Austroterobia partibrunnea Girault

Mitroiu, Mircea-Dan, 2017, Revision of world Austroterobiinae and Parasaphodinae (Hymenoptera: Chalcidoidea: Pteromalidae), parasitoids of giant scales (Hemiptera: Coccoidea: Monophlebidae), Zootaxa 4301 (1), pp. 1-63 : 23-27

publication ID

https://doi.org/10.11646/zootaxa.4301.1.1

publication LSID

lsid:zoobank.org:pub:67A78566-A4FD-4E37-96E9-DCC4CCF321E5

DOI

https://doi.org/10.5281/zenodo.6038606

persistent identifier

https://treatment.plazi.org/id/4D3D879A-FFB0-FFB5-FF16-C19BFBBDFD93

treatment provided by

Plazi

scientific name

Austroterobia partibrunnea Girault
status

 

Austroterobia partibrunnea Girault

( Figs 51–60 View FIGURES 51 – 53 View FIGURES 54 – 60 )

A. partibrunnea Girault, 1938: 87 ; lectotype in QMB, photographs examined.

Diagnosis. Both sexes: head and mesosoma usually with distinct green or coppery green metallic reflections ( Figs 51–53 View FIGURES 51 – 53 ); lower margins of toruli much higher than lower margins of eyes ( Fig. 54 View FIGURES 54 – 60 ); antenna with funicular segments slightly pedicellate ( Fig. 56 View FIGURES 54 – 60 ); gena depressed at mouth corner ( Fig. 56 View FIGURES 54 – 60 ); inner margins of eyes not sinuate ( Fig. 54 View FIGURES 54 – 60 ); POL about equal to OOL; mandibular formula 3:2 ( Fig. 54 View FIGURES 54 – 60 ); pronotum not visible in dorsal view ( Fig. 57 View FIGURES 54 – 60 ); notauli visible throughout length of mesoscutum ( Fig. 57 View FIGURES 54 – 60 ); prepectus and dorsal side of propodeum bare ( Figs 58, 59 View FIGURES 54 – 60 ); axillae wide apart ( Fig. 57 View FIGURES 54 – 60 ); posterior margin of mesoscutellum not densely setose, without distinct spine ( Fig. 57 View FIGURES 54 – 60 ); anterior margin of propodeum not distinctly raised, not concealing dorsellum ( Fig. 59 View FIGURES 54 – 60 ); propodeal plicae present, converging posteriorly ( Fig. 59 View FIGURES 54 – 60 ); mesopleuron mostly smooth, femoral depression with deep central pit ( Fig. 58 View FIGURES 54 – 60 ); fore wing ( Fig. 60 View FIGURES 54 – 60 ) wide, length 1.9–2.1× width, with small speculum; parastigma with hyaline break; body size: 1.3–1.7 mm.

Austroterobia partibrunnea most closely resembles A. partiviridis , from which it can be separated mainly by the structure of mesopleuron (with deep central pit, Fig. 58 View FIGURES 54 – 60 ) and fore wing (with speculum and hyaline break on parastigma, Fig. 60 View FIGURES 54 – 60 ), position of the toruli (with their lower margins much higher than the lower margins of the eyes, Fig. 54 View FIGURES 54 – 60 ), and colour (both head and mesosoma with distinct metallic reflections, Figs 51–53 View FIGURES 51 – 53 ).

Material examined. AUSTRALIA: 1♀ ‘SE Queensland: Mt. Tambourine’ , ‘ I. Galloway, Malaise Trap, ×. 1977’, ‘2:3 mand KRESL’, ‘mand 2:3’, ‘ ♀ Austroterobia partibrunnea Grlt , det. Z. Bouček, 1978’, ‘ NHMUK 010198799 View Materials ’ ( BMNH) ; 1♀ ‘SE Queensland: Mt. Tambourine , 21.xii.76, Bouček’, ‘ ♀ Austroterobia partibrunnea Grlt , det. Z. Bouček, 1985’ ( CNC) ; 1♂, same information, ‘NHMUK010198803’ (BMNH); 1♀ ‘ Mt. Glorious nr. Brisbane, QNSLD ., 12.i.77. Boucek’, ‘ Austroterobia partibrunnea Grlt ♀, det. Z. Boucek, 1978’, ‘NHMUK010198802’ (BMNH); 1♀, same information, ’ 16.XII.76 ’, ‘♀ Austroterobia partibrunnea Grlt , det. Z. Bouček, 1978’ (CNC); 1♂, same information, ’ 16.XII.76 ’,‘♂ Austroterobia partibrunnea Grlt , det. Z. Bouček, 1987’, ‘NHMUK010198804’ (BMNH); 1♀ ‘ Sydney U.S. N., Jan 31, 1928 ’, ‘ In mealy bug cage’, ‘H. [indecipherable]’, ‘ Austroterobia det. R. A. Burks 2003’ ( UCR) .

Redescription. Female. Body length: 1.3–1.7 mm.

Colour. Head and most of dorsal side of mesosoma usually with strong green metallic reflections ( Figs 53 View FIGURES 51 – 53 , 54–57 View FIGURES 54 – 60 ); metanotum and propodeum always brown and usually contrasting with rest of mesosoma, with only slight metallic reflections ( Figs 57, 59 View FIGURES 54 – 60 ). Gaster brown, but lighter ventrally as well as basally on dorsal side ( Figs 51, 53 View FIGURES 51 – 53 ). Eyes reddish; ocelli whitish to pale red ( Fig. 55 View FIGURES 54 – 60 ). Antenna ( Fig. 56 View FIGURES 54 – 60 ) with scape yellowish-brown to light brown; pedicel and flagellum brown, lighter ventrally. Mandibles pale yellow, teeth reddish-brown ( Fig. 54 View FIGURES 54 – 60 ). Legs entirely yellowish except for brown pretarsi ( Fig. 51 View FIGURES 51 – 53 ). Wings hyaline, tegula and venation brown ( Fig. 60 View FIGURES 54 – 60 ). Body setation whitish, wing setation brownish ( Figs 54, 57, 60 View FIGURES 54 – 60 ).

Sculpture. Head mainly coriaceous, except for virtually smooth clypeus ( Figs 54, 55 View FIGURES 54 – 60 ); sculpture denser on malar region ( Fig. 56 View FIGURES 54 – 60 ); dorsal side of mesosoma shallowly reticulate, more densely so on frenal area ( Fig. 57 View FIGURES 54 – 60 ); median area of propodeum, apart from median carina and plicae, smooth but with extremely superficial ridges ( Fig. 59 View FIGURES 54 – 60 ); prepectus, mesopleuron and metapleuron mostly smooth to alutaceous ( Fig. 58 View FIGURES 54 – 60 ); femoral depression with deep central pit and densely reticulated lower mesepisternum ( Fig. 58 View FIGURES 54 – 60 ); gaster smooth.

Structure. Head. Toruli about equidistant from median ocellus and ventral margin of clypeus, but their lower margins distinctly higher than lower margins of eyes ( Fig. 54 View FIGURES 54 – 60 ). Scape reaching above lower margin of median ocellus ( Fig. 54 View FIGURES 54 – 60 ). Gena depressed at mouth corner ( Fig. 56 View FIGURES 54 – 60 ), posterior margin carinate. Malar sulcus absent ( Fig. 56 View FIGURES 54 – 60 ). Eyes broad oval, inner margins not sinuate in middle and slightly diverging in lower part ( Fig. 54 View FIGURES 54 – 60 ). Funicular segments slightly pedicellate ( Fig. 56 View FIGURES 54 – 60 ). Head width 2.5–2.7× length in dorsal view and about 1.3× height in frontal view. POL about equal to OOL; POL about 2.3× posterior ocellus largest diameter. Eye height 1.1–1.2× length, 1.3–1.4× malar space, and about 1.1× scape length. Head width about 1.1× length of pedicel plus flagellum. F1 quadrate; F5 width 1.0–1.2× length; clava length 2.5–2.8× width.

Mesosoma. Dorsally setose except for metanotum and median area of propodeum ( Fig. 57 View FIGURES 54 – 60 ); prepectus and metapleuron bare ( Fig. 58 View FIGURES 54 – 60 ); mesopleuron bare except for several setae on lower mesepisternum ( Fig. 58 View FIGURES 54 – 60 ). Pronotum not visible in dorsal view ( Fig. 57 View FIGURES 54 – 60 ). Notauli complete ( Fig. 57 View FIGURES 54 – 60 ). Axillae wide apart, medially connected by wide groove separating mesoscutum from mesoscutellum ( Fig. 57 View FIGURES 54 – 60 ). Posterior margin of mesoscutellum evenly curved ( Fig. 57 View FIGURES 54 – 60 ). Anterior margin of propodeum not distinctly raised, not concealing dorsellum ( Fig. 59 View FIGURES 54 – 60 ). Propodeum with straight, complete median carina and posteriorly converging, almost complete plicae ( Fig. 59 View FIGURES 54 – 60 ). Fore wing ( Fig. 60 View FIGURES 54 – 60 ) completely setose, except for a small speculum; parastigma with hyaline break; marginal vein moderately thickened, slightly narrowing distally. Mesosoma length about 1.1× width, width about 1.3× height. Mesoscutum width 2.5–2.7× length. Mesoscutellum length about equal to width. Propodeum length about 0.5× mesoscutellum length. Fore wing length 2.0–2.1× width; MV about 1.1× as long as SV; PV 1.5–1.6× as long as MV.

Gaster. Ovate, usually collapsing dorsally, shorter than head plus mesosoma ( Figs 51, 53 View FIGURES 51 – 53 ); length 1.8–2.3× width.

Male description. Differs from the female mainly as follows. Body length: 2.3–2.4 mm. Head sometimes with weak golden reflections ( Fig. 52 View FIGURES 51 – 53 ). Antenna lighter, brownish-yellow ( Fig. 52 View FIGURES 51 – 53 ). Genae larger and shinier ( Fig. 52 View FIGURES 51 – 53 ). Eyes smaller and rounder, hence malar space, as well as temples in dorsal view, longer ( Fig. 52 View FIGURES 51 – 53 ). Head less transverse, width 2.2–2.4× length, width about 1.3× length of pedicel plus flagellum. Eye height about equal to both eye length and malar space. Scape with ventral protuberance towards apex; F1 length about 1.1× width, narrower than F2; clava length 2.4–2.5× width. Fore wing length 1.9–2.0× width; MV 1.0–1.1× as long as SV; PV 1.5–1.8× as long as MV. Gaster from slightly to distinctly shorter than mesosoma ( Fig. 52 View FIGURES 51 – 53 ), with subparallel margins, length 1.1–1.3× width.

Distribution. Australia ( Bouček 1988).

Biology. Unknown; possibly associated with unidentified mealy bug ( Hemiptera : Pseudococcidae ) (see record above).

Remarks. My concept of A. partibrunnea is primarily based on a few specimens from BMNH (see above) identified by Z. Bouček between 1976 and 1985, who presumably examined the type material before publishing his revision on Australasian Chalcidoidea ( Bouček 1988) . All these specimens have both the head and thorax dark, with distinct metallic reflections, while in the original description Girault (1938: 87) stated: “Brown, wings clear, the upper thorax except the propodeon [sic] and the head, cyaneous (pronotum brown also).” I have seen images of the lectotype, which looks similar to the specimens from BMNH. It seems that both A. partibrunnea and A. partiviridis are rather variable regarding the colour of head and thorax, while the propodeum is always brownish. The ocelli of A. partibrunnea ( Fig. 55 View FIGURES 54 – 60 ) are larger as compared to those of A. partiviridis ( Fig. 65 View FIGURES 64 – 71 ). However, in two darker specimens (CNC) from the Black Mountains having conspicuous mesopleural pits and highly inserted antennae that I tentatively assign to A. partiviridis , the ocelli are also small; thus, this is probably not a good character to separate the two species and haven’t been included in the key or diagnosis; these two specimens are also excluded from the species redescription.

NHMUK

Natural History Museum, London

CNC

Canadian National Collection of Insects, Arachnids, and Nematodes

UCR

University of California

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Pteromalidae

Genus

Austroterobia

Loc

Austroterobia partibrunnea Girault

Mitroiu, Mircea-Dan 2017
2017
Loc

A. partibrunnea

Girault 1938: 87
1938