Drymeia Meigen, sp. nov.
Creators: name: Sorokina, Vera S.
name: Pont, Adrian C.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Anthomyiidae
Drymeia

description: Key to the Russian species of Drymeia Meigen
To facilitate comparison, the following species have been included in the key although they are not actually known from Russia: D. brumalis (Rondani, 1866), D. cantabrigensis (Huckett, 1965), D. gymnophthalma (Hennig, 1963), D. similis (Malloch, 1918).
Males
1. Prealar seta present and strong........................................................................... 2 - Prealar seta absent or weak and short, shorter than 2nd notopleural seta.......................................... 19 2. 4 postsutural dorsocentral setae........................................................................... 3 - 3 postsutural dorsocentral setae.......................................................................... 12 3. Eyes densely haired. Proboscis short. Parafacial a little narrower than postpedicel................... vicana (Harris) (part) - Eyes bare. Proboscis slender and elongate. Parafacial broader than or equal to width of postpedicel..................... 4 4. Parafacial much broader than width of postpedicel, almost twice as wide as width of postpedicel. Larger species, at least 6.5 mm long. Figs. 3 E, D, 16F. ............................................................................. 5 - Parafacial equal to or only slightly broader than width of postpedicel. Smaller species, less than 6 mm long. Figs. 2 A, 19A.. 7 5. Frons with a broad black frontal vitta, eyes separated by more than width of postpedicel. Fore metatarsus without an apical ventral spur. Mid metatarsus with the ventral spinules longer than tarsal depth. Apical posteroventral seta on hind tibia absent. Fore and mid coxae with long wavy setae. Fig. 12 .......................................... longiseta sp. nov. (part) - Frons without a broad frontal vitta, fronto-orbital plates touching or rarely separated by a very narrow frontal vitta. Fore metatarsus with an apical ventral spur (Fig. 16 E). Mid metatarsus with the ventral spinules shorter than tarsal depth. Fore and mid coxae without such setae................................................................................6 6. Mid femur with a row of strong anteroventral setae and with 2–3 long and strong ventral setae at apex. Mid tibia without anterior setae or with very weak short setae on apical half. Hind tibia with a small apical prong. Hind femur without a row of posteroventrals, with only a few short posteroventrals on apical half. Figs. 16 A–F.................... quadrisetosa (Malloch) - Mid femur with only a row of strong anteroventral setae, without strong ventral setae at apex. Mid tibia with rows of strong anterodorsal and anteroventral setae. Hind tibia without an apical prong. Hind femur with a full row of long posteroventrals. Figs. 3 A–C....................................................................... alpicola (Rondani) (part) 7. Mid femur without any long setae........................................................... .. similis (Malloch) - Mid femur with long antero- and posteroventral setae.........................................................8 8. Mid femur with anteroventral setae restricted to a group of 5–6 setae on apical fifth, with a row of long posterior setae on apical 1/2 and with long posteroventral setae on basal 2/3. Hind femur without posteroventrals, only with fine posterior setae at base. Figs. 6 A–C........................................................................ fasciculata (Stein) - Mid femur with rows of fine anteroventral and posteroventral setae, without long posterior setae. Hind femur with a dense row of posteroventrals..................................................................................... 9 9. Body shining black, without dusted markings. Mid femur with a row of fine and relatively short anteroventral setae and 4–5 stronger setae on apical 1/3; with long posteroventral setae only on basal half. Figs. 7 A–F................ glabra sp. nov. - Abdomen and scutum black with grey dusted markings. Mid femur with rows of equally long, dense, antero-, postero- and ventral setae, without strong setae on apical part; with long posteroventral setae on basal 3/4......................... 10 10. Arista appearing almost bare, the longest hairs shorter than its basal diameter. Facial edge little projecting forward beyond the level of profrons. Fore tibia with 4–5 fine posteroventrals and sometimes 1–4 fine posterodorsals. Mid tibia with 4 anterodorsal setae. Figs. 19 A–H....................................................................... taymirensis sp.n. - Arista pubescent, the longest hairs longer than its basal diameter. Facial edge not projecting forward beyond the level of profrons. Fore tibia with 2 strong posteroventrals and without posterodorsals. Mid tibia with 1 anterodorsal seta on apical third......................................................................................................11 11. Longest aristal hairs slightly longer than basal diameter of arista. Viewed from behind, tergites 3–5 with a narrow undusted median vitta, and the dusted areas with brownish dust. Fronto-orbital plates touching. Fig. 2 .......... aristata sp. nov. (part) - Longest aristal hairs twice as long as basal diameter of arista. Viewed from behind, tergites 3–5 with an indistinct, broad median vitta, and the narrow dusted areas with grey dust. Fronto-orbital plates separated by a very narrow frontal vitta. Middle Asia. Figs. 6 G–I.................................................................. gymnophthalma (Hennig) 12. Labella of proboscis rather long, slender, strongly sclerotized and normally doubled back................ hamata (Fallén) - Proboscis normal, labella stout and cushion-like, not sclerotised................................................ 13 13. Parafacial much broader than width of postpedicel, almost twice as wide as width of postpedicel. Larger species, at least 6.5 mm long............................................................................................ 14 - Parafacial equal to or slightly broader than width of postpedicel. Smaller species, less than 6.3 mm long................15 14. Frons with a broad black frontal vitta, eyes separated by more than width of postpedicel. Fore metatarsus with or without a very small apical ventral spur. Mid metatarsus with the ventral spinules longer than tarsal depth. Apical posteroventral seta on hind tibia absent. Fore and mid coxae with long wavy setae. Figs. 12 ........................... longiseta sp. nov. (part) - Frons without a broad frontal vitta, fronto-orbital plates touching or rarely separated by a very narrow frontal vitta. Fore metatarsus with a distinct apical ventral spur. Mid metatarsus with the ventral spinules shorter than tarsal depth. Apical posteroventral seta on hind tibia present, long. Fore and mid coxae without long wavy setae................ alpicola (Rondani) (part) 15. Frons with a broad black frontal vitta (Fig. 18 E). Hind tibia with a long apical posteroventral seta. Hind femur with a row of short weak posteroventral setae. Figs. F–H....................................................... tetra (Meigen) - Frons without a broad frontal vitta, fronto-orbital plates touching. Hind tibia with or without a very short apical posteroventral seta................................................................................................ 16 16. Hind femur without posteroventral setae, at most with a few weak setae on apical 1/4; mid femur with separated rows of antero- and posteroventral setae, without dense ventral setae. Viewed from behind, tergite 3 with a broad undusted trapezoidal patch, tergite 4 with smaller triangular undusted patch, and tergite 5 with an undusted median vitta......................... 17 - Hind and mid femora with rows of long, dense, fine posteroventral and ventral setae. Abdomen without undusted triangular or trapezoidal patches, at most with an undusted median vitta.................................................... 18 17. Mid femur with a row of equal anteroventral setae; with very long posteroventrals on basal 2/3, 2–2.5 times as long as depth of femur. Mid tibia with 1–2 anterodorsals. Hind tibia with a small apical prong and a short apical posteroventral seta. Hind femur at most with a few weak posteroventral setae on apical 1/4 and weak posterior setae at base. Figs. 20 ....... .. triseta sp. nov. - Mid femur with a row of unequal anteroventral setae, with 4–5 longer stronger setae on apical 2/3 which are situated below other fine anteroventral setae; with a row of relatively short posteroventrals, 1–1.5 times as long as depth of femur. Mid tibia without anterodorsals, rarely with 1 short seta on apical 1/3. Hind tibia without an apical prong or apical posteroventral seta. Hind femur without posteroventral setae but with weak posterior setae at base. Figs. 6 D–F............. firthiana (Huckett) 18. Viewed from behind, tergites 3–5 with a narrow undusted median vitta, and the dusted areas with brownish dust. Facial edge not projecting forward beyond the level of profrons. Wings dark brown. Siberia. Figs. 2 ............. .. aristata sp. nov. (part) - Abdomen subshining black. Facial edge little projecting forward beyond the level of profrons. Wings pale brown. Europe........................................................................................ .. brumalis (Rondani) 19. Eyes densely haired................................................................................... 20 - Eyes bare or with very short fine hairs....................................................................... 21 20. All tarsomeres brownish-yellow, and mid tarsomeres 2–3 dilated. Tip of abdomen with a brush of slender black setulae and setae, caudally directed. Larger species, at least 9 mm long....................................... .. sibirica (Hennig) - All tarsomeres black, and mid tarsomeres 2–3 not dilated. Tip of abdomen without such a brush of setulae and setae. Smaller species, less than 8 mm long............................................................. vicana (Harris) (part) 21. Arista plumose. Notopleuron bare. Small grey flies, 4.1–4.4 mm long. Figs. 14 ......................... phaonina sp. nov. - Arista bare or short pubescent. Notopleuron haired. Larger flies, at least 4.6 mm long............................... 22 22. Anepimeron setulose.................................................................................. 23 - Anepimeron bare..................................................................................... 26 23. Fore coxa prolonged into a knob-like structure at apex. Figs. G–K................................. segnis (Holmgren) - Fore coxa not prolonged at apex......................................................................... 24 24. Tip of abdomen with a dense brush of slender black setae and setulae, caudally directed. Mid tibia without anterodorsals.. 25 - Tip of abdomen without such brush of setae and setulae, at most with several caudally directed setulae on hypopygium. Mid tibia with 1–2 anterodorsals. Figs. 8 ........................................................... grandis sp. nov. 25. Mid femur with a group of 6–8 long curved anteroventral setae on apical third, several of them twice as long as femoral depth. Eye bare. Fronto-orbital plates separated by a conspicuous frontal vitta, the frons at narrowest point as broad as width of postpedicel (in frontal view). Hind tibia with an apical posteroventral seta. Figs. 3 F–K................... chillcotti (Huckett) - Mid femur with only a few short anteroventral setae on apical third, none as long as femoral depth. Eye very short haired. Fronto-orbital plates touching. Hind tibia without an apical posteroventral seta. Figs. 4 ................. cilitarsis sp. nov. 26. Outer claw of fore tarsus broadly flattened, leaf-like and twisted. Facial edge long projecting forward beyond the level of profrons. Mid femur with a complete series of dense anteroventral setae, commencing at base. Figs. 11 F–K....................................................................................................... pribilofensis (Malloch) - Outer claw of fore tarsus not modified in shape. Facial edge little projecting forward beyond the level of profrons. Mid femur without a continuous series of equally long anteroventral setae (except in unica)................................... 27 27. Scutum with two pairs of long strong presutural acrostichal setae. Mid femur straight, with a row of fine dense anteroventral setae. Hind femur with long, dense but weak posteroventrals on basal 3/4. Hind tibia with a short apical posteroventral seta. Figs. 1 A–F.......................................................................... acrostichalis sp. nov. - Presutural acrostichals setulose, dense and all hair-like. Mid femur a little curved ventrally, without a row of fine dense anteroventral setae. Hind femur without posteroventrals, with only weak posterior setae on basal half. Hind tibia without an apical posteroventral seta.............................................................................. 28 28. Mid femur with the anteroventral setae restricted a tuft of long apical wavy setae on apical 1/4. Hind tibia without an apical prong. Eye with very short sparse hairs. Figs. 15 .............................................. puchokana sp. nov. - Mid femur without such a tuft of setae on apical 1/4. Hind tibia with an apical prong. Eye bare....................... 29 29. Hind tibia with an enlarged and elongated apical ventral prong which, at widest diameter, is about equal to the width of hind tibia at middle. Mid femur with restricted series of rather long setae on distal third of anteroventral surface and with several long posterior setae on basal ¼. Figs. 11 A–E..................................................... groenlandica (Lundbeck) - Hind tibia with the maximum width of the apical ventral prong less than width of tibia at middle. Mid femur without anteroventral setae on apical part, or if present no longer than depth of femur................................................ 30 30. Fronto-orbital plates separated by a black frontal vitta. Fore tarsomere 1 without long posteroventral setulae at apex. Hind femur with rows of short weak posteroventral and posterior setae on basal half...................... neoborealis (Snyder) - Fronto-orbital plates touching. Fore tarsomere 1 with 2–6 relatively long posteroventral setulae at apex. Hind femur without posteroventral setae but with fine posterior setae near base.................................................... 31 31. Mid femur without a group or comb of setae, only with series of long curled setae on proximal third of anteroventral surface; with 1 or 2 erect ventral spines at middle which are about half as long as diameter of femur. North Canada ................................................................................................. cantabrigensis (Huckett) - Mid femur with a group or comb of long strong setae on basal half; without or with 2–4 very short ventral spinules which are much less than diameter of femur. Siberia................................................................. 32 32. Mid femur with a group of slender curved setae at extreme base of anteroventral surface. Facial edge not or little projecting forward beyond the level of profrons..................................................................... 33 - Mid femur without setae at extreme base of anteroventral surface, only with a comb of strong long setae on middle part. Facial edge little projecting forward beyond the level of profrons. Figs. 5 ................................... cristata sp. nov. 33. Abdomen darker: syntergite 1+2 entirely dark, tergites 3–5 with a dark middle stripe that sometimes extends laterally along margins of tergites. Scutum black, almost without dust. Hind tibia on basal third with anterodorsal setae that are as long as or longer then tibial depth. Mid femur with 1–2 short ventral spinules on basal third. Figs. 17 ............ .. setibasis (Huckett) - Abdomen lighter: tergite 1+2 entirely or with one half dusted like the other tergites, tergites 3–5 each with a narrow dark middle stripe that does not extend laterally along margins of tergites. Scutum with an elongated-triangular mark of pale dust in front of scutellum and with pale dust along lateral margins of scutum (viewed from behind). Hind tibia on basal third with anterodorsal setae shorter then tibial depth. Mid femur with 3–4 short ventral spinules at middle. Figs. 10 ..... grisea sp. nov.
Females
The following species are not included in the key as their females are not known: D. cilitarsis sp. nov., D. phaonina sp. nov., D. puchokana sp. nov., or have not been recognized: D. gymnophthalma (Hennig, 1963).
1. Prealar seta present and strong........................................................................... 2
- Prealar seta absent or weak, short, shorter than 2nd notopleural seta............................................. 15
2. 4 postsutural dorsocentral setae........................................................................... 3
- 3 postsutural dorsocentral setae...........................................................................9
3. Grey species, scutum with 4 brown vittae. Eye with very short thin hairs. Proboscis short. Parafacial a little narrower than post- pedicel................................................................................... vicana (Harris)
- Black species. Eye bare. Proboscis slender and elongate. Parafacial as broad as or broader than width of postpedicel....... 4
4. Parafacial much broader than width of postpedicel, almost twice as wide as width of postpedicel. Hind tibia with a long strong apical posteroventral seta. Larger species, 6.2–9.5 mm ........................................................ 5
- Parafacial equal to or slightly broader than width of postpedicel. Hind tibia without a long strong apical posteroventral seta. Smaller species, less than 6.4 mm long..................................................................... 7
5. Viewed in profile, height of head greater then its length (fig. 3E). Mid tarsomere 1 with the ventral spinules as long as or at least half as long as tarsal depth. Cross-vein dm-cu sinuous, S-shaped, rarely almost straight. Fig. 13 A.... longiseta sp. nov. (part)
- Viewed in profile, height of head as long as or shorter than its length (fig. 3D). Mid tarsomere 1 with the ventral spinules less than half of tarsal depth. Cross-vein dm-cu straight........................................................... 6
6. Veins of basal region of wing except costa yellowish to pale brown............................ quadrisetosa (Malloch)
- Veins of basal region of wing dark brown to blackish...................................... alpicola (Rondani) (part)
7. Mid femur with rows of equal hair-like antero-, postero- and ventral setae, hind femur with a row of weak posteroventrals............................................................................................. taymirensis sp.n.
- Mid femur without rows of long hair-like setae, only with 1–2 strong setae on basal quarter and 3–4 strong setae on apical third; posteroventral surface with 1–3 setae on basal quarter....................................................8
8. Notopleuron with several short setulae. Wing yellowish, pale at base, with yellow veins. Abdomen and scutum black with grey-dusted marks....................................................................... fasciculata (Stein)
- Notopleuron bare or with isolated hairs around posterior notopleural. Wing brownish, dark at base, with black veins. Body shining black, without dusted marks............................................................ glabra sp. nov.
9. Labella of proboscis rather long, slender, strongly sclerotized and normally doubled back................ hamata (Fallén)
- Proboscis normal, labella stout and cushion-like, not sclerotised................................................ 10
10. Parafacial much broader than width of postpedicel, almost twice as wide as width of postpedicel. Hind tibia with a long strong apical posteroventral seta. Larger species, 6.2–9.5 mm ....................................................... 11
- Parafacial equal to or slightly broader than width of postpedicel. Hind tibia without a long strong apical posteroventral seta (except in similis). Smaller species, less than 6.2 mm long.................................................... 12
11. Viewed in profile, height of head greater than its length (fig. 3E). Mid tarsomere 1 with the ventral spinules as long as tarsal depth or half of this. Cross-vein dm-cu sinuous, S-shaped, rarely almost straight.................. longiseta sp. nov. (part)
- Viewed in profile, height of head equal to or less than its length (fig. 3D). Mid tarsomere 1 with the ventral spinules less than half as long as tarsal depth. Cross-vein dm-cu straight...................................... alpicola (Rondani) (part)
12. Frontal vitta without setae.................................................................... tetra (Meigen)
- Frontal vitta with a pair of crossed setae.................................................................. 13
13. Hind tibia with a long strong apical posteroventral seta........................................... similis (Malloch)
- Hind tibia without a long strong apical posteroventral seta.................................................... 14
14. Body subshining black. Facial edge not projecting forward beyond the level of profrons. Wings brown at base. Europe.......................................................................................... .. brumalis (Rondani)
- Body brownish dusted, sometimes with an olive tinge (figs. 21A, B). Facial edge projecting forward on slightly beyond the level of profrons. Wings yellow at base............................... .. aristata sp. nov., triseta sp. nov., firthiana (Huckett)
15. Anepimeron setulose.................................................................................. 16
- Anepimeron bare..................................................................................... 19
16. Mid femur with a strong anteroventral seta on apical half, as strong as or stronger than anteroventrals at base...................................................................................................... chillcotti (Huckett)
- Mid femur without or with only a short weak anteroventral seta on apical half..................................... 17
17. Brownish-grey dusted species; scutum with 4 black vittae. Facial edge projecting slightly forward beyond the level of profrons. Mid femur with rows of long antero- and posteroventrals. Veins in basal region of wing dark brown to blackish, wing light brownish.......................................................................... segnis (Holmgren)
- Light grey dusted species, scutum with 3 brown vittae, sometimes indistinct. Facial edge not projecting forward beyond the level of profrons, sometimes behind this level. Mid femur without numerous long antero- and posteroventrals, with 1–3 strong anteroventrals and 1–3 long hair-like setae at base. Veins in basal region of wings yellow to brownish, wing yellow tinged...................................................................................................... 18
18. All tarsomeres black. Parafacial at level of insertion of arista slightly broader than width of postpedicel. Smaller species, 5.0– 7.8 mm. Fig. 9 A.......................................................................... grandis sp. nov.
- All legs with tarsomeres 1–2 brownish-yellow, and all tarsomeres brownish laterally. Parafacial at level of insertion of arista 1.7 times as wide as width of postpedicel. Larger species, 7.2–8.5 mm. Fig. 18 D....................... sibirica (Hennig)
19. Scutum with strong presutural and postsutural acrostichal setae, which are clearly distinct from ground-setulae................................................................................................ acrostichalis sp. nov.
- Strong presutural acrostichals absent..................................................................... 20
20. Prealar present, short and weak.......................................................................... 21
- Prealar entirely absent................................................................................. 22
21. Mid femur with the longer anteroventrals on apical third as long as diameter of femur. Abdomen subshining.................................................................................................... groenlandica (Lundbeck)
- Mid femur with the longer anteroventrals on apical third shorter then diameter of femur. Abdomen with grey dust................................................................................................... neoborealis (Snyder)
22. Facial edge projecting forward far beyond the level of profrons. Mid femur with rows of long anteroventrals and posteroventrals on basal half. Mid tibia with posterodorsal setae shorter than the preapical mid dorsal seta. Proboscis long, labella small. Larger species, at least 6.5 mm long...................................................... pribilofensis (Malloch)
- Facial edge not or slightly projecting forward beyond the level of profrons (fig. 18A). Mid femur with only 1–3 long setae on anterior and posterior surfaces. Mid tibia with posterodorsal setae which are as long as or longer than the preapical mid dorsal seta. Proboscis short, labella large. Smaller species, less than 6.2 mm long................................................................................ cristata sp. nov., grisea sp. nov., setibasis (Huckett), cantabrigensis (Huckett)
description: Published as part of Sorokina, Vera S. & Pont, Adrian C., 2015, A review of the genus Drymeia Meigen, 1826 (Diptera: Muscidae) in Russia, pp. 151-206 in Zootaxa 4000 (2) on pages 154-157, DOI: 10.11646/zootaxa.4000.2.1, http://zenodo.org/record/244482