Hedychridium Abeille de Perrin 1878
Creators: name: Rosa, Paolo
name: Heim, René
name: Bernasconi, Marco Valerio
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Chrysididae
Hedychridium

description: The genus Hedychridium in Linsenmaier’s systematics
Linsenmaier subdivided the Palaearctic species of the genus Hedychridium in four subgenera and fiveteen species groups. In the first revision of the West Palaearctic species, Linsenmaier (1959a) proposed three subgenera: Hedychridium s.str., Acrotoma Mocsáry, 1902b and Hexachrydium Bischoff, 1913 (correct spelling: Hexachridium). The name Acrotoma Mocsáry, 1902b is objectively unavailabe because it is a junior homonym of Acrotoma Boettger, 1881 (Mollusca, Clausiliidae) (Kimsey & Bohart 1991). However, Linsenmaier (1999) continued to use it as valid subgeneric name. Linsenmaier (1959a) considered Buyssonia Mocsáry, 1902b and Wollmannia Mocsáry, 1909 as synonyms of Acrotoma and Tetrachrydium Zimmermann, 1952 synonym of Hexachridium. Only later, Linsenmaier (1968) correctly recognised Wollmannia as a subgenus of Hedychrum Latreille, 1802, after receiving a specimen in exchange from Nikol’skaya.
Linsenmaier (1959a) firstly established two species groups: H. roseum group and H. sculpturatum group. Afterward, Linsenmaier (1968) provided the first classification of the species groups and established the following ones: H. luteipenne group, H. planifrons group, H. postthoracicum group, H. plagiatum group, H. ardens group, H. monochroum group (= Cyrteuchridium Semenov-Tian-Shanskij, 1954), H. incrassatum group (= Zarudnium Semenov-Tian-Shanskij, 1954, Zarudnidium Semenov-Tian-Shanskij, 1954, Cyrteuchrum Semenov-Tian-Shanskij, 1954), H. margaritaceum (= Irenula Semenov-Tian-Shanskij & Nikol’skaya, 1954), H. flavipes group (= Colpopyga Semenov-Tian-Shanskij, 1954), H. roseum group (= Euchrum Semenov-Tian-Shanskij, 1954), H. sculpturatum group (= Euchrum Semenov-Tian-Shanskij, 1954). In the same publication, Linsenmaier (1968) described the subgenus Prochridium. Some years later, Linsenmaier (1994) established the H. semenovi group, and then (1997) the H. anale and H. heliophilum groups. Finally, some changes were proposed by Linsenmaier (1999), namely the description of the H. luteum group and H. modestum group, and the union of some groups: H. ardens-monochroum group and H. roseum-sculpturatum group. If the formation of the first group was unnecessary and not supported by any morphological or molecular analyses, the establishment of the H. roseum-sculpturatum group was a new step forward a better classification, since members of the H. roseum group subsequently proved to be females (with nonmetallic abdomen) and males (with metallic abdomen included in the H. sculpturatum group) of the same species (Rosa 2003; Arens 2004a).
Linsenmaier’s classification (1959a, 1959b, 1968, 1969, 1987, 1993, 1994, 1997, 1999) for the Palaearctic species is here syntethised.
Genus Hedychridium Abeille de Perrin, 1878
Subgenus Prochridium Linsenmaier, 1968
Subgenus Hedychridium s. str.
modestum group
planifrons group
plagiatum group luteum group
ardens-monochroum group
coriaceum group
anale group
heliophilum group
incrassatum group
flavipes group
elongatum group
margaritaceum group
roseum - sculpturatum group
Subgenus Acrotoma Mocsáry, 1902b
Subgenus Hexachridium Bischoff, 1913
Remarks. The H. planifrons group was renamed attenuatum group by Kimsey & Bohart (1991) and later H. wroughtoni group by Strumia (1999), because Hedychridium wroughtoni du Buysson, 1896 is the first species described in the species group.
description: Published as part of Rosa, Paolo, Heim, René & Bernasconi, Marco Valerio, 2022, The Palaearctic types of Chrysididae (Insecta, Hymenoptera) deposited in the Linsenmaier collection. Part 2. Elampini: genus Hedychridium Abeille de Perrin, 1878, pp. 1-94 in Zootaxa 5090 (1) on pages 82-84, DOI: 10.11646/zootaxa.5090.1.1, http://zenodo.org/record/5836207