Claudiotendipes froehlichi, Andersen & Mendes & Pinho, 2017

Andersen, Trond, Mendes, Humberto Fonseca & Pinho, Luiz Carlos, 2017, TWO NEW NEOTROPICAL CHIRONOMINAE GENERA (DIPTERA: CHIRONOMIDAE) Abstract, CHIRONOMUS Journal of Chironomidae Research 30 (30), pp. 26-54 : 33-37

Claudiotendipes froehlichi new species

http://zoobank.org/ 087B77F5-597F-46B0-A5B9- 0A96804EBC71

Type material: Holotype: BRAZIL, Bahia, Camacan, Serra Bonita , córrego 1, 15°23’28”S, 39°33’56”W, 820 m a.s.l., 31.vii.2008, Malaise trap, AR Calor, L Lecci, LC Pinho, RA Moretto, 1 male with larval and pupal exuviae (reared) (MZUSP) . Paratypes: BRAZIL, Bahia, Camacan, Serra Bonita , córrego 3, 15°23’02”S, 39°34’10”W, 805 m a.s.l., 01–04.viii.2008, Malaise trap, AR Calor, L Lecci, LC Pinho, RA Moretto, 2 males (MZUSP) ; as previous except córrego 2, 15°23’10”S, 39°34’03”W, 819 m a.s.l., 01.viii.2008, hand net, 1 male ( MZUFBA); as previous except Barreiras, Rio de Janeiro, Cachoeira Acaba Vida , 11°53’40”S, 45°36’06”W, 722 m a.s.l., 14.x.2008, light trap, AR Calor, RL Mariano, S Mateus, 1 male ( MZUFBA) . Rio de Janeiro: Teresópolis, P4A-P514, 22°26’51”S, 43°00’48”W, 1453 m a.s.l., E Shimabukuro, 1 male ( MZUSP) . São Paulo: Ubatuba, Pico do Corcovado, P 1M-C50, 23°27’52”S, 45°11’55”W, 222 m a.s.l., E Shimabukuro, 1 male ( MZUSP); Estação Ecológica Boracéia, Salesópolis, Rio Claro , poço Verde , 10.x.2004, light trap, CG Froehlich et al., 3 males ( ZMBN); as previous except 18.ix.2002, AS Melo, CG Froehlich, RL Mariano, A. Prather, R Blatnik, 1 male ( ZMBN); as previous except córrego Venerando, 12.xii.2001, CG Froehlich et al., 1 male ( MZUSP); as previous except Parque Estadual Campos do Jordão, Campos do Jordão, córrego Galharada , 22°41’40”S 45°27’36”W, 757 m a.s.l., 03.x–03.xi.2005, Malaise trap, MR Spies, 1 male ( INPA); as previous except 20.viii.2006, light trap, LS Lecci, 1 male ( INPA). Santa Catarina: Parque Estadual da Serra Furada, Grão-Pará , 28°11’28”S 49°23’30”W, 508 m a.s.l., #01, 13.x.2012, light trap, LC Pinho, AC Ganzer, LS Gomes, AG Parise, 1 male ( UFSC); Urubici , Rio Canoas , 28°01’41”S 49°22’36”W, 1014 m a.s.l., #29, 08.i.2013, light trap, LC Pinho, MC Novaes, MF Haddad, 3 males ( UFSC) .

Etymology: Like the genus name, the specific epithet honors Dr. Claudio G. Froehlich.

Diagnostic characters: See key.

Description

Male (n = 8–10, except when otherwise stated). Total length 2.33–3.05, 2.79 (6) mm. Wing length 1.39–1.99, 1.69 mm. Total length / wing length 1.63–2.05, 1.79 (6). Wing length / length of profemur 1.72–2.02, 1.88.

Coloration. All whitish, wings hyaline without markings.

Antenna. AR 0.91–1.13, 1.04. Ultimate flagellomere 407–514, 461 µm long.

Head ( Fig. 3A ). Temporal setae 9–13, 12; including 3–4, 4 inner verticals, 2–5, 4 outer verticals, and 3–4, 4 postorbitals. Clypeus with 9–14, 11 setae. Frontal tubercle indicated as paler area to small knob. Tentorium, stipes and cibarial pump as in Figure 3B . Tentorium 115–152, 136 µm long; 29–37, 33 µm wide. Stipes 106–118, 113 µm long; 27(1) µm wide. Palp segment lengths (in µm): 24–30, 27; 26–38, 35; 118–158, 140; 104–148, 128; 159–230, 197. Third palpomere with 2–4, 3 sensilla, longest 13–20, 15 µm long.

Thorax ( Fig. 3C ). Antepronotum with 0–1, 0 seta. Dorsocentrals 9–15, 11; acrostichals 6–13, 10, all decumbent, starting close to antepronotum; prealars 2–3, 2. Scutellum with 5–9, 6 setae, uniserial. Wing ( Fig. 3E ). VR 1.16–1.24, 1.21. Brachiolum with 1–2, 1 setae; R 15–24, 19; R 1 with 6–11, 9; R 4+5 with 23–36, 31 setae; other veins and cells bare. Squama bare.

Legs ( Fig. 3D ). Scale of fore tibia 6–9, 8 µm long; spur of mid tibia 41–52, 48 µm long; spur of hind tibia 47–66, 54 µm long. Comb on mid tibia 12– 20, 18 µm long; comb on hind tibia 16–27, 22 µm long. Width at apex of fore tibia 49–59, 54 µm; of mid tibia 48–57, 52 µm; of hind tibia 52–64, 58 µm. Lengths and proportions of legs as in Table 1 .

Hypopygium ( Figs 3F, G ). Tergite IX covered with microtrichia, with 3–6, 4 setae to each side of base of anal point; anal tergite bands ending slightly above base of anal point. Laterosternite IX with 0–3, 2 setae. Anal point weakly spatulate, 23–39, 28 µm long, 10–14, 13 µm wide at base, 4–6, 5 µm wide medially, 7–10, 8 µm wide near apex, Transverse sternapodeme 41–61, 53 (7) µm long, nearly straight. Phallapodeme 54–70, 67 (7) µm long. Gonocoxite 91–122, 106 (7) µm long. Superior volsella 38–48, 40 µm long, 11–15, 13 µm wide at base, 3–8, 4 wide at apex, with 2 dorsal and 2 lateral setae. Median volsella with 1–2, 1 setae. Inferior volsella 59–82, 64 µm long, 15–25, 19 µm wide at base, 6–9, 7 µm wide at apex, with 4–5, 5 simple setae, 1–2, 1 stout apical seta on main branch and 3–5, 4 apically split setae on side-branch. Gonostylus 96–120, 105 µm long. HR 0.85–1.13, 1.02 (7). HV 2.91–2.98 (3).

Female. Unknown.

Pupa (exuviae, n = 1). Total length 3.19 mm.

Coloration. Exuviae pale with brownish caudolateral spur.

Cephalothorax. Frontal apotome ( Fig. 4A ) subtriangular, 340 µm long, 296 µm wide. Frontal setae 144 µm long. Thorax ( Fig. 4B ) 695 µm long. Thoracic horn ( Fig. 4C ) with 4 branches. Dorsal antepronotal seta hair-like, about 53 μm long; lateral antepronotal hair-like, not measurable. Precorneals close together, hair-like, both about 30 μm long. Dc 1 31 μm long, Dc 2 35 μm long, Dc 3 33 μm long, Dc 4 21 μm long; Dc 1 1 μm in front of Dc 2, Dc 2 117 μm in front of Dc 3, Dc 3 29 μm in front of Dc 4. Wing sheath 1.07 mm long, without nose or pearl row.

Abdomen ( Fig. 4D ). Tergites I and IX bare; tergites II–IV with median field of fine shagreen and anterior band of slightly stronger shagreen, tergite IV with median field barely separated from anterior band; tergite V with continuous median, fine shagreen; tergite VI with widely separated anterior and posterior transverse fields of fine shagreen; tergites VII–VIII with anterolateral patches of fine shagreen. Sternites bare. Hook row on tergite II with 26 caudal hooklets in single, 148 μm wide row. Conjunctive IV/V with about 120 spinules in 4–5 rows. Pedes spurii B well developed posteriorly on segment II; pedes spurii A lacking. Segment VIII caudolateral spur ( Fig. 4E ) 160 μm long, with 3 strong apical teeth.

Abdominal setation. Segment I without L setae, segment II with 2–3 non-taeniate L setae, segments III–IV each with 3 non-taeniate L setae, segments V–VIII each with 4 taeniate LS setae. Dorsal and oral (‘O’) setae apparently present on segments II–VII, segments I and VIII apparently each with single pair of dorsal setae.

Anal lobe. Fringe with 18 taeniae. Male genital sac overreaches anal lobe by 76 μm.

Larva (cast skin, n = 1). Total length not measurable. Head capsule 340 µm long. Postmentum 115 µm long.

Coloration. Head capsule yellowish brown with postoccipital margin, teeth of mandible and lateral teeth of mentum darker brown.

Head. Antenna as in Figure 5B . Antenna with 6 segments; AR 1.06; length of antennal segments (in µm): 113, 35, 37, 8, 17, 10; blade 73 µm long; Lauterborn organs about 8 µm long; ring organ 58 µm from base in first segment. Pecten epipharyngis ( Fig. 5C ) consisting of single plate with 12 teeth; 17 µm wide. Premandible ( Fig. 5D ) 81 µm long. Mandible ( Fig. 5E ) 94 µm long with pale dorsal tooth and 3 inner teeth. Seta subdentalis well developed; seta interna with 2 main branches. Mentum ( Fig. 5A ) 83 µm wide, with 8 pairs of mental teeth; median pair short, pale yellowish brown; first lateral about twice as long, pale yellowish brown; second lateral about equally long, darker brown; third lateral about three times as long as median, darker brown; 4–7 lateral pairs gradually shorter, darker brown. Ventromental plate ( Fig. 5A ) curved, 66 µm wide, distance between plates 35 µm.

Abdomen. Procercus with 12 anal setae. Posterior parapods each with 13 claws.

Distribution and ecology

This species is apparently widely distributed along the Atlantic rainforest in Brazil, ranging from 220 m to over 1450 m altitude between latitudes 11° and 28°S. The larva was collected in leaf debris in a first order stream which flows through a forested area in Serra Bonita, Bahia State. Similar conditions occur at other localities where adults were collected in light or Malaise traps.

Figures

Figure 3. Claudiotendipes froehlichi n. sp., male.A, Head. B, Tentorium, stipes and cibarial pump. C, Thorax. D, Apex of fore tibia. E, Wing. F, Hypopygium, dorsal view. G, Hypopygium with anal point and tergite IX removed, dorsal aspect to the left and ventral aspect to the right.

Figure 4. Claudiotendipes froehlichi n. sp., pupa. A, Frontal apotome. B, Thorax. C, Thoracic horn. D, Abdomen. E, Caudolateral spur.

Figure 5. Claudiotendipes froehlichi n. sp., larva. A, Mentum and ventromental plates. B, Antenna. C, Pecten epiphar- yngis. D, Premandible. E, Mandible.