Physotarsus tunchi Reshchikov

Reshchikov, Alexey & Sääksjärvi, Ilari Eerikki, 2015, Seven new species of the genus Physotarsus Townes 1966 (Hymenoptera, Ichneumonidae) from South America, Zootaxa 3972 (1) : -

Physotarsus tunchi Reshchikov sp. n.

Figs 24–26 .

Diagnosis. Physotarsus tunchi Reshchikov sp. n. can be distinguished from all other species of Physotarsus by the combination of the following characters: 1) body orange with black antennae and hind tarsi, 2) wings slightly brown, 3) face very finely and sparsely punctate, 4) hind tarsi stout with first tarsomere 5.5times as long as broad. ( Figs 24–26 ).

Description. Female. Body length 4 mm. Antennae with 27 flagellomeres each. Scapus 0.5 times as broad as long. Head narrowed behind the eyes, shining. Maximal length of temple equal transverse eye diameter; minimal length of temple 0.78 times transverse eye diameter. Face equal height of eye; moderately flat, with bulge. Face shiny, covered with pale setae, finely and sparsely punctate ( Fig. 25 ). Interantennal area flat. Clypeus separated from face by transverse groove; projecting anteriorly, with wide central lobe. Clypeus about 3.2 times as wide as long. Clypeal foveae not large, pointed laterally. Lateral ocelli separated by about 0.5 times their widest diameter from each other and about 3 times their widest diameter from eye margin. Malar space 0.6 times basal mandible width. Occipital carina present on ventral part of head. Mandible teeth equal.

Mesosoma smooth, shining, without punctures. Pronotum smooth, impunctate, shining. Mesoscutum shining and impunctate. Notaulus absent. Epicnemial carina strongly turning towards anterior margin of mesopleuron. Mesopleuron impunctate, shining. Tarsal claws elongate, not pectinate. Hind tarsi 1.5 times as long as hind tibia; each article of hind tarsi length ratio 60:26:20:15:16. Fore wing stigma about 4.8 times longer than wide. Radius intercepted stigma before its middle. Second recurrent vein with a single bulla. Nervellus intercepted below middle. Nervulus prefurcal. Propodeum without carinae.

Metasoma shining. First metasomal tergite 2.5 times as long as apically broad; without shallow median longitudinal impression and longitudinal carinae. Second metasomal tergite elongate. Subgenital plate not enlarged, in male shallowly U-shaped notched ( Fig. 25 ). Parameres slightly shorter than aedeagus ( Fig. 25 ). Aedeagus wide in basal and apical parts ( Fig. 25 ).

Color. Orange ( Figs 23–26 ). Antennae, hind tibiae and tarsi dark. Fore wing slightly brown, apically slightly darker ( Fig. 26 ).

Material. Holotype male, Peru, Cusco, La Convención, La Reserva Comunal Machiguenga, 12°10’39.2’’S 73°02’01.7’’W, 581m., Guadua mixed forest, Malaise tap, 20.iii.2007, leg. A.Asenjo.

Distribution. Peru.

Etymology. The species epithet refers to the name “El Tunchi ”, spirit who is a guardian of the rainforest according to Amazonian legends.

Figures

FIGURES 24 – 26. Holotype male Physotarsus tunchi Reshchikov sp. n. 24) habitus; 25) face; 26) male genitalia.

FIGURES 20 – 23. Holotype female Physotarsus tampobata Reshchikov and Sääksjärvi sp. n. 20) habitus; 21) ovipositor; 22) face; 23) male genitalia.