Dolerus junci (Stephens, 1835), 2022

Liston, Andrew, Mutanen, Marko, Heidemaa, Mikk, Blank, Stephan M., Kiljunen, Niina, Taeger, Andreas, Viitasaari, Matti, Vikberg, Veli, Wutke, Saskia & Prous, Marko, 2022, Taxonomy and nomenclature of some Fennoscandian Sawflies, with descriptions of two new species (Hymenoptera, Symphyta), Deutsche Entomologische Zeitschrift 69 (2), pp. 151-218 : 151

Dolerus junci (Stephens, 1835) nom. rev.

Dosytheus Junci [sic!] Stephens, 1835: 84-85. Sex not explicitly stated. Syntypes. Published type localty: "Devonshire, and near Windsor" (England). Lectotype designated below.

Dolerus Busaei [sic!] Snellen van Vollenhoven, 1858: 277. Sex not given. Lectotype ♂ designated by Thomas (1987). Type locality: “Haarlem” (Netherlands). syn. nov.

Dolerus cothurnatus auct. nec Serville, 1823 (e.g. Benson 1952, Zhelochovtsev 1994, Lacourt 2020).

Dolerus thargitai Zombori, 1994: 185-187. ♀. Holotype. Type locality: Csíkszentkirály, Borsáros, Kérújfürdő: Tolvajos patak (Romania). syn. nov.

Remarks.

Similarly to the melanic color form of D. yukonensis (see below), which was described as a distinct species, D. scoticus , by Cameron (1881a), the melanic form of D. junci was also described as a distinct species, D. thargitai , by Zombori (regarded as a synonym of D. yukonensis / D. scoticus until now). The melanic color form of D. junci has also been recorded from central Europe (Germany) and southern Europe (Italy, Switzerland: see, e.g. Pesarini 2012), but is not known from Fennoscandia. The males of the melanic forms of D. junci (01.06.1984) and D. yukonensis (24.05.1984) have been collected at the same locality at nearly the same time (Germany: Federsee, Brackenhof, leg. E. Jansen, CEJ). In addition to their different penis valve structure and other characters used in the keys by Benson (1952) and Zhelochovtsev (1994), D. junci and D. yukonensis differ in the shape and sculpture of the mesoscutellar appendage: almost unsculptured and without a distinct longitudinal keel in the former, and clearly sculptured and with a distinct keel in the latter. Most likely, the melanic color form of D. junci does not occur within the geographic range of D. incisus , but they can also be distinguished by the shape and the sculpture of the mesoscutellar appendage: meshed (nearly matt) and long, with a distinct median longitudinal keel ( D. incisus ) versus short and almost unsculptured (more or less glossy) and without a distinct median keel ( D. junci ).

Type material examined and taxonomic notes.

Dosytheus junci Stephens, 1835. Lectotype ♀ hereby designated, labelled: "Type H.T. [holotype]" [round with wide red margin, printed; not a holotype but a syntype!], "B.M. TYPE HYM. [printed] 1.575.", "B.M. TYPE HYM. [printed] Dosytheus Junci Stephens 1835.", " Junci .", "Stephens Coll. 53-46" [printed], " Dolerus palustris , Klug." [printed], " Lectotypus 2012 Dosytheus junci [printed]♀ [symbol handwritten] Stephens, 1835 M.Heidemaa des. [printed]", " Dolerus junci Stephens, 1835 M.Heidemaa det." [printed]. Condition: legs partly destroyed, left midleg missing, the apical flagellomeres missing, apex of left forewing broken. BMNH.

The original description of D. junci by Stephens (1835) refers to syntypes ("Devonshire and near Windsor"). Although Kirby (1882) mentioned a "Type of D. junci ", this cannot be regarded as a lectotype designation, even though he was apparently only able to locate a single specimen.

Dolerus busaei Snellen van Vollenhoven, 1858. Photos of the lectotype and of the penis valve were checked. Left midleg and two segments of the right antenna missing; the genital capsule is glued on a card. RMNH. This nominal taxon was previously treated as a synonym of D. cothurnatus auct.

Dolerus cothurnatus auct. nec Serville, 1823. Haris and later Lacourt (2000) studied the syntypes (3 ♂) of D. cothurnatus Serville, but not their genitalia. Based on their penis valve structure, none of the syntypes fits D. cothurnatus auct.: the two syntypes (among them the one labelled as lectotype) represent D. germanicus and the third one is a male of D. aericeps . The name D. cothurnatus by Serville is placed here as a junior synonym of D. germanicus , by designating its lectotype (see also under D. germanicus ), and the name Dolerus junci (Stephens, 1835) has to be used for D. cothurnatus auct. nec Serville.

Dolerus thargitai Zombori, 1994. The holotype and some paratypes (2♀, 4♂) were studied. HNHM.