Omalus helveticus Linsenmaier, 1959a

Rosa, Paolo, Heim, René & Bernasconi, Marco Valerio, 2023, The Palaearctic types of Chrysididae (Insecta, Hymenoptera) deposited in the Linsenmaier collection. Part 4. Elampini: genus Omalus Panzer, 1801, Zootaxa 5297 (1), pp. 61-86 : 75

Omalus helveticus Linsenmaier, 1959a

Omalus helveticus Linsenmaier, 1959a: 16 .

Holotype ♀; Switzerland: Engadin, Il Fuorn ( Chur) .

Pseudomalus helveticus: Kimsey & Bohart 1991: 267 .

Philoctetes helveticus: Tussac & Tussac 1993: 475 .

Pseudomalus putoni (du Buysson, 1892) : Strumia 2001: 89 (synonymised).

Philoctetes helveticus: Rosa 2005: 13 . Reinstated.

Type locality. Switzerland: "Schweiz (Engadin, Il Fourn 1900 m, leg. de Beaumont), ♀ Type Nationalpark-Museum, Chur”.

Remarks. The species was originally described as incertae sedis, as the holotype is a female and Linsenmaier (1959a) could not correctly place it in the subgenus Omalus s.str. or Philoctetes without examination of male hind legs. Later, Linsenmaier (1968) considered this species close to Omalus bidentulus (Lepeletier) .

Linsenmaier described Omalus helveticus based on a female collected in Engadin by De Beaumont. This specimen is housed at the Nationalpark-Museum, Chur and must be considered as holotype by monotypy. In 1991, Linsenmaier labelled a male specimen in his collection as the allotype. This specimen bears the following labels: Allotype ♁ Omalus Pz. helveticus Lins. det. Linsenmaier 1991 // Chandolin CH. 4.VII.1982 Alpage 2200m W. Perraudin // 25. Linsenmaier cited this specimen in his latest revision of the European species ( Linsenmaier 1997: 134) and included it in the type-collection. However, this specimen does not belong to the original type series, it was illustrated, and the species has been redescribed by Rosa et al. (2017d). Kimsey & Bohart (1991: 267) placed helveticus in Pseudomalus Ashmead, 1902 ; Tussac & Tussac (1993: 474) and Rosa (2006: 122) in Philoctetes . Strumia (2001: 89) synonymised O. helveticus with Pseudomalus putoni (du Buysson, 1892) , without any type examination. A female specimen of this rare Alpine species collected at Zermatt is also preserved in Linsenmaier’s collection.