Forcipomyia (Metaforcipomyia)

Spinelli, Gustavo R., Marino, Pablo I. & Borkent, Art, 2012, A revision of Biting Midges of the Subgenera Forcipomyia (Metaforcipomyia) and F. (Saliohelea) from Costa Rica (Diptera: Ceratopogonidae), Zootaxa 3419, pp. 1-52: 3-4

publication ID

http://doi.org/ 10.5281/zenodo.215031

persistent identifier

http://treatment.plazi.org/id/03A7878C-E374-FFC5-53D2-BCCE87D8FD73

treatment provided by

Plazi

scientific name

Forcipomyia (Metaforcipomyia)
status

 

Key to the Adult Forcipomyia (Metaforcipomyia)  of Costa Rica

Adults of the subgenus Forcipomyia (Metaforcipomyia)  may be distinguished from those of other New World Forcipomyia  by the absence of a row of slender spicules that comprise the comb at the apex of the hind tibia. In addition, the males of all species have antennal flagellomeres 5–8 fused, a condition not present in any other subgenus of Forcipomyia  .

Females of the following species are unknown: F. (M.) rivalis  n. sp., F. (M.) truncata  n. sp., F. (M.) atenasensis  n. sp., F. (M.) osaensis  n. sp., F. (M.) grandiseta  n. sp., F. (M.) longiflagellata  n. sp., F. (M.) macroseta  n. sp., F. (M.) germinata  n. sp., and F. (M.) ronderosae  n. sp.

1. Male............................................................................................... 2

- Female............................................................................................ 17

2. Parameres present ( Figs. 50View FIGURES 46 – 51, 55View FIGURES 52 – 56, 60View FIGURES 57 – 61, 65View FIGURES 62 – 71, 75View FIGURES 72 – 81, 85View FIGURES 82 – 91, 95View FIGURES 92 – 96, 100View FIGURES 97 – 106, 110View FIGURES 107 – 111); hind tarsal ratio 1.75–2.50 ............................. 3

- Parameres absent ( Figs. 6View FIGURES 1 – 10, 15View FIGURES 11 – 17, 22View FIGURES 18 – 23, 29View FIGURES 24 – 33, 38View FIGURES 34 – 39, 44View FIGURES 40 – 45); hind tarsal ratio 0.75–1.25 ........................................ 12

3. Foretarsomere 2 with 2–4 thick, basally reinforced setae, similar to those forming a row on tarsomere 1 ( Fig. 48View FIGURES 46 – 51)......... 4

- Foretarsomere 2 without thick, basally reinforced setae....................................................... 6

4. Flagellomere 10 proportionally short (1.10–1.35 X longer than flagellomere 11) ( Fig. 46View FIGURES 46 – 51)................ grandiseta  n sp.

- Flagellomere 10 proportionally elongate (2.07–2.80 X longer than flagellomere 11)................................. 5

5. Flagellomere 10 2.60–2.80 X longer than flagellomere 11 ( Fig. 52View FIGURES 52 – 56); wing without pattern; aedeagus quadrate, truncate apically ( Fig. 56View FIGURES 52 – 56)............................................................................ longiflagellata  n. sp.

- Flagellomere 10 2.07 X longer than flagellomere 11 ( Fig. 57View FIGURES 57 – 61); wing patterned ( Fig. 113View FIGURES 112 – 115); aedeagus tapering apically to rounded apex ( Fig. 61View FIGURES 57 – 61)............................................................................ macroseta  n. sp.

6. Wing patterned, with a dark patch on anterior margin of wing distal to apex of the radial cells and the apices of at least each of M 2, CuA 1 and CuA 2 ( Figs. 114–119View FIGURES 112 – 115View FIGURES 116 – 119)...................................................................... 7

- Wing without pattern of spots on apices of veins, with at most a dark patch on anterior margin of wing, distal to apex of radial cells ( Figs. 5View FIGURES 1 – 10, 14View FIGURES 11 – 17, 21View FIGURES 18 – 23, 43View FIGURES 40 – 45).............................................................................. 12

7. Tarsomere 1 of hind leg brown, contrasting with pale tarsomeres 2–5 ............................................ 8

- Tarsomeres of hind leg either unicolourous or with pattern of contrasting pigmentation.............................. 9

8. Flagellomeres 3–9 pale (plume arising from these is pale) ( Fig. 82View FIGURES 82 – 91); aedeagus slender, with apical lobes short, separated by broad rounded gap ( Fig. 86View FIGURES 82 – 91)................................................................ albipluma  n. sp.

- Flagellomeres 3–9 light to dark brown (plume arising from these is brown) ( Fig. 72View FIGURES 72 – 81); aedeagus stout, with apical lobes well developed, more elongate, separated by narrow gap ( Fig. 76View FIGURES 72 – 81)......................................... rursa  n. sp.

9. Tarsomeres of hind leg without contrasting pigmentation between any two tarsomeres, although the tarsomeres 1– 5 may be progressively lighter................................................................... pseudocerifera  n. sp.

- Tarsomere 1–2 of hind leg brown, contrasting with pale tarsomeres 3–5 ......................................... 10

10. Apex of aedeagus with short apicomedial prong ( Fig. 96View FIGURES 92 – 96)........................................ germinata  n. sp.

- Apex of aedeagus without apicomedial prong ( Figs. 101View FIGURES 97 – 106, 111View FIGURES 107 – 111)................................................. 11

11. Aedeagus triangular, tapering distally ( Fig. 101View FIGURES 97 – 106)................................................... heroni  n. sp.

- Aedeagus shield-shaped with lateral subapical, heavily sclerotized projections directed laterally, apex concave ( Fig. 111View FIGURES 107 – 111)........................................................................................... ronderosae  n. sp.

12. Aedeagus without elongate, posteriorly directed prong............................................. osaensis  n. sp.

- Aedeagus with elongate, slender posteriorly directed prong................................................... 13

13. Labrum truncate apically, with transverse row of elongate spicules ( Fig. 3View FIGURES 1 – 10); scutum pale, contrasting with dark scutellum, or, with dark pigmentation, equal to that of scutellum.......................................................... 14

- Labrum tapering apically, without transverse row of elongate spicules ( Fig. 26View FIGURES 24 – 33); scutum pale, contrasting with dark scutellum................................................................................................... 16

14. Hind femur with at least basal 0.3 darkly pigmented, apical portion pale ( Fig. 4View FIGURES 1 – 10); pigmentation of scutum variable: pale, with patch of darker pigmentation anteriorly, more extensively partially pigmented or entirely darkly pigmented..................................................................................................... pluvialis Malloch 

- Hind femur uniformly pale or uniformly dark ( Figs. 13View FIGURES 11 – 17, 20View FIGURES 18 – 23); scutum entirely pale or with uniformly dark pigmentation.... 15

15. Hind femur uniformly pale ( Fig. 13View FIGURES 11 – 17); scutum pale, contrasting with dark scutellum; basal arch of aedeagus heavily sclerotized, extending 1 / 20 of total length.................................................................. rivalis  n. sp.

- Hind femur uniformly dark ( Fig. 20View FIGURES 18 – 23); scutum and scutellum with uniformly dark pigmentation; basal arch of aedeagus poorly sclerotized, extending to 1 / 10 of total length..................................................... truncata  n. sp.

16. Hind femur with broad basal dark band, and all tibiae with subbasal and apical dark bands ( Fig. 27View FIGURES 24 – 33).......... anniae  n. sp.

- Hind femur basally brown and at least ¼ apical pale, and all tibiae with base broadly paler than apical portion ( Fig. 36View FIGURES 34 – 39)........................................................................................... atenasensis  n. sp.

17. Hind tibia entirely dark brown.......................................................................... 18

- Hind tibia mostly pale, apex dark........................................................................ 21

18. Cercus pale or very light brown, contrasting with dark segments 8–9 .................................. heroni  n. sp.

- Cercus brown, similar to dark segments 8–9 ............................................................... 19

19. Largest spermatheca more or less spherical ( Fig. 91View FIGURES 82 – 91); flagellomeres 3–8 paler than others ( Fig. 87View FIGURES 82 – 91)....... albipluma  n. sp.

- Largest spermatheca elongate ( Figs. 71View FIGURES 62 – 71, 81View FIGURES 72 – 81); flagellomeres uniformly brown ( Figs. 67View FIGURES 62 – 71, 77View FIGURES 72 – 81).......................... 20

20. Spermathecae slightly unequal in size ( Fig. 71View FIGURES 62 – 71); proximal flagellomeres flasked-shaped ( Fig. 67View FIGURES 62 – 71)..... pseudocerifera  n. sp.

- Spermathecae unequal in size ( Fig. 81View FIGURES 72 – 81); proximal flagellomeres bottle-shaped ( Fig. 77View FIGURES 72 – 81).................... rursa  n. sp.

21. Each tibia with subbasal and apical band of dark pigmentation....................................... anniae  n. sp.

- Each tibia with, at most, dark pigmentation at apex............................................ pluvialis Malloch