Pantisarthrus Förster, 1871

Camargo, Luiza Figueiredo, Shimbori, Eduardo Mitio & Penteado-Dias, Angélica Maria, 2020, New Neotropical species of Pantisarthrus Förster, 1871 (Hymenoptera: Ichneumonidae), Zootaxa 4728 (4), pp. 443-452 : 444-445

Genus Pantisarthrus Förster, 1871

Type species Pantisarthus inaequalis Förster, 1871: 110

Diagnosis (modified from Dash, 1992): body slender; face and thorax polished with sparse punctation, clypeus convex, separated from face by a groove, malar sulcus present, mandible slender and not twisted; propodeum with complete carination, except anterior transverse carina absent, and median longitudinal which is present only in some species; epipleurum of metasomal segments 2 and 3 separated from terga by a crease, presence of glymma and the first sternite ending before or at half of the tergite; ovipositor straight, 0.16 – 0.5× length of hind tibia; areolet absent, discoidella absent or faint.

Biology. The only host record for the genus is of Pantisarthrus lubricus ( Förster, 1871) , which is a parasitoid of the fungus gnat, Phronia strenua Winnertz, 1863 ( Diptera : Mycetophilidae ) ( Roman, 1923).

In our study, almost all of the 32 Pantisarthrus specimens, among a total of 1,473 Orthocentrinae , were collected in September and in high altitudes between 960 and 1,600 m. Only one specimen was collected in July. As well, only one specimen was collected by Malaise trap, with all others caught by Moericke trap, which proves to be the best method of collecting them.

Distribution. The genus occurs in the Eastern and Western Palaearctic, Nearctic and Oceanic ( Reunion and Mascareignes Island) regions ( Yu et al. 2016). This work is the first record of Pantisarthrus for the Neotropics, at the Reserva Privada do Patrimônio Cultural de Itamonte, Minas Gerais state and at the Parque Estadual da Serra do Mar, São Paulo state, both location in Atlantic Forest, in Brazil ( Fig.1 ).

Comments. The genus was first described by Förster (1871) with three included species, Pantisarthrus inaequalis Förster, 1871 , Pantisarthrus luridus Förster, 1871 and Pantisarthrus ochropus Förster, 1871 (Van Rossem, 1981). In 1904, Strobl described Pantisarthrus rudepunctatus Strobl, 1904 Pantisarthrus subalpinus ( Strobl, 1904) and Pantisarthrus pseudochropus Strobl, 1904 , and Benoit (1957) described Pantisarthrus isolatus ( Benoit, 1957) , the Oceanic species. Van Rossem described Pantisarthrus dispar Rossem, 1981 , and Pantisarthrus gracilis Rossem, 1987 . Aniseres lubricus Förster, 1871 , P. inaequalis (Van Rossem, 1991) , P. ochropus , P. pseudochropus and P. subalpinus ( Humala, 2003) were all synonymized as P. lubricus . Therefore, the valid species are P. lubricus , P. luridus , P. rudepunctatus , P. isolatus , P. dispar and P. gracilis (Van Rossem, 1991; Humala, 2003; Yu, et al., 2016).

Figures

FIGURE 1. Distribution map for Neotropical species of Pantisarthrus.