Hoplocampa alpina ( Zetterstedt, 1838 )

Liston, Andrew, Prous, Marko & Vårdal, Hege, 2019, A review of West Palaearctic Hoplocampa species, focussing on Sweden (Hymenoptera, Tenthredinidae), Zootaxa 4615 (1), pp. 1-45 : 11

Hoplocampa alpina ( Zetterstedt, 1838)

Selandria pallida Newman, 1837: 262 . Lectotype ♀, designated by Liston & Prous (2014: 88, DEI-GISHym19995), examined, in OUMNH. Type locality: no data [ United Kingdom?]. Secondary homonym of Tenthredo pallida Serville, 1823 (= Hoplocampa flava ). Placed as a synonym of alpina by Liston & Prous (2014).

Tenthredo alpina Zetterstedt, 1838: 339 ; Syntypes ♀ ♂, lectotype ♀ here designated (DEI-GISHym15883, images: https://doi. org/10.6084/m9.figshare.4755037), in MZLU. Type locality: Norway, Gamstenstind (see Greve 1986). Paralectotypes: 1 ♀ 2 ♂ same data as the lectotype, in MZLU (♂, DEI-GISHym15882, https://doi.org/10.6084/m9.figshare.4756771) .

Additional description. Body length: 3.5–5.5mm. Clypeus narrowly and deeply emarginate. Pale colour milkywhite. Female: valvula 3 and valvifer 2 combined length ca 0.79–0.97 as long as metafemur without trochantellus. The following may be more or less fuscous, or black: upperside of antennal flagellum, anterior of median mesoscutal lobe, interior mesopostnotum, tarsi. Lancet: Fig. 77 . Male: the following may be more or less fuscous, or black: anterior of median mesoscutal lobe, interior mesopostnotum, metapostnotum, narrow basal and apical margins of abdominal terga 1–3. Penis valve: Fig. 94 .

Total number of specimens examined: 44.

Similar species. Most similar in coloration are Hoplocampa ariae and phantoma (see key). Very pale specimens of crataegi , from southern Europe, are also similar, but in crataegi the radius is darker than the other venation, whereas in alpina , ariae , and phantoma all venation is equally pale. The lancet of alpina ( Fig. 77 ) is closely similar to that of ariae ( Fig. 78 ) and crataegi ( Fig. 79 ), but the ventralmost ctenidial tooth on the middle annuli is situated more ventrally in the former. The most reliable difference between the lancets of alpina and phantoma ( Fig. 80 ) is the presence of ctenidial teeth on annular sutures 1–2 or 1–3 in the former, and on ca. 1–7 in the latter. Males of phantoma and alpina are only distinguishable by examination of the penis valve: phantoma without group of long setae at apex of valviceps ( Figs 98–99 ), alpina with group of long setae ( Fig. 94 ). The penis valves of alpina and crataegi ( Fig. 95 ) are closely similar. Possibly the long setae are apically more strongly curved in crataegi , but it is likely that this apparently slight difference will not separate all specimens. The penis valves of alpina and ariae ( Fig. 96 ) are also similar, but differ in that ariae has a more obtuse valviceps apex and larger group of apical setae, which are also longer.

Life history. Host plant: Sorbus aucuparia ( Pschorn-Walcher & Altenhofer 2000) .

Distribution. Central and northern Europe, including Britain and Ireland ( Taeger et al. 2006).

Occurrence in Sweden: published records: “rare in Sweden, but seems more widespread in Lapland” ( Thomson 1871). Material examined: Skåne, Blekinge, Småland, Gotland, Bohuslän, Uppland, Dalarna, Hälsingland, Jämtland, Lycksele Lappland, Torne Lappmark ( Torne Träsk Region and Karesuando) .

Specimens examined. Austria: 2♀ (DEI-GISHym83554) ( SDEI) . Denmark: 1♀, Höruphav , 28.05.1899 [leg. Wüstnei], SDEI . France: 3♀, leg. H. Savina (priv. Coll. Savina) . Germany: 5♀ (DEI-GISHym83575, 83585) 1♂ (DEI-GISHym11130); Brandenburg; North Rhine-Westphalia; Saxony; Thuringia ( SDEI) . Sweden: Skåne; 1♀, leg. Boheman ( MZLU) . Bohuslän; 1♀ (NHRS-HEVA000003418), Kungshamn , + 59.99390°N + 17.69440°E, 18.06.1944, leg. Lundblad ( NHRS) . Gotland; 1 ♀, Farö, Sudersand , lok. 5, + 57.95564°N + 19.25152°E, 26.06.1964, leg. B.-O. Landin ( MZLU) . Småland ; 3♀ (NHRS-HEVA000006515–6517), leg. Boheman ( NHRS) . Uppland ; 1♀ (NHRS-HEVA000006518), leg. Boheman ( NHRS) . Dalarna; 1♂ (DEI-GISHym20575), Orsa 15km N, + 61.26100°N + 14.58200°E, 11.06.2013, leg. Liston, Prous & Taeger ( SDEI) . Hälsingland ; 1♀ (NHRS-HEVA000006520), Dels- bo, + 61.80858°N + 16.55020°E, August 1904 ( NHRS) . 1♀ (NHRS-HEVA000006519), Tensberget , + 61.66670°N + 15.20000°E, 26.06.1942, leg. Lundblad ( NHRS) . Jämtland; 1♀ (NHRS-HEVA000006521), leg. Boheman ( NHRS) . Ångermanland ; 2♀, Mellerstan, 1.5km W Bodum, 26.06.1964, leg. Brinck-Cederholm ( MZLU) . Lule Lappmark; 1♀, Skalka-forsen, Kuoikavarats, 2km S Björkholmen, Lok. 15, +66.37022 +22.82429°, 04.07.1966, leg. P. Brinck & C. Gustafson ( MZLU) . Torne Lappmark ; 1♀ (NHRS-HEVA000006522), 18.07.1903, leg. Roman ( NHRS) . 8♀ 1♂, Björkliden, 500m asl, + 68.40900°N + 18.63900°E, 28.07.2017, leg. Liston & Prous ( SDEI) . Sweden or Nor- way: Lapponia meridionalis, 1♀ (NHRS-HEVA000006523), leg. Zetterstedt ( NHRS) . No data: 1♀ 1♂ ( SDEI) .

Figures

FIGURES 77–82. Lancets: 77, alpina (DEI-GISHym83575), spurette arrowed. 78, ariae (DEI-GISHym83551). 79, crataegi (DEIGISHym83583). 80, phantoma (DEI-GISHym83552). 81, brevis (DEI-GISHym83557). 82, chamaemespili (DEI- GISHym11128).

FIGURES 94–107. Penis valves: 94 alpina (DEIGISHym20575). 95, crataegi (DEI-GISHym31784). 96, ariae (DEI- GISHym83574). 97, chamaemespili (BC-ZSM-HYM11307). 98–99, phantoma (DEI-GISHym83553): dorsal lobe intact, dorsal lobe destroyed during preparation. 100, flava (DEI-GISHym20595). 101, chrysorrhoea (DEI-GISHym83548). 102, fulvicornis (DEI-GISHym83782). 103, minuta (DEI-GISHym31782). 104, tadshikistanica [after Muche (1986), fig. 1]. 105, pectoralis (DEI-GISHym80337). 106, testudinea (DEI-GISHym83547). 107, plagiata (DEI-GISHym83556).