|Notice:||This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see
). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.
If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly.
This page should be cited as follows (rationale):
Citation formats to copy and paste
TY - JOUR
- Baeus matthewi Stevens, Nicholas B., 2007, Zootaxa 1499: 27-29.
(Figs 11 A & B, 16 A) Holotype, Ψ,, Queensland, ' 12.41 S142.41 E, QLD, 5 km S Batavia Downs. 23 Aug– 16 Sep 1992. Flight Intercept trap P. Zborowski & L. Miller' (ANIC). Paratypes: Queensland:2 Ψ, Eungella N.P., 29.xi. 1976, Bouček, 8–9.v. 1980, I.D. Naumann & J.C. Cardale (ANIC); 1 Ψ, Tinaroo Creek Rd, 26 km up via Mareeba, 12–28.i. 1983, Storey & Brown (ANIC); 2 Ψ, same data as holotype (ANIC); 1 Ψ, Heathlands, 11.45 S142.35 E, 25.vii– 18.viii. 1992, P. Zborowski & J. Cardale (ANIC); 1 Ψ, Mt Haig, 17.06 S145.36 E, 4.ii– 17.iii. 1995, P. Zborowski (ANIC); 1 Ψ, Mt Edith, 17.06 S145.37 E, 30.vi– 31.vii. 1995, P. Zborowski (ANIC); Australian Capital Territory:1 Ψ, Canberra, Black Mountain, 36.16 S149.06 E, 22–28.ii. 1998, yellow pan trap, G.Gibson; South Australia:3 Ψ, Brachina Gorge, 31.30 S138.34 E, 4–10.xi. 1987, I. Naumann & J. Cardale (ANIC). Description. Female. Mean length 0.82 mm (0.74–0.86; n = 5); body and head range from black to dark brown, legs and antennae yellow with darker markings on dorsal surfaces. Head. 2.25 (2.17–2.38) x as wide as inter-ocular distance, and 1.86 (1.59 –2.00) x as wide as long; medial ocellus 15 μm in diameter, 82 (80–90) μm from posterior head margin; lateral ocelli touching eye margin, 20 μm from posterior head margin; lateral ocelli very close to (<5 μm) or touching eye margin; posterior ocellar line 1.24 (1.20–1.31) x inter-ocular distance; vertex coriarious, pilosity generally sparse but may be moderately dense posteriorly, generally of medium length but bordering on short which it can be in areas; eyes large and ovoid, eye height 0.53 (0.48–0.55) head height, eye width 0.59 (0.56–0.61) x length, pilosity short; frontal carina prominent, reaching 0.57 (0.54–0.68) distance to medial ocellus; lateral cristulations of malar region extending to within 10 μm of eye margin; in postero-lateral view, anterior and posterior genal margins convergent medially; anterior genal margin in contact with 0.5 of ventral eye margin length; posterior eye margin touching hyperoccipital carina.
Mesosoma. Length 0.55 (0.47–0.60) x width; mesoscutum and mesoscutellum coriarious, pilosity mostly of moderate density, though can be dense in the anterior row of mesoscutellum, and sparse in posterior parts of both sclerites, is of medium length overall though often bordering on being short; propodeum glabrous medio-dorsally; mesoscutum length 0.42 (0.36–0.47) x width, 0.66 (0.63–0.67) x mesosoma length, and 2.86 (2.50 –3.00) x mesoscutellum length; length mesoscutellum 2.1 (2.0– 2.5) x propodeum length; sculpturing dorsal mesopleuron scrobiculate, may end adjacent to or ventral to dorsal margin of metapleuron; sculpturing of propodeum anterior to spiracle confused, region posterior to spiracle carinulate; propodeal spiracle opening round and distinct, with margins prominently raised; dorsal and lateral propodeum delineated by a broad laterally projecting carina (e.g. Fig. 10 C); posterior margin of metapleuron relatively parallel to anterior margin medially, but dorsally curving sharply, nearly at right angles, towards mesopleuron, ending adjacent to level of antero-lateral margin of T 2; ventro-posterior metapleuron elevated from anterior margin of lateral propodeum; hind femoral spine> 15 μm in length. Metasoma. T 2 length 0.90 (0.89–0.91) x width, sculpturing coriarious, pilosity mostly sparse, but can be of moderate density in medial anterior areas, is mostly of medium length, often bordering on short, which it can be in areas; T 3 coriarious anteriorly with wide smooth, nitid band along posterior margin, one row of setae present along posterior extremity of sculpturing; T 4 glabrous.
Comments. Baeus matthewi is clearly recognisable from other species because of its large hind femoral spine that is very distinct under stereo-light microscopey. The only other species to possess such large spines is B. vulcanus, which also has large propodeal spiracles (opening? 20 μm in diameter) that are clearly distinguishable from the smaller spiracles of B. matthewi. This species has mainly been collected along Cape York Peninsula as far south as Mareeba, except for several specimens collected from the Flinders Ranges in South Australia, and from Canberra (Fig. 16 A). The contrasting climatic conditions among the regions possibly indicates that the distribution of Baeus spp. is largely determined by host distribution rather than environmental conditions. This species is named after the brother of the senior author, Mr Matthew Stevens.
- Stevens, Nicholas B.; Austin, Andrew D.; 2007: Systematics, distribution and biology of the Australian ' micro-flea' wasps, Baeus spp. (Hymenoptera: Scelionidae): parasitoids of spider eggs, Zootaxa 1499: 27-29. doi