Austroterobia heydoni, Mitroiu, 2017

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 : 14-16

publication ID

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

publication LSID

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

DOI

http://doi.org/10.5281/zenodo.6038596

persistent identifier

http://treatment.plazi.org/id/4D3D879A-FFAB-FFA0-FF16-C57AFB2FF886

treatment provided by

Plazi

scientific name

Austroterobia heydoni
status

sp. nov.

Austroterobia heydoni   sp. nov.

( Figs 21–28)

Diagnosis. Female (male unknown): head and mesosoma with conspicuous metallic reflections ( Fig. 21); gena conspicuously depressed at mouth corner ( Fig. 26 View FIGURES 22 – 28 ); toruli closer to ventral margin of clypeus than to median ocellus ( Fig. 22 View FIGURES 22 – 28 ); basal two teeth of right mandible very short and close to each other ( Fig. 25 View FIGURES 22 – 28 ); notauli visible only in anterior third of mesoscutum ( Fig. 23 View FIGURES 22 – 28 ); marginal vein about 4× as long as broad ( Fig. 28 View FIGURES 22 – 28 ).

Austroterobia heydoni   is easily recognizable by its very short marginal vein ( Fig. 28 View FIGURES 22 – 28 ), which is unique among the presently known species of Austroterobia   .

Material examined. Type material. Holotype ♀ (deposited in UCD) [entire; on triangular card]. D. R. CONGO: ‘Dem. Rep. Congo, Bandundu: Wamba , Kikongo Mission, 4°15’S 17°10’E’, ’ 20.IV.2006, S. L. Heydon, S. E. Stevenson, forest Malaise’. GoogleMaps  

Description. Female. Body length: 1.2 mm.

Colour. Head and dorsal side of mesosoma brownish-black, with conspicuous greenish metallic reflections ( Fig. 21); lateral side of mesosoma brown ( Fig. 27 View FIGURES 22 – 28 ). Gaster brown ( Fig. 21). Eyes and ocelli pale reddish-grey ( Figs 22, 23, 26 View FIGURES 22 – 28 ). Antenna ( Figs 21, 24 View FIGURES 22 – 28 ) with scape yellowish; pedicel light brown dorsally, paler ventrally; flagellum light brown. Mandibles yellowish, teeth reddish-brown ( Fig. 25 View FIGURES 22 – 28 ). Fore and mid legs entirely yellowish; hind legs with femora yellowish-brown ( Fig. 21). Wings hyaline, tegula and venation brown ( Fig. 28 View FIGURES 22 – 28 ). Body setation whitish, wing setation brown ( Fig. 22, 23, 28 View FIGURES 22 – 28 ).

Sculpture. Head and most of dorsal side of mesosoma coriaceous to alutaceous except for smooth lower part of clypeus ( Figs 22, 26 View FIGURES 22 – 28 ); malar depression with sculpture denser ( Fig. 26 View FIGURES 22 – 28 ); prepectus smooth ( Fig. 27 View FIGURES 22 – 28 ); mesopleuron mostly smooth except for finely reticulate lower mesepisternum and shallow femoral depression, with indication of a central pit ( Fig. 27 View FIGURES 22 – 28 ); metapleuron extremely finely alutaceous ( Fig. 27 View FIGURES 22 – 28 ); gaster smooth.

Structure. Head. Toruli closer to ventral margin of clypeus than to median ocellus ( Fig. 22 View FIGURES 22 – 28 ). Scape not reaching median ocellus ( Fig. 21). Gena conspicuously depressed at mouth corner ( Fig. 26 View FIGURES 22 – 28 ), posterior margin finely carinate. Malar sulcus absent ( Fig. 26 View FIGURES 22 – 28 ). Eyes broad oval, inner margins not sinuate in middle and almost parallel in lower part ( Fig. 22 View FIGURES 22 – 28 ). Funicular segments not pedicellate ( Fig. 24 View FIGURES 22 – 28 ). Head width about 2.2× length (42:19) in dorsal view and 1.2× height (42:35) in frontal view. POL about 1.1× OOL (9:8). Eye height about 1.3× length (19:15), about 2.1× malar space (19:9), and about 1.3× scape length (19:15). Head width 1.2× length of pedicel plus flagellum (42:35). F1 width about 1.1× length (4.0:3.5); F5 width 1.5× length (4.5:3.0); clava length 2.2× width (11:5).

Mesosoma. Dorsally setose except for metanotum and median area of propodeum ( Fig. 23 View FIGURES 22 – 28 ); prepectus and metapleuron bare ( Fig. 27 View FIGURES 22 – 28 ); mesopleuron bare except for some setae on lower mesepisternum ( Fig. 27 View FIGURES 22 – 28 ). Pronotum barely visible in dorsal view. Notauli deep only in anterior third of mesoscutum ( Fig. 23 View FIGURES 22 – 28 ). Axillae wide apart, medially connected by slightly widened groove separating mesoscutum from mesoscutellum ( Fig. 23 View FIGURES 22 – 28 ). Posterior margin of mesoscutellum evenly curved. Fore wing ( Fig. 28 View FIGURES 22 – 28 ) with small speculum, otherwise completely setose; parastigma without hyaline break; marginal vein distinctly thickened. Mesosoma length about 1.1× width (40:35), width 1.4× height (35:25). Mesoscutum width about 2.3× length (35:15). Mesoscutellum length about 0.9× width (13:15). Fore wing length about twice width (85:43); MV length about 4× width (12:3); MV 0.85× SV (12:14); PV about 1.8× MV (22:12).

Gaster. Ovate, about equal to head plus mesosoma ( Fig. 21); length about 1.6× width (55: 35).

Male. Unknown.

Distribution. Democratic Republic of Congo.

Biology. Unknown.

Remarks. Unfortunately, the propodeum of the holotype is mostly concealed by glue ( Fig. 21), so nothing can be observed about its structure, except that its central area is apparently not setose. However, based on the observed structure of the propodeum in all of the other species of Austroterobia   it is highly probable that it has a complete median carina and well developed plicae. A remarkable character of A. heydoni   is the structure of the right mandible, where the two inner teeth are small and very close to each other, appearing as one double tooth ( Fig. 25 View FIGURES 22 – 28 ). The structure of the left mandible is characteristic for Austroterobia   , while the right mandible structure together with the unusually short marginal vein may indicate a close relationship with Teasienna   . However, the species does not have the other characters of Teasienna   , so it is described in Austroterobia   . Austroterobia heydoni   is the only Afrotropical species of Austroterobia   with incomplete notauli.

Etymology. Named in honour of Dr. Steve Heydon ( UCD), the collector of the holotype, for his contribution to the systematics of Chalcidoidea   .

UCD

University of California, Davis