Microphorella acroptera

Brooks, Scott E. & Cumming, Jeffrey M., 2025, Revision of the Microphorella acroptera species group and establishment of the Microphorella arcana species group (Diptera: Dolichopodidae sensu lato: Parathalassiinae), Zootaxa 5661 (4), pp. 451-503 : 454-455

publication ID

https://doi.org/10.11646/zootaxa.5661.4.1

publication LSID

lsid:zoobank.org:pub:F9498ECE-DED3-46F1-A7D3-1E726D1D11A0

persistent identifier

https://treatment.plazi.org/id/039A87AB-FFD4-FFD7-FF42-FD8125B3F7B7

treatment provided by

Plazi

scientific name

Microphorella acroptera
status

 

Key to males of the Microphorella acroptera View in CoL species group

1 Wing with vein CuA+CuP modified as a spot ( Fig. 89 View FIGURES 86–89 ); face and clypeus silvery ( Fig. 87 View FIGURES 86–89 ), face narrow at middle, clypeus projecting to lower eye level with rounded ventral margin; antennal postpedicel with elongate narrow apex ( Fig. 87 View FIGURES 86–89 ); lower postocular setae and coxal setae white ( Figs 87, 86 View FIGURES 86–89 ).......................................... M. maculata sp. nov.

- Wing without spot-like CuA+CuP vein ( Fig. 95 View FIGURES 92–96 ); face and clypeus brown or blackish, clypeus not projecting to lower eye level with truncate ventral margin; antennal postpedicel without elongate narrow apex (e.g., Figs 4 View FIGURES 4–5 , 6 View FIGURES 6–10 , 58 View FIGURES 56–59 , 72 View FIGURES 71–77 ); body with all setae dark (e.g., Figs 64–66 View FIGURES 64–66 , 92 View FIGURES 92–96 ).............................................................................. 2

2 Abdominal sternite 6 with narrow projecting process ( Fig. 96 View FIGURES 92–96 ); hind trochanter with tubercle large and rounded or disc-shaped ( Figs 93, 94 View FIGURES 92–96 ); hypandrium with knob-like or dome-like posterior protrusion ( Figs 97, 98 View FIGURES 97–99 ); cercus digitiform and curved medially, with long setae ( Fig. 99 View FIGURES 97–99 )................................................................................ 3

- Abdominal sternite 6 without narrow process; hind trochanter with tubercle cylindrical, clavate or rounded ( Figs 8, 9 View FIGURES 6–10 , 18, 21 View FIGURES 17–24 , 66 View FIGURES 64–66 ); hypandrium without posterior protrusion (e.g., Figs 11, 12 View FIGURES 11–16 , 29, 30 View FIGURES 29–31 , 67, 68 View FIGURES 67–70 , 78–80 View FIGURES 78–80 ); cerci not as above (e.g., Figs 31 View FIGURES 29–31 , 38 View FIGURES 36–40 , 43 View FIGURES 41–46 , 55 View FIGURES 52–55 , 69 View FIGURES 67–70 , 82 View FIGURES 81–85 )........................................................................................... 4

3 Hind tibia with dorsal row of about 5 long setae, shortening distally ( Figs 92, 93 View FIGURES 92–96 ); abdominal sternite 8 with greatly elongated setae on posterior margin ( Figs 92, 96 View FIGURES 92–96 ); hypandrium with narrow knob-like posterior protrusion ( Figs 97, 98 View FIGURES 97–99 )............................................................................................ M. trochanterata sp. nov.

- Hind tibia without row of long setae; abdominal sternite 8 with setae on posterior margin not greatly elongated; hypandrium longer with broad dome-like posterior protrusion............................................ Microphorella sp. A

4 Antennal postpedicel long and triangular, longer than stylus ( Fig. 58 View FIGURES 56–59 ); hind basitarsus with short, spur-like basiventral seta ( Fig. 59 View FIGURES 56–59 )............................................................................... M. triangulata sp. nov.

- Antennal postpedicel bulb-shaped, usually distinctly shorter than stylus (e.g., Figs 4 View FIGURES 4–5 , 34 View FIGURES 32–35 , 56 View FIGURES 56–59 , 65 View FIGURES 64–66 , 71, 72 View FIGURES 71–77 ); hind basitarsus with or without spur-like basiventral seta....................................................................... 5

5 Halter pale yellow ( Figs 23 View FIGURES 17–24 , 32, 34, 35 View FIGURES 32–35 ); hind basitarsus without spur-like basiventral seta............................ 6

- Halter brown to blackish (e.g., Figs 4 View FIGURES 4–5 , 6 View FIGURES 6–10 , 56 View FIGURES 56–59 , 63 View FIGURES 60–63 , 72 View FIGURES 71–77 ); hind basitarsus with or without spur-like basiventral seta............ 7

6 Hypopygium large compared to rest of abdomen ( Figs 34, 35 View FIGURES 32–35 ); hypandrium large and ovoid with anterior end broadly rounded ( Figs 41, 42 View FIGURES 41–46 ); phallus slightly inflated in middle portion, with U-shaped curve protruding posteriorly ( Figs 41, 42, 44, 45 View FIGURES 41–46 )..................................................................................... M. serpentina sp. nov.

- Hypopygium smaller ( Figs 32, 33 View FIGURES 32–35 ); hypandrium with anterior end tapered and broadly conical ( Figs 36, 37 View FIGURES 36–40 ); phallus greatly inflated in middle portion ( Figs 39, 40 View FIGURES 36–40 ), without protruding U-shaped curve ( Figs 36, 37 View FIGURES 36–40 )......... M. paracroptera sp. nov.

7 Hind trochanter with large clavate tubercle bearing blunt-tipped spine-like seta ( Fig. 66 View FIGURES 64–66 ); hypopygium distinctive ( Figs 61 View FIGURES 60–63 , 66 View FIGURES 64–66 ) with projecting posterior components prominent and pale yellow (i.e., surstyli, postgonites, phallus); cercus large with pale yellow base and dark subtriangular apical lobe ( Figs 60, 61 View FIGURES 60–63 , 66–69 View FIGURES 64–66 View FIGURES 67–70 ); face narrowing below to width of anterior ocellus, dark coppery brown ( Fig. 63 View FIGURES 60–63 )............................................................... M. tubifera Melander View in CoL

- Hind trochanter with tubercle smaller, shorter and usually cylindrical ( Figs 8, 9 View FIGURES 6–10 , 21, 24 View FIGURES 17–24 , 48, 51 View FIGURES 47–51 , 73, 77 View FIGURES 71–77 , although sometimes clavate in M. bifida sp. nov., Fig. 18 View FIGURES 17–24 ); hypopygium with cercus and most other projecting posterior components brownish; cercus structure and colouration not as above; face broader than width of anterior ocellus............................ 8

8 Hind basitarsus with very small, stout, basiventral spur-like seta ( Figs 22 View FIGURES 17–24 , 57 View FIGURES 56–59 )..................................... 9

- Hind basitarsus without basiventral spur-like seta........................................................... 10

9 Hind trochanter tubercle rounded, globular with small spine-like seta ( Fig. 21 View FIGURES 17–24 ); cercus with narrow, dorsally-projecting lobe ( Figs 29–31 View FIGURES 29–31 ); dorsal lobe of surstylus with 3–4 prensisetae ( Figs 29, 30 View FIGURES 29–31 ) on right and left sides of hypopygium; apical portion of phallus (distal to inflated part) elongate, with U-shaped curve protruding posteriorly ( Figs 29, 30 View FIGURES 29–31 ).. M. convoluta sp. nov.

- Hind trochanter tubercle cylindrical with large spine-like seta (as in Fig. 8 View FIGURES 6–10 ); cercus without narrow, dorsally-projecting lobe (similar to Figs 11, 12 View FIGURES 11–16 ); dorsal lobe of surstylus with 1 well-developed prensiseta on right side only ( Fig. 16 View FIGURES 11–16 ); apical portion of phallus (distal to inflated part) shorter, without protruding U-shaped curve (as in Figs 11–15 View FIGURES 11–16 )...... M. subacroptera sp. nov.

10 Thorax with acrostichal setae sparse and irregular, or absent; ventral epandrial process with hook-like tip ( Fig. 11 View FIGURES 11–16 ); right dorsal surstylar lobe thumb-like, bearing blade-like prensiseta laterally ( Fig. 12 View FIGURES 11–16 )....................... M. acroptera Melander View in CoL

- Thorax with acrostichal setae well-developed and biserial; ventral epandrial process with variable tip ( Figs 25 View FIGURES 25–28 , 51 View FIGURES 47–51 , 52, 54 View FIGURES 52–55 , 78, 79 View FIGURES 78–80 , 81, 84, 85 View FIGURES 81–85 ); right dorsal surstylar lobe broad and truncate, bearing 2 prominent prensisetae ( Figs 26 View FIGURES 25–28 , 53 View FIGURES 52–55 ), or short and broad, bearing 4 setae ( Figs 80 View FIGURES 78–80 , 83 View FIGURES 81–85 )............................................................................ 11

11 Thorax dull, dark bronze pruinose in dorsal view; hypopygium large with prominent, bulbous hypandrium ( Figs 18 View FIGURES 17–24 , 25, 26 View FIGURES 25–28 , 51–53 View FIGURES 47–51 View FIGURES 52–55 ); cercus elongate ( Figs 28 View FIGURES 25–28 , 55 View FIGURES 52–55 ); left dorsal surstylus short and broad ( Figs 25 View FIGURES 25–28 , 52 View FIGURES 52–55 )............................ 12

- Thorax blackish with blue tinge in dorsal view; hypopygium more compact with smaller, narrower hypandrium ( Figs 74–81, 83, 85 View FIGURES 71–77 View FIGURES 78–80 View FIGURES 81–85 ); cercus small and short ( Figs 78–85 View FIGURES 78–80 View FIGURES 81–85 ); left dorsal surstylus elongate and narrow ( Figs 78, 79 View FIGURES 78–80 , 81, 84, 85 View FIGURES 81–85 ).......... 13

12 Cercus with bifid lateral lobe ( Fig. 28 View FIGURES 25–28 )....................................................... M. bifida sp. nov.

- Cercus with undivided, digitiform lateral lobe ( Fig. 55 View FIGURES 52–55 )........................................ M. sinuosa sp. nov.

13 Phallus greatly elongated and C-shaped with broadened apex ( Figs 83, 84 View FIGURES 81–85 )........................ M. elongata sp. nov.

- Phallus shorter and J-shaped with narrow apex ( Figs 78, 79 View FIGURES 78–80 , 81, 85 View FIGURES 81–85 )............................................ 14

14 Ventral epandrial process gradually tapered apically to narrow pointed tip ( Fig. 78 View FIGURES 78–80 ); left postgonite with long, thick apical projection ( Fig. 78 View FIGURES 78–80 ); phallus well-sclerotized with long ventral process arising basally and extending to full length of phallus ( Fig. 78 View FIGURES 78–80 )........................................................................... M. acuminata sp. nov.

- Ventral epandrial process not gradually tapered apically ( Figs 79 View FIGURES 78–80 , 81, 85 View FIGURES 81–85 ); left postgonite with apical projection short and narrow, or long and narrow ( Figs 79 View FIGURES 78–80 , 81, 85 View FIGURES 81–85 ); phallus robust or delicately sclerotized, with process shorter and arising near middle or preapically ( Figs 79 View FIGURES 78–80 , 81, 85 View FIGURES 81–85 )................................................................... 15

15 Left postgonite with short apical projection ( Fig. 85 View FIGURES 81–85 ); phallus with short, narrow, pointed process arising preapically and extending nearly to tip of phallus ( Fig. 85 View FIGURES 81–85 )................................................... M. tenuis sp. nov.

- Left postgonite with long apical projection ( Figs 79 View FIGURES 78–80 , 81 View FIGURES 81–85 ); phallus robust with short, thick process arising near mid-length that ends well before tip ( Fig. 79 View FIGURES 78–80 ), or thin and delicately sclerotized, with narrow pointed process extending nearly to phallic tip ( Fig. 81 View FIGURES 81–85 )........................................................................................... 16

16 Phallus thin and delicately sclerotized, with narrow pointed process arising preapically and extending nearly to phallic tip ( Fig. 81 View FIGURES 81–85 ); tip of ventral epandrial process with digitiform dorsoapical process ( Fig. 81 View FIGURES 81–85 ); right postgonite not protruding below ventral lobe of surstylus and even with posterior epandrial margin..................................... M. compacta sp. nov.

- Phallus robust with short, thick process arising near mid-length that ends well before tip ( Fig. 79 View FIGURES 78–80 ); tip of ventral epandrial process emarginate, without digitiform dorsoapical process ( Fig. 79 View FIGURES 78–80 ); right postgonite protruding below ventral lobe of surstylus and extending beyond posterior epandrial margin ( Fig. 80 View FIGURES 78–80 )..................................... M. cornuta sp. nov.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Dolichopodidae

Genus

Microphorella

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