Ametallon carinatum Paniagua & Hansson

Paniagua, Miguel, Hansson, Christer & Medianero, Enrique, 2009, Entedoninae (Hymenoptera: Eulophidae) associated with gall-inducing insects (Diptera: Cecidomyiidae) in Panama, Zootaxa 2237, pp. 43-58 : 45-46

Ametallon carinatum Paniagua & Hansson sp. n.

Figures 1 , 8 .

Etymology. In reference to the presence of a carina along posterior margin of pronotum.

Material examined. Holotype female labeled “ Panama: Provincia de Colón, Fuerte Sherman, San Lorenzo, v.2006, M. Paniagua, Cecidomyiidae galls on Inga sp.” ( LUZM). Paratypes: three females with the same label data as the holotype ( MEUP); two females with same label data as the holotype (USJ).

Diagnosis. Anterior half of propodeum with transverse groove that is strongly sculptured; ratio of FM/ HM = 2.2; frontal suture distinct and slightly V-shaped, not reaching the margin of the eyes; frons below frontal suture reticulate, interscrobal area smooth and shiny; vertex dark brown; mesoscutum and scutellum completely reticulate, except a small smooth spot behind the setae on midlobe of mesoscutum; forewing with two admarginal setae and one stigmal hairline; pronotum with a carina along posterior margin; scape 3.8x as long as wide.

Description (female). Length of body 1.6 mm. Scape yellowish-white with tip infuscate, pedicel pale brown, flagellum brown with weak metallic tinges. Frons below frontal suture yellowish-brown, above suture dark brown with metallic tinges. Vertex brown with yellowish-brown spots near lateral ocelli. Occiput yellowish-brown. Midlobe of mesoscutum with anterior half pale brown, posterior half yellowish-brown. Scutellum yellowish-brown, with an anteromedian pale brown spot. Axilla brown. Fore coxa white with apex infuscate, mid coxa brown, hind coxa white with dorsal surface dark brown. Fore and mid femora dark brown, hind femur dark brown with ventroapical half pale brown. Fore tibia yellowish-brown, mid tibia with anterior third pale brown, posterior two-thirds yellowish-brown, hind tibia dark brown with apical quarter yellowish, tarsi yellowish-white. Forewing hyaline with basal cell infuscate and with infuscate spot below base of marginal vein. Petiole yellowish-white. Gaster with first tergite anteriorly dark brown and posterior edge paler, remaining tergites dark brown with metallic purple tinges.

Antenna as in Fig. 1 a. Frons below frontal suture with strong small-meshed reticulation, interscrobal area smooth, above suture and vertex smooth and shiny; frontal suture weakly V-shaped, not reaching the eye. Occipital margin rounded. Occiput with strong small-meshed reticulation. Ratios: HE/MS/WM = 4.4/1.0/2.5; LC/WC = 1.2; POL/OOL/POO = 2.7/1.4/2.5; WH/WT = 1.4.

Pronotum with carina along posterior margin. Mesoscutum with strong, small-meshed reticulation, midlobe with a small smooth spot behind the setae. Scutellum with strong, dense reticulation, meshes larger than on mesoscutum. Dorsellum reticulate. Forewing with speculum closed below, with one stigmal hairline, radial cell bare ( Fig. 1 b). Anterior half of propodeum with a transverse groove with strong irregular sculpture ( Fig. 8 ). Ratios: LW/LM/HW = 1.7/1.0/1.0; PM/ST = 0.8; FM/HM = 2.2.

Gaster elongate. Ratios: MM/LG = 0.7; LF/WF = 0.7.

Male. Unknown.

Host. From lignified galls of an unidentified Cecidomyiidae in the petiole and twigs of Inga sp. ( Fabaceae ).

Biology remarks. A. carinatum parasitized 46% of the reared galls. There were also three more species of parasitoids found with A. carinatum in the Inga sp. galls, two unidentified Braconidae and one unidentified Eurytomidae .

Distribution. Understorey of San Lorenzo Protected Area, Provincia de Colón, República de Panama.

Identification. To accommodate A. carinatum in the key to females of Neotropical Ametallon in Hansson (2004), the ratio of FM/HM must be changed to 1.0 – 2.2 in the second alternative of couplet 8. This species will then key to couplet 15. This couplet should be modified as follows to include A. carinatum :

15(14) Toruli high up on frons, ratio of distances from toruli to frontal suture/to mouth margin = 0.6 – 0.7. ............ 15a - Toruli equidistant between frontal suture and mouth margin. ............................................................................ 16 15a(15) Ratio of distances from toruli to frontal suture/to mouth margin = 0.6; mouth opening as wide as height of eye

in frontal view...................................................................................................................... A. barbillae Hansson - Ratio of distances from toruli to frontal suture/to mouth margin = 0.7; mouth opening is 0.6x as wide as height

of an eye................................................................................................ A. carinatum Paniagua & Hansson sp. n.

Figures

FIGURE 1. Ametallon carinatum sp. n., female: a) antenna lateral, b) forewing, c) thorax lateral.

FIGURE 8 – 11. 8. Ametallon carinatum sp. n., thoracic dorsum (female). 9. Chrysonotomyia longicaudata sp. n., thoracic dorsum (female). 10. Chrysonotomyia longicaudata sp. n., gastral apical tergite (female). 11. Chrysonotomyia machaeriae sp. n., thoracic dorsum (female).