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Key to Chalinus species

(Life: Kingdom: Metazoa (animals); Phylum: Arthropoda; Class: Hexapoda; Order: Hymenoptera;  Superfamily: Orussoidea; Family: Orussidae; Genus:  Chalinus)

ClassificationIdentification keys

1. Abdomen from segment 3 reddish-brown (a). Frons with prominent trapezoid fringe of golden pilosity (male unknown) (b) Chalinus davidi

 

- Abdomen from segment 3 metallic green or blue  (A). Frons usually with scattered hairs, but not with prominent fringe of pilosity (B) 2

 

2. First antennomere short, cylindrical, straight (a); remaining antennomeres mostly flat and constricted basally in both sexes (a); female antennae without stout hairs (a). Hind femur with denticles ventrally (b). Female tergum 8 with well-developed projection medially on hind margin (c) 3

 

- First antennomere elongate, flattened, curved (A); remaining antennomeres not flattened in females, and not constricted basally (A); female antenna with stout hairs (A). Hind femur without denticles ventrally (B). Without distinct projection on female tergum 8 (C) 4

 

3. Dense tuft of hair on thorax just below tegula  (a). Fore wing with hyaline area proximally of discal cell (b), in addition to small hyaline spot distally (b) Chalinus berlandi

 

- Without distinct hair patch below tegula (A). Fore wing infuscate proximally of discal cell, with single small hyaline spot distally (male unknown) (B)  Chalinus haugi

 

4. Hind tibia with creamy white patch extending for most of its length (a) Chalinus albitibialis

 

- Hind tibia bluish-green metallic or brown, without extensive white patch (A) 5

 

5. Antennomere 1 not expanded proximally, triangular in outline or cylindrical, with ventral carina not developed for entire length, or absent (a). Fore wing with large hyaline areas (b). Tergum 2 with smooth dark anterolateral areas separated from antecosta by less than 0.25 of length of area (c) 6

 

- Antennomere 1 expanded proximally, rectangular in outline, with ventral carina developed along the entire length (A), especially prominent in male. Fore wing at most with narrow hyaline band distally of pterostigma, and along distal part of posterior margin (B). Tergum 2 with smooth dark anterolateral areas separated from antecosta by at least 0.50 length of area (C) 7

 

6. Antennomere 1 of subequal width throughout, with anteroventral projection at most weakly developed (a, b) Chalinus timnaensis

 

- First antennomere triangular in outline, anteroventral projection distinct, most prominent in males (A) Chalinus plumicornis

 

7. Tergum 1 with scattered pits, tergum 2 predominantly smooth anteriorly (a) Chalinus imperialis

 

- Tergum 1 densely punctured, tergum 2 densely sculptured anteriorly (female unknown) (A)  Chalinus purpureiventris

 

References

Vilhelmsen L. 2003. Phylogeny and classification of the Orussidae (Insecta: Hymenoptera), a basal parasitic wasp taxon. Zoological Journal of the Linnean Society 139: 337-418.

Vilhelmsen L, Blank SM, Sechi D & van Noort S. The Orussidae (Insecta: Hymenoptera) of Africa.

Credits

Photographs Simon van Noort (Iziko Museums of South Africa) or photographs Lars Vilhelmsen (Natural History Museum of Denmark, Copenhagen) or photographs Stephen M. Blank (Senckenberg Deutsches Entomologisches Institut).


Web author Simon van Noort (Iziko South African Museum)

 

Citation: van Noort, S. 2018. WaspWeb: Hymenoptera of the Afrotropical region. URL: www.waspweb.org (accessed on <day/month/year>).

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