A new species and new records of the genus Alexeter Förster (Hymenoptera, Ichneumonidae, Ctenopelmatinae) from Beijing with a key to Chinese species

Abstract

A new species, Alexeterbeijingensis Sheng, sp. nov., and two new records for China, A.angularis (Uchida, 1952) and A.shakojiensis Uchida, 1930, collected in Mentougou, Beijing, belonging to the tribe Mesoleiini of the subfamily Ctenopelmatinae (Hymenoptera, Ichneumonidae), are reported. A key to the six species of Alexeter known from China is given.

The genus Alexeter Förster (Hymenoptera, Ichneumonidae) in China, with descriptions of three new species

“…32) 2.0 × as long as posterior width. Species of Alexeter are mainly found in the Palaearctic, Nearctic and Neotropical Regions (Yu et al 2016), only one is also found in the Oriental Region (Luo et al 2019;Sun et al 2019;Sheng et al 2020). Here, three new species are found in the Oriental Region, increasing the abundance of Alexeter in this fauna.…”

“…The diagnosis of the genus was modified from Gauld et al (1997), Townes (1970) and Sun et al (2019).…”

“…Alexeter Förster, 1869, belonging to the tribe Mesoleiini of the subfamily Ctenopelmatinae (Hymenoptera: Ichneumonidae), comprises 35 species (Yu et al 2016;Sheng et al 2020), of which 14 are from the Eastern Palaearctic Region (seven of them also occur in the Western Palaearctic Region) (Uchida 1930(Uchida , 1952Šedivý 1971;Yu et al 2016;Sun et al 2019;Sheng et al 2020), 18 from the Western Palaearctic (Meyer 1936;Heinrich 1949Heinrich , 1953Hinz 1996;Aubert 1998), three from the Neotropical Region (Gauld et al 1997), seven from the Nearctic Region (Yu et al 2016), and one from Oriental Region (also occuring in the Eastern Palaearctic Region) (Luo et al 2019). Sun et al (2019) reported one new species of Alexeter from Beijing, China. Subsequently, 11 species from China were reported by Sheng et al (2020), of which two were new to science.…”

A remarkable new genus and species of Euryproctini (Hymenoptera: Ichneumonidae, Ctenopelmatinae) from Thailand

“…The tribe Euryproctini Thomson, 1883, together with eight other tribes, comprise the subfamily Ctenopelmatinae Förster, 1869 (Hymenoptera, Ichneumonidae), one of the most poorly known groups of Darwin wasps (Gauld 1997). The Ctenopelmatinae are well represented in all major biogeographical regions, occurring from the Arctic to the tropics, and comprising 1616 species in 111 genera, including 265 species and 19 genera of Euryproctini (Reshchikov 2011(Reshchikov , 2016Kasparyan 2016Kasparyan , 2017Kasparyan , 2018Kasparyan , 2020aKasparyan , 2020bKasparyan , 2021aKasparyan , 2021bKasparyan et al 2016;Lima & Kumagai 2016;Yu et al 2016Yu et al , 2018Yu et al , 2020aYu et al , 2020bYu et al , 2021aYu et al , 2021bReshchikov et al 2017aReshchikov et al , 2017bReshchikov et al , 2017cReshchikov et al , 2019Reshchikov & van Achterberg 2018;Khalaim et al 2019;Sun et al 2019Sun et al , 2020Sun et al , 2021aSun et al , 2021bLi et al 2020;Sheng et al 2020Sheng et al , 2022Watanabe 2021;Li & Sun 2022), excluding genera we consider belonging to Metopiinae Förster, 1869 (Bremiella Dalla Torre, 1901(Quicke et al 2009 and Scolomus Townes & Townes, 1950 (Gauld & Wahl 2006;Araujo et al 2018)).…”