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Anacharoides striaticeps Cameron

(Life: Kingdom: Metazoa (animals); Phylum: Arthropoda; Class: Hexapoda; Order: Hymenoptera; Superfamily: Cynipoidea; Family: Figitidae; Subfamily: Aspicerinae; Genus: Anacharoides)

Anacharoides striaticeps Cameron, 1904. Holotype: Africa Museum, Tervuren (RMCA) Type locality: Haut-Ule (Democratic Republic of Congo).

Anacharoides arcus Quinlan, 1979

Anacharoides decellius Quinlan, 1979

Anacharoides elongaticornis Benoit, 1956 Holotype: Africa Museum, Tervuren (MRAC) Type locality: Haut-Ule (Democratic Republic of Congo).

Anacharoides eurytergis Benoit, 1956

Anacharoides nigra Quinlan, 1979

Anacharoides sanitas Quinlan, 1979

Anacharoides suspensus Quinlan, 1979

 

Distribution

Democratic Republic of Congo.

Biology

Two specimens from SANCI are associated with isolated host puparia that were identified by F.C. Thompson (Smithsonian Institution) as belonging to Ischiodon aegyptius (Weidemann). Label data on another specimen, collected in Uganda and deposited in the BMNH, reads “parasite on syrphid larval predator of psyllid”; another specimen in the BMNH collected in Uganda has label data recording the host as “Ischiodon sp.”; these specimens lack host remains. A third specimen, collected in Senegal and deposited in the BMNH, reads “ex Ischiodon aegypticum”; this specimen lacks host remains.

Diagnosis

This species closely resembles A. nicknacki, but can be differentiated from that species by the lack of well-developed antero-admedial signum struts (distinctly larger than surrounding rugae in A. nicknacki); distinct from A. pallida by the presence of rugae over the entire mesoscutum (shagreened in A. pallida); distinct from A. quadrus and A. paragi by the lack of additional antero-admedial signum struts (at least 2 in both A. paragi and A. quadrus); distinct from A. stygius by the lack of horizontal strigae on the mesoscutum.

Quinlan (1979) described six species that, in the present work, are considered synonyms of A. striaticeps. As with A. pallida, the morphology of this species is particularly difficult to interpret if insufficient lighting is used. Two key character systems employed by Quinlan (1979) are the sculpture of the mesoscutum and the shape of the scutellar acetabulum (referred to as the ‘apical depression of the scutellum’). In the case of the mesoscutal morphology, directional and non-directional light will reveal very different character states on the same specimen; careful examination of the mesoscutum of Quinlan’s (1979) holotypes revealed that several species described in that work were merely representing the morphological variation within A. striaticeps. A similar situation occurs with the scutellar acetabulum: the shape of the anterior and posterior margins of this structure vary from distinctly round to nearly straight, in the same specimen, solely dependent upon examination angle. In the preparation of the present study, this character was originally employed only to be excluded upon the discovery of this artifact.

References

Benoit, P.L.G. 1956. Figitidae - Aspicerinae nouveaux du Congo Belge. Revue Zool. Bot. afr. 53: 195-204.

Buffington, M.L. & van Noort, S. 2009. A world revision of Anacharoides Cameron, 1904 (Hymenoptera: Figitidae) with a description of a new species. Zookeys 20: 245-274.

Quinlan, J. 1979. A revisionary classification of the Cynipoidea (Hymenoptera) of the Ethiopian Zoogeographical Region. Aspicerinae (Figitidae) and Oberthuerellinae (Liopteridae). Bulletin of the British Museum of Natural History (Entomology) 39: 85-133.

Credits

Photographs by Matt Buffington (Systematic Entomology Laboratory, USDA/ARS).

Map illustration © 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>).

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