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Species: Nesomyrmex ezantsi   Mbanyana & Robertson, 2008 

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Taxonomic History (provided by Barry Bolton, 2019)

Nesomyrmex ezantsi Mbanyana & Robertson, 2008 PDF: 43, figs. 4m-o (w.) SOUTH AFRICA. Afrotropic. AntCat AntWiki HOL


  Geographic regions (According to curated Geolocale/Taxon lists):
    Africa: South Africa
  Biogeographic regions (According to curated Bioregion/Taxon lists):

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Mbanyana, N. & Robertson, H. G., 2008, Review of the ant genus Nesomyrmex (Hymenoptera: Formicidae: Myrmicinae) in southern Africa., African Natural History 4, pp. 35-55

Nesomyrmex ezantsiHNS sp. nov.

Fig. 4m -o

Description of worker

Holotype. HL 0.755, HW 0.598, HW1 0.659, CI 79, SL 0.569, SI 95, PW 0.423, ML 0.875, EL 0.226, EI 38.

Mandibles with fine longitudinal striations. Clypeus predominantly smooth, with a striation medially and borderedby longitudinal striations. Anterior clypeal margin convex. Scapes of moderate length (SI 90). Eyes with 14 ommatidia in the longest row. Promesonotum in profile evenly convex and metanotal groove conspicuously impressed. Propodeum armed with a pair short triangular teeth.

Fig. 3. Nesomyrmexspecies from southern Africa in profile (left column), in dorsal view (central column) and showing dorsum of head (right column). a -c, N. ruaniHNS; d -f, N. entabeniHNS; g -i, N. nanniaeHNS; j -l, N. vannoortiHNS; m -o, N. njengelangaHNS.

Fig. 4. Nesomyrmexspecies from southern Africa in profile (left column), in dorsal view (central column) and showing dorsum of head (right column). a -c, N. tshiguvhoaeHNS; d -f, N. karooensisHNS; g -i, N. cederbergensisHNS (head glued back on body); j -l, N. inyeHNS; m -o, N. ezantsiHNS.

Metapleural lobes low and rounded. Anterior peduncle short and thick, with a tooth-like subpetiolar process. Petiolar node in profile with an angulate anterodorsal angle and a rounded posterodorsal angle; dorsum convex and not clearly defined. Postpetiole low and rounded. Head dorsum with a reticulate pattern and faint striations medially. Promesonotal dorsum with reticulate sculpture and fine longitudinal striations anteriorly. Propodeal dorsum reticulate with a few transverse striations and both nodes also reticulate. First gastral tergite smooth with a ring of short basal costulae. Dorsum of head with four longitudinal lines of fine acute hairs running between the eyes. The venter of head with two curved hairs and three straight hairs; pubescence present. Promesonotal dorsum with at least 10 erect hairs, acute apically. Propodeal dorsum with three erect hairs. Petiolar node with three pairs of hairs and postpetiole with four pairs of hairs. Gastral tergite and sternite with regularly spaced suberect hairs. Colour uniformly yellow.

Paratypes. HL 0.767-0.806, HW 0.598-0.610, HW1 0.664-0.686, CI 76-78, SL 0.561-0.570, SI 94, PW 0.425-0.462, ML 0.875-0.944, EL 0.226-0.236, EI 38-39 (2 of 2 measured).

Same as the holotype, except number of hairs on the propodeum range from three tofour andonthe petiolar node range from three to four.


Nesomyrmex ezantsiHNS is similar in appearance to N. koebergensisHNS, N. njengelangaandN. inyeHNS. They share the following characteristics: petiolar node with rounded posterodorsal angle and anterodorsal angle either angulate or rounded; dorsum convex and not clearly defined. Dorsum of head with reticulate sculpture, sometimes overlaid by longitudinal rugulae. N. ezantsiHNS is separated from N. njengelangaHNS and N. inyeHNS by the propodeum which is armed with a pair of short triangular teeth (angulate in the latter two species with no clearly defined pair of short spines), and by being larger (HW 0.598-0.625 versus 0.507-0.559). N. ezantsiHNS is distinguished from N. koebergensisHNS by the pale colour (light brown in N. koebergensisHNS) and the dorsum of head which is predominantly smooth, with fine reticulate ground sculpture(reticulate and overlaid by longitudinal rugulae in N. koebergensisHNS).


The three specimens were collected from pitfall traps in ‘Lambert 's Bay Strandveld ' (Mucina & Rutherford 2006) vegetation.


In isi-Xhosa, ezantsiHNS means ‘below ' and is used here to refer to the fact that this species was collected on the coastal plain, in low-lying areas.

Material examined

Holotype: South Africa: Western Cape: Lambert 's Bay, Strandveld, 32°10'51"S 18°18'59"E, 07 October 2002, A. Botes, CKOct02-LMB-1.3.10, SAM-HYM-C019383.

Paratypes: South Africa: Western Cape: Lambert 's Bay, Strandveld, 32°10'47"S 18°18'55"E, 07 October 2002, A. Botes, CKOct02-LMB-1.2.10, SAM-HYM-C019384;

Lambert 's Bay, Strandveld, 32°10'51"S 18°18'59"E, CKMar03-LMB-1.3.7, 03 March 2003, A. Botes, SAM-HYM-C019386.

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