HomeWasp classificationExpeditionsLinksFigWebBiodiversity ExplorerPermits

Key to species of Chaenusa (Alysiinae)

(Life: Kingdom: Metazoa (animals); Phylum: Arthropoda; Class: Hexapoda; Order: Hymenoptera;  Superfamily: Ichneumonoidea; Family: Braconidae; Subfamily: Alysiinae; Genus: Chaenusa)

ClassificationAlysiinae keys


1. Vein 2-1A of forewing completely developed, resulting in a closed first subdiscal cell (A); vein 1-SR+M of forewing absent or, when present, largely unsclerotised (A); apical half of metasoma of female largely depressed (B); body black; face strongly narrowed in females, ventrally narrower than high (C) (subgenus Chaenusa Haliday, 1839) ...2

 

- Vein 2-1A of forewing largely absent, resulting in an open first subdiscal cell (a); vein 1-SR+M of forewing sclerotised, complete (a); apical half of metasoma of female strongly compressed; body largely reddish-brown; female face slightly wider than high (subgenus Chorebidea Viereck, 1914)... Chaenusa testacea

 


2. Frons (fr) and face polished (A); face and eyes (ep) sparsely pubescent (A); each scutellar fovea (sf) with 2 or 3 longitudinal septa (A); first tergite (1t) longer than posteriorly wide, laterally strigous, medially rugulose (B); vein 1-SR+M of forewing pigmented, but largely unsclerotised (C); distal end of pterostigma (pt) comparatively elongate (C) ...Chaenusa seminervata

 

- Frons (fr) and face granulate (a); face and eyes (ep) densely pubescent (a); each scutellar fovea (sf) with no obvious longitudinal septa (a); first tergite (1t) as long as posteriorly wide, overall rugulose without longitudinal strigae (b); vein 1-SR+M of forewing absent (c); distal end of pterostigma (pt) comparatively shorter and more robust (c)... Chaenusa anervata


References

van Noort S, Smith R, Coetzee JA. 2021. Identity of parasitoid wasps (Hymenoptera: Braconidae and Eulophidae) reared from aquatic leaf-mining flies (Diptera: Ephydridae) on invasive Brazilian waterweed Egeria densa in South Africa. African Invertebrates 62: 287314. https://doi.org/10.3897/afrinvertebr.62.62842

Credits

Keys developed by Simon van Noort. Photographs included in the key Simon van Noort (Iziko Museums of South Africa).


Web author Simon van Noort (Iziko South African Museum)

 

Citation: van Noort, S. 2021. WaspWeb: Hymenoptera of the Afrotropical region. URL: www.waspweb.org (accessed on <day/month/year>).

Copyright 2004-2021 Iziko Museums of South Africa

customisable counter