Atrusca luminata ( Kinsey, 1936 )

Atrusca luminata ( Kinsey, 1936)

Figs 331–343 View FIGURES 331–336 View FIGURES 337–340 View FIGURES 341–343

Cynips View in CoL ( dugesi ) luminata Kinsey, 1936: 118 , female, gall.

Atrusca luminata (Kinsey) : Weld 1952: 314.

Types examined. HOLOTYPE female Cynips View in CoL ( dugesi ) luminata “Quezaltenango 5N Guate 8800’, Mex. Gall 12.21.35, 4 fms. 1.14.36”, “ Q. decipiens, Kinsey View in CoL coll.”, red “ Cynips luminata , Holo- Paratype ”, deposited in AMNH, NYC, examined by GM. Two PARATYPE females “Quezaltenango, Guat 5N, 8800’, Mex., galls 12.21.35”, “ Q. decipiens Kinsey View in CoL coll.”, red label “ Cynips luminata Paratype ”, deposited in the general collection in AMNH, NYC, examined by GM.

Diagnosis. Atrusca luminata belongs to the species group characterized by a reddish brown body color, lacking dark stripes in the mesoscutum, exhibiting fore wings with a complete and conspicuous venation, the Rs vein of radial cell being strongly curved distally, never almost straight, the entirely rugose mesoscutellum, the mesopleuron and speculum sculptured to some degree, with or without piliferous points, and a setose ventral spine of the hypopygium, with setae extending beyond the apex of the spine, as in A. occidua , A. oriens , A. pupoides , A. spadix , and A. vasta . Atrusca luminata can be distinguished from A. occidua , A. oriens , A. pupoides , A. spadix , and A. vasta by the rugose mesopleuron on anterior and posterior margins, the rugae are transversely parallel, and the central part of the mesopleuron is smooth, while in A. occidua , A. oriens , A. pupoides , A. spadix , and A. vasta the mesopleuron lacks any linear element.

Re-description. Asexual female ( Figs 331–343 View FIGURES 331–336 View FIGURES 337–340 View FIGURES 341–343 ). Body, legs, mesosoma uniformly dark brown without stripes, antenna lighter, metasoma lighter with black posterior band.

Head ovate in frontal view, alutaceous, with sparse white setae, 1.3× as broad as high and narrower than mesosoma in frontal view, 1.9× as broad as long in dorsal view. Gena alutaceous, slightly broadened behind eye in frontal view, narrower than transverse diameter of eye in lateral view. Malar space alutaceous-reticulate, without striae; malar sulcus absent; eye 2.5× as high as height of malar space. Inner margins of eyesparallel. POL 1.6× as long as OOL; OOL 2.2× as long as diameter of lateral ocellus and 1.2× as long as LOL; all ocelli ovate, of same size. Transfacial distance 1.3× as long as height of eye and 1.5× as long as height of lower face; diameter of antennal torulus 1.25× as long as distance between them, distance between torulus and eye shorter than diameter of torulus; lower face alutaceous-reticulate, shining, with white setae and piliferous points; slightly elevated median area alutaceous, shining, with few setae. Interocellar area elevated above head in frontal view, lateral ocelli prominent. Clypeus impressed, uniformly coriaceous, rectangular, broader than high, with a few long setae; ventrally rounded, emarginate, without median incision; anterior tentorial pit large, rounded, epistomal sulcus and clypeo-pleurostomal line broad, well impressed. Frons and interocellar area rugose, with some transverse striae above toruli, with a few short setae. Vertex rugose, occiput, postocciput, postgena alutaceous-reticulate, with sparse white setae; posterior tentorial pit large, ovate, area below impressed; occipital foramen as high as height of postgenal bridge; hypostomal carina emarginate, continuing into postgenal sulci which diverge anteriorly, postgenal bridge anteriorly broader than posteriorly. Antenna longer than head+mesosoma, with 12 flagellomeres, pedicel 1.6× as long as broad, F1 slightly shorter than scape+pedicel and 1.1× as long as F2; F2 1.2× as long as F3; F3 slightly longer than F4, subsequent flagellomeres progressively shorter, F12 slightly longer than as F11; placodeal sensilla on F4–F12.

Mesosoma 1.1× as long as high, with sparse short white setae. Pronotum coriaceous- rugose, with dense setae; propleuron alutaceous, shining, with dense setae. Mesoscutum alutaceous-reticulate, with uniformly dense piliferous points, shining, with sparse white setae; slightly longer than broad (greatest width measured across mesoscutum at level of base of tegulae). Notaulus complete, deep, broad, with smooth, glabrous bottom, posteriorly broader and slightly converging; anterior parallel distinct, extend to 1/4 of mesoscutum length, parapsidal lines indistinct, hardly traceable, indicated by smooth, shining stripes; median mesoscutal line in a form of very short impressed triangle; parascutal carina narrow, smooth, reaching notaulus. Mesoscutellum uniformly dull rugose, trapezoid, broader in posterior 1/3, posteriorly rounded, with shallow invagination posterocentrally; overhanging metanotum; mesoscutellar foveae narrow, transverse, broader than high, with smooth, shining bottom, without rugae, separated by an elevated rugose central carina. Circumscutellar carina probably complete but obscured by sculpture. Mesopleuron anteriorly and posteriorly rugose, with transversely orientated parallel rugae, in central part smooth, shining with setae; mesopleural triangle smooth, glabrous, with dense setae; dorsal and lateral axillar areas smooth, shining, with dense setae; subaxillular bar smooth, shining, most posterior part slightly narrower than height of metanotal trough; metapleural sulcus reaching mesopleuron above its mid height, upper part of sulcus distinct. Metascutellum coriaceous, slightly higher than height of smooth, shining ventral impressed area; metanotal trough smooth, shining, without setae; central propodeal area smooth, shining, with some delicate subparallel longitudinal rugae laterally; lateral propodeal carinae strongly bent outwards in posterior 1/3; lateral propodeal area smooth, shining, with long dense white setae. Nucha with irregular sulci laterally and dorsally. Tarsal claws toothed, with basal lobe.

Fore wing longer than body, of normal size, with darker spots and stripes, veins dark brown, wing infuscated, radial cell open, 2.1× as long as broad; second abscissa of Rs curved; R1 and Rs nearly reaching wing margin; areolet triangular, indistinct, Rs+M inconspicuous, traceable along entire length, reaching basalis at mid height.

Metasoma as long as head+mesosoma, higher than long in lateral view; second metasomal tergum extending to 3/4 of metasoma length of in dorsal view, with white setae anterolaterally, without micropunctures; subsequent terga without micropunctures, without setae. Hypopygium without micropunctures, prominent part of ventral spine of hypopygium 2.5× as long as broad in ventral view, with a few setae which extend beyond apex of spine.

Body length 2.7–3.8 mm ( Kinsey 1936).

Gall. The gall is similar to all galls of Kinsey’s bella and dugesi complexes. Mature galls light rosy tan to bright rose, becoming light to dirty brown with age, sometimes unspotted, sometimes oscurely spotted ot mottled with purplish; up to 32 mm, in average 22 mm in diameter.

Biology. The asexual generation is only known to induce leaf galls on Q. rugosa (= Q. decipiens ). Galls mature in late autumn; adults emerge in January–February next year.

Distribution. Guatemala.