Rhamphomyia (Holoclera) portugalica, Barták & Kubík, 2012

Barták, Miroslav & Kubík, Stepán, 2012, A review of the Palaearctic species of Rhamphomyia subgenus Holoclera (Diptera: Empididae) with description of 5 new species, Revue suisse de Zoologie 119 (3), pp. 385-407 : 402-404

KEY TO PALAEARCTIC SPECIES OF RHAMPHOMYIA (HOLOCLERA)

1 Seta in posteroapical comb on hind tibia very short or absent. Fore femur with a row (often irregular) of short spine like anterior setae. Acrostichals absent. Palpus brown to black; if yellow (R.­ caliginosa ) than anal vein incomplete. ( R. (H.) nigripennis group).................. 2

- A long seta in posteroapical comb on hind tibia present. Fore femur without spine like anterior setae. Palpus yellow. Acrostichals present; if absent (R. (H.) variabilis and R. (H.) subvariabilis ) than anal vein complete. (R. (H.) flava group).................................. 22

2 (1) Palpus yellow. (Characters opposite of other species: supraalar seta present, fore coxa yellow, female frons lustrous and female hind femur with one to several ventral setae in apical third)..... R. (H.) caliginosa Collin

- Palpus brown to black.......................................... 3

3 (2) Dorsocentral setae 2-3 serial. (Characters opposite of other species: fore coxa brown, propleura setose, supraalar seta present, female frons microtrichose, female hind femur without long ventral setae; male fore femur with posterodorsal setae as long as femur is deep)....................................................... R. (H.) biserialis Collin

- Dorsocentral setae uniserial...................................... 4

4 (3) Male. (Unknown male of R. (H.) sp. 1 probably has mesoscutum lustrous)..................................................... 5

- Female..................................................... 13

5 (4) Cercus long, exceeding epandrium, with very long setae dorsally ( Collin, 1961: fig. 149b and Barták & Kubík, 2009: figs 6, 7).................. 6

- Cercus shorter than epandrium, with short setae....................... 7

6 (5) 8th sternite with 2-4 long marginal setae and 2-5 additional shorter setae; cercus parallel-sided in apical half, with only short setae ventrally, epandrium gently rounded apically, without spine-like setae apically, hypandrium long and densely setose, setae longer than maximum height of hypandrium ( Barták & Kubík, 2009: figs 6, 7)....... R. (H.) tenuipes Becker

- 8th sternite with many short setae in two irregular rows (10-12 setae in each row); cercus distinctly broadened apically, with long setae also along ventral margin, epandrium narrowed apically, with 1-2 strong spine-like apical setae, hypandrium short and sparsely setose, setae shorter than maximum height of hypandrium ( Collin, 1961: fig. 149b)............................................ R. (H.) lamellata Collin

7 (5) Cercus deeply concave, lower lobe broader than upper one, with a third short internal process (visible after dissection, Fig. 4 ). (Characters opposite of other species: fore coxa yellowish brown, supraalar seta present, labrum 1.5 times as long as head is high).......... R. (H.) portugalica sp. n.

- Cercus of different shape........................................ 8

8 (7) Cercus deeply concave (bilobate)................................. 9

- Cercus almost straight dorsally (unilobate).......................... 12

9 (8) Both epandrium and hypandrium short setose ( Fig. 8 ) ( Turkey).. R. (H.) sp. 2

- Epandrium long setose. Hypandrium either long setose or without setae... 10

10 (9) Supraalar seta absent. Fore coxa yellowish brown, paler than pleura. ( Fig. 2 )..................................... R. (H.) bohemica sp. n.

- Supraalar seta present. Fore coxa dark, concolorous with pleura.......... 11

11 (10) Hypandrium long setose ( Fig. 9 ), microtrichose in ventral view............................................. R. (H.) trigemina Oldenberg

- Hypandrium without setae, lustrous in ventral view....................................................... R. (H.) umbripennis Meigen

12 (11) Phallus extremely long, longer than abdomen (visible only after dissection). Cerci with inner margins angled. Epandrium with several strong setae on apex ( Barták, 1982: fig. 12d).. R. (H.) nigripennis (Fabricius)

- Phallus short. Cerci with inner margins straight (V-shaped in dorsal view). Epandrium with only a single short apical seta ( Fig. 3 )................................................... R. (H.) helvetica sp. n.

13 (4) Mesoscutum lustrous, leaving two narrow microtrichose stripes below dorsocentrals and somewhat broader median microtrichose stripe. Abdominal segments 2-5 almost without microtrichosity. (Other characters: supraalar seta absent, front coxa yellow)................ R. (H.) sp. 1

- Mesoscutum uniformly microtrichose. Abdominal segments 2-5 at least partly microtrichose........................................... 14

14 (13) Frons lustrous.......................... R. (H.) nigripennis (Fabricius)

- Frons microtrichose........................................... 15

15 (14) Supraalar seta present (sometimes very short). Fore coxa yellow (paler than pleura) or brown (concolorous with pleura)...................... 16

- Supraalar seta absent. Fore coxa yellow to yellowish brown, paler than pleura...................................................... 21

16 (15) Fore coxa yellow to yellowish brown, paler than pleura............... 17

- Fore coxa brown, concolorous with pleura.......................... 20

17 (16) Labrum more than 1.5 times as long as head is high. Fore coxa in most specimens darkened. Knob of halter yellowish brown. R. (H.) portugalica sp. n.

- Labrum less than 1.4 times as long as head is high. Fore coxa yellow. Knob of halter brown.......................................... 18

18 (17) Hind femur without long anteroventral seta, anterior spines on fore femur shorter than 0.02 mm long ( Turkey).................. R. (H.) sp. 2

- Hind femur with or without long anteroventral seta, anterior spines on fore femur up to 0.03 mm long.................................. 19

19 (18) South Mediterranean......................... R. (H.) tenuipes Becker

- Temperate European......................... R. (H.) lamellata Collin

20 (16) Dorsocentral setae long (about as long as the distance between their rows). Usually 1 long and 0-1 smaller supraalar seta. Frons slightly broadened above.......................... R. (H.) trigemina Oldenberg

- Dorsocentral setae shorter than the distance between their rows. Usually 2 small, subequal supraalars. Frons slightly broadened below............................................... R. (H.) umbripennis Meigen

21 (15) 1st flagellomere usually shorter than 0.20 mm, 1.4-1.7 times as long as stylus...................................... R. (H.) bohemica sp. n.

- 1 st flagellomere usually longer than 0.21 mm, 1.8-2.0 times as long as stylus...................................... R. (H.) helvetica sp. n.

22 (1) Acrostichal setae absent........................................ 23

- Acrostichal setae present....................................... 24

23 (22) Antennal stylus 1/3 the length of the 3rd segment. Mid and hind tibiae with anteroventral setae. Male hypandrium with several long submedian setae.................................... R. (H.) variabilis (Fallén)

- Antennal stylus more than half of length of the 3rd segment. Both mid and hind tibiae without anteroventral setae. Male hypandrium with two very short apical setae........................ R. (H.) subvariabilis p. n.

Figures

FIG. 4

FIG. 8 Rhamphomyia (Holoclera) sp. 2, male terminalia (macerated), lateral view. Scale 0.1 mm.

FIG. 2

FIG. 9

FIG. 3