Hoplocampa plagiata ( Klug, 1816 )

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 : 22-23

Hoplocampa plagiata ( Klug, 1816)

Tenthredo (Allantus) plagiata Klug, 1816: 56 . Syntypes ♀ ♂, Wien , lectotype ♀ here designated (DEI-GISHym2448, im- ages: https://doi.org/10.6084/m9.figshare.7837937.v1), in ZMHUB. Type locality: Vienna ( Austria) . Paralectotypes: 4♀ (DEI-GISHym 2449–2452), in ZMHUB.

Additional description. Body length: 4.5–5.5mm. Clypeus narrowly and deeply emarginate. Lancet: Fig. 88 . Penis valve: Fig. 107 . Normal colour pattern [all specimens except some from France]: Pale body colour orangebrown. Mesoscutellar appendage at least pale in middle. Metatibia largely pale with obscurely fuscous apex, to extensively fuscous. Tarsi pale, to more or less fuscous. Fore wing pterostigma unicolorous pale. Female: Antenna mainly black, more or less pale apically and ventrally. Occiput largely pale, except around foramen magnum. Abdominal sterna and all downturned lateral areas of terga pale, with a broad black vitta on dorsum of terga 1–4(–6). Valvula 3 basally pale, apically black. Male: Antenna largely pale, basal antennomeres sometimes slightly fuscous above. Dorsum of terga 1–4(–8) with black vitta, progressively interrupted distally. Colour pat- tern of dark form [only known from France: Massif Central and Pyrenees]: Female. The darkest specimen examined has head black, except for pale labrum, clypeus and genae, and obscurely brown orbits and temples. Thorax entirely black; all legs nearly completely suffused with black. At least terga 9 and 10 pale. Male. The darkest specimen examined is markedly paler than the darkest female. Head with large dark fleck from post-ocellar area to around toruli, contiguous with dark occiput. Mesoscutal lobes partly pale, and posterior of mesoscutellum; mesepisternum largely black, with ventral part pale. Femora entirely pale; tibiae largely pale. Abdomen mainly black, with apical terga and sterna more or less pale.

Total number of specimens examined: 35.

Similar species. Normal, paler coloured plagiata are only likely to be mistaken for chamaemespili : see under the latter, above. The dark form of plagiata (only known from the Massif Central and Pyrenees) might be mistaken for minuta . In cases of doubt, plagiata females can be easily distinguished from all other European Hoplocampa species by the very large and strongly projecting sawteeth ( Fig. 88 ), and the male by the outline of the penis valve ( Fig. 107 ), which resembles only slightly that of the very differently coloured (pale) phantoma .

Life history. Host plant: Amelanchier ovalis ( Masutti & Covassi 1980, Pschorn-Walcher & Altenhofer 2000). Mentions in the earlier literature of Crataegus as a host (e.g. Enslin 1914) arose through misidentification of crataegi . Aronia , also mentioned by Enslin (1914), probably refers to a synonym, Aronia amelanchier , of Amelanchier ovalis . Biology: Masutti & Covassi (1978).

Distribution. Central Europe ( Taeger et al. 2006), the Iberian Peninsula (see below), and Caucasus ( Zhelochovtsev & Zinovjev 1995), from lowland altitudes (e.g. Vienna Basin) to around the tree-line in the Alps; not in the British Isles.

Occurrence in Sweden: not recorded, and not expected.

Specimens examined. Austria: 1♂ (DEI-GISHym18918), Hernstein, Piesting , 31.05.1996, leg. S. M. Blank ( SDEI) . France: 12♀, 5♂, including dark form 7♀ (DEI-GISHym31957, DEI-GISHym31958), 1♂ (DEI- GISHym31959) from Midi-Pyrénées, Dept. Ariège, Sinsat /Ornolac-Ussat-les-Bains, 18/ 21.04.2018, leg. H. Savina ( SDEI) [collected together with 4♀, 4♂ pale form]. Germany : 5♀, 06.05–10.06; Baden-Wuerttemberg; Bavaria (DEI-GISHym19411); North Rhine-Westphalia (DEI-GISHym83556); Rhineland-Palatinate ( SDEI, ZSM) . * Spain: Aragón; 2♀ (including DEI-GISHym83555), Camarena de la Sierra 7 km SSW, 1470 m asl, + 40.12173°N - 1.05021°E, 05.05.2014, leg. Liston, Prous & Taeger ( SDEI) . Valencia; 1♀, Parque Natural Puebla de San Miguel, Mas del Olmo , 980 m asl, + 40.06434°N - 1.17838°E, 05.05.2014, leg. Liston, Prous & Taeger ( SDEI) . Switzerland: 1♂ (BC-ZSM-HYM10950) ( ZSM) .

Figures

FIGURES 83–88. Lancets: 83, flava (DEI-GISHym83558). 84, fulvicornis (DEI-GISHym31788). 85, minuta (DEI- GISHym83545). 86, tadshikistanica (DEI-GISHym31786). 87, testudinea (DEI-GISHym31790). 88, plagiata (DEI- GISHym83555).

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).