Plumarius albinervis Diez & Roig-Alsina

Diez, Patricia A. & Roig-Alsina, Arturo, 2016, Revision of Plumarius Philippi 1873 (Hymenoptera: Chrysidoidea, Plumariidae) from Argentina north of Patagonia, with description of eighteen new species, Zootaxa 4098 (3), pp. 442-470 : 459-460

Plumarius albinervis Diez & Roig-Alsina , sp. nov.

( Figs 13 A–D)

Diagnosis. This species falls in a group with the ocellus crossed by the supra-torular line and the marginal cell shorter than in P. malaris sp. nov. and related species. It is related by the long F1 to P. planatus sp. nov., from which it differs by the propodeum not swollen behind the spiracle and the moderately convex clypeus.

Description. Holotype, ♂. Body length 10.2 mm (paratypes 7.4–10.5 mm). Color. Dark brown with following lighter areas: antennae, apex of clypeus, spot between median ocellus and toruli, legs, and metasoma.

Head. 1.1 × as wide as high in frontal view; narrower in dorsal view than width of scutum between tegulae (5.0:5.4). OOD 1.2 × diameter of lateral ocellus; POD 1.1 × OOD. Antennocular distance 1.2 × diameter of torulus; interantennal distance 2.3 × antenocular distance. Vertex finely reticulated, with weak striae and scarcely punctate between lateral ocelli (punctures separated by 2.5 × puncture diameter). Torulus closer to lateral ocellus than to clypeus (0.7:1.4). Lateral ocelli in frontal view below upper margin of head. Median ocellus crossed by supratorular line ( Fig. 13 A). Genal carina present, distinct. Length of area between preoccipital carina and suboral swelling longer than suboral swelling (1.0:0.7); this area with a weak median, longitudinal carina; lower area of genal bridge close to mandibular articulation without carinae or punctures ( Fig. 13 B). Malar area longer than apical width of F1 (1.2:0.7), striate anteriorly. Supraclypeal area with strong lateral striae, which extend to about upper level of torulus, with convex aspect in lateral view; moderately punctate ( Fig. 13 C). Epistomal suture evident. Clypeus 1.2 × wider than high, basal region scarcely punctate, with lateral striae joining on the middle; not truncate. Proportion of lengths of segments of maxillary palp, from base to apex: 9:14:18:21:20:19. Scape without swelling or projection. F1 6.2 × as long as its apical width, longer than scape and pedicel combined (4.4:3.7).

Mesosoma . Area anterior to pronotal lobe with striae; pronotal lateral carina distinct, forming a lower pocket. Notaulus marked, as long as admedian line. Anterior surface of scutum moderately punctate. Propleuron and mesopleuron scarcely punctate. Metapostnotum with fine striae reaching posterior margin. Propodeum transverse, not swollen behind spiracle; without carina anterior to spiracle. Fore wing: marginal cell with anterior margin 2.4 × as long as posterior margin; length of vein Rs3 shorter than length of Rs4 (3.9:4.5); vein M separated from cu-a by 0.3 × length of cu-a; discal cell rectangular. Hind wing: vein cu-a prefurcal to vein M. Protarsomere 1 with four outer lateral spines. Metataromere 1 1.3 × as long as mesotarsomere 1; inner metatibial spur 1.4 × as long as outer spur.

Metasoma. T7 triangular, apically pointed, with a polished area. Genitalia as in Fig. 13 D.

Examined material. Holotype, ♂: ARGENTINA, Salta, Yacochuya (Cafayate), 1950 m, 16–31.VII.1969, col Willink, Terán, Stange (Malaise) ( MACN). Paratypes: 2 ♂, same data of holotype ( MACN); 2 ♂, Yacochuya (Cafayate), 1950 m, 1–15.IX.1969, col Willink, Terán, Stange ( IFML); 4 ♂, Cachi, 14.II.1969, col Barrera- Paganini ( IFML); 2 ♂, Tacuil, 7.XII.1968, col Willink, Stange ( IFML). Jujuy, 2 ♂, Abra Pampa, 3400 m, 5.II.1960, col Golbach ( IFML). Tucumán, 1♂, entre Amaicha y Sta. María, 28.XI.2005, col Torréns, Fidalgo P. ( MACN). Catamarca, 1 ♂, Los Nacimientos de Abajo, 16–20.II.1969, col Willink, Terán, Stange (Malaise) ( IFML); 1 ♂, 6 km N Belén, 1240 m, 1–15.VI.1969, col Willink, Terán, Stange (Malaise) ( IFML). San Juan, 2 ♂, Camino Paso de Agua Negra, 2600 m, 22.I.1982, col Roig ( MACN).

Distribution. Argentina (Salta, Jujuy, San Juan, Tucumán, Catamarca).

Etymology. The specific epithet refers to the coloration of the wing venation, which in many specimens is whitish.

Figures

FIGURE 13. Plumarius albinervis sp. nov., ♂. A, Head, frontal view; B, Head, ventral view; C, Head, lateral view; D, Genital capsule, ventral view. Scale bars = 0.5 mm.