Two new species of the subgenus Forcipomyia (Metaforcipomyia), from Argentina, F. (M. ) williamsi and F. (M.) galliarii,are described and illustrated. In addition, F. (M.) cerifera Saunders, 1956 is redescribed and first recorded for Argentina.Instituto de Limnología "Dr. Raúl A. Ringuelet

Marino, Pablo Ignacio

Spinelli, Gustavo Ricardo

Iheringia Série Zoologia

English

Servicio de Difusión de la Creación Intelectual

THE SUBGENUS FORCIPOMYIA (METAFORCIPOMYIA) IN ARGENTINA(DIPTERA, CERATOPOGONIDAE)Pablo I. Marino 'Gustavo R. Spinelli 'ABSTRACTTwo new species of the subgenusForcipomyia (Metaforcipomyia), from Argentina, F. (M. ) williamsi andF. (M.)go///anz,aredescribedandillustrated. Inaddition.F. (M.)cerifera Saunders, 1956 is redescribed and firstrecorded for Argentina.KEYWORDS. Forcipomyia, Metaforcipomyia, new species, taxonomy, Argentina.INTRODUCTIONForcipomyia Meigen, 1818, is a large and extremely diverse genus ofCeratopogonidae, worldwide in distribution and diverse in morphology and habitatpreference (Dow & Wirth, 1972), including many species which are important pollinatorsof cocoa (Spinelli & Wirth, 1993). Borkent & Wirth (1997) mentioned 877 extantspecies arranged in 28 subgenera; from this large number 155 species and 17 subgeneraare known to occur in the Neotropical region. Twenty-eight species assembled in 12subgenera are recorded for Argentina (Spinelli & Wirth, 1993; Spinelli & Marino,1997, 1998).The subgenus Metaforcipomyia Saunders includes 13 species, 12 of themdistributed in gondwanian áreas (Austrália, New Caledónia, Papua New Guinea, SouthAfrica, Brazil), and the remaining one, Forcipomyia (M.) pluvialis Malloch, 1923,recorded from east of North America. The only species surely recognized as belongingto the subgenus Metaforcipomyia in South America is Forcipomyia (M.) ceriferaSaunders, 1956, known only from its type locality in the State of Rio de Janeiro, Brazil.1 . Instituto de Limnologia "Dr. Raul A. Ringuelet", Casilla de Correo 712, 1900 La Plata. Argentina.Iheringia, Sér. Zool., Porto Alegre, (86): 3-8, 4jun 1999Marino & SpinelliSpinelli & Wirth (1993), based mainly on the original description treated the patagonianspecies F. maculosa Ingram & Macfie, 1931, as a member of the subgenusMetaforcipomyia. Borkent & Wirth (1997) placed it in the subgenus Forcipomyia. Asthe type of F. maculosa (deposited in the Natural History Museum, London) has notbeen carefully checked, we are considering its subgeneric status as uncertain.The purpose is to describe two new species of the subgenus Metaforcipomyiafrom Argentina, and to record F. (M.) cerifera from the northeastern area of the country,basead on the material recently collected and deposited in the collection of the Museode la Plata, Argentina (MLP).For terminology on Forcipomyia and key to subgenera see Debenham (1987a); fordiagnosis of subgenus Metaforcipomyia and morphological characters of australasianspecies see Debenham (1987b).Forcipomyia (Metaforcipomyia) cerifera Saunders(Fies. 1-5)Forcipomyia (Metaforcipomyia) cerifera Saunders, 1956: 685 (all stages, Brazil); Wirth, 1974: 7 (cat.); Borkent& Wirth, 1997: 42 (cat).Diagnosis. Recognized by: basal flagellomeres of female antenna flask-shaped,segments 11-14 not elongated; palpal segments 4 and 5 fused, third segment slightlyswollen with shallow sensory pit; scutum brown, scutellum dark brown; spermathecaepyriform, slightly unequal.Female. Wing length 0.82 mm; breadth 0.38 mm.Head. Pale brown, Vertex clothed with pectinate and lanceolate scales. Antenna(fig. 1 ) brown, lengths of flagellomeres in proportion of 17-18-18-19-19-19-19-19-18-18-18-17-28; AR 0.66. Palpus (fig. 2) with lengths of segments in proportion of 8-10-23-21 (4 +5); third segment slightly swollen, with shallow sensory pit; fourth and fifthsegments completely fused, with abundant setae and pectinate scales; PR 2.09.Thorax. Scutum brown with pectinate scales, scutellum dark brown with eightstrong setae. Legs uniformly pale brown, pilose, with abundant pectinate and lanceolatescales. Prothoracic and mesothoracic TR 2.75, metathoracic TR 2.30. Wing (fig. 3)with abundant pectinate scales; CR 0.46. Halter knob brown.Abdomen. Tergites and sternites brown, pleuron paler covered with narrowpectinate scales and long hairs, cerci brown. Two pyriform spermathecae (fig. 4),moderately sclerotized, slightly unequal, measuring 0.048 by 0.030 mm and 0.045 by0.026 mm. Genital sclerotization (fig. 5) U-shaped.Male. According to Saunders (1956) parameres extend toback to tip of aedeagus,and the distal tip of aedeagus is bilobated, serrate, membranous.Distribution. Argentina (Misiones), Brazil (Rio de Janeiro).Holotype % Brazil, Rio de Janeiro. VIII. 1 923, in the Canadian National Collection,Ottawa, not examined.Material examined. ARGENTINA. Misiones: Campo Viera. 1 9, 7/9.X. 1 982. G.R. Spinelli, at light (MLP).Discussion. The female here studied agrees with the original description ofIheringia. Sér. Zool., Porto Alegre, (86): 3-8, 4 jun 1999The subgenus Forcipomyia (Metaforcipomyiä) in Argentina.Forcipomyia (M.) cerifera by Saunders (1956), except for the coloration of the halter,which is "...white, not chalky". However, we consider that this difference itself is notenough to recognize it as another species.Forcipomyia (Metaforcipomyiä) galliarii sp.n.(Figs. 6 - 9)Diagnosis. Recognized by: basal flagellomeres short, vasiform; third segment palpalelongated, with short, shallow sensory pit; fourth and fifth segments almost completelyfused; scutum brown, numeral area and scutellum pale brown; two pyriform speiTnathecaewith short necks open toward ducts.Female. Wing length 1.06 (1.04-1.10, n=5) mm; breadth 0.46 (0.44-0.48, n=5)mm.Head. Brown. Vertex with numerous insertions of setae and scales. Eyes bare,contiguous by a distance equal of the diameter of four ommatidial facets. Antenna (fig.6) uniformly brown, lengths of flagellomeres in proportion of 13-14-15-16-16-16-17-18-22-23-24-24-32; flagellomeres short 3-5 globose, 6-10 vasiform, 11-14 cylindrical,15 subconical with rounded apical papilla; AR 0.99 (0.97-1.00, n=3). Palpus (fig. 7)with lengths of segments of proportion of 16-16-43-38 (4+5); third segment slightlyswollen at midportion, with shallow, small, sensory pit open by a small pore; fourth andfifth segments almost completely fused. PR 3.97 (3.28- 4.30, n=5).Thorax. Scutum brown, humeral and posterolateral areas paler; scutellum palebrown with eight strong setae, and several minor setae; post-scutellum brown. Legsuniformly pale brown with pectinate scales (only evident in one of the paratypes). Hastatespine on tibiae of fore and hind legs. Prothoracic TR 2.12 (2.00-2.20, n=5), mesothoracicTR 1.79 (1.72-1.90, n=5), metathoracic TR 1.87 (1.83-1.92, n=4). Wing (fig. 8) withabundant lanceolate scales, 'much more concentrated on and beyond costa; CR 0.48(0.47-0.48, n=5). Halter pale brown.Abdomen. Tergites and sternites darker than pleuron. Two pyriform spermafhecae(fig. 9), necks short, open toward ducts, measuring 0.088 by 0.056 mm and 0.076 by0.056 mm. Genital sclerotization not visible in the studied material.Distribution. Argentina (Misiones).Types. Argentina, Misiones, Aristobulo del Valle, holotype 9 and 4 9 paratypes,17/26.VII. 1996, J. Williams & C. Galliari, malaise trap.Etymology. The specific name is a patronym in honor of Carlos A. Galliari inrecognition of his important help collecting ceratopogonids in Argentina.Forcipomyia (Metaforcipomyiä) williamsi sp. n.(Figs. 10-17)Diagnosis. Species recognized by the following combination of characters:flagellomeres elongate, vasiform; palpus 4-segmented, third segment moderately swollenat midportion without sensory pit; scutum yellowish; two pyriform spermathecae withshort and slender necks; ninth male sternum 2.12 times broader than long, withoutcaudomedian excavation; basistylar apodeme strong, curving forward to join in flat-Iheringia, Sér. Zool., Porto Alegre, (86): 3-8, 4 jun 1999Marino & Spinellitopped arch basal; aedeagus T-shaped.Female. Wing length 1.06 (0.98-1.12, n=6) mm; breadth 0.37 (0.34-0.40, n=6)mm.Head. Pale brown. Vertex, fronto-clypeus and pedicel with pectinate scales.Antenna (fig. 10) with flagellomeres pale brown, narrow bases darker; flagellomereselongate, vasiform, lengths in proportion of 21-23-27-28-30-30-30-30-33-33-32-30-35; AR 0.75 (0.72-0.80, n=6). Palpus (fig. 11) densely covered with pectinate scales,lengths of segments in proportion of 12-15-34-31 (4+5); third segment without sensorypit, with a few scattered sensillae on surface; fourth and fifth segments completelyfused, tapering. PR 3.38 (3.20-3.68, n=6).Thorax. Scutum yellowish brown; scutellum and postscutellum dark brown, the<zyFigs. 1 -9. Forcipomyia cerifera Saunders. 9; 6-9, Forcipomyia galliarii sp. n., 9, holotype: 1 -6 flagellum; 2, 7,palpus: 3,8, wing; 4, 9, spermathecae; 5, genital sclerotization. Bars=0,05mm.Iheringia, Sér. Zool., Porto Alegre, (86): 3-8, 4 jun 1 999The subgenus Forcipomyia (Metaforcipomyia) in Argentina...former with two rows of ten strong setae (arranged in 2 anterior and 8 posterior), andseveral minor setae. Legs uniformly pale brown, pilose with abundant pectinate scales.Hind tibial comb with five dark bristles. Prothoracic TR 2.04 (1.90-2.16, n=6),mesothoracic TR 1.21 (1.14-1.34, n=6), metathoracic TR 1.14 ( 1.04-1.27, n=6). Wingwith abundant pectinate scales, mostly concentrate along veins giving a pattern of darkand pale spots (fig. 12); CR 0.39 (0.37-0.42, n=6). Häher pale?Abdomen. Brown, with pectinate scales; cerci short. Two rounded spermathecae(fig. 13), slightly unequal, with short and slender necks, measuring 0.048 by 0.038 mmand 0.044 by 0.040 mm. Genital sclerotization (fig. 14) ring-shaped.Male. Wing length 1.03 (1.02-1.05, n=3) mm; breadth 0.31 (0.30-0.33, n=4)mm. Similar to the female with usual sexual differences. Flagellomeres 12-15 withFigs. 10-17.Forcipomyiawüliamsi sp.n., 10-14,9; 15-17,c?(allotype): 10,flagellum; 1 l.palpus; 1 2, left wing;13, spermathecae; 14, genital sclerotization; 15, flagellomeres XI-XV; 16, genitália (aedeagus removed); 17.aedeagus, ventral view. Bars = 0,05 mmIheringia, Sér. Zool.. Porto Alegre, (86): 3-8, 4 jun 1999Marino & Spinellilengths in proportionof 73-40-39-41 (fig.15), butthe wing hyaline with abundant scaleson costal area; CR 0.39 (0.38-0.41, n=3). Prothoracic TR 2.00. mesothoracic TR 1.26(1.18-1 .30, n=4), metathoracic TR 1 .23 ( 1 . 1 8- 1 .3 1 , n=4). Abdomen whitish, with lightbrown apicolateral spots on each tergite.Terminalia (fig. 16): ninth sternum 2.12 times broader than long, withoutcaudomedian excavation. Ninth tergum short with conspicuous apicolateral processes.Gonocoxite 1.54 times longer than broad; gonostylus straight, slender, 0.85 times aslong as gonocoxite with blunty pointed-tip. Aedeagus (fig. 17) T-shaped, 1.4 timesbroader than long, 0.57 shorter than gonocoxite. Basistylar apodeme strong, curvingforward to join in flat-topped arch basal. Parameres without distinct backward-directedprocesses.Distribution. Argentina (northeastearn of the Buenos Aires Province. and MartinGarcia Island).Types. Argentina, Buenos Aires, Berisso, Los Talas, holotypeÇ, 29. XII. 1987, CR. Spinelli col., CDClight trap (MLP). Martin Garcia Island, allotypec?, 18/20.XI.1996, M. Coscarón col. (MLP). Paratypes 3 c? and 5Çasfollows: samedataasholotype,49; samedataasallotype, 3c?; PuntaLara.Ç, 7. IV. 1986, G.R. Spinelli col..CDC light trap (MLP).Etymology. The specific name is a patronym in honor of Jorge D. Williams inrecognition of his important help collecting ceratopogonids in Argentina.Discussion. Forcipomyia (M.) williamsi is very similar to F. (M.) furculaeDebenham, 1987, from Papua New Guinea. However, it can be distinguished from thelatter by the conspicuous apicolateral processes of the ninth tergum, ápices of gonostylusnot forked, and tip of the aedeagus pointed.REFERENCESBorkent, A. &Wirth,W. W. 1997. World species ofbiting midges (Diptera:Ceratopogonidae). Bull. Am. Mus.nat. Hist., New York, 233: 1 -257.Debenham, M. L. 1987a. The biting midge genusForcipomyia (Diptera: Ceratopogonidae) in the AustralasianRegion (Exclusive of New Zealand). I. Introduction, key to subgenera. and Thyridomyia and Trichoheleagroupsof subgenera. Invertebr. Taxon, Sydney, 1: 35-1 19..1987b. The biting midge genus Forcipomyia (Diptera: Ceratopogonidae) in the Australasian Region(Exclusive of New Zealand). II. Warmkea and the subgenera Thyridomyia Caloforcipomyia group ofsubgenera. Invertebr. Taxon, Sydney. 1: 167-199.Dow, M. I. & Wirth, W. W. 1972. Studies on the genus Forcipomyia, 2. The Nearctic species of the andSynthyridomyia (Diptera: Ceratopogonidae). Ann. ent. Soc. Am.. Lanham, 65: 1 77-201.Saunders, L. G. 1956. Revision of the genus Forcipomyia based on characters of all stages (Diptera:Ceratopogonidae). Can. J. Zool. . Ottawa. 34: 657-705.Spinelli, G. R. & Marino, P. I. 1997. Two new species of the subgenus Thyridomyia of Forcipomyia fromArgentina and new records ofF. (Synthyridomyia) sanctaeclarae (Diptera: Ceratopogonidae). Trans. Am.ent. Soc, Philadelphia, 123 ( 3 ): 1 87- 1 90..1998. First records for Argentina ofthree species ofForcipomyia ( Diptera: Ceratopogonidae). Revta Soc.ent. argent., LaPlata,57 (1-4): 39-40Spinelli, G. R. & Wirth, W. W. 1993. Los Ceratopogonidae de la Argentina (Insecta: Diptera). In: DlCastellanos, Z. A. ed. Fauna de Agua Dulce de la República Argentina. Buenos Aires. v. 38, fase. 3, p. 1 -124.Wirth, W. W. 1974. Family Ceratopogonidae. In: A catalogue of the Diptera of the Américas South of theUnited States.São Paulo, Museu de Zoologia, Universidade de São Paulo, fase. 14, p. 1 -89.Recebido em 22.06.1998; aceito em 06.10.1998.Iheringia, Sér. Zool., Porto Alegre, (86): 3-8, 4 jun 1999

The Subgenus Forcipomyia (Metaforcipomyia) In Argentina (Diptera, Ceratopogonidae)

http://sedici.unlp.edu.ar/bitstream/handle/10915/102538/Documento_completo.pdf?sequence=1

The Subgenus Forcipomyia (Metaforcipomyia) In Argentina (Diptera, Ceratopogonidae)

Abstract

Similar works

Full text

Available Versions

Servicio de Difusión de la Creación Intelectual