Bracalba nigrescens
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Ordo: Hymenoptera
Familia: Platygastridae
Genus: Bracalba
Name
Bracalba nigrescens (Dodd) – Wikispecies link – ZooBank link – Pensoft Profile
- Chromoteleia nigrescens Dodd 1920[1]: 329 (original description); Masner 1965: 71 (type information).
- Bracalba nigrescens (Dodd): Dodd 1931[2]: 80 (generic transfer); Galloway 1976[3]: 88 (type information); Johnson 1992[4]: 354 (catalogued).
Description
Male. Body length 3.38 mm (n=1). Flagellomere length: A3 over 1.5× as long as broad, most others as long or longer than broad. Ocular setae: long and dense. Frontal depression: with many irregularly transverse rugae. Smooth depression extending dorsolaterally from antennal foramen: present. Dorsal clypeal margin: absent between antennal foramina. Clypeal median carina: absent. Ventral clypeal margin: with a small median point. Mandibular teeth: three, but middle tooth tiny. Smooth area obliquely posterior to lateral ocellus: present. Genal sculpture: deeply reticulate-rugose with some septa much stronger than others, forming distinct rows differing in height. Mandibular color: mostly reddish brown, dark at teeth.
Dorsal pronotal area: not set off by carina ventrally. Anterolateral corner of dorsal pronotal area: weakly rounded anteriorly. Sculpture of posteromedian area of mesoscutum: sparsely foveolate, with large smooth interspaces. Lateral margin of dorsal axillar area: with a semicircular expansion, broadest near midlength. Mesoscutellar sculpture: sparsely foveolate, with large smooth interspaces. Metascutellum in dorsal view: elongate-trapezoidal but with incised apex. Dorsal surface of metascutellum: apex protruding dorsally. Femoral depression: crossed by rounded carinae. Anterior corner of lateral propodeal carina: flat, without tooth. Posteromedial corner of lateral propodeal area: protruding posteriorly. Leg color: coxae and at least the last three tarsomeres dark, otherwise yellowish. T7: arched and posteriorly concave.
Diagnosis
Males: Lateral margin of dorsal axillar area semicircularly expanded; mesosoma weakly rounded anteriorly; mesoscutellum without median carina; metascutellum elongate-trapezoidal with incised apex.
Link to distribution map
http://hol.osu.edu/map-full.html?id=4128
Material examined
Holotype, male, Chromoteleia nigrescens: AUSTRALIA: WA, Yallingup, 1.XII-12.XII.1913, R. E. Turner, B.M. TYPE HYM. 9.499 (deposited in BMNH).
Comments
The male holotype of Bracalba nigrescens cannot be associated with any known female Bracalba. It is very similar to Bracalba laminata even though the two species occur on opposite sides of the Australian continent. These species may be closely related to Bracalba hesperia and Bracalba tridentata.
Taxon Treatment
- Burks, R; Masner, L; Johnson, N; Austin, A; 2012: Taxonomic revision of Bracalba Dodd (Hymenoptera, Platygastridae s.l.), a parasitoid wasp genus endemic to Australia ZooKeys, 236: 1-53. doi
Other References
- ↑ Dodd A (1920) Notes on the exotic Proctotrupoidea in the British and Oxford University Museums, with descriptions of new genera and species. Transactions of the Entomological Society of London 1919: 321–382. 36 doi: 10.1111/j.1365-2311.1920.tb00008.x
- ↑ Dodd A (1931) The genus Oxyscelio Kieffer, its synonymy and species, with a description of one new genus (Hymenoptera: Proctotrypoidea). Proceedings of the Royal Society of Queensland 42: 71–81.37
- ↑ Galloway I (1976) The types of Australian species of the subfamily Scelioninae (Hymenoptera: Scelionidae). Queensland Journal of Agricultural and Animal Sciences 33: 83–114. 39
- ↑ Johnson N (1992) Catalog of world Proctotrupoidea excluding Platygastridae. Memoirs of the American Entomological Institute 51: 1–825. 44
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