<p> <strong> Neotropical <em> Ablabesmyia </ em> Johannsen (Diptera: Chironomidae, Tanypodinae) – Part I </ strong> </ p> Author Oliveira, Caroline Silva Neubern De csneubern@gmail.com Author Silva, Mário Antonio Navarro Da Author Gessner, Alaíde Aparecida Fonseca text Zootaxa 2013 2013-11-04 3733 1 1 123 http://dx.doi.org/10.11646/zootaxa.3733.1.1 journal article 10.11646/zootaxa.3733.1.1 1175-5326 5268657 EE758378-9459-4970-8D59-5258597A0E28 Ablabesmyia gessnerae Neubern sp. n. ( Figs 33–36 ) Type material. Holotype : ♂ with larval and pupal exuviae, Brazil , São Paulo , São Carlos , Monjolinho river , 47°05`00``W – 22°01`00``S , 30.iii.2004 , C.S.N. Oliveira — LEIA . Paratypes : ♂ with larval and pupal exuviae, same data holotype — LEIA ; 2 ♂♂ with larval and pupal exuviae, same data holotype — DZUP ; ♂ with pupal exuvia, São Paulo , São Carlos , Fazzari river , 47°52`00``W – 21°53`00``S , 10.iii.2005 , T . Siqueira — LEIA . Diagnostic characters. A. gessnerae sp. n. differs from other species by combination of the following characters: Male —antepronotum with 24–28 lateral setae, R 3 apex close to C, expanded megaseta, aedeagal complex with only one grooved aedeagal blade, dorsal lobe present; Pupa —apex of aeropyle tube T-shaped, lumen thoracic horn with hexagonal pattern only in the lateral, border anal lobe partially with spines and distal yellow; Larva —head capsule expanded and without spots, ligula teeth in concave arch, dorsal pore present, projections postoccipital margin present, palpal formula 0+2, procercus with 7 anal setae, posterior parapods with 2 claws brown. Etymology. Named after Dra. Alaíde Aparecida Fonseca Gessner, that contributed to the development of this paper and also to the knowledge of Neotropical Chironomidae . Male (n = 5, unless otherwise stated): Dimensions : Total length 4.02–4.28 mm . Wing length 1.87–1.93 mm . Total length/wing length 2.15–2.22. Wing length/length of profemur 2.25–2.33. Coloration ( Figs 33A–E , 34A ): wings and abdomen follow figures 33A and 33E. Legs: P I , P II —femora with 2 bands, tibiae with 4 bands; P III —femora with 1 band, tibiae with 4 bands. Ratio of bands, related tibiae and tarsomeres 1 follow table 24. Hypopygium: gonocoxite apex brown and gonostylus yellow. TABLE 24. Ratio of bands, related tibiae and tarsomeres 1 of A. gessnerae sp. n. , ♂, (n=5).

A/B	LMB/LBCB	Y/Z
P I	0.61–0.62	0.67–0.69	0.37–0.38
P II	0.60–0.64	0.78–1.00	0.40–0.41
P III	0.59–0.61	0.50–0.66	0.41–0.43

Head : antenna with 14 flagellomeres; AR 1.77–1.85; apical flagellomere 113–116 µm long and subapical seta 30–35 µm long; temporals 57–59; postoculars 9; coronal triangle 203–204 µm long and base 114–115 µm; clypeus bearing 29–33 setae, 75–95 µm long and 80–87 µm wide; labrum with 3 setae, 92–98 µm long and 45–59 µm wide; tentorium 169–175 µm long; cibarial pump 326–330 µm long and orifice 55 µm from apex; palpomeres 1–5 : 71–72; 95–99; 134–136; 170–177; 230–240 µm long; palpomere 3 with sensilla capitata 27–33 µm from base. Wing ( Fig. 33A ): width/lenght 0.30–0.32; VR 0.78–1.10; C 1.70–1.76 mm long; Sc 0.95–1.00 mm long; m-cu 49 µm long and 492–692 µm from arculus; fr 630–631 µm from arculus; R 3 apex close to C; brachiolum with 4 setae; squama with 44–46 setae. Thorax : antepronotals 24–28; humerals 10; prealars 31–35; supraalar 1; scutelars 30–32. Legs ( Fig. 33B–D ): P I —apex of tibia 60–61 µm wide and with apical pectinated spur 62–65 µm long, spur ratio 0.57–0.58; tarsomeres 1–3 with 1 or 2 pseudospurs 55–82 µm long. P II —apex of tibia 59–59 µm wide and with 2 apical pectinated spurs 68–70 and 48–50 µm long, spur ratio 0.45–0.50 and 0.52–0.55 respectively; tarsomeres 1–3 with 1 or 2 apical pseudospurs 65–77 µm long. P III —coxa with 5 central microsetae; apex of tibia 63–67 µm wide and with 2 apical pectinated spurs 71–72 and 54–55 µm long, spurs ratio 0.50–0.59 and 0.43–0.58 respectively; tarsomeres 1–3 with 1 or 2 apical pseudospurs 65–70 µm long. Lengths and proportions of leg segments table 25. FIGURES 33A–E. Ablabesmyia gessnerae sp. n. : adult male. (A) Wing; (B–D) P1 (B), P2 (C), P3 (D); (E) Abdomen. FIGURES 34A–D. Ablabesmyia gessnerae sp. n. : adult male. (A) Hypopygium: dorsal aspect; (B, C) Hypopygium: ventral aspect; (D) Aedeagal complex. FIGURES 35A–D. Ablabesmyia gessnerae 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 36A–D. Ablabesmyia gessnerae sp. n. : larva. (A) Head with chaetotaxy, right: ventral aspect, left: dorsal aspect; (B) Maxillary palp; (C) Ligula, paraligula and pecten hypopharyngis; (D) posterior parapod. TABLE 25. Lengths (in µm) and proportions of leg segments in A. gessnerae sp. n. , ♂, (n=5).

fe	ti	ta1	ta2	ta3	ta4
P I	831–846	892–969	708–710	492–500	369–375	261.5–269
P II	892–908	877–1031	710–754	400–415	288–308	210–261.5
P III	800–908	1077–1231	969–970	538–540	400–430	300–310

TABLE 25. (Continued)

ta5	LR	BV	SV	BR
P I	154–188	0.73–0.79	1.90–1.93	2.43–2.56	3.3–3.6
P II	115–169	0.80–0.86	2.20–2.46	2.37–2.51	7.7–8.0
P III	210–220	0.79–0.90	1.96–2.07	1.94–2.20	7.8–7.8

Hypopygium ( Fig. 34A–D ): tergite IX with 3 central setae; anal point completely covers the aedeagal complex; phallapodeme 45–56 µm long; sternapodeme 124–154 µm long; gonocoxite 157–185 µm long and 87–126 µm wide; gonostylus 166–169 µm long, with 6 apical teeth, expanded megaseta; HR 0.93–1.11; HV 2.38–2.58. Aedeagal complex: grooved aedeagal blade 35–37 µm long, base 20 µm, 9/10 3 µm; dorsal lobe 14–20 µm long and base 15–18 µm; lateral lobe and basidorsal lobe present. Female : unknown. Pupa (n = 5, unless otherwise stated): Dimensions : male abdomen 3.35–3.73 mm long. Coloration ( Fig. 35A–D ): exuviae brown, wing sheath with spots. Cephalothorax ( Fig. 35A, B ): wing sheath 1.38–1.51 mm long and with complete veins; thoracic horn 438–469 µm long and 180–200 µm wide, lumen with hexagonal pattern only in the lateral, spines present on the base and border, apex of aeropyle tube T-shaped; thoracic comb with 18 conical teeth. Abdomen ( Fig. 35C, D ): shagreen as small spines in arc, present in A I–VIII ; scar in A I 190–200 µm long; A IV chaetotaxy follow figure 35C, dorsal pore between setae D 1 and D 3 ; A VII with 4 lateral setae, LS 1 200–218 µm long; A VIII with 5 lateral setae, LS 1 94–125 µm long; anal lobe 406–439 µm long, base 382–438 µm wide, with 2 anal macrosetae, LS 1 188–194 µm long, LS 2 225–254 µm long, outer border with spines; genital sac shorter than the anal lobe, 319–346 µm long; GS/AL 0.78–0.79 Larva (n = 4, unless otherwise stated): Dimensions : head capsule 745–813 µm long and 575–631 µm wide. Coloration ( Fig. 36A–D ): head capsule yellow; postoccipital margin brown; ligula teeth brown; procercus brown; posterior parapod with 16 claws, 2 hooked claws brown and 14 simple claws yellow. Head Capsule ( Fig. 36A–C ): expanded, IC 0.76–0.78, postoccipital margin with central projections, chaetotaxy follow the figure 36A; AR 4.10–4.42, antennomeres 1,2-4 : 406–469, 99–106 µm long; ring organ in A 1 248–250 µm from the base; maxillary palp with 2 segments, palpomeres 1-2 : 33–40, 43–55 µm long; palpal formula 0+2, P 1 /P 2 0.64–0.77, A 1 /P 1 11.71–12.31, A 2 /P 1 2.38–2.70; mandible 132–154 µm long, with campaniform sensillum 28–31 mm from the base, A 1 /MD 2.64–3.60; dorsomental tooth 51–54 mm long and far apart 73–77 mm , pseudoradula slightly granulated and with homogeneous width; ligula 108–111 mm long and 52–66 mm wide, with 5 teeth in concave arch, It/O 0.86–0.95; Mt/O 0.71–0.79; It/Li 0.17–0.26; muscle attachment of ligula 31–35 µm long and 71–80 mm wide; bifid paraligula 54–60 µm long, pectin hypopharyngis with 18 teeth. Abdomen ( Fig. 35D ): procercus 100–108 µm long and 37–38 µm wide, 7 anal setae 620–625 µm long; supraanal seta simple and 520–524 µm long; supraanal seta lenght/ anal setae lenght 0.84; posterior parapods with 14 simple claws, with the serrated slightly sides and 2 hooked claws with the smooth sides, claw with truncated base absent, tip of posterior parapods with little spines.