Subgenus Dinotrema Foerster, 1863, sensu stricto

Dinotrema Foerster, 1863: 268; Wharton 1980: 84; van Achterberg and Bin 1981: 104; van Achterberg 1988: 19; Chen and Wu 1994: 69; Wharton 2002: 56; Tobias 2003 a: 138; 2004: 468; 2006: 324: Peris-Felipo et al. 2014 a: 10; Yu et al. 2016; Peris-Felipo and Belokobylskij 2018 a: 4.

Pterusa Fischer, 1958: 14; van Achterberg and Vikberg 2014: 1, 3.

Type species.

Dinotrema erythropum Foerster, 1863, by original designation (Figs 14, 15).

Material examined

( Dinotrema (Dinotrema) erythropum): England: • 1 female (paratype of Aspilota praecipua) and 1 male (paratype id.), Coll. Marshall Cornwall, Botusfleming (HNHM) . Denmark: • 1 female, E-Jylland, Frisenborg, 28. vii. 1986 (Munk leg.) (NMA) . Finland: • 1 female, Sa. Valkeala, 6772: 483, 28. vii. 1977 (Koponen leg.) (NMA) ; • 1 female, same locality but, 29. vii. 1977 (NMA) . Hungary: • 1 female, Ugod, Somberek Hubertlak-Kórnyéle, 26–29. vi. 1967 (Papp leg.) (HNHM) . Luxembourg: • 2 females, Tratten, b. Murau Stmk . Coll Fulmek, 14. viii. 1942 and 13. x. 1954 (NHMW) . Netherlands: • 1 female, Wijster (Dr.) opposite Biological Station, 22–30. ix. 1975 (van Achterberg leg.) (RMNH) . Spain: • 1 female, Valencia, 16. vii. 1942 (NHMW) .

Diagnosis.

The main diagnostic characters of this subgenus are the short paraclypeal fovea which remain far from the eye margins, the pterostigma very narrow (linear) and vein 2 - SR of fore wing present and more or less completely sclerotised.

Remarks.

This is the largest subgenus including the main part of Dinotrema species with approx. 440 species described worldwide (Peris-Felipo and Belokobyslkij 2018 a). As shown by van Achterberg and Vikberg (2014), Pterusa Fischer, 1958 is a synonym of Dinotrema sensu stricto, because any differences are absent in females, and it is based only on the brachyptery of the males.