Nesomyrmex brunneus

AntWiki: The Ants --- Online
Nesomyrmex brunneus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Nesomyrmex
Species group: brevicornis
Species: N. brunneus
Binomial name
Nesomyrmex brunneus
Csösz & Fisher, 2016

Nesomyrmex brunneus casent0008660 p 1 high.jpg

Nesomyrmex brunneus casent0008660 d 1 high.jpg

Specimen Labels

This species occurs predominantly in rainforests of northern Madagascar from 25–800 m. The only southern population is reported from a rain forest of Isalo National Park. The known samples are collected from canopy: canopy moss and leaf litter or rotten pockets of live branches. (Csösz & Fisher 2016)

Identification

A member of the brevicornis species-group.

Keys including this Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: -12.46889° to -22.48333°.

 
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Malagasy Region: Madagascar (type locality).

Distribution based on AntMaps

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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.
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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.
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Biology

Castes

Worker

Images from AntWeb

Nesomyrmex brunneus casent0919844 h 1 high.jpgNesomyrmex brunneus casent0919844 p 1 high.jpgNesomyrmex brunneus casent0919844 d 1 high.jpgNesomyrmex brunneus casent0919844 l 1 high.jpg
Holotype of Nesomyrmex brunneusWorker. Specimen code casent0919844. Photographer Michele Esposito, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.
Nesomyrmex brunneus casent0082404 h 1 high.jpgNesomyrmex brunneus casent0082404 p 1 high.jpgNesomyrmex brunneus casent0082404 d 1 high.jpgNesomyrmex brunneus casent0082404 l 1 high.jpg
Worker. Specimen code casent0082404. Photographer Erin Prado, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.
Nesomyrmex brunneus casent0107525 h 1 high.jpgNesomyrmex brunneus casent0107525 p 1 high.jpgNesomyrmex brunneus casent0107525 d 1 high.jpgNesomyrmex brunneus casent0107525 l 1 high.jpg
Worker. Specimen code casent0107525. Photographer Erin Prado, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.
Nesomyrmex brunneus casent0418242 h 1 high.jpgNesomyrmex brunneus casent0418242 p 1 high.jpgNesomyrmex brunneus casent0418242 d 1 high.jpgNesomyrmex brunneus casent0418242 l 1 high.jpg
Worker. Specimen code casent0418242. Photographer Erin Prado, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.
Nesomyrmex brunneus casent0428256 h 1 high.jpgNesomyrmex brunneus casent0428256 p 1 high.jpgNesomyrmex brunneus casent0428256 d 1 high.jpgNesomyrmex brunneus casent0428256 l 1 high.jpg
Worker. Specimen code casent0428256. Photographer Erin Prado, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.
Nesomyrmex brunneus casent0488569 h 1 high.jpgNesomyrmex brunneus casent0488569 p 1 high.jpgNesomyrmex brunneus casent0488569 d 1 high.jpgNesomyrmex brunneus casent0488569 l 1 high.jpg
Worker. Specimen code casent0488569. Photographer Erin Prado, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.
Nesomyrmex brunneus casent0418241 h 1 high.jpgNesomyrmex brunneus casent0418241 p 1 high.jpgNesomyrmex brunneus casent0418241 d 1 high.jpgNesomyrmex brunneus casent0418241 d 2 high.jpgNesomyrmex brunneus casent0418241 l 1 high.jpg
Worker. Specimen code casent0418241. Photographer Erin Prado, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.

Nomenclature

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

  • brunneus. Nesomyrmex brunneus Csösz & Fisher, 2016: 137, figs 14-17 (w.) MADAGASCAR.

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

Description

Worker

Body color: dark brown; black. Body color pattern: concolorous. Absolute cephalic size: 721 [620, 808]. Cephalic length vs. maximum width of head capsule (CL/CWb): 1.14 [1.09, 1.21]. Postocular distance vs. cephalic length (PoOc/CL): 0.44 [0.39, 0.47]. Postocular sides of cranium contour frontal view orientation: converging posteriorly. Postocular sides of cranium contour frontal view shape: broadly convex. Vertex contour line in frontal view shape: straight. Vertex sculpture: main sculpture absent, ground sculpture absent, smooth and shiny. Setal pits on head dorsum: inconspicuous with obscure demarcation. Gena contour line in frontal view shape: convex. Genae contour from anterior view orientation: converging; strongly converging. Gena sculpture: ground sculpture areolate, main sculpture absent. Concentric carinae laterally surrounding antennal foramen: present. Eye length vs. absolute cephalic size (EL/CS): 0.22 [0.20, 0.24]. Frontal carina distance vs. absolute cephalic size (FRS/CS): 0.33 [0.31, 0.35]. Longitudinal carinae on median region of frons count: absent. Smooth median region on frons: present. Antennomere count: 12. Scape length vs. absolute cephalic size (SL/CS): 0.64 [0.60, 0.67]. Median clypeal notch: present. Ground sculpture of submedian area of clypeus: present. Median carina of clypeus: absent. Metanotal depression: present. Dorsal region of mesosoma sculpture: ground sculpture areolate, main sculpture absent. Lateral region of pronotum sculpture: ground sculpture areolate, main sculpture absent. Mesopleuron sculpture: ground sculpture areolate, main sculpture absent. Metapleuron sculpture: ground sculpture areolate, main sculpture absent. Petiole width vs. absolute cephalic size (PEW/CS): 0.20 [0.19, 0.22]. Dorsal region of petiole sculpture: ground sculpture areolate, main sculpture absent. Postpetiole width vs. absolute cephalic size (PPW/ CS): 0.26 [0.24, 0.29]. Dorsal region of postpetiole sculpture: ground sculpture areolate, main sculpture absent. Surface of first gastral tergite: continuously imbricate.

Type Material

Holotype: CASENT0919844, collection code: ANTC1302, P.N. Masoala, 40 km 154° SSE Maroantsetra, -15.72667°, 49.95667°, alt 150 m, A. Dejean et al., 10.14.2001 (1w, California Academy of Sciences, CASENT0919844); Paratypes: eight workers and two gynes from the same locality under CASENT codes: CASENT0004957, collection code: ANTC1302, (2w, CASC); CASENT0004958, collection code: ANTC1302, (1Q, CASC); CASENT0004959, collection code: ANTC1302, (1Q, CASC); CASENT0008660, collection code: ANTC1302, (2w, CASC, CASENT0008660); CASENT0008661, collection code: ANTC1302, (2w, CASC); CASENT0008662, collection code: ANTC1302, (2w, CASC);

Etymology

This name (brunneus) refers to the concolorous dark brown appearance of the workers of this species.

References