Plumarius divergens 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 : 452-453

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

( Figs 7 A–D)

Diagnosis. This species is related to P. m al ar i s sp. nov. and P. noa sp. nov. by the long, apically tapering marginal cell of the fore wing, and the anterior ocellus crossed by the supra-torular line. It is distinguished from these two species by the short malar areas, the outer margins of which, in frontal view, diverge apically.

Description. Holotype, ♂. Body length 12.2 mm (paratypes 9.0– 11.4 mm). Color. Brown, head darker and following areas clearer: antennae, apex of clypeus, malar area and legs.

Head. 1.1 × wider than high in frontal view; wider in dorsal view than width of scutum between tegulae (6.2:5.5). OOD 1.4 × diameter of lateral ocellus; POD 1.2 × OOD. Antennocular distance 0.7 × diameter of torulus; interantennal distance 5.1 × antennocular distance. Vertex weakly reticulate, weakly striate, moderately punctate between lateral ocelli (punctures separated by 1 × puncture diameter). Torulus closer to lateral ocellus than to clypeus (1.5:3.2). Lateral ocelli in frontal view below upper margin of head. Median ocellus crossed by supratorular line ( Fig. 7 A). Genal carina present, distinct. Length of area between preoccipital carina and suboral swelling shorter than suboral swelling (0.7:1.2); this area with a median, longitudinal carina; lower area of genal bridge close to mandibular articulation with weak carinae and punctate ( Fig. 7 B). Lengths of malar area and apical width of F1 equal (0.9:0.9); malar area anteriorly striate. Supraclypeal area with lateral striae, densely punctate, slightly rounded in lateral view ( Fig. 7 C). Epistomal suture, evident. Clypeus 1.3 × wider than high, with lateral striae and basally densely punctate; in lateral view slightly rounded and apically not truncate. Proportion of lengths of segments of maxillary palp, from base to apex: 20:20:24:25:25:22. Scape without swelling or projection. F1 5.8 × as long as its apical width, longer than scape and pedicel combined (5.8:5.1).

Mesosoma . Area anterior to pronotal lobe with striae; pronotal lateral carina distinct, forming lower pocket. Notaulus weakly marked, as long as admedian line. Anterior surface of scutum moderately punctate. Propleuron scarcely punctate and mesopleuron moderately punctate. Metapostnotum with striae reaching posterior margin. Propodeum transverse, swollen behind spiracle; with carina anterior to spiracle. Fore wing: marginal cell with anterior margin 2.5 × as long as posterior margin; lengths of vein Rs3 shorter than lengths of Rs4 (2.7:2.9); vein M separated from cu-a by 0.2 × length of cu-a; discal cell rectangular. Hind wing: M and cu-a interstitial. Protarsomere 1 with three outer lateral spines. Metatarsomere 1 1.3 × as long as mesotarsomere 1; inner metatibial spur 1.3 × as long as outer spur.

Metasoma. T7 triangular; apically with a polished area. Genitalia as in Fig. 7 D.

Examined material. Holotype, ♂. ARGENTINA, La Rioja, Anguiñan, Chilecito, 16–30.IV.1969, col Willink, Terán, Stange (Malaise) ( IFML). Paratypes: 8 ♂, Anguiñan, Chilecito, 16–31.IV.1969, col Willink, Terán, Stange (Malaise) ( IFML); 3 ♂, Chilecito, 1.III.1969, col Stange, Willink, Terán ( IFML); 1 ♂, Ruta 40, km 543 ca. Chilecito, 7.IV.2005, col Fidalgo P., Fidalgo G., Torréns ( MACN); 2 ♂, 5 km S Udpinango, 3.XII.2005, col Fidalgo P., Fidalgo G. (IADIZA); 1 ♂, Udpinango, 21.X.2009, col Diez ( YPT) ( MLP). Catamarca, 1 ♂, Los Nacimientos de Abajo, 1–15.VI.1969, col Stange, Willink, Terán ( IFML); 1 ♂, Los Nacimientos de Abajo, 1–15.X.1968, col Stange, Willink, Terán ( IFML); 4 ♂, Los Nacimientos de Abajo, 16–31.X.1968, col Stange, Willink, Terán ( IFML); 4 ♂, ca. Saujil (Fiambalá), 23.XI.2005, col Porter, Fidalgo P., Diez ( MACN); 1 ♂, 10 km N Fiambalá, 16.II.2007, col Fidalgo P., Diez ( MACN); 1 ♂, Ruta 46, 12 km W Andalgalá, 28.III.2005, col Fidalgo P., Torréns ( MACN); 1 ♂, Medanitos, 9.IV.2005, col Fidalgo P. ( MACN); 1 ♂, La Cienaga de Belén, 21.XI.1967, col Stange ( IFML); 1 ♂, Hualfin, Los Nacimientos aguas termales, 21.IX.1953, col Pierotti ( IFML); 1 ♂, Santa María, 11.XII.1965, col Stange ( IFML). Tucumán, 2 ♂, Amaicha, 27.XI.1965, col Stange ( IFML). San Juan, 3 ♂, Ruta 40, 20 km S Huaco, 18.V.1998, col Roig ( MACN). Mendoza, 1 ♂, Lavalle, Telteca, 15.II–25.III. 1996, col Flores, Roig (IADIZA).

Distribution. Argentina (Tucumán, Catamarca, La Rioja, San Juan, Mendoza).

Etymology. The specific epithet, divergens , refers to the apically diverging outer margins of the malar areas in frontal view.

Figures

FIGURE 7. Plumarius divergens sp. nov., ♂. A, Head, frontal view; B, Head, ventral view; C, Head, lateral view; D, Genital capsule, ventral view. Scale bars = 0.5 mm.