Ablabesmyia laurindoi 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 : 74-80

Ablabesmyia laurindoi Neubern sp. n.

( Figs 43–46 )

Type material. Holotype: ♂ with larval and pupal exuviae, Brazil, São Paulo, São Carlos, Mayaca lake , 47°33`01``W – 21°58`02``S, 13.vi.2004, C.S.N. Oliveira — LEIA . Paratypes: ♂, São Paulo, Estação Ecológica Jataí, Infernão lake , 47°65`00``W– 21°34`00``S, 08.viii.1994, S. T . Strixino — LEIA ; 2 ♂♂, same previous data— DZUP ; 2 ♂♂, São Paulo, Estação Ecológica Jataí, Óleo lake , 47°52`00``W – 21°34`00``S, 10.i.2003, S. T . Strixino — LEIA ; 6 ♂♂, same previous data— DZUP ; 2 ♂♂, São Paulo, Estação Ecológica Jataí, Óleo lake , 25.v.2005, S. T . Strixino — DZUP ; ♂ with larval and pupal exuviae, São Paulo, Brotas, Dourada lake , 48°07`35``W – 22°17`12``S, 07.x.2003, S. T . Strixino — LEIA .

Diagnostic characters. A. laurindoi sp. n. differs from other species by the combination of the following characters: Male —tapered megaseta, dorsal lobe absent, aedeagal blade with broad base and aedeagal complex completely covered by anal point; Pupa —apex of aeropyle tube club-shaped, thoracic horn with spines in the outer lateral, dorsal pore in A IV between setae D 3 and D 5, genital sac 360 µm long, wing sheath with spots and complete veins; Larva —head capsule elongated and without spots, ligula teeth in concave arch, dorsal pore present, posterior parapod with 3 brown claws, procercus brown and with 7 anal setae.

Etymology. Named in honour of Dr. Fábio Laurindo da Silva, for his contribution to the knowledge of Neotropical Tanypodinae .

Male (n = 5, unless otherwise stated): Dimensions: Total length 4.59–5.12 mm. Wing length 2.37–2.56 mm. Total length/wing length 1.86–2.05. Wing length/length of profemur 2.64–2.73.

Coloration ( Figs 43A–E , 44A ): wing and thorax follow figures 43A and 43B. Legs: P I, P II, P III —femora with 3 bands, tibiae with 3 bands. Ratio of bands related tibiae and tarsomeres 1 follow table 32. Hypopygium: gonocoxite and gonostylus yellow.

Head: antenna with 14 flagellomeres; AR 2.0–2.65; apical flagellomere 123–133 µm and subapical seta 28–33 µm long; temporals 39–41; postoculars 16; coronal triangle 120–145 µm long and base 108–110 µm; clypeus bearing 32–37 setae, 125–128 µm long and 98–125 µm wide; labrum with 3 setae, 119–125 µm long and 60–78 µm wide; tentorium 175–190 µm long; cibarial pump 320–340 µm long and orifice 55–73 µm from apex; palpomeres 1–5: 58–75; 125–138; 143–158; 145–150; 290–380 µm long; palpomere 3 with sensilla capitata 30–53 µm from base.

Wing ( Fig. 43A ): width/lenght 0.28–0.29; VR 0.82–1.24; C 2.18–2.34 mm long; Sc 1.31–1.43 mm long; m-cu 49 µm long and 660–740 µm from arculus; fr 740–910 µm from arculus; R 3 apex close to C; brachiolum with 3 setae; squama with 50 setae.

Thorax ( Fig. 43B ): antepronotals 10; humerals 7; prealars 18; supraalar 1; scutelars 21.

Legs ( Fig. 43C–E ): P I —apex of tibia 60–65 µm wide and with apical pectinated spur 63–95 µm long, spur ratio 0.69–0.84; tarsomeres 1–2 with 1 or 2 pseudospurs 64–77 µm long. P II —apex of tibia 55–60 µm wide and with 2 apical pectinated spurs 65–85 and 52.5–63 µm long, spur ratio 0.60–0.74 and 0.53–0.62 respectively; tarsomeres 1–3 with 2 or 3 apical pectinated pseudospurs 77–82 µm long. P III –coxa with 6 central microsetae; apex of tibia 57.60– 65 µm wide and with 2 apical pectinated spurs 63–73 and 55–65 µm long, spurs ratio 0.69–0.72 and 0.67–0.75 respectively. Lengths and proportions of leg segments table 33.

Hypopygium ( Fig. 44A–D ): tergite IX with 4 central setae; anal point completely covers the aedeagal complex; phallapodeme 7.,50–75 µm long; sternapodeme 130–143 µm long; gonocoxite 155–163 µm long and 103 µm wide; gonostylus 178–188 µm long, with 4–5 apical teeth; tapered megaseta; HR 0.85–0.92; HV 2.56–2.89. Aedeagal complex: grooved aedeagal blade 45–50 µm long, base 23–28 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 4.12–4.18 mm long.

Coloration ( Fig. 45A–C ): exuviae brown, wing sheath with spots.

Cephalothorax ( Fig. 45A ): wing sheath 1.65–1.70 mm long and with complete veins; thoracic horn 575–579 µm long and 240 µm wide, lumen with hexagonal pattern, spines present on the base and sides, apex of aeropyle tube club-shaped; thoracic comb with 14 conical teeth.

Abdomen ( Fig. 45B, C ): shagreen absent; scar in A I 225 µm long; A IV chaetotaxy follow figure 45B, dorsal pore between setae D 3 and D 5; A VII with 4 lateral setae, LS 1 140 µm long; A VIII with 5 lateral setae, LS 1 98 µm long; anal lobe 469–471 µm long, base 110 µm wide, with 2 anal macrosetae LS 1 213 µm long, LS 2 268 µm long, outer side with spines; genital sac shorter than the anal lobe, 360 µm long; GS/AL 0.77.

Larva (n = 2, unless otherwise stated): Dimensions: head capsule 1000 µm long and 570 µm wide.

Coloration ( Fig. 46A–E ): head capsule yellow; postoccipital margin brown; ligula teeth brown; procercus yellow; ligula teeth brown, procercus brown, posterior parapod with 16 claws, 3 hooked claws brown and 13 simple claws yellow.

Head Capsule ( Fig. 46A–D ): elongated, IC 0.63, chaetotaxy follow the figure 46A; AR 4.61, antennomeres 1,2-4: 605, 131 µm long; ring organ in A 1 320 µm from the base; maxillary palp with 2 segments, palpomeres 1-2: 60 and 45 µm long; palpal formula 0+2, P 1 /P 2 1.33, A 1 /P 1 10.08, A 2 /P 1 1.93; mandible 155 µm long, with campaniform sensillum 33 mm from the base, A 1 /MD 3.90; dorsomental tooth 40 mm long and far apart 80 mm, pseudoradula slightly granulated and with homogeneous width; ligula 107.5 mm long and 75 mm wide, with 5 teeth in concave arch, It/O 0.91; Mt/O 0.82; It/Li 0.23; muscle attachment of ligula 37.5 µm long and 91 mm wide; bifid paraligula 57.5 µm long, pectin hypopharyngis with 18 teeth.

Abdomen ( Fig. 46E ): procercus 135 µm long and 34 µm wide, 7 anal setae 825 µm long; supraanal seta simple and 425 µm long; supraanal seta lenght/ anal setae lenght 0.52; posterior parapods with 13 simple claws with the serrated sides and 3 hooked claws, with the smooth sides, claw with truncated base present, tip of posterior parapods with spines.

Figures

FIGURES 43A–E. Ablabesmyia laurindoi sp. n.: adult male. (A) Wing; (B) Thorax; (C–E) P1 (C), P2 (D), P3 (E).

FIGURES 44A–D. Ablabesmyia laurindoi sp. n.: adult male. (A) Hypopygium: dorsal aspect; (B, C) Hypopygium: ventral aspect; (D) Aedeagal complex.

FIGURES 45A–C. Ablabesmyia laurindoi sp. n.: pupa. (A) Thoracic horn; (B) Abdominal segments 1-5, with chaetotaxy of segment 4, right: ventral aspect, left: dorsal aspect; (C) Abdominal segments 6-8 and anal lobe with male genital sac, right: ventral aspect, left: dorsal aspect.

FIGURES 46A–E. Ablabesmyia laurindoi sp. n.: larva. (A) Head with chaetotaxy, right: ventral aspect, left: dorsal aspect; (B) Maxillary palp; (C) Dorsomental tooth and pseudoradula; (D) Ligula, paraligula and pecten hypopharyngis; (E) posterior parapod.