Euura nigriventris ( Holmgren, 1883 )

Prous, Marko, Liston, Andrew, Monckton, Spencer K., Kramp, Katja, Vårdal, Hege, Vikberg, Veli, Heibo, Erik & Mutanen, Marko, 2025, West Palaearctic species of Euura Newman, 1837 (Hymenoptera, Tenthredinidae), European Journal of Taxonomy 977, pp. 1-377 : 224-225

publication ID	https://doi.org/10.5852/ejt.2025.977.2799
publication LSID	lsid:zoobank.org:pub:73DA044B-EB3D-4BF1-97EA-7430036DEEE0
DOI	https://doi.org/10.5281/zenodo.15021191
persistent identifier	https://treatment.plazi.org/id/03BCA619-FF07-D8F2-9733-F9B9FCF5FA3D
treatment provided by	Plazi (2025-03-03 10:25:10, last updated 2025-03-20 21:31:02)
scientific name	Euura nigriventris ( Holmgren, 1883 )
status

Treatment

298 Euura nigriventris ( Holmgren, 1883)

Fig. 312 View Figs 309–312

Nematus nigriventris Holmgren, 1883: 146 , pl. 2 fig. 10. Lectotype designated below.

Amauronematus varianus MacGillivray, 1919: 16 . Lectotype designated below. Synonymy by Smith (1979).

Pteronidea melanostoma Rohwer, 1920: 212–213 . Holotype ♀ (USNMENT00779223, USNM, http:// n 2t.net/ark:/65665/3cc28254b-6cc4-4fd9-bb98-5784f9f4262b), not examined. Type locality: USA, West Aleutians, Saint George Island. Synonymy by Smith (1979). Looks more like E. stordalensis or E. opacipleuris (5 mm).

Diagnosis

We have studied only two specimens (lectotype females of N. nigriventris and A. varianus ). Colouration (nearly completely black), size (6.5 mm), and lancet (short setae,?16–17 serrulae, serrulae with distinct cypsellae, long, weakly protruding, and with long basal extension) distinguish the species from the other Euura . Externally perhaps most easily confused with members of the E. viduata group.

Female

6.5 mm ( Lindqvist 1959a; MacGillivray 1919). Head black; antenna, labrum and clypeus black; thorax black, pronotum and tegula black; pterostigma brown; abdomen nearly completely black, valvifer 2 brown, valvula 3 black; metafemur black; tibiae and tarsi brown; antenna not reaching pterostigma; claws bifid; valvula 3 elongate, gradually tapering in dorsal view, and acute at apex; lancet with?16–17 serrulae.

Type material examined

Lectotype Nematus nigriventris , here designated

RUSSIA – Novaja Zemlya • ♀; Matotschkin Scharr [Matochkin Strait]; 73.3° N, 55.6° E; 1875; NHRS, NHRS-HEVA000006477 . GoogleMaps

Lectotype Amauronematus varianus , here designated

USA – Alaska • ♀; Camden Bay, West of Konganevik ; 70.02° N, 145.36° W; 27 Jun. 1914; F. Johansen leg.; CNC, CNC1057058 View Materials . GoogleMaps

Host plants

Unknown.

Genetics

COI

No data.

Nuclear No data.

Distribution and material examined

Holarctic. Specimens studied are from Russia and the USA.

References

Holmgren A. 1883. Insecta a viris doctissimis Nordenskiold illum ducem sequentibus in insulis Waigatsch et Novaja Semlia anno 1875 collecta. Hymenoptera et Diptera. Entomologisk Tidskrift 4 (3 - 4): 141-190. Available from https://www.biodiversitylibrary.org/page/36039769 [accessed 20 Nov. 2024].

Lindqvist E. 1959 a. Neue schwarze Pteronidea - Arten (Hym., Tenthr.). Notulae Entomologicae 39: 54-60.

MacGillivray A. D. 1919. The saw-flies (Tenthredinoidea) collected by the Canadian Arctic Expedition, 1913 - 18. Report of the Canadian Arctic Expedition 1913 - 18 3: 3-19. Available from https://www.biodiversitylibrary.org/page/38174946 [accessed 20 Nov. 2024].

Rohwer S. A. 1920. Descriptions of twenty-five new species of North American Hymenoptera. Proceedings of the United States National Museum 57 (2312): 209-231. https://doi.org/10.5479/si.00963801.2312.209

Smith D. R. 1979. Suborder Symphyta. In: Krombein K. V., Hurd, P. D. J., Smith D. R. & Burks B. D. (eds) Catalog of Hymenoptera in America North of Mexico. Volume 1, Symphyta and Apocrita (Parasitica): 3-137. Smithsonian Institution Press, Washington D. C. https://doi.org/10.5962/bhl.title.5074

Figures

Figs 309–312. Lancets of Euura Newman, 1837. 309. hyperborea (Thomson, 1871) ZMUO.041209. 310. salicis (Linnaeus, 1758) DEI-GISHym12532.311. imperfecta (Zaddach, 1876) DEI-GISHym11467. 312. nigriventris (Holmgren, 1883), lectotype, ♀ NHRS-HEVA000006477.