Dolerus liogaster 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 liogaster Thomson, 1871

Fig. 16A, C, E, H, K, N, Q

Dolerus liogaster Thomson, 1871: 286. ♀, ♂. Syntypes. Type locality: Sweden. Lectotype designated below.

Dolerus schneideri Kiaer, 1898: 62-63. ♀, ♂. Syntypes. Type locality: Tromsø. Lectotype designated below.

Dolerus truncatus ? Dolerus truncatus Lacourt, 1988: 233-235. ♂. Holotype. Type locality: France, Alpes-Maritimes, Vallée de la Minière. CTN.

Type material examined and taxonomic notes.

Dolerus liogaster Thomson, 1871. Lectotype ♂ hereby designated, labelled: "Lp. in." [?Lapland], "LECTOTYPUS [printed] Dolerus liogaster ♂ Thomson, 1871 [handwritten in block letters] design. 1999 M. Heidemaa and M. Viitasaari [printed]" [red], " Dolerus liogaster ♂ [handwritten] M.Heidemaa det. [printed]" [white]. Penis valves dissected, pinned with the specimen. Paralectotypes: 2♀, 1♂. All in MZLU.

Dolerus schneideri Kiaer, 1898. Lectotype ♀ hereby designated, labelled: “Tromsö 22.6.77", "lget expl" [spelling doubtful], "Ex coll. H. Kiaer" [printed], “261” [yellow], "LECTOTYPUS [printed] Dolerus schneideri ♀ Kiaer, 1898 [handwritten in block letters] design. 1999 M. Heidemaa and Viitasaari" [printed (excl. year), red], " Dolerus liogaster ♀M. Heidemaa det." [printed label]. Ovipositor dissected and pinned with the specimen, right antenna missing. Paralectotypes: 2♀. All in ZMUN.

The synonymy of D. schneideri with D. liogaster was first proposed by Lindqvist (1943). Treated here as a color form of D. liogaster , but still separated in the key, because the melanic color form of D. liogaster also has black legs, and D. schmidti has a color form with a red-marked thorax. Specimens resembling D. schneideri are also known from the mountain areas of Central Europe, e.g. from Switzerland at altitudes of 1500-1700 m ( Benson 1961).

Dolerus truncatus Lacourt, 1988. The holotype (CTN) was studied. Its clypeus emargination looks as if it is abnormally developed. The penis valve (Fig. 18 ) appears to be somewhat distorted, perhaps during preparation, but resembles the valve of D. liogaster . Tentatively, we treat D. truncatus as a junior synonym of D. liogaster .

Figures

Figure 16. Dolerus varispinus complex. A. Head dorsal D. liogaster ♀; B. Head dorsal D. schmidti ♀; C. D. liogaster ♀ metepimeron; D. D. schmidti ♀ metepimeron (red arrow), katepimeron (blue arrow); E. D. liogaster fore wing SC 1 (arrow); F. D. schmidti fore wing SC 1; G. D. varispinus fore wing SC 1; H. D. liogaster ♀ katepimeron (arrow); I. D. schmidti ♀ katepimeron; J. D. varispinus ♀ katepimeron; K. D. liogaster serrulae; L. D. schmidti serrulae; M. D. varispinus serrulae; N. D. liogaster penis valve; O. D. schmidti penis valve; P. D. varispinus penis valve; Q. D. liogaster ♀ clypeus; R. D. schmidti ♀ clypeus; S. D. varispinus ♂ clypeus.

Figure 18. Dolerus truncatus Lacourt, 1988, holotype (? = D. liogaster). Penis valve.