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Cremastus Gravenhorst

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

Cremastus Gravenhorst 1829. Type species: Belesica spectator Gravenhorst 1829.

 

Cremastus geminus Gravenhorst, 1829

Cremastus madagascariensis Enderlein, 1921
Cremastus tutui Rousse & van Noort, 2014

Distribution

Madagascar, South Africa. Also Holarctic & Neotropical regions.

Biology

Usually parasitoids of coleopteran stem borers or gall makers (Buprestidae, Cerambycidae, Coleophoridae, Mordellidae), but  also attack lepidopteran (Gelechiidae, Noctuidae, Pieridae, Pyralidae, Scythridae) and dipteran larvae (Tephritidae).

Diagnosis

Body slender. Occipital carina dorsally incomplete, the free upper ends down curved. Scutellum weakly to moderately convex, often with a weak lateral carina. Propodeum completely areolated or nearly so. First radial cell short. Areolet absent. Vein Rs&M opposite or slightly basal to vein cu-a, vein rs-m opposite to basal to 2m-cu by 0.5 its length. Hind wing with vein Cu + cu-a usually broken, vein Cu1 spectral to absent. Tergite I with long and shallow glymma, its lower edges separated and parallel, rarely almost touching. Thyridium absent. Epipleurum of tergite II narrow, separated by a crease, turned under. Apex of male gonosquama with a long ventral asymmetric lobe, this separated by a concave area from a dorsal tooth or short lobe near base. Ovipositor tip straight, decurved, or weakly sinuate (Rousse etal., 2011).

References

Gravenhorst, J.L.C. 1829. Ichneumonologia Europaea. Pars III. Vratislaviae. 1097 pp. 

Rousse, P., Villemant, C. & Seyrig, A. 2011. Ichneumonid wasps from Madagascar. 5. Ichneumonidae Cremastinae. Zootaxa, 3118, 1-30.

Rousse P & van Noort S. 2014. Belesica madiba and Cremastus tutui (Ichneumonidae: Cremastinae), two entomological gems from South Africa. Zootaxa 3795: 161–173. http://dx.doi.org/10.11646/zootaxa.3795.2.5

Credits

Photographs by Agničle Touret-Alby © MNHN (specimens database http://coldb.mnhn.fr) or photographs by Pascal Rousse © Iziko Museums of South Africa. Map illustration © Simon van Noort (Iziko Museums of South Africa).

 

Next genus: Eucremastus


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>).

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