Ablabesmyia novema 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 : 89-95

Ablabesmyia novema Neubern sp. n.

( Figs 53–56 )

Type material. Holotype: ♂ with pupal exuvia, Brazil, São Paulo, São Carlos, Mayaca lake , 47°33`01``W – 21°58`02``S, 16.iii.2004, C.S.N. Oliveira — LEIA . Paratypes: ♂ with larval and pupal exuviae, São Paulo, São Carlos, Monjolinho reservoir, 48°05`00``W – 22°06`00``S, 29.iv.2004, C.S.N. Oliveira — LEIA ; ♂ with larval and pupal exuviae, same previous data— LEIA; ♂ with pupal exuvia, same previous data, L. Correia — DZUP ; ♂, São Paulo, Brotas, Dourada lake , 48°07`35``W – 22°17`12``S, 04.iii.2004, L. Correia — DZUP ; ♂, São Paulo, Luís Antônio, Ecological Station Jataí, Beija-Flor reservoir, 47°47`00``W – 21°34`00``S, 20.xi.2001, S. T . Strixino — DZUP .

Diagnostic characters. A. novema sp. n. differs from other species by combination of the following characters: Male —labrum with 1 seta, antepronotum with 18–19 lateral setae, R 3 apex close to C, tapered megaseta, grooved aedeagal blade, dorsal lobe club-shaped with fringe and gonostylus with 6 apical teeth; Pupa — apex of aeropyle tube club-shaped, thoracic horn with spines lateral outer border, dorsal pore in A IV between setae D 3 and D 5, genital sac ending beyond the second anal macrosetae, wing sheath with veins and spots; Larva —head capsule expanded and without spots, posterior parapod with 3 claws brown, procercus brown and with 9 anal setae.

Etymology. From Latin, novem, meaning nine, referring to the number of procercus anal setae.

Male (n = 5, unless otherwise stated): Dimensions: Total length 3.36–3.90 mm. mm. Wing length 1.71–1.95 mm. Total length/wing length 1.96–2.05. Wing length/length of profemur 2.52–2.55.

Coloration ( Figs 53A–E , 54A ): wings and abdomen follow figures 53A and 53E. Legs: P I —emora with 2 bands, tibiae with 4 bands; P II, P III —femora with 2 bands, tibiae with 3 bands. Ratio of bands, related tibiae and tarsomeres 1 follow table 40. Hypopygium: half gonocoxite brown and gonostylus base brown.

Head: antenna with 14 flagellomeres; AR 1.80–1.93; apical flagellomere 110–120 µm long and subapical seta 38 µm long; temporals 50–52; postoculars 9; coronal triangle 125 µm long and base 93 µm; clypeus bearing 20 setae, 105–113 µm long and 75–78 µm wide; labrum with 1 seta, 115–128 µm long and 50–55 µm wide; tentorium 150 µm long; cibarial pump 280–310 µm long and orifice 53–55 µm from apex; palpomeres 1–5: 48–50; 88–90; 133–148; 105–125; 205–250 µm long; palpomere 3 with sensilla capitata 28–38 µm from base.

Wing ( Fig. 53A ): width/lenght 0.28; VR 0.86; C 1.59–1.78 mm long; Sc 0.87–1.0 mm long; m-cu 49 µm long and 510–560 µm from arculus; fr 590–650 µm from arculus; R 3 apex close to C; brachiolum with 3 setae; squama with 37–40 setae.

Thorax: antepronotals 18–19; humerals 5–7; prealars 17–24; supraalar 1; scutelars 49–52.

Legs ( Fig. 53B–D ): P I —apex of tibia 43–55 µm wide and with apical pectinated spur 50–53 µm long, spur ratio 0.60–0.64; tarsomeres 1–2 with 1 or 2 pseudospurs 55–60 µm long. P II —apex of tibia 41–50 µm wide and with 2 apical pectinated spurs 55–65 and 38–50 µm long, spur ratio 0.49–0.54 and 0.36–0.54 respectively; tarsomeres 1–3 with 2 apical pseudospurs 44–53 µm long. P III –coxa with 7 central microsetae; apex of tibia 48–55 µm wide and with 2 apical pectinated spurs 55–73 and 45–58 µm long, spurs ratio 0.50–0.54 and 0.50–0.57 respectively; tarsomeres 1–3 with 1 or 2 apical pseudospurs 58–65 µm long. Lengths and proportions of leg segments table 41.

Hypopygium ( Fig. 54A–D ): tergite IX with 2–3 central setae; anal point completely covers the aedeagal complex; phallapodeme 38–48 µm long; arched sternapodeme 103–115 µm long; gonocoxite 130–153 µm long and 88–102 µm wide; gonostylus 140–160 µm long, with 6 apical teeth; tapered megaseta; HR 0.84–0.98; HV 2.40–2.44. Aedeagal complex: grooved aedeagal blade 31–41 µm long, base 9–13 µm, 9/10 6 µm; dorsal lobe with fringe and 18–20 µm long and base 9–15 µm; lateral lobe and basidorsal lobe present.

Female: unknown.

Pupa (n = 4, unless otherwise stated): Dimensions: male abdomen 4.50–4.76 mm long.

Coloration ( Fig. 55A–D ): exuviae brown, wing sheath with spots.

Cephalothorax ( Fig. 55A, B ): wing sheath 1.10 mm long and with complete veins; thoracic horn 415–469 µm long and 174–263 µm wide, lumen with hexagonal pattern, spines present only on the base, apex of aeropyle tube club-shaped; thoracic comb with 12–13 conical teeth.

Abdomen ( Fig. 55C, D ): shagreen as small spines in arc, present in A I–VIII; scar in A I 194–200 µm long; A IV chaetotaxy follow figure 55C, dorsal pore between setae D 3 and D 5; A VII with 4 lateral setae, LS 1 94–128 µm long; A VIII with 5 lateral setae, LS 1 85–94 µm long; anal lobe 395–406 µm long, base 294–375 µm wide, with 2 anal macrosetae LS 1 155–171 µm long, LS 2 208–223 µm long, outer border without spines; genital sac shorter than the anal lobe, 325 µm long and base with 225–269 µm; GS/AL 0.82.

Larva (n = 2, unless otherwise stated):

Dimensions: head capsule 1028–1031 µm long and 653–656 µm wide.

Coloration ( Fig. 56A–D ): head capsule yellow without spots; postoccipital margin brown; ligula teeth brown; procercus brown; posterior parapod with 16 claws, 3 hooked claws brown and 13 simple yellow claws.

Head Capsule ( Fig. 56A–C ): expanded, IC 0.71–0.73, chaetotaxy follow the figure 56A; AR 5.63–5.87, antennomeres 1,2-4: 528–531, 90–94 µm long; ring organ in A 1 290–294 µm from the base; maxillary palp with 2 segments, palpomeres 1-2: 50–54, 32–38 µm long; palpal formula 0+2, P 1 /P 2 1.40–1.56, A 1 /P 1 9.87–10.56, A 2 /P 1 1.73–1.80; mandible 160–163 µm long, with campaniform sensillum 28 mm from the base, A 1 /MD 3.26–3.30; dorsomental tooth 45–49 m long and far apart 65–69 mm, pseudoradula slightly granulated and with homogeneous width; ligula 98–100 mm long and 63–66 mm wide, with 5 teeth in concave arch, It/O 0.70–0.71; Mt/O 0.68–0.73; It/Li 0.24–0.25; muscle attachment of ligula 29 µm long and 68–69 mm wide; bifid paraligula 48–51 µm long, pectin hypopharyngis with 19 teeth.

Abdomen ( Fig. 56D ): procercus 101–103 µm long and 36–37 µm wide, 9 anal setae 718 µm long; supraanal seta simple and 454 µm long; supraanal seta lenght/ anal setae lenght 0.63; posterior parapods with 13 simple claws, with the slightly serrated sides and 3 hooked claws, with the smooth sides, claw with truncated base absent, tip of posterior parapods with little spines.

Figures

FIGURES 53A–E. Ablabesmyia novema sp. n.: adult male. (A) Wing; (B–D) P1 (B), P2 (C), P3 (D); (E) Abdomen.

FIGURES 54A–D. Ablabesmyia novema sp. n.: adult male. (A) Hypopygium: dorsal aspect; (B, C) Hypopygium: ventral aspect; (D) Aedeagal complex.

FIGURES 55A–D. Ablabesmyia novema 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 56A–D. Ablabesmyia novema 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.