Dolerus aericeps Thomson, 1871

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 aericeps Thomson, 1871

Dolerus aericeps Thomson, 1871: 285. ♀, ♂. Syntypes. Published type locality: “södra Sverige" [southern Sweden]. Lectotype designated below.

Tenthredo Eglanteriae [sic!] Fabricius, 1793: 109-110. syn. nov., nomen oblitum. ♀. Syntypes (assumed). Published type locality: "Habitat in Germania. Dom. Smidt." [Germany]. Lectotype designated below.

Tenthredo (Dolerus) palustris Klug, 1818: 296-297. ♀, ♂. Syntypes. Published type locality: “Deutschland”. Lectotype designated below. Primary homonym of Tenthredo (Allantus) palustris Klug, 1818. syn. nov.

Dolerus bajulus Serville, 1823: 58. ♀. Syntypes (assumed). Type locality: “Paris”. Lectotype designated below.

Type material examined and taxonomic notes.

Dolerus aericeps Thomson, 1871. Lectotype ♀ hereby designated, labelled: “Båst[ad]” [Type locality: Sweden, Skåne, Båstad], " Dolerus aericeps " [blue line along upper margin], " MZLU 2013 416" [pale green, printed, loan record], " Lectotypus 2014 Dolerus aericeps ♀ Thomson, 1871 M.Heidemaa design." [printed, red], " Dolerus aericeps Thomson, 1871 M.Heidemaa det.". In excellent condition. MZLU. Paralectotypes: 2♀, 2♂. MZLU.

Tenthredo eglanteriae Fabricius, 1793. Lectotype ♀ hereby designated, labelled: " eglan [...] riae ", "LECTOTYPE Tenthredo eglanteriae Fabricius, 1793 des. SMBlank 2008" [red, printed], " Dolerus eglanteriae (F.) = Dolerus bajulus Serv. [handwritten] det. S.M.Blank 2008 ✓" [printed], " ZMUC-GISHym 1014", " Dolerus aericeps Thomson, 1871 M.Heidemaa det." [printed]. Left hind tarsus and some other tarsomeres missing. ZMUC.

Among 2♀ and 1♂ specimens preserved in the ZMUC collection under the name T. eglanteriae , only the above female can be regarded as a syntype. The scutellum of the other female is red, and the tip of the abdomen of the male black. Both characters conflict with Fabricius’ original description. Compared with the other two specimens, the pale parts of the legs of the lectotype are darkened. The lectotype agrees with the species which has for a long time been known as Dolerus aericeps Thomson, 1871 ( Zhelochovtsev 1994), characterized for example by the laterally directed and distally curved setae of the ovipositor sheath. Lacourt (2000) used the name D. bajulus Serville, 1823 for this species, but Blank et al. (2009) presented arguments for the use of the name D. aericeps (nomen protectum) versus D. bajulus (nomen oblitum). Tenthredo eglanteriae was synonymized with T. germanica by Klug (1819) and with Athalia glabricollis Thomson, 1870 by Konow (1897a). Since Brullé (1846), T. eglanteriae (nomen oblitum) has never again been used as valid, while between 1971-2021 the name Dolerus aericeps (nomen protectum) was used as valid by more than 120 authors in over 150 publications (Article 23.9.1, ICZN 1999). One paralectotype male of D. cothurnatus Serville belongs to this species (see under D. germanicus ).

Tenthredo (Dolerus) palustris Klug, 1818. Lectotype ♂ hereby designated, labelled: “14190” [collection catalog no.], "cotypus von Dol. palustris Klg. = Dolerus aericeps Thoms. O.Conde det 1941" [handwritten by Otto Conde], "GBIF-GISHym 2342" [printed], " Lectotypus [printed] ♂ Tenthredo (Dolerus) palustris Klug, 1818 [handwritten in block letters] M.Heidemaa des. [printed]" [red], " Dolerus aericeps Thomson, 1871 M.Heidemaa det.", "Zool. Mus. Berlin" [printed]. Left forewing and metatarsi missing, half of the genital capsule glued on a paper card and pinned with the lectotype. Paralectotype ♂ ("GBIF-GISHym 2341") with same labelling (except " Paralectotypus "). All in ZMHB.

Formerly placed as a synonym of D. cothurnatus auct. (= D. junci (Stephens, 1835)), e.g. by Taeger et al. (2010).

Dolerus bajulus Serville, 1823. Lectotype ♀ hereby designated, labelled: " Dolerus bajulus , Lep.", "Lectotype [red, printed in block letters]", "Lectotype D. bajulus LEP. det.: H.Haris 1996" [white], " D. aericeps THOMS. ♀ det.: A.Haris", " Lectotypus [printed] ♀[handwritten] Dolerus bajulus Serville, 1823 [handwritten in block letters] M.Heidemaa design." [printed, red]. " Dolerus aericeps Thomson, 1871 M.Heidemaa det" [printed]. MNHN.