Research Article |
Corresponding author: Cornelis van Achterberg ( kees@vanachterberg.org ) Academic editor: Jose Fernandez-Triana
© 2018 Cornelis van Achterberg, Jiang-Li Tan.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
van Achterberg C, Tan J-L (2018) Revision of the enigmatic genus Gastralysia Fischer (Hymenoptera, Braconidae, Alysiinae). Journal of Hymenoptera Research 65: 149-156. https://doi.org/10.3897/jhr.65.27622
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The enigmatic genus Gastralysia Fischer, 1967 (Hymenoptera: Braconidae: Alysiinae) and its type species, G. garambana Fischer, 1967, are redescribed and illustrated. The female is described for the first time. The position of the genus is discussed and the genus is placed in a new subtribus, Gastralysiinasubtrib. n. The genus is reported new for Ivory Coast and Tanzania.
Braconidae , Alysiinae , Gastralysia , redescription, Afrotropical, Zaire, Ivory Coast, Tanzania
Gastralysia Fischer, 1967, is an Afrotropical genus belonging to the large subfamily Alysiinae (Hymenoptera, Braconidae), with 2,442 valid species in 107 genera up to 2015 according to
The redescribed specimen was collected in a Malaise trap and preserved in 70% alcohol. For identification of the subfamily Alysiinae, see
Gastralysia Fischer, 1967: 110, 134. Type species (by monotypy): Gastralysia garambana Fischer, 1967 [lost?].
Antenna with 39–41 segments and third segment (including annellus) 0.9 × as long as fourth segment; epistomal sulcus crenulate (Fig.
Unknown.
Afrotropical (Zaire, Ivory Coast, Tanzania). One species.
Gastralysia Fischer, 1967: 110, 134–137. Type species (by monotypy): Gastralysia garambana Fischer, 1967 [lost?].
Holotype ♂ from Zaire should be in Brussels (in the collection of the “Institut des Parcs Nationaux [de Congo belge]” now housed in the Koninklijk Belgisch Instituut voor Natuurwetenschappen) but could not be found. Repeated searches for the holotype and the three ♂ paratypes in the collections in Tervuren, Paris, Vienna, London and Genève were also in vain. The type series was collected in a ruderal savannah near the campsite on Sorghum leaves by hand net during the exploration of the Garamba National Park by H. de Saeger in 1949–1952 (
1 ♀ (
See generic diagnosis.
Female from Ivory Coast, length of body 1.9 mm and of fore wing 2.2 mm.
Head. Head strongly transverse, width 2.3 times median length in dorsal view and temple directly narrowed behind eyes (Fig.
Mesosoma. Mesosoma 1.1 times longer than high; pronope absent; propleuron flattened and subapically with crenulated crest (Fig.
Wings. Fore wing: Pterostigma elliptical; vein r issued medially from pterostigma (Fig.
Legs. Hind coxa smooth; tarsal claws medium-sized (Fig.
Metasoma. Length of first metasomal tergite 0.5 times its apical width, laterally with subhyaline wide lamella (Fig.
Colour. Mainly dark brown (including tegulae); palpi pale yellowish; third-fifth antennal segments yellowish brown; mandible (except dark brown apices), scapus, pedicellus and legs brownish yellow; wing membrane subhyaline; pterostigma and veins brown.
Male. According to the original description very similar to the illustrated female; fore wing length 2.8 mm, body length 2.0 mm and antenna with 39 segments; hind femur 4.0 times longer than wide; propodeal lamella as long as metanotal lamella (fig. 19 in
Ivory Coast, Tanzania, Zaire.
The specimen from Tanzania is very similar to the female from Ivory Coast. It has 42 antennal segments.
The first author gratefully acknowledges the kindly supplied help of the curators of the entomological collections in Brussels, Budapest, London, Paris, Tervuren and Vienna to locate specimens of Gastralysia garambana. The research of the second author is supported by the National Natural Science Foundation of China (NSFC, grants # 31201732 and 31572300).