Leiinae (Edwards, 1925)

Kurina, Olavi & Grootaert, Patrick, 2016, Fungus gnats in the Botanical garden Jean Massart on the outskirts of Brussels: 52 new country records and a pictorial atlas of the genera (Diptera: Sciaroidea), Belgian Journal of Entomology 44, pp. 1-34 : 1-34

Leiinae

49. Docosia flavicoxa Strobl, 1900 – F. belg. sp. nov. – Fig. 6I

MATERIAL. 2♂♂, MT1 , 17-26. VI.2015; 3♂♂, MT1 , 26.VI-1.VII.2015 ; 4♂♂ 1♀, MT1 , 1- 8.VII.2015 ; 2♂♂, MT1 , 8-15.VII.2015 ; 1♂, MT2 , 26.VI-1.VII.2015 ; 1♂ 2♀♀, MT2 , 1- 8.VII.2015 ; 5♂♂ 1♀, MT2 , 8-15.VII.2015 ; 2♂♂ 2♀♀, MT2 , 15-22.VII.2015 ; 1♂, MT2 , 12- 20.VIII.2015 .

Total: 21♂♂ 6♀♀.

REMARKS. A not common European species with scattered distribution, recorded also from neighbouring countries except the Netherlands and Luxembourg ( KJAERANDSEN et al., 2007a; CHANDLER, 2013).

50. Docosia gilvipes (Haliday in Walker, 1856)

MATERIAL. 1♂, MT1 , 21-28. V.2015; 1♀, MT1 , 28.V-4. VI.2015; 1♂, MT1 , 17.XII.2015 - 6.I.2016 ; 1♂ 3♀♀, MT2 , 7-13. V.2015; 1♀, MT2 , 21-28. V.2015; 1♀, MT2 , 28.V-4. VI.2015; 1♀, MT2 , 10- 17. VI.2015; 1♂ 1♀, MT2 , 26. VI -1.VII.2015; 1♂, MT2 , 8-15.VII.2015 ; 1♂, MT2 , 15-22.VII.2015 ; 1♂, MT2 , 6-12.VIII.2015 ; 2♀♀, MT2 , 12-20.VIII.2015 ; 2♂♂ 1♀, MT2 , 10-17.IX.2015 ; 1♀, MT2 , 17-24.IX.2015 ; 1♂, MT2 , 24.IX -1.X.2015 ; 1♂ 1♀, MT2 , 20-30.X.2015 ; 3♂♂ 1♀, MT2 , 30.X-12.XI.2015 ; 1♂, MT2 , 12.XI-3.XII.2015 ; 1♂ 3♀♀, MT2 , 17.XII.2015 - 6.I.2016 ; 1♀, MT2 , 6- 21.I.2016 ; 1♀, MT2 , 3-17.II.2016 ; 1♂, MT2 , 17.II-3.III.2016 ; 1♀, MT2 , 1-8.IV.2016 ; 1♂, MT2 , 29.IV-4. V.2016; 1♀, MT2 , 6-11. V.2016.

Total: 18♂♂ 21♀♀.

51. Docosia sciarina (Meigen, 1830)

MATERIAL. 1♂, MT1 , 21-29.IV.2016 ; 1♂, MT2 , 8-14.IV.2016 . Total: 2♂♂.

52. Clastobasis loici Chandler, 2001 – F. belg. sp. nov. – Fig. 6F

MATERIAL. 1♂, MT1 , 17-26. VI.2015; 2♂♂ 1♀, MT1 , 1-8.VII.2015 ; 1♀, MT1 , 12-20.VIII.2015 ; 1♀, MT2 , 26.VI-1.VII.2015 ; 1♀, MT2 , 4-10.IX.2015 ; 1♀, MT2 , 1-9.X.2015 .

Total: 3♂♂ 5♀♀.

REMARKS. The species was recently described in both sexes by material from Switzerland, Jersey (Channel Islands) and Czech Republic ( CHANDLER, 2001b), and subsequently recorded from Hungary ( ŠEVČÍK & PAPP, 2002). In addition, there are unpublished records from Georgia suggesting its wider distribution in the Western Palaearctic (KURINA, in prep.). Morphologically, C. loici is close to the widely distributed Palaearctic congener C. alternans (Winnertz, 1863) , and is reliably distinguishable by structure of male and female terminalia only.

53. Ectrepesthoneura hirta (Winnertz, 1846) – Fig. 6D

MATERIAL. 1♂, MT1 , 10-17. VI.2015; 1♂, MT1 , 26.VI-1.VII.2015 ; 3♂♂ 2♀♀, MT2 , 7- 13. V.2015; 1♂, MT2 , 13-21. V.2015; 1♀, MT2 , 21-28. V.2015; 1♂ 1♀, MT2 , 28.V-4. VI.2015; 1♂, MT2 , 15-22.VII.2015 ; 3♂♂, MT2 , 21-29.IV.2016 ; 6♂♂, MT2 , 29.IV-4. V.2016; 1♂, MT2 , 6- 11. V.2016.

Total: 18♂♂ 4♀♀.

54. Greenomyia mongolica Laštovka & Matile, 1974 – F. belg. sp. nov. – Fig. 6E

MATERIAL. 1♀, MT1 , 30.X-12.XI.2015 ; 1♀, MT2 , 1-9.X.2015 . Total: 2♀♀.

REMARKS. Having been described from Mongolian material ( LAŠTOVKA & MATILE, 1974), the species has been subsequently widely recorded in Europe and found also in Russian Far East ( KURINA et al., 2011 see references therein). All known European specimens are collected after 1980, suggesting the possible invasive distribution of the species. Because G. mongolica is a distinctive, considerably large and brightly coloured species (see Fig. 3E ), it’s not likely to have been totally overlooked during active fungus gnats’ studies in Europe before 1980’s.

55. Leia winthemii Lehmann, 1822 – Fig. 6H

MATERIAL. 1♂ 1♀, MT1 , 8-15.VII.2015 ; 1♂, MT1 , 30.X-12.XI.2015 ; 1♂, MT1 , 3.XII.2015 ; 1♀, MT2 , 13-21. V.2015; 1♀, MT2 , 4-10. VI.2015; 1♀, MT2 , 1-9.X.2015 . Total: 3♂♂ 4♀♀.

12.XI-56. Megophthalmidia crassicornis (Curtis, 1837) – F. belg. sp. nov. – Fig. 6G

MATERIAL. 1♂, MT1 , 20-27.VIII.2015 ; 1♀, MT2 , 4-10. VI.2015.

Total: 1♂ 1♀.

REMARKS. A not common European species with mainly western distribution, recorded also from neighbouring countries except Luxembourg ( CHANDLER, 2013).

Figures

Fig. 6. Habitus of fungus gnats of the family Mycetophilidae. A – Saigusaia flaviventris; B – Synapha fasciata; C – Tetragoneura sylvatica; D – Ectrepesthoneura hirta; E – Greenomyia mongolica; F – Clastobasis loici; G – Megophthalmidia crassicornis; H – Leia winthemii; I – Docosia flavicoxa; J – Brevicornu proximum; K – Anatella simpatica; L – Cordyla fissa; M – Allodia (Allodia) lugens.

Fig. 3. Fluctuation of species diversity during the whole collecting period. The dotted line separates two more diverse periods. Blue line indicates results from MT1, red line from MT2 and green line summarizes collecting with both traps. Numbers of the outer circle represent these of the subsequent samples.