Plumarius stangei Diez, Fidalgo & Roig-Alsina

Diez, Patricia A., Fidalgo, Patricio & Roig-Alsina, Arturo, 2013, Revision of the ocellatus species-group of the genus Plumarius Philippi 1873 (Hymenoptera, Chrysidoidea, Plumariidae), with description of three new species from Argentina, Zootaxa 3721 (1), pp. 85-91 : 89-91

Plumarius stangei Diez, Fidalgo & Roig-Alsina , sp. nov.

( Figs 3 A–E)

Diagnosis. Clypeus in lateral view rounded medially; carinae present on lower area of genal bridge close to mandibular articulation; vertex without punctures anteriorly, and weakly punctate behind lateral ocellus.

Description. Holotype male. Length of holotype 7.9 mm. (paratypes 6.3–8.3 mm). Color. Head, pronotum, scutum, scutellum, propleuron and mesopleuron dark brown; mandible except apex, mesothorax, metathorax and gaster pale brown.

Head. 1.3 × as wide as high in frontal view; in dorsal view subequal to width of scutum between tegulae (35:37). Inner margin of orbits converging ventrally. Ocellocular distance equal to diameter of lateral ocellus; postocellar distance 1.3 × ocellocular distance. Antennocular distance 0.7 × diameter of torulus; interantennal distance 4.8 × antennocular distance. Vertex without punctures anteriorly, behind lateral ocellus punctures separated by 1.0 × puncture diameter. Torulus closer to lateral ocellus than to clypeus (12:25). Lateral ocelli in frontal view reaching upper margin of head. Median ocellus crossed by supra- torular line ( Fig. 3 A). Genal carina present, distinct. Length of area between preoccipital carina and suboral swelling equal to length of swelling; this area with median longitudinal carina; lower area of genal bridge close to mandibular articulation with carinae ( Fig. 3 B). Malar area as longer as apical width of first flagellomere; striate anteriorly. Supraclypeal area in frontal view with lateral striae extending to above upper level of torulus; medially with rounded elevation, without striae or punctures. Epistomal suture evident. Clypeus 1.4 × wider than high, with lateral striae; in lateral view rounded medially ( Fig. 3 C). Ratios of segments of maxillary palp, from base to apex: 8:8:14:15:12:14. Scape cylindrical, without basal swellings or projections. First flagellomere 4.0 × as long as apical width, its length longer than to sum of lengths of scape and pedicel (34:30).

Mesosoma . Area anterior to pronotal lobe with weak carinae, pronotal lateral carina distinct, without lower pocket. Notaulus distinctive, as long as admedian line; anterior surface of scutum punctate, more densely around notauli. Metapostnotum with longitudinal striae reaching posterior margin. Propodeum transverse. Forewing: marginal cell with anterior margin 2.0 × as long as posterior margin; vein Rs 3 shorter than Rs 4 (14:21); vein M separated from cu-a by 3.6 × length of cu-a; medial cell rectangular. Hing wing: vein cu-a postfurcal to vein M. Forebasitarsus with 3 outer lateral spines. Hind trochanter with ventral setose area; middle basitarsus shorter than hind basitarsus (20:27); inner hind tibial spur 1.4 × as long as outer spur.

Metasoma. Seventh tergum triangular. Genitalia as Fig. 3 D, E, aedeagus with apical lateral spines.

Type material. Holotype ♂: Argentina, province of Mendoza, Lavalle, Las Catitas, 10.XII.1979, Roig-Alsina (MACN). Paratypes: province of Mendoza, 5 ♂, Lavalle, Telteca, 26.III, 25.IX, and 3.XII.1996, G. Flores and S. Roig (IADIZA); 1 ♂, Malargüe, Pto Agua de los Ciegos, 28.I.1979, Roig-Alsina (MACN)). Province of Catamarca, 1 ♂, 6 km N Belen, 16–31.VII.1969, Malaise trap, Willink, Terán, Stange (IFML). Province of La Rioja, 1 ♂, Catinzaco, 18.XII.1979, Roig-Alsina (MACN); 2 ♂, Anguiñan, Chilecito, 16–31.VII.1969, Malaise trap, Willink, Terán, Stange (IFML).

Distribution. Argentina (Catamarca, La Rioja, and Mendoza).

Variation. The specimens from 6 km north of Belén (Catamarca), Catinzaco (La Rioja) and one specimen from Anguiñan (La Rioja) have a lighter brown body. The specimens from 6 km north of Belén (Catamarca) and one specimen from Catinzaco (La Rioja) have the striae of the area anterior to the pronotal lobe very weak.

Etymology. This species is named after Dr. Lionel Stange, who collected numerous plumariids in Argentina.

Figures

FIGURE 3. Plumarius stangei Diez, Fidalgo & Roig-Alsina, sp. nov., ♂. A. Head, frontal view; B. Head, ventral view; C. Head, lateral view; D, E. Genital capsule, dorsal view. C, carinae; FM, foramen magnum; G, gena; GC, genal carina; PC, preoccipital carina; SS, suboral swelling. Scale bars = 0.5 mm.