Systematics, distribution and biology of the Australian ' micro-flea' wasps, Baeus spp. (Hymenoptera: Scelionidae): parasitoids of spider eggs
Author
Stevens, Nicholas B.
Author
Austin, Andrew D.
text
Zootaxa
2007
1499
1
45
journal article
36400
10.5281/zenodo.177085
080ea21f-59f4-49ee-8045-04d275ce86e6
1175-5326
177085
4.
Baeus hallarakeri,
Stevens
,
sp. nov.
(
Figs 7
B, 8E & F, 15B)
Holotype
: Ψ, Tasmania, '
41.19S
147.56E
, Intake Bridge,
13–29. Jan. 1983
, Tas., I. D. Naumann & J. C. Cardale, ex pantrap' (ANIC).
Paratypes
:
Tasmania:
2 Ψ, same data as
holotype
(ANIC) 3 Ψ,
42.12S
146.30E
,
9 km
S Bronte Park,
15.i– 3.ii.1983
, I. D. Naumann & J. C. Cardale, ex pantrap (ANIC); 1 Ψ,
41.22S
147.24E
,
10 km
ENE of Nunamara,
12.i–6.ii.1983
, I. D. Naumann & J. C. Cardale, ex pantrap (ANIC); 1 Ψ,
42.10S
146.10E
,
7 km
SW by W Derwent Bridge,
16.i–2.ii.1983
, I. D. Naumann & J. C. Cardale, ex pantrap (ANIC).
Description
. Female. Mean length 0.60 MM (0.58–0.62; n = 5); body and head brown, legs and antennae generally same as body and head but with lighter markings on ventral surfaces and apical areas of each segment.
Head. 1.83 (1.80–1.87) x as wide as inter-ocular distance, 1.85 (1.80–1.93) x as wide as long; medial ocellus 10 μm in diameter, 59 (50–65) μm from posterior head margin; lateral ocelli 3 (0–5) μm from eye margin, 20 μm from posterior head margin; posterior ocellar line equal to inter-ocular distance; vertex coriarious, pilosity mostly dense along posterior margin, moderately dense elsewhere, of medium length overall; eyes ovoid, eye height 0.53 (0.52–0.57) head height, eye width 0.46 (0.43–0.50) x eye length, pilosity of medium length; frontal carina usually not reaching 0.5 or more distance to medial ocellus (0.37–0.52); cristulations on malar region not extending to within 10 μm of eye margin; in postero-lateral view, anterior and posterior genal margins varying from parallel to divergent medially; anterior genal margin in contact with 0.70 of ventral eye margin length; posterior eye margin touching hyperoccipital carina.
Mesosoma. Length 0.75 (0.73–0.79) x width; both mesoscutum and mesoscutellum coriarious, pilosity moderately dense except anterior region of mesoscutum which is dense, of medium length overall; medio-dorsally, propodeum may be glabrous, plicate, or intermediate between the two; mesoscutum length 0.56 (0.56– 0.58) x width, 0.68 (0.67–0.69) x mesosoma length and 3.27 (2.86–3.67) x mesoscutellum length; mesoscutellum length 1.82 (1.50–2.00) x propodeum length; sculpturing dorsal mesopleuron and dorso-lateral propodeum confused; propodeal spiracle small and ovoid; posterior suture of metapleuron curved slightly medially, extending dorsally above level of antero-lateral margin of T2; posterior margin metapleuron elevated from anterior region of propodeum; hind femoral spine absent.
Metasoma. T2 length 1.0 (0.93–1.00) x width, faintly coriarious, pilosity dense in patches along anterior margin, but mostly moderately dense except towards posterior region which is sparse, setae of medium length overall; T3 smooth and nitid, bearing one row of setae; T4 glabrous.
Comments
.
Baeus hallarakeri
is similar to
B. glenysae
,
B. murphyi
and
B. mymyae
, the most obvious difference being its larger eyes. This species is known only from Tasmania (
Fig 15
B).
Baeus hallarakeri
is named in honour of Torstein Hallaraker, Senior, of
Norway
.