Euura sordidiapex (Lindqvist, 1959)

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 : 76-77

130 Euura sordidiapex (Lindqvist, 1959)

Figs 130 , 360

Pteronidea sordidiapex Lindqvist, 1959c: 57 .

Pteronidea aspera Lindqvist, 1959c: 58 . Syn. nov.

Diagnosis

Females are most similar to E. leptostigma , see discussion under that species. Male penis valve of E. sordidiapex (with smaller valvispina and paravalva similarly broad basally and apically) is slightly different from E. leptostigma and similar species (valvispina larger and paravalva apically broader than basally).

Female

5.5–6.0 mm. Head black or slightly pale around eyes; labrum pale; clypeus black to pale; supraclypeal area black; thorax black; pronotum and tegula black or slightly pale; pterostigma pale; metafemur pale or slightly black; metatibia pale; hind tarsus pale or brown; abdomen nearly completely black; terga 9–10, valvifer 2, and cerci pale; valvula 3 pale or brown with black margins; mesepisternum slightly matt; claws bifid; valvula 3 in dorsal view narrow and apically acute.

Male

4.5–5.5 mm. Head black; labrum pale; clypeus black or slightly pale; supraclypeal area black; thorax black; pronotum black; tegula black; pterostigma pale; metafemur mostly pale; metatibia pale; hind tarsus pale or brown; abdomen black; sternum 9 pale; mesepisternum smooth or slightly matt; claws bifid.

Type material examined

Holotype Pteronidea sordidiapex

FINLAND – Lapin Lääni • ♀; Kilpisjärvi; 69.04° N, 20.81° E; 2 Jul. 1950; E. Lindqvist leg.; MZH, http://id.luomus.fi/GL.3591.

Notes

Mesepisternum matt. Best morphological match: DEI-GISHym12536.

Holotype Pteronidea aspera

FINLAND – Lapin Lääni • ♀; Saana; 69.05° N, 20.85° E; 23 Jun. 1938; A. Nordman leg.; MZH, http://id.luomus.fi/GL.3561.

Notes

Mesepisternum slightly matt. Best morphological match: DEI-GISHym12536 (externally almost identical).

Hosts plants

Betula nana L. and B. pubescens .

Genetics

COI

Based on 12 specimens, maximum within-species distance is 3.65% and the nearest neighbours, diverging by a minimum of 0%, are Euura leucopyga and E. parviserrata .

Nuclear

Based on 11 specimens, maximum within-species distance is 0.53% (0.59% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.44%, is Euura sulciceps .

Distribution and material examined

Palaearctic. Specimens studied are from Finland, Norway, and Sweden.

Figures

Figs 130–133. Lancets of Euura Newman, 1837. 130. sordidiapex (Lindqvist, 1959) DEI- GISHym12536. 131. leptostigma (Lindqvist, 1958) DEI-GISHym12621. 132. polaris (Holmgren, 1883) DEI-GISHym12056. 133. polepso Prous & Mutanen sp. nov., holotype, ♀ ZMUO.059303.

Figs 352–365. Penis valves ofEuura Newman, 1837. 352. leptostigma (Lindqvist, 1958)ZMUO.059783. 353. leptostigma ZMUO.067450.354. parviserrata (Lindqvist, 1944) ZMUO.031499.355. parviserrata DEI-GISHym83822. 356. polaris (Holmgren, 1883) DEI-GISHym12040. 357. sulciceps (Lindqvist, 1959) DEI-GISHym84188. 358. polepso Prous & Mutanen sp. nov., paratype ZMUO.059951. 359. mimus (Konow, 1903) ZMUO.035273. 360. sordidiapex (Lindqvist, 1959) DEI-GISHym12185. 361. punctifrons (Malaise, 1921) DEI-GISHym84261. 362. fuscodorsata (Lindqvist, 1949) comb. nov. ZMUO.035607. 363. parvilabris (Thomson, 1863) DEI-GISHym80108. 364. poppii (Konow, 1904) comb. nov. ZMUO.030843. 365. uda (Holmgren, 1883) DEI-GISHym84183.