Nanium atitlanensis Reshchikov & Sääksjärvi, 2018

Reshchikov, Alexey, Sääksjärvi, Ilari E. & Pollet, Marc, 2018, Review of the New World genus Nanium Townes, 1967 (Hymenoptera: Ichneumonidae: Ctenopelmatinae), with two new species from the Neotropical region, European Journal of Taxonomy 459, pp. 1-18 : 13

Nanium atitlanensis Reshchikov & Sääksjärvi sp. nov.

urn:lsid:zoobank.org:act:D06E464A-EB70-4805-B612-F6C8 AE 030443

Figs 1 , 8A

Diagnosis

This species can be distinguished from all its congeners by the combination of the following characters: face black, at most about as broad as high ( Fig. 1A ); pleural carina defined; metasoma with T1 relatively short (1.9 × as long as broad posteriorly) ( Fig. 1B ); hind leg with coxa, at least partly, yellowish ( Fig. 1C ).

Etymology

The species name refers to the type locality (Volcán Atitlán).

Material examined

Holotype GUATEMALA: 1 ♀, Suchitepeq , 4 km S of Vol. Atitlán , 1590 m a.s.l. ± 7 m, 14.54852° N, 91.19331° W, wet cloud forest, MT, 14–18 Jun. 2009, sample code LLAMA #Ma-B- 09-2-01 ( ZMUT).

Description

SEX. Female ( Fig. 1 ).

BODY LENGTH. 4.5 mm.

HEAD. Antennal flagellum with 28 segments. Scape 1.6 × as long as wide. Head narrowed behind eyes, matte, rather square. Face as broad as eye height, convex, bulging, granulate ( Fig. 1A ). Clypeus separated from face by impression; clypeal apex strongly projecting anteriorly; apical margin of clypeus moderately obtuse, with a shallow notch; clypeal foveae small. Malar space 0.8 × as wide as basal mandible width; mandibular teeth of equal length and width.

MESOSOMA. Mesosoma granulate, not punctate, matte, bearing some pale setae ( Fig. 1C ). Notaulus absent. Epicnemial carina high, distinctly defined, almost reaching anterodorsal corner of mesopleuron. Mesopleuron matte, impunctate. Tarsal claws pectinate with small teeth at base. Fore wing without areolet; R intercepting pterostigma immediately behind its middle; 2 m-cu with a single bulla; cu-a intersticial. Hind wing with Cu 1& cu-a intercepted below middle; Cu 1 curved, not reaching edge of hind wing. Propodeal carinae absent except defined pleural carina ( Fig. 1C ).

METASOMA. Metasoma cylindrical, slightly shining, granulate, impunctate, with isolated setae ( Fig. 1B ).

First metasomal tergite 1.9 × as long as broad apically, with shallow median longitudinal impression

bordered by lateral longitudinal carinae. Hind margin of first metasomal sternite at level of spiracles. T2 transverse. Thyridia absent. Hypopygium triangular in profile. Ovipositor sheath slender, slightly wider

apically, 0.7 × as long as metasomal height.

COLOR. Head including face black. Clypeus and mandibles yellowish. Antenna black with scape and pedicel yellowish. Mesosoma black with pronotum yellowish ventrally; tegula yellowish. Fore and mid legs yellowish, hind leg black, with femur ventrally and coxa basally yellowish. Metasoma black, with epipleurae of T2 and T3 entirely yellowish. Pterostigma dark brown.

Distribution

Guatemala (Sololá Department).

Figures

Fig. 1. Nanium atitlanensis Reshchikov & Sääksjärvi sp. nov., holotype, ♀ (LLAMA#Ma-B-09-2-01 (ZMUT)). A. Face (frontal view). B. Metasoma (dorsal view). C. Habitus.

Fig. 8. Distribution and habitats of Nanium. A. Distribution of Nanium species (blue – N. atitlanensis Reshchikov & Sääksjärvi sp. nov.; yellow – N. capitatum Townes, 1967; white – Costa Rican species (N. huberthi Gauld, 1997, N. mairenai Gauld, 1997, N. nogueri Gauld, 1997, N. oriasi Gauld, 1997); red – N. medianum Reshchikov & Sääksjärvi sp. nov.). B. Malaise trap and type locality of N. medianum sp. nov. on the trail Bosque Nublado, Cajanuma, Podocarpus Parque Nacional, Ecuador. C. Trail Oso de Anteojos near the type locality of N. medianum sp. nov., Podocarpus Parque Nacional, Ecuador, where the paratype specimen was captured in a yellow pan trap.