse erect to suberect hairs and sparse decumbent pubescence. Postpetiole and gaster with abundant erect to suberect hairs and abundant decumbent pubescence. Dorsa of propodeum and petiolar peduncle without erect hairs. Antennal scapes and hind tibiae with dense decumbent pubescence, but without erect hairs. Head and body reddish brown, appendages and gaster yellowish brown, eyes and masticatory margins of mandibles black.

Type Material

Holotype: worker, CHINA: Yunnan Province, Yongshan County, Xisha Town, Xiaoyanfang, 2070m, forage on the ground in broad leaf forest, 2006. VII. 19, Zheng-Hui XU leg., No. A06-643. (Southwest Forestry University, Kunming, China)

Etymology

The new species is named after the type locality Mt. Wumeng in northeastern Yunnan Province.

References

References based on Global Ant Biodiversity Informatics

Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
Liu X., and Z. H. Xu. 2011. Three New Species of the Ant Genus Stenamma (Hymenoptera: Formicidae) from Himalaya and the Hengduan Mountains With a Revised Key to the Known Species of the Palaearctic and Oriental Regions. Sociobiology 58: 733-748.