Nesomyrmex saasveldensis

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Nesomyrmex saasveldensis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Nesomyrmex
Species group: simoni
Species: N. saasveldensis
Binomial name
Nesomyrmex saasveldensis
Mbanyana & Robertson, 2008

Nesomyrmex saasveldensis P.jpg

Nesomyrmex saasveldensis D.jpg

Nothing is known about the biology of Nesomyrmex saasveldensis but the types were probably collected in fynbos. (Mbanyana and Robertson 2008)

Identification

Mbanyana and Robertson (2008) - A member of the simoni species-group. Nesomyrmex saasveldensis looks similar to Nesomyrmex braunsi and Nesomyrmex simoni; in all of them the dorsum of petiolar node is rugo-reticulate. Rugo-reticulate sculpture is usually also evident partially or completely on head and mesosoma. It is recognized from N. braunsi by the uniformly medium to dark brown colour (in N. braunsi mesosoma and nodes are rufous coloured, with a contrasting black head and gaster), smaller size (HW 0.775–0.836 versus 1.033–1.109), and armed propodeum (versus unarmed). N. saasveldensis is distinguished from N. simoni by having hairs on the propodeum.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: South Africa (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.

  • saasveldensis. Nesomyrmex saasveldensis Mbanyana & Robertson, 2008: 52, figs. 2a-c (w.) SOUTH AFRICA.

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

Description

Worker

Holotype. HL 0.967, HW 0.810, HW1 0.895, CI 84, SL 0.674, SI 83, PW 0.639, ML 1.156, EL 0.216, EI 27.

Mandibles with longitudinal striations. Clypeus with strongly developed longitudinal striation laterally and smooth centrally except for median striation, which fades out at about half the length of the clypeus. Anterior clypeal margin convex in dorsal view. Scapes of moderate length (SI 83). Eyes large, with 16 ommatidia in the longest row. Head broad in full face view and the hind margin straight to shallowly convex. Promesonotum in profile convex and metanotal groove conspicuously impressed. Propodeal dorsum convex; declivity 20 degrees from vertical. Propodeum armed with a pair of triangular teeth. Metapleural lobes low and rounded. Anterior peduncle with an elongate triangular subpetiolar process. Petiolar node large and convex in profile. Postpetiole rounded in profile and approximately same length as petiolar node. Dorsum of head with longitudinally rugulae, with cross-meshes in places. Surface between rugulae uneven and shiny with occasional fine irregular rugulae. Promesonotal dorsum rugo-reticulate. Propodeal dorsum with irregular rugulae and declivity with transverse rugulae. Petiolar node and postpetiole rugoreticulate. Base of first gastral tergite with costulae and the remainder finely reticulate. All dorsal surfaces with scattered erect hairs, some of which are expanded and jaggered apically. The venter of head with nine straight hairs and two curved hairs. The gastral sternite with regularly spaced suberect fine hairs. Colour uniformly medium brown.

Paratypes. HL 0.919–1.006, HW 0.775–0.836, HW1 0.836–0.911, CI 82–89, SL 0.701–0.767, SI 85–94, PW 0.639–0.688, ML 1.163–1.266, EL 0.231–0.278, EI 28–35 (6 of 14 measured).

Same as holotype except the following differences: Mesosoma and nodes either with short blunt hairs or with long fine acute hairs; pubescence present. The venter of head with 6–10 straight hairs and 2–5 curved hairs. Colour medium to dark brown.

Type Material

Holotype: South Africa: Western Cape: Saasveld, [33°57’S 22°32’E], March 1994, E. Breytenbach, Field # = WB238F, SAM-HYM-C007260. Paratypes: South Africa: Western Cape: Saasveld, [33°57’S 22°32’E], March 1994, E. Breytenbach, Field # WB238F, SAM-HYM-C007259; Saasveld, [33°57’S 22°32’E], March 1994, E. Breytenbach, Field # WB42M, SAM-HYMC007261; Saasveld, [33°57’S 22°32’E], March 1994, E. Breytenbach, Field # WB147M, SAM-HYM-C007262; Saasveld, [33°57’S 22°32E], March 1994, E. Breytenbach, Field # WB227F, SAM-HYM-C007263; Saasveld, [33°57’S 22°32’E], March 1994, E. Breytenbach, Field # WB238F, SAM-HYM-C007264.

Etymology

So named because the holotype and the paratypes were collected from Saasveld near George.

References