Achradocera gimli, Quevedo & Capellari & Lamas, 2024

Quevedo, Lucas, Capellari, Renato S. & Lamas, Carlos José E., 2024, Taxonomic revision of Achradocera Becker (Diptera: Dolichopodidae), with description of two new species, Zootaxa 5519 (3), pp. 301-344 : 326-329

Achradocera gimli sp. nov.

( Figs 15 , 16 , 26 )

Diagnosis (male). Postpedicel longer than arista-like stylus; lower postoccipital setae dense. Legs mostly yellow, except for FIII, dorsal surface of FI and FII, TIII at basal 1/4 and apical 1/5, and distal tarsi, which are all brown infuscated; TI and TII rusty yellow; fore, mid and hind legs simple. Hypopygium small; surstylus subtriangular, tapered and bearing 1 apical and 1 subapical strong seta; postgonite enlarged and covered by small setae.

Description. Similar to A. angustifacies stat. rev., except as noted. Male. Body length: 2.1–2.4 mm. Wing: 2.0– 2.2 mm long, 0.7–0.8 mm wide. Antenna. Postpedicel longer than arista-like stylus; FAr ratio, 1.19. Thorax. About 6 ac and 5 dc pairs of setae. Wing. CuAx: 0.44; RMx: 1.7. Lower calypter pale yellow with fan of about 6 brownish setae. Leg I. 35, 37, 18, 14, 9, 5, 4. T rusty yellow due to brownish infuscation. Leg II. 33, 35, 19, 8, 6, 4, 3. T rusty yellow, with 1 ad seta at basal 1/3 and 4 setae apically (1 ad, 1 pd, 1 av and 1 pv). Leg III. 37, 42, 19, 9, 6, 4, 3. T brownish infuscated at basal 1/4, and apical 1/5, bearing 4 pd bristles along basal 3/5, and 2 ad setae between mid-length and apex, apex with 4 setae (1 av, 1 pv, 1 ad and 1 pd); tarsus simple. Hypopygium. As in Fig. 16A–D , similar to A. angustifacies stat. rev.

Female. Similar to males, except by MSSC and as noted. Body length: 2.0– 2.7 mm. Wing: 1.9–2.4 mm long, 0.7–1.0 mm wide. Terminalia. As in generic description (similar to Fig. 24 ).

Distribution. Brazil, Bolivia and Trinidad and Tobago ( Fig. 26 ).

Etymology. Same etymology as A. balin sp. nov., but Gimli was the honored Dwarf, and is from the book The Lord of the Rings (by J. R. R. Tolkien). This name should be treated as a noun in apposition.

Type material. HOLOTYPE ♂, labelled: “ BRASIL: PR: Colombo | Bairro Canguiri | 25º22′45.91″S 49º07′56.73″O | Malaise - 909 m | vi.2012 | Savaris, M. & Lampert, S. cols.” [ MZUSP] . PARATYPES: 3♂, 2♀, same data as holotype [ MZUSP] .

Additional material examined. Brazil. Goiás. 2♂, 1♀, “ BRAZIL, GO, Varjão | Chácara N. Sra. Aparecida | Malaise—Pomar | 17º01′52.04″ S- 49º33′17.39″ W | 12.vi.2018 – 08.vii.2018 | Col. Lopes, W. R.” ; 1♂, “ BRASIL, GO, Bom Jesus de Goiás | Fazenda Sta. Rosa do Meia Ponte | 18º19′42.7″S 49º36′08.3″W | Malaise trap; 20–22.xi.2021 | PR Riccardi leg.”. Mato Grosso do Sul . 1♂, “ Brasil: MT: Poconé | Fazenda Rio Clarinho | Trilha do Bosque ( Paratudal ) | S 16º36′16.8″ W 56º43′19.0″ | Malaise 50 | 26.xi–30.xii.2012 | Lamas, Nihei & eq. cols. | SISBIOTA | CNPq/FAPESP” ; 1♂, “ Brasil: MS: Corumbá | Passo do Lontra —B.E.P.— Mata | Ciliar ( Rio Miranda ) | S 19º34′31″ W 57º00′52″ | 03–06.viii.2021 —Malaise 11 | Lamas, Nihei & eq. cols.” [ USNM] ; 2♂, “ BRASIL, MS, Corumbá | B.E.P. | S 19º34′11.4″ W 57º01′08.5″ | 16–31.iii.2012 —Malaise 01 | Lamas, Nihei & eq. cols. | SISBIOTA | CNPq/ FAPESP” [ MTEC] ; 6♂, “ BRASIL, MS, Corumbá | B.E.P. | S 19º34’20.09” W 57º00’57.09” | Prato-Trans. Ciliar/ Paratudal | 05.viii.2011 | Lamas, Nihei & eq. cols.” [1♂ housed in USNM] ; 1♂, “ BRASIL, MS, Porto Murtinho | S21º40′59.7″ W57º46′42.5″ | Malaise 31 | 10–25.I.2012 | Lamas, Nihei & eq. cols.”, “SISBIOTA | CNPq/FAPESP” . Minas Gerais. 1♂, 1♀, “ BRASIL: MG: Cabo Verde | Fazenda da Cata —barranco | 21º27′11″S 46º20′52″W | Malaise | 01.x.2012 – 29.iii.2013 | Amorim, D. S. & eq. cols.”. Pernambuco . 1♂, “Brasil, PE, Camaragibe, | Aldeia, Km—8, 7º58′56″ S | 34º59′56″ W, 100 mts”, “ 05.viii.2015 J. A. Rafael & | P. C. Grossi, varredura”. Rio Grande do Norte . 1♂, 1♀, “Natal, RN | Brasil | VII.1955 | Pe. Pereira col.”. Roraima . 5♂, “ BRASIL, Roraima , Ilha de Maracá | Estação Ecológica de Maracá | 03º22′623″N 61º26′136″W, 101 m | 14–29.ix.2015, Arm. Malaise | Ponto 5, Trilha Santa Rosa | Biffi, Falaschi, Mandulão, Marinho | Pinheiro & Riccardi col.”. Bolivia . 2♂, “BOLIVIA: Santa Cruz Prov. | Campo Guairuy 24 km S | Camiri, 18.VIII–2.IX 2000 | S20º11.81′; W63º28.55′ | malaise trap, 870 m | M.E. Irwin & M. Hauser ”. Trinidad and Tobago . 4♂, “ TOBAGO: | Crown Point | airport area | 25 March 1985 | G. F. & J.F. Hevel. [ MZUSP] .

Remarks. The new species runs to “ A. femoralis ” using Parent (1933) key and is based on Becker’s (1922) description of that species (see Remarks under A. femoralis ).

Achradocera gimli sp. nov. has a wide and disjunct geographic distribution ( Fig. 26 ) and major variations are listed below. Bolivian specimens have entirely yellow FII (dorsally infuscated in type series); Northern Brazilian specimens (Roraima state) specimens appear to be smaller in size (in comparison with type series); and the Tobago specimens have a slightly different proportion between head and thorax (also in comparison with the type series). However, we believe that those characteristics are insufficient to reliably differentiate new species, because specimen preparation methods can modify coloration, while the life histories of those exemplars can change some subtle aspects, as well as body size. Thus, to be more conservative, we considered specimens from these regions as conspecific until further analyses may point to a different conclusion.

Figures

FIGURE 15. Achradocera gimli sp. nov. A. Habitus, left lateral. B. Head, left lateral. C. Thorax, dorsal. D. Wing. Scale bar: A, 1 mm; B–D, 0.2 mm.

FIGURE 16. Achradocera gimli sp. nov., male genital structures. A. Hypopygium, left lateral. B. Hypopygium, ventral. C. Phallus, ejaculatory apodeme and postgonite, left lateral. D. Postgonite, ventral. Scale bar: 0.1 mm.

FIGURE 24. Female genital structures of Achradocera arcuata [similar to genitalia of the other species]. A. dorsal view. B. left lateral view. Abbreviation list: cerc, cercus; T8, tergite 8; T9+10, fusion between tergite 9+10; S8, sternite 8. Scale bar: 0.1 mm.

FIGURE 26. Distribution map of the genus Achradocera.