Forcipomyia (Saliohelea) digita , Spinelli, Gustavo R., Marino, Pablo I. & Borkent, Art, 2012

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: 42-45

publication ID

10.5281/zenodo.215031

persistent identifier

http://treatment.plazi.org/id/03A7878C-E35F-FFEA-53D2-BE9A83C9FE5D

treatment provided by

Plazi

scientific name

Forcipomyia (Saliohelea) digita
status

n. sp.

Forcipomyia (Saliohelea) digita  n. sp.

( Figs. 129–137View FIGURES 129 – 137, 147View FIGURES 146 – 147)

Diagnosis. Male: only species of Neotropical Forcipomyia (Saliohelea)  with parameres slender, extending past posterior margin of aedeagus. Female: only species of Neotropical Forcipomyia (Saliohelea)  with palpal segment 3 with a deep sensory pit.

Description. Male. Head. Brown. Eyes abutting medially for length of three ommatidia. Antenna with plume setae well-developed, flagellomeres 1–4 separate, flagellomeres 5–8 at least partially fused, flagellomeres 10–13 ( Fig. 129View FIGURES 129 – 137) elongate; flagellomere 13 with apical nipple constricted basally; AR 0.96–1.11 (1.04, n = 10). Palpus pale brown; segment 3 slender, slightly swollen subapically, with sensory pit opening on distal third; PR 3.56–4.10 (3.85, n = 10).

Thorax. Dark brown except pleura brown; scutellum with 8 strong setae. Legs uniformly medium to dark brown; tarsomere 1 of hind leg slightly darker, swollen; hind tibial comb with 5 spines; foreleg TR 2.10–2.33 (2.23, n = 10), mid leg TR 1.73–1.89 (1.79, n = 9), hind leg TR 2.00– 2.30 (2.17, n = 10); claws curved, moderately stout. Wing ( Fig. 130View FIGURES 129 – 137) plain; vein M 2 visible; intercalary vein forked; first radial cell obliterated, second well developed, narrow; fork of cubitus situated distad to level of apex of costa; wing length 0.88–1.06 (1.01, n = 10) mm; breadth 0.28–0.34 (0.31, n = 5) mm; CR 0.39–0.43 (0.42, n = 10). Halter medium to dark brown.

Abdomen. Tergites uniformly brown. Genitalia ( Fig. 131View FIGURES 129 – 137): tergite 9 short, extending to 2 / 5 the length of gonocoxite; posterior margin rounded; cercus slender, lobe-like; sternite 9 short with long anterolateral projections; posterior margin nearly straight, with scattered setae. Gonocoxite moderately stout, 1.8 X longer than greatest breadth, with subbasal, inner, blunt lobe; gonostylus as long as gonocoxite, stout, nearly straight, tip blunt. Parameres represented by a long, slender posteromesally directed processes longer than length of aedeagus, each process gradually narrowed posterolaterally, gonocoxal apodemes hyaline. Aedeagus ( Fig. 132View FIGURES 129 – 137) heavily sclerotized; two slender posteromesally directed processes, each one tapering to pointed tip; basal arch extending to 1 / 3 of total length; lateral arms stout.

Female. As for male, with following differences; antenna with flagellomeres 1–8 subspherical, slightly longer than broad; progressively longer, flagellomeres 9–13 slightly elongate, 9–12 progressively shorter, proportions as shown in Fig. 133View FIGURES 129 – 137, flagellomere 13 with apical nipple, constricted basally; AR 0.82–0.93 (0.88, n = 8). Palpus ( Fig. 134View FIGURES 129 – 137) pale brown; segment 3 slender, with broad, deep sensory pit opening on distal third; segments 4, 5 completely fused, shorter than segment 3; PR 2.33–2.91 (2.59, n = 10).

Thorax. Legs uniformly light to medium brown, tarsomere 1 of hind leg slender; foreleg TR 2.25–2.50 (2.33, n = 10), midleg TR 2.00– 2.25 (2.09, n = 9), hind leg TR 2.11–2.44 (2.25, n = 10), claws curved, moderately stout. Wing ( Fig. 135View FIGURES 129 – 137) plain, without pattern of pigmented membrane; first radial cell obliterated, second well developed, narrow; fork of cubitus situated at level of apex of costa; wing length 0.82–0.98 (0.90, n = 10) mm; breadth 0.34–0.42 (0.39, n = 10) mm; CR 0.46–0.49 (0.47, n = 10).

Abdomen. Tergites uniformly brown. Genital sclerotization ( Fig. 136View FIGURES 129 – 137) quadrangular, lateral arms long. One spermatheca ( Fig. 137View FIGURES 129 – 137) pyriform with short neck, heavily sclerotized, measuring 0.084 by 0.048 mm. cercus pale brown.

Distribution. This species in known only from high altitudes in Costa Rica, from 1400–2200 meters ( Fig. 147View FIGURES 146 – 147).

Taxonomic discussion. Males and females were collected at the same locality and date. This species is similar to F. leei  . The female of the latter species differs from the female of F. digita  by the spermatheca being ovoid with a recurved neck and the presence of one rudimentary spermatheca. The male of F. leei  differs from the male of F. digita  by the presence of posteromesally directed processes of the parameres being shorter than the length of aedeagus, and by the triangular, stout aedeagus, tapering to a conical, blunt tip.

Bystrak & Wirth (1978), in their revision of the Nearctic species of Forcipomyia (Euprojoannisia) Brèthes  , described six new species including F. pechumani  . We examined the holotype male and two paratype males, all on microscope slides ( USNMAbout USNM). Based on our examination and the description and accompanying illustrations of F. pechumani  in Bystrak & Wirth (1978), it is clear that it belongs to the subgenus Saliohelea. The aedeagus of F. pechumani  is similar to that of F. digita  except that it has a stouter posteriorly directed process ending in a blunt tip; other major differences of F. pechumani  are that the parameres are clearly shorter than the aedeagus, the hind tarsomere 1 is expanded, and the male hind tarsomere 1 is swollen but more slender than the hind tibia.

Type material. Holotype male on microscope slide, labeled “ HOLOTYPE Forcipomyia (Saliohelea) digita Spinelli, Marino and Borkent  , Costa Rica, San José prov., Est. Santa Elena, 1850 m, 6 -VII / 6 -VIII- 1997, E. Alfaro – M. Segura, CD 5073 ” ( INBCAbout INBC). Paratypes, 36 males and 18 females (1 male, USNMAbout USNM; 1 male, MLPA; 4 males, CNCIAbout CNCI; 7 males, INBCAbout INBC) as follows: same data as holotype, 2 males, 1 female ( CNCIAbout CNCI). Costa Rica, Tapantí, Paraíso, Orosí, no data, Alfaro, CD 5043, 1 male ( INBCAbout INBC). Costa Rica, Cartago prov., Sector La Represa, sendero Rancho Negro, Tapantí, 1700–1800 m, 14 -VIII / 17 -IX- 1996, R. Delgado, Malaise tp., CD 5112, 1 male ( INBCAbout INBC). Costa Rica, Cartago prov., Tapantí NP, río Dos Amigos, 1500 m, 3 -VI / 6 -VII- 1995, R. Delgado, Malaise tp., CD 5180, 2 males ( INBCAbout INBC). Costa Rica, Cartago prov., Sector La Represa, costado Torre ICE entre ríos Porras y Villegas, 1800 m, III- 1997, R. Delgado, Malaise tp., CD 5166, 1 male ( INBCAbout INBC). Costa Rica, Cartago prov., ACLA-P., Paraíso, Tapantí NP, La Represa, Torre ICE entre ríos Porras y Villegas, 1800 m, III- 1997, R. Delgado, Manual (red libre), CD 5174, 1 male ( INBCAbout INBC). Costa Rica, Cartago prov., Sector La Represa, Torre ICE entre ríos Porras y Villegas, 1800 m, IV- 1997, R. Delgado, Malaise tp., CD 5233, 1 male, 3 females ( CNCIAbout CNCI). Costa Rica, Cartago prov., Paraíso, ACLA-P. Tapantí NP, La Represa, Torre ICE entre ríos Porras y Villegas, 1800 m, V- 1997, R. Delgado, Malaise tp., CD 5185, 1 male ( CNCIAbout CNCI). Same data except VI- 1997, Manual, CD 5338, 2 males ( INBCAbout INBC). Costa Rica, Cartago prov., Quebrada segunda, Tapantí, 1150 m, VIII- 1994, G. Mora, Malaise tp., CD 5211, 1 male, 1 female ( MLPA). Costa Rica, Cartago prov., Barbilla NP, sendero principal a río Barbilla, Tapantí, 400–500 m, 10 -X / 10 -XI- 2002, E. Rojas, Malaise tp., 1 male ( INBCAbout INBC). Costa Rica, A.C., La Amistad Pacífico, Paraíso, Orosí, Tapantí NP, Macizo de la Muerte, La Represa camino al tunel del río Humo, 1400–1500 m, 22 -XII- 1999 / 18 -I- 2000, M. Alfaro, Malaise tp., CD 5306, 1 female ( CNCIAbout CNCI). Costa Rica, Puntarenas prov., Send. a C. Pittier, 1 km N de la Est., 1800–2000 m, 13 - IX- 1996, A. M. Maroto, CD 5054, 3 females ( INBCAbout INBC). Costa Rica, Puntarenas prov., Send. Pittier, 1 km N de la Est., 1800–2000 m, 4 -III / 4 -IV- 1997, M. Moraga, CD 5066, 2 males, 3 females ( INBCAbout INBC). Costa Rica, Puntarenas prov., Casa Coca, sendero a Cerro Frantzius, 1950 m, 21 -VI- 1999, A. Picado, red de golpe, CD 5102, 1 female ( INBCAbout INBC). Costa Rica, San José prov., sendero Jueves 13, Est. Santa Elena, 1850 m, 20 -III- 1997, Segura – Alfaro, Malaise tp., CD 5107, 3 males ( CNCIAbout CNCI). Costa Rica, San José prov., ACLA-P., Pérez Zeledón, Chirripó NP, Est. Santa Elena, send. El Llano, 1800 m, 28 -X / 27 -XI- 1996, E. Alfaro, Manual (red, libre), CD 5151, 1 male ( CNCIAbout CNCI). Costa Rica, San José prov., ACLA-P., Pérez Zeledón, Chirripó NP, Est. Santa Elena, send. Jueves 13, 1850 m, 2 -VI / 6 -VII- 1997, Alfaro – Segura, Manual (red, libre), CD 5207, 1 male ( INBCAbout INBC). Same data except 6 -VIII / 15 -IX- 1997, Segura – Alfaro, Malaise tp., CD 5367, 1 male ( INBCAbout INBC). Costa Rica, San José prov., ACLA-P., Chirripó NP, Est. Santa Elena, send. Jueves 13, 1850 m, 15 -IV / 2 -VI- 1997, Alfaro – Segura, Manual (red, libre), CD 5352, 1 male ( CNCIAbout CNCI). Costa Rica, San José prov., Pérez Zeledón, Est. Sta. Elena ACLA-P., 14 -II / 16 -III- 1996, Segura - Alfaro, LS 371700View Materials N/ 507800 E, # 8527, CD 5014, 1 male ( USNMAbout USNM). Costa Rica, Cartago prov., Tapantí NP, La Represa, Torre ICE entre los ríos Porras y Villegas, 1800 m, I- 1999, R. Delgado, LS – 186150 N/ 160100 E, # 47544, CD 5013, 6 males, 3 females (3 males, 1 female, INBCAbout INBC; 3 males, 2 females, CNCIAbout CNCI). Costa Rica, Cartago prov., Tapantí NP, La Represa, Torre ICE entre los ríos Porras y Villegas, 1800 m, VIII- 1997, R. Delgado, LS – 560100 N/ 186150 E, # 47549, CD 5016, 2 males, 1 female ( CNCIAbout CNCI). Costa Rica, Cartago Prov., Tapantí NP, La represa – zone del ICE, entre los ríos Porras y Villegas, 1800 m. XII, 1996, R. Delgado, CD 5018, 4 males, 1 female ( INBCAbout INBC).

Derivation of specific epithet. The name digita  (finger), refers to the somewhat finger-like posterior extensions of the aedeagus.

USNM

Smithsonian Institution, National Museum of Natural History

INBC

Instituto Nacional de Biodiversidad (INBio)

CNCI

Canadian National Collection Insects