Research Article |
Corresponding author: Rodrigo de Vilhena Perez Dios ( rodrigodios@gmail.com ) Academic editor: Pierfilippo Cerretti
© 2019 Rodrigo de Vilhena Perez Dios, Marcelo Domingos de Santis.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Dios RVP, de Santis MD (2019) A new synonym for Zelia Robineau-Desvoidy, 1830 (Diptera, Tachinidae), the genus Opsozelia Townsend, 1919, with the description of three new species. ZooKeys 880: 113-133. https://doi.org/10.3897/zookeys.880.35482
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The monotypic tachinid genus Opsozelia Townsend, 1919 (Diptera: Tachinidae) is synonymized with Zelia
description, Dexiinae, parasitoid, redescription, taxonomy
Zelia is a New World genus that was composed, prior to this study, of 19 species (
Zelia was enlarged by subsequent generic synonymies, as follows:
The genus Opsozelia was described in the tribe Zeliini by
The Zeliini were recognized as a tribe of 11 genera in the Americas south of the United States by
In the present paper, the monotypic genus Opsozelia is synonymized with Zelia. We also present a small diagnosis for Dexiini and some morphological characters that help identify Zelia. We recognize and characterize a group of species within Zelia that have at least two discal setae on abdominal tergites III and IV and call this group the Zelia discalis species group. This species group is revised and four Neotropical species are recognized: Z. discalis (Townsend) from Guyana and three new species from Brazil, namely Z. formosa sp. nov., Z. guimaraesi sp. nov. and Z. magna sp. nov. The new species are described, Z. discalis is redescribed, and an identification key to the males of this species group is provided. Descriptions and illustrations of the male terminalia of all species are presented for the first time. The female of Z. guimaraesi sp. nov. is described and illustrated.
The examined material was deposited at the following institutions: Museu de Zoologia, Universidade de São Paulo, São Paulo, Brazil (
Male terminalia were cleared in a 10% solution of KOH at room temperature for ca. 24 hours, then neutralized with acetic acid (10%) and washed with distilled water and a series of ethanol solutions at increasing concentrations. After examination, the terminalia were placed in plastic microvials filled with glycerin and pinned with their respective specimens. All specimens were measured with the software LEICA LAS version 4.1.0. Photographs were taken using a Leica DFC420 digital camera attached to a Leica MZ16 stereomicroscope, and the software LEICA LAS version 4.1.0. The images were subsequently stacked using Helicon Focus 5.3 and edited in Adobe Photoshop CS6. Illustrations were made using a Leica MZ16 stereomicroscope with camera lucida attached and edited in Adobe Illustrator CS6. Morphological terminology follows
Zelia Robineau-Desvoidy, 1830: 314. Type species: Zelia rostrata Robineau-Desvoidy, 1830 (= Dexia vertebrata Say, 1829), by subsequent designation of Coquillett, 1910: 621.
Leptoda van der Wulp, 1885: 196. Type species: Dexia gracilis Wiedemann, 1830 (= Dexia vertebrata Say, 1829), by subsequent designation of van der Wulp, 1891: 250.
Melaleuca van der Wulp, 1891: 213. Type species: Melaleuca spectabilis van der Wulp, by subsequent monotypy of van der Wulp, 1891: 247.
Metadexia Coquillett, 1899: 220. Type species: Metadexia tricolor Coquillett, 1899, by monotypy.
Euzelia Townsend, 1915: 23. Type species: Zelia wildermuthii Walton, 1914, by original designation.
Minthozelia Townsend, 1919: 556. Type species: Minthozelia montana Townsend, 1919, by original designation.
Opsozelia Townsend, 1919: 557. Type species: Opsozelia discalis Townsend, 1919 (= Musca lateralis Fabricius, 1805), by original designation, syn. nov.
The genus Zelia is a group with 19 valid species at present. This study began as a revision of the previously valid genus Opsozelia, but later it was recognized as a synonym of Zelia. Since the original intent of this study was not to revise Zelia, we were not able to examine all Zelia species. Therefore, we cannot provide a full description for the genus. Instead, we provide a small diagnosis for the genus, as well as some features for the Dexiini, modifying what was stated by
Zelia shares with Dexiini the following characters that, simultaneously, differs from other Tachinidae: compound eye bare (except for Callotroxis Aldrich, 1929 and Huascarodexia Townsend, 1919). Front narrow and without orbital setae in male, broad and with one proclinate orbital seta in female. Lunula bare. Frontal setae, forwardly directed or crossed, anteriorly reaching external angle of lunula, or slightly in front of it, but never descending to parafacial (except in Psecacera Bigot, 1880, Morphodexia Townsend, 1931 and Dasyuromyia Bigot, 1885). Facial carina absent. Antenna short, inserted at level or below half of compound eye height, thickened only at its base, often pubescent or plumose. Thorax with scutellum with decussate (rarely parallel) apical setae, normally without lateral setae. Abdominal sternites usually completely covered by ventrolateral margins of corresponding tergites.
Zelia differs from other Dexiini genera by the following combination of characters: Head silver pruinose (golden pruinose in Myiomima Brauer & Bergenstamm, 1889). Pedicel with one long seta and various setulae on its surface (in Neozelia Guimarães, 1975 with a tuft of long setulae). Postpedicel long, compressed laterally. Arista long plumose (bare in Psecacera). Facial carina absent (e.g., present in Platyrrhinodexia Townsend, 1927). Haustellum short, ca. 0.5× the head height (e.g., two or three times in Prosenoides Brauer & Bergenstamm, 1891). Thorax with proepisternum and prosternum bare (e.g., setulose in Tromodesiana Townsend, 1931). Intrapostalar seta absent. Scutellum with just regular setae (e.g., various upturned setae in Tropidopsiomorpha Townsend, 1927). Wing hyaline (smoky in in Yahuarmayoia Townsend, 1927; with maculae in Scotiptera Macquart, 1835). Costal spine undeveloped. Abdomen strongly pointed apically, especially in male (in Yahuarmayoia and Z. discalis species group is broad, excluding Z. formosa sp. nov.). Male abdomen somewhat elongate (not elongate in Ophirodexia Townsend, 1911). Abdominal tergites with just one row of setae (e.g., in Hystrichodexia Röder, 1886, two or three rows of discal setae). Tergite IV with three to five discals or without discals (e.g., with discal setae in sytergite I+II to V in Ptilodexia).
Justification for the synonymy of Opsozelia with Zelia and the Z. discalis group of species with at least two discal setae on tergites III and IV:
All of the examined species of the Z. discalis species group are similar to Zelia species, including the terminalia. These species do not present any outstanding morphological features that justify a separate genus. However, considering the difficulty in identifying the Neotropical Dexiini and Zelia species, we keep maintain species in their own species group for identification purposes. These species are easily recognized among other Zelia by the presence of at least two discal setae on abdominal tergites III and IV (other Zelia species without discal setae on these tergites).
Male holoptic and female dichoptic. Compound eye bare. Frontal vitta and ocellar triangle dark brown. Head light yellow to tawny, covered entirely with silver pruinosity. Minute proclinate setae on fronto-orbital plate. Parafacial bare. Ocellar setae proclinate and well differentiated from the adjacent setae; postocellar setae proclinate. Inner and outer vertical setae subparallel and convergent. No facial carina. Genal dilation with pale pruinosity and covered with black setulae. Facial ridge with small setulae near vibrissal insertion. Antenna inserted below middle of compound eye. Arista densely plumose. Strong and convergent vibrissae; four or five developed subvibrissal setae. Palpus cylindrical and a little clavate. Thorax brown to dark brown with silver or light golden pruinosity. Prescutum with four dark vittae, the two inner vittae thinner than the outer vittae. Prosternum and proepisternum bare. Notopleuron with two equal-sized setae. Two proepimeral setae. Two proepisternal setae. Three katepisternal setae, the lower one weaker. Postalar callus with two large and one smaller setae. Anepimeron with a single long seta. Anatergite bare. Katepimeron with setulae anteriorly. Costal spine absent. Vein M1 ending at wing margin close to tip. Abdomen conical, basally large and rounded, tapering to tip. Mid-dorsal depression on syntergite I+II reaching the posterior margin. Syntergite I+II and tergite III with one pair of median marginal setae. Tergite III and IV with 2–4 pairs of discal setae. Tergite IV with one row of median marginal setae and approximately ten discal seta decreasing in size anteriorly. Tergite V with one row each of marginal and discal setae. Sternites hidden. Male terminalia with cerci separated and pointed, larger basally. Surstylus broad, and usually rounded at tip, sometimes slightly pointed. Pregonite and postgonite fused as curved elongate structure, without a distinct separation; pregonite connected basally to the hypandrium by a membrane (sometimes thin, almost sclerotized). Epiphallus present, fused with basiphallus. Basiphallus varying in size. Distiphallus with extension of dorsal sclerite varying in size; dorsal sclerite ventrally serrulated; granular zone present, varying in size.
1 | Lower margin of face protruding below vibrissal angle; width of fronto-orbital plate 0.5× or less the height of gena | 2 |
– | Lower margin of face not protruding below vibrissal angle; width of fronto-orbital plate 0.8× or more the height of gena | 3 |
2 | Scutum with 4+3 acrostichal setae. Scutellum with two pairs of discal setae. Abdomen pale yellow, with median brown rounded vitta covering syntergite I+II, tergite III with small brownish black spot, at the insertion of the marginal median seta; posterior margin of tergite IV with a triangular spot, covering approx. the posterior ¼; tergite V entirely brownish black, without pruinosity | Zelia magna sp. nov. |
– | Scutum with 2+2 acrostichal setae. Scutellum with a single pair of discal setae. Abdomen pale yellow, with median brown longitudinal vitta covering syntergite I+II, continuing along the middle of the abdomen and ending at the middle of tergite V; posterior margin of tergite IV reddish brown; posterolateral margins of syntergite I+II and tergites III and IV with a brown spot; tergite V, reddish brown with silver pruinosity laterally | Zelia discalis (Townsend, 1919), comb. nov. |
3 | Thorax with postscutum with pale pruinosity only on the anterior region, not forming vittae; wing dorsally with vein R4+5 setulose for 1/4 of distance to crossvein dm-cu; abdominal syntergite I+II with one pair of median marginal setae; syntergite I+II to tergite IV pale yellow, each tergite with a brownish black vitta medially, broadening posteriorly (3× the width of the anterior portion) and with white pruinosity laterally | Zelia formosa sp. nov. |
– | Thorax with postscutum brown to dark brown with 4 vittae of silver pruinosity; the inner vittae half the length of the outer ones, neither reaching the scutellum; wing dorsally with setulae only on base of R4+5; abdominal syntergite I+II without median marginal setae; abdomen pale yellow, with median brown longitudinal vitta covering syntergite I+II, continuing along the middle of the abdomen to the end of tergite IV; tergite V entirely reddish black with silver pruinosity laterally | Zelia guimaraesi sp. nov. |
Opsozelia discalis
Townsend, 1919: 557. Holotype ♂ (
Holotype ♂: “Bartica, BG / VII.10.1901” “Type No. / 22237 / U.S.N.M.” “Opsozelia / discalis / ♂ T. Det CHTT”.
Suriname: [unreadable label], 1 ♂, 4.xi.1942 (
Frontal vitta width, in the narrowest point, narrower than ocellar triangle; postpedicel entirely yellow to orange; halter entirely pale yellow-tawny.
Body length : 12.0 mm.
Coloration : Occiput with long and pale setulae. Antenna yellow to orange. Palpus yellow-orange. Thorax with postscutum with four dark vittae, the inner vittae half the length of the outer, neither reaching the scutellum. Scutellum dark brown, with pale pruinosity posteriorly. Subscutellum with pale pruinosity. Wing hyaline, slightly light brown along the veins. Calypteres white-pale translucent. Halter pale yellow-tawny. Posterior spiracle light brown. Legs brown to tawny with silver pruinosity on coxae and femora; tarsi darker. Claws brown with tip darker. Abdomen pale yellow, with median brown longitudinal vitta covering syntergite I+II, continuing along the middle of the abdomen and ending at the middle of tergite V; posterior margin of tergite IV and tergite V reddish brown; posterolateral margins of tergites III, IV, and V with a brown spot.
Head : Frontal vitta at its widest point approx. as wide as the vertex in dorsal view. Frontal vitta, in the narrowest point, narrower than ocellar triangle. Fronto-orbital plate 17 pairs of proclinate setae minute proclinate setae; narrower than frontal-vitta and parafacial. Ocellar setae proclinate divergent. Orbital plate with three setulae. Postpedicel slender, 3× the combined length of scape and pedicel; arista plumose with two or three dorsal and one ventral rows; length of longest cilia ca. 7× basal width of arista. Facial ridge with ten or eleven setulae on lower third. Lower facial margin protruding, and visible in profile. Vibrissa long, inserted above lower facial margin. Prementum as long as palpus. Labella developed, little longer than 0.5× the prementum.
Thorax : Acrostichals 2+2. Dorsocentral 3+3. Intra-alar 1+2, first post-sutural weak; intra-postalar absent. Supra-alar 2+3, first post-sutural weak. Postpronotal lobe with four setae, three forming an anterior row and one posterior. Anepisternum with eight strong setae and two upwardly directed setulae anteriorly. Scutellum with one basal, one lateral, one weak subapical, one apical and one discal pairs of setae.
Wing : Base of R dorsally and ventrally setulose. M vein bent forward to R4+5, forming an angle slightly smaller than 90°, and convex after bend.
Legs : Fore coxa with many setae anteriorly; fore femur with dorsal and posteroventral rows of setae; fore tibia with two posterior setae and row of shorter anterodorsal setae. Mid femur with three posteroventral basal setae, three dorsal to posterodorsal preapical setae; mid tibia with one anteroventral median seta, two anterior median setae and two posterior median setae. Hind femur with three anteroventral setae on basal half and three ventral setae on basal half and with row of anterodorsal setae; one posterodorsal preapical setae; hind tibia with two anterior median, two anteroventral median and two posterodorsal median setae. Claws straight with the tip curved.
Abdomen : Syntergite I+II without pair of median margin setae. Tergite III with three discal setae decreasing in size anteriorly one median marginal seta and one lateral marginal seta. Tergite IV with four discal setae decreasing in size anteriorly a marginal row of median lateral. Ventral borders of tergites with a row of median setae.
Terminalia
(Fig.
Missing left vibrissa and right one broken in half. Missing right mid femur and so on; missing right trochanter and so on. Abdomen damaged, basally compressed and smashed, and with a rupture on the left side of tergite III.
Orbital plate with 2–7 setulae. Intra-alar - 2+3. Supra-alar - 2+4.
Suriname, Brazil (Pará, São Paulo and Santa Catarina states), and Paraguay (Amambay department).
Holotype
♂: BRAZIL: Rio de Janeiro, Nova Friburgo, Mury, xii.1980, Gred & Guimarães leg. (
Thorax with scutellum with two pairs of discals; abdomen pale yellow, syntergite I+II with median brown rounded vitta; tergite III with small brownish black spot, at the insertion of the marginal median seta; tergite IV posterior margin with a triangular spot, covering approx. the posterior ¼; posterolateral margins of syntergite I+II and tergites III and IV with a brown spot; legs dark brown; light brown claws; tergite V, entirely brownish black, without pruinosity; tergite VI and segment VII+VIII brownish black; largest species of the genus.
Body length : 17.8 mm
Coloration : Occiput with long and pale setulae. Antenna yellowish grey-dusted. Palpus yellow-orange. Thorax with postscutum with four dark vittae, the inner vittae half the length of the outer, neither reaching the scutellum. Scutellum dark brown, with pale pruinosity posteriorly. Subscutellum with pale pruinosity. Wing hyaline, slightly light brown along the veins. Calypteres slightly infuscated. Halter and posterior spiracle light brown. Legs brown with silver pruinosity on coxae and femora; tarsi darker. Claws brown with tip darker. Abdomen pale yellow, with median brown longitudinal vitta covering syntergite I+II, in tergite III a brownish black dot at the insertion of the median marginals, in tergite IV a brownish black triangular spot on the posterior region and in V; and tergite V entirely brownish black without pruinosity; posterolateral margin of tergite IV with a brown spot.
Head : Frontal vitta at its widest point ca. 1.2× as wide as the vertex in dorsal view. Frontal vitta, in the narrowest point, equal to bigger width than ocellar triangle. Fronto-orbital plate with 20 pairs of proclinate setae; broader than frontal-vitta and parafacial. Width of parafacial measured between inner margin of compound eye and antennal insertion is 2× the height of gena. Postpedicel slender, 2× the combined length of scape and pedicel; arista plumose with two to three dorsal and one ventral rows; length of longest cilia ca. 7× basal width of arista. Facial ridge with 16–14 setulae on lower third. Lower facial margin protruding, and visible in profile. Vibrissa long, inserted above lower facial margin. Prementum shorter than palpus. Labella developed, ca. 0.4× the prementum.
Thorax : Acrostichals 4+3. Dorsocentral 4+4. Intra-alar 2+3, first post-sutural weak; intra-postalar present. Supra-alar 2+3. Postpronotal lobe with five setae, four forming an anterior row and one posterior. Anepisternum with nine strong setae and two upward directed setulae anteriorly. Scutellum with one basal, one lateral, one weak subapical, one apical and two discal pairs of setae.
Wing : Base of R dorsally and ventrally setulose. M vein bent forward to R4+5, forming an angle bigger than 90°, and convex after bend.
Legs : Fore coxa with many setae anteriorly; fore femur with dorsal and posteroventral rows of setae; fore tibia with two posterior setae and row of shorter anterodorsal setae. Mid femur with three posteroventral basal setae, three dorsal to posterodorsal preapical setae; mid tibia with one anteroventral median seta, two anterior median setae and two posterior median setae. Hind femur with three anteroventral setae on basal half and three ventral setae on basal half and with row of anterodorsal setae; one posterodorsal preapical seta; hind tibia with two anterior median, two anteroventral median and two posterodorsal median setae. Claws straight with the tip curved.
Abdomen : Syntergite I+II without pair of median margin setae. Tergite III with three discal setae increasing in size anteriorly, one median marginal seta and two lateral marginal setae. Tergite IV with four discal setae increasing in size anteriorly and a marginal row of setae.
Terminalia
(Figs
Brazil, Rio de Janeiro, Nova Friburgo, Mury.
Brazil (Rio de Janeiro and São Paulo states).
The name refers to the size of this species, being the biggest of the species group. “Magna” (Latin) = large.
Holotype
♂: Brazil: Santa Catarina, Nova Teutônia, ii.1966, F. Plaumann col. (
Paratypes
: Brazil: Rio de Janeiro, Nova Friburgo, “Mury, Nova Friburgo / Rio de Janeiro – Br. / 12.xi.1970 / Gred & Guimarães col.” 1 ♂ (
Parafacial larger or equal to 1/3 of the head width; tergite V entirely reddish brown; facial ridge with only one to two setulae; halter stem dark yellow; wings smokier alongside the veins; frontal vitta larger.
Body length : 12.0 mm.
Coloration : Frontal vitta and ocellar triangle dark brown to black. Head light yellow to tawny covered entirely with silver pruinosity. Occiput with long and black setulae. Postpedicel orange, but distal ¼ brownish orange. Palpus yellow-tawny. Thorax brown to dark brown with silver or light golden pruinosity; scutum with four dark vittae, in prescutum the two inner vittae are thinner than the outer, in postscutum, the inner vittae half the length of the outer, neither reaching the scutellum. Scutellum dark brown, with pale pruinosity posteriorly. Subscutellum with pale pruinosity. Wing hyaline, slightly light brown along the veins. Calypteres slightly infuscated. Halter yellowish to brownish. Posterior spiracle light brown. Legs brown to tawny with silver pruinosity on coxae and femora; tarsi darker. Claws brown, pulvilum yellow. Abdomen pale yellow, with median brown longitudinal vitta covering syntergite I+II, continuing along the middle of the abdomen to the end of tergite IV; tergite V entirely reddish black.
Head : Frontal vitta at its widest point ca. 1.1× as wide as the vertex in dorsal view. Frontal vitta, in the narrowest point, equal to bigger width than ocellar triangle. Fronto-orbital plate with 12–13 pairs of proclinate setae; narrower than frontal vitta and parafacial. Postocellar proclinate. Orbital plate with six setulae. Width of parafacial measured between inner margin of compound eye and antennal insertion is 2× the width of gena. Postpedicel slender, 1.5× the combined length of scape and pedicel; arista plumose with two to three dorsal and one ventral rows; length of the ventral cilia longer than the dorsal, longest cilia ca. 7× basal width of arista. Facial ridge with two to three setulae on lower third. Lower facial margin not protruding, and invisible in profile. Vibrissa long, inserted above lower facial margin. Premuntum as long as palpus. Labella developed, little longer than 0.5× the prementum.
Thorax : Acrostichals 2–3+2. Dorsocentral 3+3–4. Intra-alar 1+2–3, first post-sutural weak; intra-postalar absent. Supra-alar 2+2–3, first post-sutural weak. Postpronotal lobe with four setae, three forming an anterior row and one posterior. Anepisternum with eight strong setae and with one to two upward directed setulae anteriorly. Scutellum with one basal, one apical and one discal pairs of setae.
Wing : Base of R dorsally and ventrally setulose. M vein bent forward to R4+5, forming an angle slightly smaller than 90°, and convex after bend.
Legs : Fore coxa with many setae anteriorly; fore femur with dorsal and posteroventral rows of setae; fore tibia with two posterodorsal setae and row of shorter anterodorsal setae. Mid femur with three anteroventral on apical third, tibia with two posterodorsal, two anterodorsal and one anteroventral setae, two dorsal, one ventral, one posteroventral and one anteroventral preapical setae; mid tibia with one anteroventral median seta, two anterior median setae and two posterior median setae. Hind femur with three anteroventral setae on basal half and three ventral setae on basal half and with row of anterodorsal setae; one posterodorsal preapical seta; hind tibia with two anterior median, two anteroventral median and two posterodorsal median setae. Claws straight with the tip curved, same length as 5th tarsomere.
Abdomen : Syntergite I+II without pair of median margin setae. Tergite III with two or none discal setae increasing in size anteriorly, one median marginal seta and one lateral marginal seta. Tergite IV with four discal setae increasing in size anteriorly and a marginal row of setae.
Terminalia
(Fig.
Female differs from male by the following
(Fig.
Terminalia
(Fig.
Brazil, Santa Catarina, Nova Teutônia.
Brazil (Rio de Janeiro, São Paulo and Santa Catarina states).
Z. guimaraesi sp. nov. is named in honor of the late Dr. José Henrique Guimarães, the former curator of Diptera at the
Holotype
♂: Brazil: Santa Catarina, Nova Teutônia, 1.ii.1961, F. Plaumann col. (
Paratype
: Brazil: Santa Catarina, Nova Teutônia, 1 ♂, i.1940, 1 ♀, 14.v.1963, F. Plaumann col. (
Postpedicel almost entirely brownish black, but 1/6 ventrally yellowish tawny; fronto-orbital plate entirely silvery pruinose; wing with a maculae in its base; R4+5 dorsally setulose for 1/4 of distance to cross vein dm-cu; postscutum, with pale pruinosity only on the anterior region, not forming vitta; syntergite I+II, with one pair of median marginal setae; abdomen with syntergite I+II to tergite IV pale yellow, with a brownish black vitta on middle, broadening posteriorly (three times the length of the anterior portion) and with white pruinosity on the lateral of each tergite.
Body length : 12.4 mm.
Coloration : Occiput with pale setulae. Postpedicel light brown, but proximal ¼ orange. Palpus yellow-orange. Postscutum, with pale pruinosity only on the anterior region, not forming vitta. Scutellum dark brown, with pale pruinosity posteriorly. Subscutellum with pale pruinosity. Wing hyaline, slightly light brown along the veins. Calypteres white-pale translucent. Halter and posterior spiracle light brown. Legs brown with silver pruinosity on coxae and femora; tarsi darker. Claws brown with tip darker. Abdomen pale yellow, with median brown longitudinal vitta covering syntergite I+II, in tergite III a brownish black dot at the insertion of the median marginals, in tergite IV a brownish black triangular spot on the posterior region and in V; and tergite V entirely brownish black without pruinosity; posterolateral margin of tergite IV with a brown spot.
Head : Frontal vitta at its widest point ca. 1.2× as wide as the vertex in dorsal view. Frontal vitta, in the narrowest point, equal to width than ocellar triangle. Fronto-orbital plate with 20 pairs of proclinate setae; broader than frontal-vitta and parafacial. Width of parafacial measured between inner margin of compound eye and antennal insertion is 2.5× the height of gena. Postpedicel slender, 2.2× the combined length of scape and pedicel; arista plumose with two or three dorsal and one ventral rows; length of longest cilia ca. 7× basal width of arista. Facial ridge with 14–16 setulae on lower third. Lower facial margin not protruding, and invisible in profile. Vibrissa long, inserted above lower facial margin. Premuntum shorter than palpus. Labella developed, ca. 0.4× the prementum.
Thorax : Acrostichals 4+3. Dorsocentral 4+4. Intra-alar 2+3, first post-sutural weak; intra-postalar present. Supra-alar 2+3. Postpronotal lobe with five setae, four forming an anterior row and one posteriorly. Anepisternum with nine strong setae and two upwardly directed setulae anteriorly. Scutellum with one basal, one lateral, one weak subapical, one apical, and two discal pairs of setae.
Wing : Base of R dorsally and ventrally setulose. M vein bent forward to R4+5, forming an angle slightly smaller than 90°, and convex after bend.
Legs : Fore coxa with many setae anteriorly; fore femur with dorsal and posteroventral rows of setae; fore tibia with one posterior seta and a row of shorter anterodorsal setae. Mid femur with two anteroventral, three posteroventral basal setae, three dorsal to posterodorsal preapical setae; mid tibia with one anteroventral median seta, two anterior median setae, one posteroventral median seta and four preapicals setae. Hind femur with three anteroventral setae on basal half and three ventral setae on basal half and with row of anterodorsal setae; one posterodorsal preapical setae; hind tibia with one anterior median, two very long anteroventral median and two posterodorsal median setae and one anteroventral and one posteroventral preapical setae. Claws straight with the tip curved.
Abdomen : Syntergites I+II with one pair of median marginal setae. Tergite III with three discal setae increasing in size anteriorly, one median marginal seta and two lateral marginal setae. Tergite IV with four discal setae increasing in size anteriorly and a marginal row of setae.
Terminalia : Tergite VI and segment VII+VIII yellowish tawny with silver pruinosity. The remaining of the terminalia of the only dissected male was lost in the preparation and cannot be described here.
Female differs from male by the following
(Fig.
Male terminalia. A–C Zelia discalis A epandrium, cerci and surstylus in posterior view B epandrium, cerci and surstylus in lateral view C hypandrium, phallapodeme, gonites and aedeagus in lateral view. D–F Zelia magna sp. nov. D epandrium, cerci and surstylus in posterior view E epandrium, cerci and surstylus in lateral view F hypandrium, phallapodeme, gonites and aedeagus in lateral view. G–I Zelia guimaraesi sp. nov. G epandrium, cerci and surstylus in posterior view H epandrium, cerci and surstylus in lateral view I hypandrium, phallapodeme, gonites and aedeagus in lateral view. Scale bars: 0.5 mm.
Brazil, Santa Catarina, Nova Teutônia.
Brazil (Santa Catarina state).
The name refers to the unique and abundant pruinosity in the thorax and abdomen. “Formosa” (Latin) = beautiful.
We would like to thank the curators Carlos Lamas (