Ablabesmyia commata Neubern, 2013

Oliveira, Caroline Silva Neubern De, Silva, Mário Antonio Navarro Da & Gessner, Alaíde Aparecida Fonseca, 2013, <p> <strong> Neotropical <em> Ablabesmyia </ em> Johannsen (Diptera: Chironomidae, Tanypodinae) – Part I </ strong> </ p>, Zootaxa 3733 (1), pp. 1-123 : 21-24

Ablabesmyia commata Neubern sp. n.

( Figs 8 , 9 )

Type material. Holotype: ♂, Brazil, Rio Grande do Sul, Jaquirana, Passo da Ilha, Tainha river , 50°21`28``W – 28°30`60``S, 10.xi.2007, L.M. Fusari — LEIA . Paratypes: ♂, same data as holotype— LEIA ; 2 ♂♂, Bahia, Feira de Santana, Seabra , 41°46`12``W – 12°25`08``S, 06.vi.2008, light trap, F. Bravo & S. Neto — LEIA ; 5 ♂♂, same previous data— CUFS ; 2 ♂♂, Bahia, Correntina, Correntina river , 44°38`13``W – 13°20`34``S, 01.xi.2008, L.M. Fusari — LEIA ; 2 ♂♂, same previous data— CUFS ; 2 ♂♂, same previous data— DZUP ; 3 ♂♂, Bahia, Feira de Santana, Pilão Arcado , 42°30`14``W – 10°00`10``S, 04.x.2006, light trap, R . Vieira — LEIA ; 3 ♂♂, same previous data— DZUP ; 12 ♂♂, same previous data— CUFS .

Diagnostic characters. Ablabesmyia commata sp. n. differs from other species by the combination of the following characters: antepronotal lobe with 15–19 setae, femora with 3 bands, middle and hind tibiae with 4 bands, tapered megaseta, grooved aedeagal blade, dorsal lobe club-shaped with fringe.

Etymology. From Latin, comma, meaning comma, referring to the shape of the aedeagal blade.

Male (n = 5, unless otherwise stated): Dimensions: Total length 2.96–5.06 mm. Wing length 2.00– 2.35 mm. Total length/wing length 1.48–2.15. Wing length/length of profemur 2.50–2.71.

Coloration ( Figs 8A–F , 9A ): wings, thorax and abdomen follow figures 8A, 8B and 8F respectively. Legs: P I, P II P III —femora with 3 bands, tibiae with 4 bands. Ratio of bands, related tibiae and tarsomeres 1 follow table 8. Hypopygium: gonocoxite apex and gonostylus base brown.

Head: antenna with 14 flagellomeres; AR 1.75–2.20; apical flagellomere 125–131 µm and subapical seta 40– 46 µm long; temporals 50–55; postoculars 11–14; coronal triangle 185–208 µm long and base 100–113 µm; clypeus bearing 33–49 setae, 115–126 µm long and 109–114 µm wide; labrum with 4 setae, 125–129 µm long and 65–77 µm wide; tentorium 190–207 µm long; cibarial pump 337–360 µm long and orifice 70–79 µm from apex; palpomeres 1–5: 49–64; 125–145; 100–169; 154–172; 400–430 µm long; palpomere 3 with sensilla capitata 51–54 µm from base.

Wing ( Fig. 8A ): width/lenght 0.28–0.30; VR 0.78–0.87; C 1.86–2.00 mm long; Sc 0.87–1.18 mm long; m-cu 28–36 µm long and 606–637.5 µm from arculus; fr 708–784 µm from arculus; R 3 apex close to C; brachiolum with 4 setae; squama with 47–52 setae.

Thorax ( Fig.8B ): antepronotals 15–19; humerals 11–15; prealars 23–34; supraalar 1; scutelars 31–46.

Legs ( Fig. 8C–E ): P I —apex of tibia 59–74 µm wide and with apical pectinated spur 57–76 µm long, spur ratio 0.55–0.67; tarsomeres 1–2 with 2 pseudospurs 66–87 µm long. P II —apex of tibia 53–71 µm wide and with 2 apical pectinated spurs 31–43 and 28–43 µm long, spurs ratio 0.53–0.57 and 0.56–0.64 respectively; tarsomeres 1–3 with 2, 3 or 4 pseudospurs 59–95 µm long. P III —coxa with 5 central microsetae; apex of tibia 58–66 µm wide and with 2 apical pectinated spurs 72–85 and 54–75 µm long, spurs ratio 0.54–0.58 and 0.53–0.59 respectively; tarsomeres 1–3 with 2 pseudospurs 69–81 µm long. Lengths and proportions of leg segments table 9.

Hypopygium ( Fig. 9A–D ): tergite IX with 2 central setae; anal point covers partially the aedeagal complex; phallapodeme 50–67 µm long; sternapodeme 100–145 µm long; gonocoxite 169–200 µm long and 117–148 µm wide; gonostylus 168–193 µm long and with 5 apical teeth; tapered megaseta; HR 0.99–1.16; HV 1.66–2.64. Aedeagal complex: grooved aedeagal blade 45–60 µm long and base 12–15 µm, 9/10 6–7 µm; dorsal lobe clubshaped with fringe, 21–29 µm long and base 15–27 µm, lateral lobe and basidorsal lobe present.

Female and immatures. Unknown.

Figures

FIGURES 8A–F. Ablabesmyia commata sp. n.: adult male. (A) Wing; (B) Thorax; (C–E) P1 (C), P2 (D), P3 (E); (F) Abdomen.

FIGURES 9A–D. Ablabesmyia commata sp. n.: adult male. (A) Hypopygium: dorsal aspect; (B, C) Hypopygium: ventral aspect; (D) Aedeagal complex.