Overview

Comprehensive Description

Phrynoponera sveni (Forel) HNS

(Figures 6a-d)

Pachycondyla (Bothroponera) sveni Forel HNS , 1916: 398. Syntype workers, DEMOCRATIC REPUBLIC OF CONGO: no loc. (Kohl) ( MHNG ) [examined]. [Combination in Phrynoponera HNS by Wheeler, W.M. 1922: 80.]

Worker. TL 10.5-11.4, HL 2.20-2.36, HW 2.15-2.26, CI 95-98, SL 1.88-2.00, SI 86-91, PW 1.76-1.88, WL 3.20-3.48, maximum diameter of eye 0.52-0.58, OI 24-27 (7 measured).

Mandible with 4 teeth, smooth with scattered setal pits; some fine striation also may be present. Median portion of anterior clypeal margin shallowly convex to almost flat, lacking a prominent tooth on each side of the midline. Dorsum of head irregularly rugose to reticulate-rugose medially, the rugae sometimes smeared and confluent, chaotic rather than well defined. More laterally on dorsum the sculpture becomes more strongly reticulate-rugose, never with sharply defined costulae that radiate from the midline. Outer pair of petiolar spines very much longer than the median spine; intermediate spines slender and distinctly shorter than the median. Gastral tergites 1 and 2 finely longitudinally costulate on a reticulate-punctate background sculpture. Gastral tergite 3 reticulate-punctate only, or with a few feeble costulae present. Mesosoma, petiole and gaster with patches of cuticle that show dull metallic blue reflections.

All specimens examined had 4 teeth on the mandible, but because other species show some variation in this, individuals with 5 teeth are probably to be expected. Cephalic sculpture is coarse and disorganised. In some specimens the reticulate rugae are quite sharply defined everywhere, the reticulae becoming more broad towards the lateral margins. In others, the rugae near the midline are close-packed and blunted, the reticulae small, and the overall appearance is of coarse but chaotic sculpture. In some other species, blue metallic reflections are frequent on the propodeal declivity and elsewhere, but in sveni HNS they are more widely distributed and appear always to be present. Samples of this species have been collected from rotten logs, in leaf litter samples, in pitfall traps, and from termitaries.

Material examined. Cameroun: Mvini (A. Dejean); Ottotomo (A. Dejean). Gabon: Prov. Ogooue-Maritime, Res. Monts Doudou, NW Doussala (B.L. Fisher). Central African Republic: Res. Dzanga-Sangha, NW Bayanga (B.L. Fisher); Dzanga-Ndoki, Lidjombo (B.L. Fisher). Democratic Republic of Congo: Medje (Lang); no loc. (Kohl); Kongolo (A. Watsham).

  • Bolton, B., Fisher, B. L. (2008): The Afrotropical ponerine ant genus Phrynoponera Wheeler (Hymenoptera: Formicidae). Zootaxa 1892, 35-52: 49-49, URL:http://hol.osu.edu/reference-full.html?id=22424
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Taxonomic History

Pachycondyla (Bothroponera) sveni Forel, 1916 PDF: 398 (w.) DEMOCRATIC REPUBLIC OF CONGO. AntCat AntWiki

Taxonomic history

Combination in Phrynoponera: Wheeler, 1922: 80.
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Phrynoponera sveni (Forel) HNS

Three workers from Medje (Lang and Chapin), agree perfectly with Forel's description. They all show, however, a beautiful blue opalescence, like that of Lobopelta iridescens HNS , on the smooth declivity of the epinotum, the sides of the petiole, and the whole surface of the postpetiole. This may have been overlooked by Forel, as the surfaces of these ants are often covered with a layer of dirt. It was only after my specimens had been thoroughly washed in caustic potash that the blue coloration of the parts above mentioned was revealed. P. sveni HNS is a, strongly marked species, characterized by the long antennae, toothless clypeus, and slender, pointed and upwardly directed epinotal spines (Fig. 13a-c).

Fig, 13. Phrynoponera sveni (Forel) HNS . Worker. a, lateral view of body; b, head from ahove c, Petiole, dorsal view,

  • Wheeler, W. M. (1922): The ants collected by the American Museum Congo Expedition. Bulletin of the American Museum of Natural History 45, 39-269: 80-80, URL:http://plazi.org:8080/dspace/handle/10199/17097
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Physical Description

Diagnostic Description

Taxonomic Treatment

Bolton, B., 2008:
 (Figures 6a-d)
 Pachycondyla (Bothroponera) sveni Forel , 1916: 398. Syntype workers, DEMOCRATIC REPUBLIC OF CONGO: no loc. (Kohl) ( MHNG ) [examined]. [Combination in Phrynoponera by Wheeler, W.M. 1922: 80.]
 Worker. TL 10.5-11.4, HL 2.20-2.36, HW 2.15-2.26, CI 95-98, SL 1.88-2.00, SI 86-91, PW 1.76-1.88, WL 3.20-3.48, maximum diameter of eye 0.52-0.58, OI 24-27 (7 measured).
 Mandible with 4 teeth, smooth with scattered setal pits; some fine striation also may be present. Median portion of anterior clypeal margin shallowly convex to almost flat, lacking a prominent tooth on each side of the midline. Dorsum of head irregularly rugose to reticulate-rugose medially, the rugae sometimes smeared and confluent, chaotic rather than well defined. More laterally on dorsum the sculpture becomes more strongly reticulate-rugose, never with sharply defined costulae that radiate from the midline. Outer pair of petiolar spines very much longer than the median spine; intermediate spines slender and distinctly shorter than the median. Gastral tergites 1 and 2 finely longitudinally costulate on a reticulate-punctate background sculpture. Gastral tergite 3 reticulate-punctate only, or with a few feeble costulae present. Mesosoma, petiole and gaster with patches of cuticle that show dull metallic blue reflections.
  All specimens examined had 4 teeth on the mandible, but because other species show some variation in this, individuals with 5 teeth are probably to be expected. Cephalic sculpture is coarse and disorganised. In some specimens the reticulate rugae are quite sharply defined everywhere, the reticulae becoming more broad towards the lateral margins. In others, the rugae near the midline are close-packed and blunted, the reticulae small, and the overall appearance is of coarse but chaotic sculpture. In some other species, blue metallic reflections are frequent on the propodeal declivity and elsewhere, but in sveni they are more widely distributed and appear always to be present. Samples of this species have been collected from rotten logs, in leaf litter samples, in pitfall traps, and from termitaries.
 Material examined. Cameroun: Mvini (A. Dejean); Ottotomo (A. Dejean). Gabon: Prov. Ogooue-Maritime, Res. Monts Doudou, NW Doussala (B.L. Fisher). Central African Republic: Res. Dzanga-Sangha, NW Bayanga (B.L. Fisher); Dzanga-Ndoki, Lidjombo (B.L. Fisher). Democratic Republic of Congo: Medje (Lang); no loc. (Kohl); Kongolo (A. Watsham).
 

Wheeler, W. M., 1922:
  Fig, 13. Phrynoponera sveni (Forel) . Worker. a, lateral view of body; b, head from ahove c, Petiole, dorsal view,
 
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Fig, 13. Phrynoponera sveni (Forel) . Worker. a, lateral view of body; b, head from ahove c, Petiole, dorsal view,

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(Figures 6a-d)

 

Pachycondyla (Bothroponera) sveni Forel , 1916: 398. Syntype workers, DEMOCRATIC REPUBLIC OF CONGO: no loc. (Kohl) ( MHNG ) [examined]. [Combination in Phrynoponera by Wheeler, W.M. 1922: 80.]

 

Worker. TL 10.5-11.4, HL 2.20-2.36, HW 2.15-2.26, CI 95-98, SL 1.88-2.00, SI 86-91, PW 1.76-1.88, WL 3.20-3.48, maximum diameter of eye 0.52-0.58, OI 24-27 (7 measured).

 

Mandible with 4 teeth, smooth with scattered setal pits; some fine striation also may be present. Median portion of anterior clypeal margin shallowly convex to almost flat, lacking a prominent tooth on each side of the midline. Dorsum of head irregularly rugose to reticulate-rugose medially, the rugae sometimes smeared and confluent, chaotic rather than well defined. More laterally on dorsum the sculpture becomes more strongly reticulate-rugose, never with sharply defined costulae that radiate from the midline. Outer pair of petiolar spines very much longer than the median spine; intermediate spines slender and distinctly shorter than the median. Gastral tergites 1 and 2 finely longitudinally costulate on a reticulate-punctate background sculpture. Gastral tergite 3 reticulate-punctate only, or with a few feeble costulae present. Mesosoma, petiole and gaster with patches of cuticle that show dull metallic blue reflections.

 

All specimens examined had 4 teeth on the mandible, but because other species show some variation in this, individuals with 5 teeth are probably to be expected. Cephalic sculpture is coarse and disorganised. In some specimens the reticulate rugae are quite sharply defined everywhere, the reticulae becoming more broad towards the lateral margins. In others, the rugae near the midline are close-packed and blunted, the reticulae small, and the overall appearance is of coarse but chaotic sculpture. In some other species, blue metallic reflections are frequent on the propodeal declivity and elsewhere, but in sveni they are more widely distributed and appear always to be present. Samples of this species have been collected from rotten logs, in leaf litter samples, in pitfall traps, and from termitaries.

 

Material examined. Cameroun: Mvini (A. Dejean); Ottotomo (A. Dejean). Gabon: Prov. Ogooue-Maritime, Res. Monts Doudou, NW Doussala (B.L. Fisher). Central African Republic: Res. Dzanga-Sangha, NW Bayanga (B.L. Fisher); Dzanga-Ndoki, Lidjombo (B.L. Fisher). Democratic Republic of Congo: Medje (Lang); no loc. (Kohl); Kongolo (A. Watsham).

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Bolton, B.

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