Downeshelea jarina, Santarém & Borkent & Spinelli & Felippe-Bauer, 2018

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), Journal of Natural History (J. Nat. Hist.) 52 (9 - 10), pp. 509-540 : 526-528

publication ID	https://doi.org/ 10.1080/00222933.2018.1437231
publication LSID	lsid:zoobank.org:pub:9FC2A016-1295-4047-877E-BC9030BD2BD2
persistent identifier	https://treatment.plazi.org/id/1BE87A41-D279-4E50-9D48-B2CA440416A2
taxon LSID	lsid:zoobank.org:act:1BE87A41-D279-4E50-9D48-B2CA440416A2
treatment provided by	Felipe
scientific name	Downeshelea jarina
status	sp. nov.

Treatment

Downeshelea jarina sp. nov.

( Figures 5a–h View Figure 5 , 9a–b View Figure 9 , 10 View Figure 10 )

Diagnosis

Male. The only species of Downeshelea in the Americas with the following combination of features: gonostylus 0.54–0.64 length of gonocoxite; parameres fused for 0.10–0.17 of total length; stem basolaterally expanded, more slender and convergent distally; distal portion stout, nearly straight, heavily sclerotised ( Figure 9b View Figure 9 ); aedeagus subtriangular, basal arch U-shaped, extending to 0.22–0.28 of total length ( Figure 9a View Figure 9 ).

Female. The only species of Downeshelea multilineata group in the Americas with small wing (0.92–1.02 mm) ( Figure 5d View Figure 5 ); midtarsomere 1 with 3–6 ventral spines; hind tibia darker on proximal third and apical portion; two slightly unequal spermathecae ( Figure 5h View Figure 5 ).

Description

Male. Head. Eyes slightly contiguous in lower area; antennal ratio 0.88–0.97 (0.93, n = 7); palpal ratio 2.25–2.75 (2.57, n = 7) ( Figure 5b View Figure 5 ).

Thorax. Brown, without definite pattern in slide-mounted specimens. Wing ( Figure 5a View Figure 5 ) with greyish spot over CuA 2 extending to wing margin; 2 nd radial cell 2.5 times longer than 1 st; wing length 0.85–0.95 (0.92, n = 7) mm; breadth 0.30–0.35 (0.32, n = 7) mm;

costal ratio 0.73–0.79 (0.77, n = 7). Halter pale, distal portion of knob darker. Legs

( Figure 5c View Figure 5 ) pale brown, apex of fore tibia slightly darker; hind femur darker subapically,

hind tibia darker on proximal third and apical portion. Fore-, hind tarsomere 1 with one

basal, one apical spine; mid tarsomere 1 with two basal (one in some specimens), two

apical, 3–4 other ventral spines; apical spines of tarsomeres 2–4 of fore-, mid-, hind legs:

1–1–1; 2–2–1, 1–1–1; fore tarsal ratio 2.18–2.37 (2.30, n = 7), mid tarsal ratio 2.50–2.73

(2.60, n = 7), hind tarsal ratio 2.08–2.29 (2.10, n = 6); claws 0.38–0.54 (0.46, n = 7) length

of their respective tarsomere 5.

Abdomen. Dark brown. Terminalia ( Figure 9a View Figure 9 ): tergite 9 with apex nearly rounded, apicolateral process short, broad; sternite 9 nearly straight anteriorly, posterior margin with moderately convex median lobe bearing 4–6 long setae. Gonocoxite 2.04–2.36 (2.22, n = 7) times longer than basal width; gonostylus with blunt tip, 0.58–0.64 (0.60, n = 7) length of gonocoxite. Parameres ( Figure 9b View Figure 9 ) 1.0-1.09 (1.05, n = 7) times longer than aedeagus, fused for 0.10–0.17 (0.15, n = 7) of total length; knob bulbous; stem basolaterally expanded, more slender and convergent distally; distal portion stout, nearly straight, heavily sclerotised, 0.54–0.62 (0.60, n = 6) of total length. Aedeagus subtriangular, heavily sclerotised laterally, hyaline on midportion, basal arch U-shaped, extending to 0.22–0.28 (0.25, n = 7) of total length; distal portion with moderately deep mesal excavation terminating in two sclerotised pointed serrate processes.

Female. Similar to male with usual sexual differences; antennal ratio 1.05–1.10 (1.08, n = 5) ( Figure 5e View Figure 5 ); palpus as in Figure 5g View Figure 5 , palpal ratio 2.20–2.75 (2.38, n = 5); mandible with 9–10 teeth. Wing as in Figure 5d View Figure 5 ; wing length 0.92–1.02 (0.98, n = 5) mm; breadth 0.37–0.42 (0.41, n = 5) mm; costal ratio 0.79–0.81 (0.80, n = 5). Fore-, hind tarsomere 1 with one basal and one apical spine; midtarsomere 1 with two basal, two apical, 3–6 other ventral spines; apical spines of tarsomeres 2–4 of fore-, mid-, hind legs: 1–1–1, 2–2–1, 1–1–2; fore tarsal ratio 2.35–2.60 (2.50, n = 5), mid tarsal ratio 2.59–2.78 (2.67, n = 5), hind tarsal ratio 2.23–2.40 (2.31, n = 5); fore, mid- leg claws 0.53–0.67 (0.60, n = 5) length of their respective tarsomeres 5; hind leg claw, about 1.17–1.31 (1.25, n = 5) as long as tarsomere 5 ( Figure 5f View Figure 5 ). Abdomen with genital sclerite broad in distal portion, tapered to rounded tip anteriorly. Two slightly unequal spermathecae ( Figure 5h View Figure 5 ), measuring 50–60 (56, n = 4) by 43–55 (50, n = 5) µm and 45–55 (51, n = 5) by 40–50 (46, n = 3) µm. Third rudimentary spermatheca present, nearly 5 µm.

Specimens examined

Holotype male adult, labeled ‘ Holotype Downeshelea jarina Santarém, Borkent, Spinelli and Felippe-Bauer , COSTA RICA, Guanacaste, Cuajiniquil, Playa Ostional , 05m, 13–16 June 2004. B. Gamboa, D. Briceno, M. Moraga, Y. Cardenas. Amarilla. LN219450 350300 #77437’ ( MNCR); allotype female adult, labeled ‘ Allotype Downeshelea jarina Santarém, Borkent, Spinelli and Felippe-Bauer’, same data as holotype except Malaise ( MNCR) . Paratypes labeled as follows: 5 males, 4 females, same data as holotype (2 males, 2 females CCER; 3 males, 2 females MNCR); 1 male, 4 females, same data as allotype ( CNCI); 2 females, same data except ‘manglar, intersección’ ( MNCR); 1 male, ‘ Puntarenas, Camaronal, Puesto MINAE, 5m, 19–24 June 2004, Malaise, B . Gamboa, D. Briceno, M. Moraga, Y. Cardenas’ ( MNCR) .

Distribution and bionomics

This species is restricted to Costa Rica (Guanacaste and Puntarenas provinces) ( Figure 10 View Figure 10 ) . It has been found in coastal and mangrove areas, occurring 5 m above sea level.

Etymology

The name of this species reflects the name of the tree Enterolobium cyclocarpum (Jacq.) Griseb. that is a symbol of Costa Rica and Guanacaste province, where the majority of type specimens were found . The tree is commonly known in Costa Rica as ‘árbol de Guanacaste’ and/or jarina .