Hedychrum bidentulum Lepeletier, 1806

Rosa, Paolo & Xu, Zai-fu, 2015, Annotated type catalogue of the Chrysididae (Insecta, Hymenoptera) deposited in the collection of Maximilian Spinola (1780 - 1857), Turin, ZooKeys 471, pp. 1-96 : 63-65

Taxon classification Animalia Hymenoptera Chrysididae

Hedychrum bidentulum Lepeletier, 1806 Plate 49

Hedychrum bidentulum : Lepeletier 1806: 121.

[♂]: Hedychrum bidentulum , Lepel. 121; Europa / nitidus Panz. 97.17. (currently Philoctetes bidentulus ).

Material.

Neotype (here designated) ♂. Hedychrum bidentulum : Machecoul [Loire-Atlantique department, France] ( Loire-Inférieur) Dr. Marmottan 7.1901 / Omalus Pz. biaccinctus Lep. Linsenmaier det. / NML_ENT GBIF_Chr00001055 / Neotypus Hedychrum bidentulum Lepeletier, 1806 P. Rosa des. 2013.

Casolari & Casolari Moreno: Cleptes (sic!) bidentulum , 148, 85, 0, 5 (box 50).

Remarks.

Lepeletier (1806) described Hedychrum bidentulum based on a male collected in the environs of Paris. There are five specimens under the name Hedychrum bidentulum at the MNHN: two of them belong to the species Pseudomalus auratus (Linnaeus, 1758) and three specimens are Pseudomalus pusillus (Fabricius, 1804) (Buysson 1897: 563). No specimen is labelled as "type"; other specimens found in the historical collections of Bosc and Lucas and identified as bidentulus or bidentatus belong to the species Pseudomalus auratus (Linnaeus); in the general collection (including du Buysson’s collection) and Sichel’s collection there are some specimens of Hedychrum bidentulum , collected in different localities. Casolari and Casolari Moreno (1980: 77) placed erroneously bidentulum in the genus Cleptes . The original label is: " Hedychrum [ Hedychrum ] bidentulum Lepel. 121". Two of the five specimens identified as bidentulum were received by Latreille or Serville and bear a round and numbered label. The one bearing the number 1651 is truly a Hedychrum bidentulum and could be the type of Hedychrum bidentulum .

Kimsey and Bohart (1991: 245) placed Hedychrum bidentulum in synonymy with Omalus aeneus (Fabricius, 1787). No European author ever accepted this synonym. Strumia (1995: 4) included Hedychrum bidentulum in the genus Pseudomalus , but the correct placement is in the genus Philoctetes ( Niehuis 2001: 121; Rosa 2003: 305; 2005: 126).

Since the holotype of Hedychrum bidentulum is currently lost, since this species is widely distributed in Europe and common at some localities, we designate a neotype to fix the interpretation of this species sensu Linsenmaier (1959). The specimen is a male housed in the Linsenmaier collection at NML and bears the following labels: Hedychrum bidentulum : Machecoul [Loire-Atlantique department, France] ( Loire-Inférieur) Dr. Marmottan 7.1901 / Omalus Pz. biaccinctus Lep. Linsenmaier det. / NML_ENT GBIF_Chr00001055 / Neotypus Hedychrum bidentulum Lepeletier, 1806 P. Rosa des. 2013.

The neotype matches the interpretation of the species given by European authors and some drawings and photographs can be found, for example, in Kunz (1994: 49, figs 58, 62), Linsenmaier (1997b: 49, fig. 18), and Rosa (2006: tav III: figs 19, 21).

Current status.

Philoctetes bidentulus (Lepeletier, 1806) (tranferred by Niehuis 2001: 121).