Dmitry Gavryushin wrote:
Hi Jozef,

I'm afraid there is still no key for identification of all Palearctic spp. A quick check at Fauna Europaea makes me believe that what's listed below contains diagnoses of almost all of the European spp., moreover, the majority of these are available online fo free. Of course the list is not exhaustive by far...

Bezzi (1913) Thaumaleidi (Orfnefilidi) italiani - Boll. Lab. Zool. gen. agr. Portici 7: 227-266
Edwards (1929) A revision of the Thaumaleidae (Dipt.) - Zool. Anz. 82: 121-142
Joost (1978) Beitrag zur Dunkelmücken-Fauna Bulgarien - Ent. Nachr. 7: 118-121
Joost (1979) Thaumalea martinovskyi n. sp. aus dem Kaukasus - Ent. Nachr. 6: 89-92.
Martinovský & Rozkošný (1976) Four new species of Thaumaleidae (Diptera) from Europe with taxonomic and distributional notes on other species - Acta ent. bohemoslov. 73: 187-205
Schmid (1951) Notes sur quelques thaumaléides suisses et espagnols (Diptera, Nematocera) - Bulletin of the Royal Belgian Institute of Natural Sciences 27 (40): 1-6
Schmid (1958) Quelques dipteres nematoceres noveaux ou interessants (Thaumaleides et Limnobiides) - Bulletin of the Royal Belgian Institute of Natural Sciences 34 (10): 1-23
Tjeder (1949) The first Swedish representative of the family Thaumaleidae (Dipt. Nemat.) - Opusc. ent. 14: 106-109
Vaillant (1960) A new Thaumaleid (Diptera) from Madeira - Bolm Museum munic. Funchal 17: 25-28
Vaillant (1968) Les diptères Thaumaleidae des Pyrénées - Annales de Limnologie 4 (1):81-84
Vaillant (1969) Les Diptères Thaumaleidae des Alpes et des Carpathes - Annls Soc. ent. Fr. (N.S.) 5: 687-705
Vaillant (1977) Les Diptères Thaumaleidae d'Europe - Annls. Soc. ent. Fr. (N. S.) 13 (4), 695-710
Vaillant (1981) Some Diptera Thaumaleidae from Europe - Aquat. Ins. 3 (3): 129-146
Vaillant & Vinçon (1986) Thaumalea angelieri n. sp., Diptère Thaumaleidae nouveau des Pyrénées - Annls Limnol. 22 (1): 65-68
Vaillant & Vinçon (1988) Une espèce nouvelle de Diptères Thaumaleidae d'Espagne - L'Entomologiste, 44 (5): 281-285
Wagner (1980) Notes on some Thaumaleidae (Diptera) from southeast Europe - Aquatic Insects, 2 (1), 13-17
Wagner (1981) Thaumaleiden aus dem Mittelmeergebiet - Spixiana 4: 143-152
Wagner (1986) Notes on Thaumaleidae (1). Thaumalea dentata Edwards, a synonym of Thaumalea inflata Bezzi - Aquatic Insects, 8 (2), 70
Wagner (1986) Notes on Thaumaleidae (2). Redescription of Thaumalea libanica Edwards (1932) - Aquatic Insects, 8 (2), 82
Wagner (1987) Neue Thaumaleidennachweise aus dem Mittelmeerraum, nebst Beschreibung zweier neuer Arten (Diptera, Thaumaleidae) – Nachrichtenblatt der Bayerischen Entomologen 36: 17-21
Wagner (1988) Notes on Thaumaleidae (3) Thaumalea similis sp.n. - Aquatic Insects, 10 (4), 84
Wagner (1992) Notes on Thaumaleidae (4), Thaumalea horvati sp.n. - Aquatic Insects, 14 (4), 212
Wagner (1997) Notes on Thaumaleidae (5), Thaumalea rivosecchii sp. n., a New Thaumaleid (Diptera) from Central Italy - Aquatic Insects, 19 (3), 183-184
Wagner & Bellstedt (2015) Thaumaleidae (Diptera) collected by the late Dr. W. Joost in the Caucasus Mountains - Zootaxa, 4039 (3), 483-488
Zilahi-Sebess (1955) Neue Nematoceren (Diptera) aus dem Karpatenbecken - Acta zool. hung. 2 (4): 433-440