Downeshelea marambaia Santarém & Borkent & Spinelli & Felippe-Bauer 2018, sp. nov.
Creators: name: Santarém, Maria Clara Alves
name: Borkent, Art
name: Spinelli, Gustavo
name: Felippe-Bauer, Maria Luiza
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Ceratopogonidae
Downeshelea
Downeshelea marambaia

description: Downeshelea marambaia sp. nov.   
(Figures 7a–d, 9e–g, 10)  
 Diagnosis   
 Male. The only species of Downeshelea in the Americas with the following combination of features: gonostylus 0.65–0.66 length of gonocoxite; parameres fused for 0.12 of total length; stem slightly curved, convergent distally, slightly enlarged apically, distal portion strongly curved (Figure 9g); aedeagus rectangular, basal arch shallow, extending to 0.17 of total length with two large elliptical sclerotised anteromesal areas (Figure 9f).   
 Female. Unknown.   
 Description   
 Male. Head. Eyes separated by a distance shorter than one ommatidia (Figure 7c); antennal ratio 1.00 (n = 1) (Figure 7b); palpal ratio 2.50 (n = 1) (Figure 7c).   
 Thorax. Brown, without definite pattern in slide-mounted specimens. Wing (Figure 7a) with greyish spot over CuA 2 reaching wing margin; 2 nd radial cell twice longer than 1 st; wing length 1.05 (n = 1) mm; breadth 0.37 (n = 1) mm; costal ratio 0.74 (n = 1). Halter knob brown, stem pale. Legs (Figure 7d) brown, hind femur darker apically, hind tibia with subbasal dark band. Fore-, hind tarsomere 1 with one basal, one apical spine; midtarsomere 1 with two basal, two apical, three other ventral spines; apical spines of tarsomeres 2–4 of fore-, mid-, hind legs: 2–2–3, 2–2–2, 1–1–1; fore tarsal ratio 2.25 (n = 1), mid tarsal ratio 2.52 (n = 1), hind tarsal ratio 2.24 (n = 1); claws 0.40 (n = 1) length of their respective tarsomere 5.   
 Abdomen. Dark brown. Terminalia (Figure 9e): tergite 9 with quadrate apex, apicolateral process elongate, slender, in bad condition in slide-mounted specimen (not illustrated); sternite 9 concave anteriorly, posterior margin in bad condition in slidemounted specimen (not illustrated). Gonocoxite 1.91–2.17 (2.04, n = 2) times longer than basal width; gonostylus delicate, 0.65–0.66 (0.65, n = 2) length of gonocoxite. Parameres (Figure 9g) 1.16–1.17 (1.16, n = 2) times longer than aedeagus, fused for 0.12 (n = 1) of total length; knob bulbous; stem nearly straight, convergent distally, slightly expanded apically, distal portion strongly curved, tapering to tip, 0.56 (n = 1) of total length. Aedeagus (Figure 9f) rectangular, enlarged distally, heavily sclerotised laterally, basal arch shallow, extending to 0.17 (n = 1) of total length with large elliptical sclerotised anteromesal areas reaching midlength of aedeagus; distal portion with deep mesal excavation terminating in two prominent sclerotised pointed serrate processes.   
 Female. Unknown.   
 Specimens examined   
 Holotype male adult, labeled ‘ Holotype Downeshelea marambaia Santarém, Borkent, Spinelli and Felippe-Bauer, BRAZIL, Rio de Janeiro, Itaguaí, 22 March 1990, FEEMA team col.’ (CCER). Paratype male labeled as holotype except Marambaia island, P. Armas, 29 October 1992, Quintelas col. (CCER).   
 Distribution and bionomics   
This species is restricted to Rio de Janeiro (Brazil) in coastal areas of the Itaguai municipality (Figure 10).  
 Etymology   
The name of this species refers to its distribution in Marambaia island, Rio de Janeiro, Brazil.
description: Published as part of Santarém, Maria Clara Alves, Borkent, Art, Spinelli, Gustavo & Felippe-Bauer, Maria Luiza, 2018, New Neotropical species of Downeshelea Wirth and Grogan and redescription of D. multilineata (Lutz) (Diptera: Ceratopogonidae), pp. 509-540 in Journal of Natural History (J. Nat. Hist.) (J. Nat. Hist.) 52 (9 - 10) on pages 535-536, DOI: 10.1080/00222933.2018.1437231, http://zenodo.org/record/5178489