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Key to species of Afrotropical Tetractenion

(Life: Kingdom: Metazoa (animals); Phylum: Arthropoda; Class: Hexapoda; Order: Hymenoptera;  Superfamily: Ichneumonoidea; Family: Ichneumonidae; Subfamily: Banchinae;  Genus: Tetractenion)

ClassificationIdentification keys


1. Metasomal tergite 1 distinctly dorso-medially compressed, tergites 4-8 white where weakly sclerotized (A); keels distinctly raised on mesoscutal lobes (B); notauli abbreviated, not reaching the scutellum ...Tetractenion acaule

 

- Metasomal tergite 1 with dorso-medial compression weak or absent, tergites 4-8 strongly sclerotized (a); keels only slightly raised on mesoscutal lobes (b); notauli present, posteriorly meeting before reaching the scutellum (b) ...2

 


2. Metasomal tergite 1 stout, about as long as wide in dorsal view (A); pits on the mesopleuron and propodeum are large and deep (B) Tetractenion ibayaensis

 

- Metasomal tergite 1 elongate, about twice as long as wide in dorsal view (a); pits on the mesopleuron and propodeum shallow (b) ...3

 


3. Hind tarsal claw simple (A); wings with dense microtrichia, venation dark (B) ...Tetractenion luteum

 

- Hind tarsal claw pectinate (a); wings usually with sparser microtrichia, venation usually yellowish-brown (b) ...4

 


4.ML 0.6 (A); head yellow, congruent with yellow body (B) ...Tetractenion pseudolutea

 

- ML 0.7-0.9 (a); head dark purplish-brown or reddish-brown, contrasting with yellow body (b) ...5

 


5. Pronotal collar with strong carina present (A); head reddish-brown and less robust, face weakly three lobed (B) ...Tetractenion rosei

 

- Pronotal collar weakly wrinkled (a); head dark purplish-brown and more robust, face strongly three-lobed ...Tetractenion pascali


Reference

Reynolds Berry T, van Noort S. 2020. Revision of the endemic Afrotropical genus Tetractenion (Hymenoptera, Ichneumonidae) with an identification key to genera of Banchinae for the region. ZooKeys 1007: 49-84. https://doi.org/10.3897/zookeys.1007.55543

Credits

Photographs by Terry Reynolds Berry (Iziko Museums of South Africa).


Web author Simon van Noort (Iziko South African Museum)

 

Citation: van Noort, S. 2023. WaspWeb: Hymenoptera of the Afrotropical region. URL: www.waspweb.org (accessed on <day/month/year>).

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