Ablabesmyia strixinoae 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 : 113-118

Ablabesmyia strixinoae Neubern sp. n.

( Figs 68–71 )

Type material. Holotype: ♂ with larval and pupal exuviae, Brazil, São Paulo, São Carlos, Mayaca lake , 47°33`01``W – 21°58`02``S, 16.vi.2004, C.S.N. Oliveira — LEIA . Paratypes: ♂, São Paulo, São Carlos, Estação Ecológica Jataí, Beija-Flor reservoir, 47°47`00``W – 21°34`00``S, 13.iv.1997, S. T . Strixino — LEIA ; 2 ♂♂, same previous data— DZUP ; 2 ♂♂, São Paulo, São Carlos, Estação Ecológica Jataí, Infernão lake , 47°65`00``W– 21°34`00``S, 30.ix.1995, S. T . Strixino — DZUP ; ♂, São Paulo, São Carlos, Parque Ecológico , 47°31`00``W – 21°53`00``S, 17.x.1997, S. T . Strixino — LEIA ; ♂ with larval and pupal exuviae, São Paulo, Brotas, Dourada lake , 48°07`35``W – 22°17`12``S 7.x.2003, S. T . Strixino — LEIA .

Diagnostic characters. A. strixinoae sp. n. differs from other species by combination of the following characters: Male —tapered megaseta, dorsal lobe absent, slender aedeagal blade, anal point present and gonostylus shorter than the gonocoxite; Pupa —apex of aeropyle tube club-shaped, thoracic horn with spines only in the base, dorsal pore in A IV between setae D 3 and D 5, genital sac ending beyond the second anal macrosetae, wing sheath with complete veins; Larva —head capsule expanded and with circular brown spots between the scars, cephalic chaetotaxy standard, ligula teeth in concave arch, palpal formula 0+2, ratio It/O 0.75 and brown claws with smooth sides.

Etymology. Named after Dra. Susana Trivinho-Strixino, who contributed to the development of this paper and also to the knowledge of Neotropical Chironomidae .

Male (n = 5, unless otherwise stated): Dimensions: Total length 3.12–4.45 mm. Wing length 2.18–2.53 mm. Total length/wing length 1.35–2.02. Wing length/length of profemur 2.51–2.77.

Coloration ( Fig 68A–E , 69A ): wings and abdomen follow figures 68A and 68E. Legs ( Fig. 68B–D ): P I, P II — femora with 3 bands, tibiae with 3 bands; P III —femora with 2 bands, tibiae with 3 bands. Ratio of bands, related tibiae and tarsomeres 1 follow table 52. Hypopygium: gonocoxite apex and gonostylus base brown.

Head: antenna with 14 flagellomeres; AR 1.77–1.85; apical flagellomere 113–125 µm long and subapical seta 33–38 µm long; temporals 33–38; postoculars 9–14; coronal triangle 145–185 µm long and base 80–93 µm; clypeus bearing 29–33 setae, 108–125 µm long and 85–102 µm wide; labrum with 3 setae, 105–115 µm long and 55–65 µm wide; tentorium 150 µm long; cibarial pump 310–350 µm long and orifice 60 µm from apex; palpomeres 1–5: 58–70; 107–123; 135–170; 128–143; 280–310 µm long; palpomere 3 with sensilla capitata 38–49 µm from base.

Wing ( Fig. 68A ): width/lenght 0.26–0.29; VR 0.74–0.80; C 1.96–2.31 mm long; Sc 0.93–1.37 mm long; m-cu 34 µm long and 630–700 µm from arculus; fr 800–937 µm from arculus; R 3 apex close to C; brachiolum with 5 setae; squama with 47–51 setae.

Thorax: antepronotals 13; humerals 5; prealars 19–27; supraalar 1; scutelars 19–23.

Legs ( Fig. 68B–D ): P I –apex of tibia 55–62 µm wide and with apical pectinated spur 44–73 µm long, spur ratio 0.51–0.52; tarsomeres 1–3 with 2 pseudospurs 37–78 µm long. P II —apex of tibia 49–53 µm wide and with 2 apical pectinated spurs 60–75 and 49–55 µm long, spur ratio 0.50–0.70 and 0.45–0.54 respectively; tarsomeres 1–3 with 2 or 3 apical pseudospurs 47.5–77.5 µm long. P III —coxa with 5 central microsetae; apex of tibia 55–60 µm wide and with 2 apical pectinated spurs 60–68 and 49–63 µm long, spurs ratio 0.58–0.59 and 0.56 respectively. Lengths and proportions of leg segments table 53.

Hypopygium ( Fig. 69A–D ): tergite IX with 2 central setae; anal point partially covers the aedeagal complex; phallapodeme 50–90 µm long; sternapodeme 135–158 µm long; gonocoxite 157–178 µm long and 100–133 µm wide; gonostylus 160–180 µm long, with 7 apical teeth; tapered megaseta; HR 0.92–1.07; HV 2.51–2.78. Aedeagal complex: grooved aedeagal blade 63–30 µm long, base 13–17 µm, 9/10 7.5 µm; dorsal lobe absent, lateral lobe and basidorsal lobe present.

Female: unknown.

Pupa (n = 2, unless otherwise stated): Dimensions: male abdomen 3.75 mm long.

Coloration ( Fig. 70A–D ): exuviae brown, wing sheath with spots.

Cephalothorax ( Fig. 70A, B ): wing sheath 1.43 mm long and with complete veins; thoracic horn 445 µm long and 215 µm wide, lumen with hexagonal pattern, spines present only on the base, apex of aeropyle tube clubshaped; thoracic comb with 10 conical teeth.

Abdomen ( Fig. 70C, D ): shagreen as small spines in arc, present in A; scar in A I 200 µm long; A IV chaetotaxy follow figure 70C, dorsal pore between setae D 3 and D 5; A VII with 4 lateral setae, LS 1 153 µm long; A VIII with 5 lateral setae, LS 1 65 µm long; anal lobe 400 µm long, base 365 µm wide, with 2 anal macrosetae LS 1 200 µm long, LS 2 238 µm long, both border with spines; genital sac shorter than the anal lobe, 260 µm long; GS/AL 0.65.

I–VIII

Larva (n = 2, unless otherwise stated): Dimensions: head capsule 820 µm long and 750 µm wide.

Coloration ( Fig. 71A–C ): head capsule yellow with circular brown spots between the scars; postoccipital margin brown; ligula teeth brown; procercus yellow; posterior parapod with 16 claws, 3 hooked claws brown and 13 simple yellow claws.

Head Capsule ( Fig. 71A–C ): expanded, IC 0.72, chaetotaxy follow the figure 71A; AR 5.07, antennomeres 1,2-4: 520, 103 µm long; ring organ in A 1 305 µm from the base; maxillary palp with 2 segments, palpomeres 1-2: 53 and 45 µm long; palpal formula 0+2, P 1 /P 2 1.17, A 1 /P 1 9.90, A 2 /P 1 1.80; mandible 138 µm long, with campaniform sensillum 33 mm from the base, A 1 /MD 3.78; dorsomental tooth 43 mm long and far apart 68 mm, pseudoradula slightly granulated and with homogeneous width; ligula 98 mm long and 52–66 mm wide, with 5 teeth in concave arch, It/O 0.75; Mt/O 0.70; It/Li 0.38; muscle attachment of ligula 33 µm long and 90 mm wide; bifid paraligula 55 µm long, pectin hypopharyngis with 18 teeth.

Abdomen: procercus 111 µm long and 31 µm wide, 7 anal setae 720 µm long; supraanal seta simple and 450 µm long; supraanal seta lenght/ anal setae lenght 0.62; posterior parapods with 13 simple claws with the serrated sides and 3 hooked claws with the smooth sides, claw with truncated base absent, tip of posterior parapods with spines.

Figures

FIGURES 68A–E. Ablabesmyia strixinoae sp. n.: adult male. (A) Wing; (B–D) P1 (B), P2 (C), P3 (D); (E) Abdomen.

FIGURES 69A–D. Ablabesmyia strixinoae sp. n.: adult male. (A) Hypopygium: dorsal aspect; (B, C) Hypopygium: ventral aspect; (D) Aedeagal complex.

FIGURES 70A–D. Ablabesmyia strixinoae sp. n.: pupa. (A) Wing; (B) Thoracic horn; (C) Abdominal segments 1-5, with chaetotaxy of segment 4, right: ventral aspect, left: dorsal aspect; (D) Abdominal segments 6-8 and anal lobe with male genital sac, right: ventral aspect, left: dorsal aspect.

FIGURES 71A–C. Ablabesmyia strixinoae sp. n.: larva. (A) Head with chaetotaxy, right: ventral aspect, left: dorsal aspect; (B) Maxillary palp; (C) Ligula, paraligula and pecten hypopharyngis.