Chvalaea ecuadoriensis Barros & Ale-Rocha

Barros, Luana Machado, Soares, Matheus Mickael Mota, Freitas-Silva, Rafael Augusto Pinheiro De & Ale-Rocha, Rosaly, 2019, Neotropical Chvalaea Papp & Földvári (Diptera: Hybotidae: Ocydromiinae): new records, an illustrated key to species and description of three new species, Zootaxa 4571 (3), pp. 347-362: 352-354

publication ID

https://doi.org/10.11646/zootaxa.4571.3.3

publication LSID

lsid:zoobank.org:pub:CE0B17D0-918E-4D18-AD39-A72E585F7038

persistent identifier

http://treatment.plazi.org/id/F3E09D58-4CD5-4064-A07B-E03C1927AC76

taxon LSID

lsid:zoobank.org:act:F3E09D58-4CD5-4064-A07B-E03C1927AC76

treatment provided by

Plazi

scientific name

Chvalaea ecuadoriensis Barros & Ale-Rocha
status

sp. nov.

Chvalaea ecuadoriensis Barros & Ale-Rocha   sp. nov.

( Figs 13 View FIGURES 13–14 , 27–32 View FIGURES 27–32 , 41 View FIGURES 37–42 , 49 View FIGURES 45–52 , 53 View FIGURE 53 )

Diagnosis. Frons broad (at mid-length about as wide as width of anterior ocellus) ( Fig. 13 View FIGURES 13–14 ). Scutum entirely brown, pleura yellow, except anepisternum and katepisternum brown; scutellum pale brown. Wing pale brown with vein M 1 evanescent just before meeting wing margin and vein M 4 reaching wing margin ( Fig. 49 View FIGURES 45–52 ). Legs extensively brownish ( Fig. 41 View FIGURES 37–42 ); hind tarsomeres 3–5 with short, blunt, black spine-like ventral setae. Hypandrium with distal margin sub-triangular ( Fig. 27 View FIGURES 27–32 ).

Description. Holotype male ( Fig. 41 View FIGURES 37–42 ). Body length: 5.7 mm. Wing length: 5.3 mm. Head. Frons broad (at mid-length about as wide as width of anterior ocellus), as long as 1/6 of face length ( Fig. 13 View FIGURES 13–14 ). Antenna brown; postpedicel about 1.5 times length of scape and pedicel combined, with dense brown microtrichia and 1 short, thin dorsal seta near base; stylus arista-like, about 1.5 times length of scape, pedicel and postpedicel combined; 1 pair of ocellar setae very short, proclinate. Proboscis brown and very short; palpus covered with dense yellow microtrichia and long, slender setae. Thorax. Covered with sparse reddish brown pruinosity, paler, almost yellow on pleura. Pronotum brown. Pleura yellow, except anepisternum and katepisternum brown. Scutellum pale brown with 1 pair of long, strong convergent apical setae, and 1 thin very short lateral seta, about 1/3 length of apical pair. Acrostichals and dorsocentrals uniserial, very short, slender and sparse on scutum; notopleuron with 1 long, strong seta, with 10 shorter, slender setae; 1 very short, slender anterior postalar seta, with 1 anterior [lost in holotype, slender in paratypes] and 1 posterior postalar seta [lost in holotype, strong in paratypes]. Wing. Pale brown; pterostigma brown, elongate, narrow; cell dm slightly shorter than basal cells; cell cua slightly shorter than half cell bm; CuA+CuP not reaching wing margin; vein M 1 evanescent, vein M 4 reaching wing margin ( Fig. 49 View FIGURES 45–52 ). Legs ( Fig. 41 View FIGURES 37–42 ). Extensively brown, except coxae yellow and femora pale brown near base, gradually darkened to brown apically. Chaetotaxy: fore tibia with 1 long and thin posteroventral seta at mid-length; mid tibia with 1 long and strong dorsal seta near base, 2 anterior on basal half and 2 anterior on apical half, 2 long posteroventral setae, with 1 on basal fourth and 1 on apical half; mid femur with 1 anterior seta on distal two-thirds; hind tibia with 2 long, thin anteroventral setae and 2 long, thin posteroventral setae on basal half; fore and mid tarsomere 1 with 1 ventral seta long and stronger near base; hind tarsomere 1 with 2 series of elongate black spine-like setae, with 5 anteroventral and 2 posteroventral near apex; hind tarsomeres 3–5 with short, blunt, black spine-like ventral setae.

Abdomen. Black, slender, slightly curved upwards, sides almost parallel in lateral view. Paratype male terminalia ( Figs 27–30 View FIGURES 27–32 ): similar to C. masneri   and C. catarinensis   , hypandrium narrow, distal margin sub-triangular with round apex and 2 long subapical setae ( Fig. 27 View FIGURES 27–32 ); subepandrial sclerite with anterior margin rounded and apical margin strongly concave ( Fig. 28 View FIGURES 27–32 ); hypoproct with broad, nearly triangular indentation at mid-width of apical margin ( Fig. 28 View FIGURES 27–32 ). Female. Similar to male. Female terminalia: resembling C. amazonica   , with sternite 8 broad, triangular; tergite 8 with notch on lateral margin ( Figs 31–32 View FIGURES 27–32 ).

Variation. Specimens preserved in alcohol can have fore and mid legs paler than hind leg.

Distribution. This species is known from Ecuador (Tungurahua) ( Fig. 53 View FIGURE 53 ).

Type material. HOLOTYPE GoogleMaps   ♂, labelled: ECUADOR, Tungurahua, Baños, Cloud Forest   GoogleMaps [1°23′20.3″S 78°25′42.8″W], 2.500–3.000 m, 12.x.1978, M. Cooper / Holotype, Chvalaea ecuadoriensis Barros & Ale-Rocha   [red label] ( NHM)   . Holotype in good condition, terminalia not dissected. PARATYPES: as data same as holotype (1 ♂, 1 ♀, INPA; 2 ♀, NHM)   .

Etymology. The specific epithet refers to the country of origin of all the type specimens of this species.

Remarks. Chvalaea ecuadoriensis   sp. nov. and C. masneri   are similar species, including the pronotum black, variable color of the pleura, usually the brown proepimeron. However, C. ecuadoriensis   sp. nov. is larger and more robust than C. masneri   , the scutum is uniformly brown, whereas in C. masneri   the scutum is dark brown to black. Chvalaea ecuadoriensis   sp. nov have an entirely brown hind tibia and in C. masneri   the hind tibia is black, yellowish near extreme base. Additionally, C. ecuadoriensis   sp. nov have the frons broad, while in C. masneri   the frons is very narrow.

NHM

University of Nottingham

INPA

Instituto Nacional de Pesquisas da Amazonia

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Hybotidae

Genus

Chvalaea