Hydromyza Fallén, 1823

Ozerov, A. L. & Krivosheina, M. G., 2023, Contribution to the fauna of dung flies (Diptera: Scathophagidae) of Russia with a key to genera and a checklist of the Russian Scathophagidae, Russian Entomological Journal 32 (1), pp. 95-122 : 105-107

Genus Hydromyza Fallén, 1823

Figs 21 , 22 , 62 , 83, 84, 115 .

DIAGNOSIS. Medium-sized flies (6–9 mm long). Head with ocellar setae absent; orbital setae very short ( Figs 21 , 115 ). Proepisternum is covered with hairs at middle or in anterior part. Anepisternum covered with setulae usually along dorsal margin and in posterior part only, without setulae posterior to anterior spiracle. Katepisternum with one strong seta in upper posterior corner. Postmetacoxal bridge abesent. Male sternites 4 and 5, epandrium, cerci and surstyli as in Figs 62 , 83, 84.

REMARKS. Hydromyza includes two species in the World: one is Palaearctic, the second species is Nearctic. Palaearctic species, H. livens (Fabricius, 1794) , is known in Russia from European part [ Gorodkov, 1970, 1986]. It is a widespread species that lives in reservoirs almost everywhere where Nuphar lutea (Linnaeus) grows, the leaves of which are mined by H. livens larvae.

R Sc 1 R

51

R4+5

53

1

2

56

R1

58

Figures

Figs 19–21. Head of Scathophagidae, lateral view (19, 20) and dorsolateral view (21): 19 — Spaziphora hydromyzina (Fallén); 20 — Trichopalpus nearcticus (Vockeroth); 21 — Hydromyza livens (Fabricius). Рис. 19–21. Голова Scathophagidae, сбоку (19, 20) и дорсолатерально (21): 19 — Spaziphora hydromyzina (Fallén); 20 — Trichopalpus nearcticus (Vockeroth); 21 — Hydromyza livens (Fabricius).

Figs 22–27. Fragments of thorax of Scathophagidae: 22 — Hydromyza livens (Fabricius), anepisternum; 23 — Trichopalpus fraternus (Meigen), anepisternum; 24 — Scathophaga litorea (Fallén), anepisternum; 25 — Cleigastra flavipes (Fallén), anepisternum and katepisternum; 26 — Cleigastra arctica (Becker), anepisternum and katepisternum; 27 — Trichopalpus punctipes (Meigen), anepisternum and katepisternum. Abbreviations: a kepst s — anterior katepisternal seta; anepst — anepisternum; kepst — katepisternum; lp kepst s — lower posterior katepisternal seta; prepst — proepisternum; up kepst s — upper posterior katepisternal seta. 24 — after Ozerov & Krivosheina, 2021, fig. 6; 25 — after Ozerov & Krivosheina, 2015, fig. 1. Рис. 22–27. Фрагменты груди Scathophagidae: 22 — Hydromyza livens (Fabricius), анЭпистерн; 23 — Trichopalpus fraternus (Meigen), анЭпистерн; 24 — Scathophaga litorea (Fallén), анЭпистерн; 25 — Cleigastra flavipes (Fallén), анЭпистерн и катЭпистерн; 26 — Cleigastra arctica (Becker), анЭпистерн и катЭпистерн; 27 — Trichopalpus punctipes (Meigen), анЭпистерн и катЭпистерн. ОбоЗначениЯ: a kepst s — переднЯЯ катЭпистернальнаЯ Щетинка; anepst — анЭпистернум; kepst — катЭпистернум; lp kepst s — нижнЯЯ ЗаднЯЯ катЭпистернальнаЯ Щетинка; prepst — проЭпистернум; up kepst s — верхнЯЯ ЗаднЯЯ катЭпистернальнаЯ Щетинка. 24 — по Ozerov & Krivosheina, 2021, fig. 6; 25 — по Ozerov & Krivosheina, 2015, fig. 1.

Figs 61–67. Male sternites 4 (lower) and 5 (upper) of Scathophagidae: 61 — Ernoneura argus (Zetterstedt); 62 — Hydromyza livens (Fabricius); 63 — Leptopa filiformis Zetterstedt; 64 — Megaphthalma pallida (Fallén, 1819); 65 — Megaphthalma unilineata (Zetterstedt); 66 — Staegeria kunzei (Zetterstedt); 67 — Scatomyza magnipennis (Portschinsky). Рис. 61–67. Стерниты 4 (вниЗу) и 5 (вверху) самцов Scathophagidae: 61 — Ernoneura argus (Zetterstedt); 62 — Hydromyza livens (Fabricius); 63 — Leptopa filiformis Zetterstedt; 64 — Megaphthalma pallida (Fallén); 65 — Megaphthalma unilineata (Zetterstedt); 66 — Staegeria kunzei (Zetterstedt); 67 — Scatomyza magnipennis (Portschinsky).

Figs 112–117. Habitus of Scathophagidae: 112 — Neochirosia veratri (Hendel); 113 — Ernoneura argus (Zetterstedt); 114 — Gimnomera tarsea (Fallén); 115 — Hydromyza livens (Fabricius); 116 — Leptopa filiformis Zetterstedt; 117 — Megaphthalma pallida (Fallén). 114 — after Ozerov, 2019a, fig.1. Рис. 112–117. ОбЩий вид Scathophagidae: 112 — Neochirosia veratri (Hendel); 113 — Ernoneura argus (Zetterstedt); 114 — Gimnomera tarsea (Fallén); 115 — Hydromyza livens (Fabricius); 116 — Leptopa filiformis Zetterstedt; 117 — Megaphthalma pallida (Fallén). 114 — по Ozerov, 2019a, fig.1.