Pseudosmittia lamellata, Andersen & Saether & Mendes, 2010

Andersen, Trond, Saether, Ole A. & Mendes, Humberto F., 2010, Neotropical Allocladius Kieffer, 1913 and Pseudosmittia Edwards, 1932 (Diptera: Chironomidae) 2472, Zootaxa 2472 (1), pp. 1-77 : 51-53

Pseudosmittia lamellata sp. n.

( Figs 136–141 )

Pseudosmittia sp. 4 Pinho et al. (2009: 164).

Type material. Holotype male, BRAZIL: São Paulo State, Cananéia , restinga ( GITA), 25º01'59''S, 44º47'7.9''W, 9 m a.s.l., 16.ii.2002, Malaise trap, F.O. Roque ( MZUSP) . Paratypes: 1 male, São Paulo State, Parque Estadual Serra do Mar, Ubatuba , 23º21'43''S, 44º59'22''W, 24.i.2002, Malaise trap (Bosque 6), N.W. Perioto et al. (BRUB11: BIOTA-FAPESP) ( ZMBN) ; 1 male, Estação Ecológica Juréia-Itatins, Peruíbe , 24º31'06''S, 47º12'06''W, 6.v.2002, Malaise trap (Trilha 3), N.W. Perioto et al. (PEJU16: BIOTA-FAPESP) ( ZMBN) ; 1 male, as previuos except Malaise trap (Bosque 9) (PEJU13: BIOTA-FAPESP) ( MZUSP) . 1male, Rio de Janeiro State, Reserva Biológia Tinguá, Nova Iguaçu , 22º34'37''S, 43º26'06.6''W, 8–11.iii.2002, Malaise trap (Bosque 1), S.T.P. Amarante et al. (BRTIN07: BIOTA-FAPESP) ( ZMBN) ; 1 male, as previous except 22º34'30''S, 43º26'07''W, 5–8.iii.2002, Malaise trap (Trilha 4), (BRTIN09: BIOTA-FAPESP) ( ZMBN) ; 2 males, as previous except (BRTIN12: BIOTA-FAPESP) ( MZUSP) ; 2 males, as previous except 22º34'28''S, 43º26'09''W, Malaise trap (Trilha 5), (BRTIN11: BIOTA-FAPESP) ( MZUSP) ; 4 males, as previous except 22º34'32''S, 43º26'06.6''W, 8–11.iii.2002, Malaise trap (Trilha 3), (BRTIN13: BIOTA-FAPESP) ( MZUSP, ZMBN) ; 1 male, as previous except 22º34'27''S, 43º26'11.4''W, 5–8.iii.2002, Malaise trap (Trilha 6), (BRTIN14: BIOTA-FAPESP) ( ZMBN) ; 2 males, as previous except 22º34'32''S, 43º26'07.6''W, 8–11.iii.2002, Malaise trap (Bosque 3), (BRTIN18: BIOTA-FAPESP) ( ZMBN) . 3 males, Bahia State, Reserva de Sapiranga, Mata de São João , 12º33'36.4''S, 38º02'57.2''W, 19–22.vii.2001, Malaise trap (Bosque 3), M.T. Tavares et al. (BRBA5x: BIOTA-FAPESP) ( MZUSP, ZMBN) ; 2 males, as previous except 12º33'41.7''S, 38º02'42.9''W, Malaise trap (Bosque 2) (BRBA9x: BIOTA-FAPESP) ( ZMBN) . 3 males, Amazonas State, Manaus, Reserva Soka Gakkai, ( Lago ), 12–14.ii.2008, Pennsylvania trap, N. Hamada et al. ( INPA, ZMBN) .

Diagnostic characters. The species differs from other members of the genus except P. tropis sp. n. by having a long virga with lateral lamellae. It differs from P. tropis by having a more curved gonostylus without outer corner.

Etymology. From Latin, lamellatus, equipped with plates, referring to the lateral lamellae of the virga.

Male (n = 8–10, except when otherwise stated). Total length 0.99–1.45, 1.21 mm. Wing length 0.57–0.78, 0.66 mm. Total length / wing length 1.60–1.99, 1.77 (7). Wing length / length of profemur 2.52–2.90, 2.76.

Coloration. Dark brown.

Head. Ultimate flagellomeres 10–13 partially to completely fused, when partially fused and considered as 13 flagellomeres, AR 0.35–0.85, 0.65 and ultimate flagellomere 103–241, 185 µm long; when fused and considered as 12 flagellomeres, AR 0.70 (1) and ultimate flagellomere 166 (1) µm long; as 11 flagellomeres, AR 0.65 (1) and ultimate flagellomere 154 (1) µm long; as 10 flagellomeres, AR 0.67 (1) and ultimate flagellomere 158 (1) µm long. Temporal setae 2–5, 3; including 0–3, 1 inner vertical and 1–2, 2 outer verticals. Clypeus with 4–9, 6 setae. Tentorium, stipes and cibarial pump as in Figure 136 . Tentorium 55–86, 74 µm long; 7–14, 10 µm wide. Stipes 48–82, 67 µm long, 30 (1) µm wide. Palpomere ( Fig. 137 ) lengths (in µm): 8–15, 11; 12– 26, 18; 20–30, 25; 20–30, 25; 31–38, 36. Third palpomere with 2–4, 3 lanceolate sensilla clavata; longest 7– 11, 9 µm long.

Thorax ( Fig. 138 ). Median antepronotal lobes reduced; antepronotum with 0–3, 2 lateral setae. Dorsocentrals 3–6, 5; acrostichals 2; prealars 1–3, 2; supraalar absent. Scutellum with 2–4, 2 setae.

Wing ( Fig. 139 ). Anal lobe absent. Cu 1 curved. R 4+5 ending opposite apex of Cu 1. VR 1.69–1.79, 1.70. Costa not extended. Brachiolum with 1 seta, other veins bare.

Legs. Spur of fore tibia 17–25, 22 µm long; spurs of mid tibia 9–19, 12 (6) µm and 8–11, 9 µm long; of hind tibia 20–34, 25 µm and 9–15, 11 µm long. Width at apex of fore tibia 14–16, 15 µm; of mid tibia 12–15, 13 µm; of hind tibia 14–17, 16 (5) µm. Comb with 7–11, 10 setae; longest 18–27, 21 µm long, shortest 10–17, 14 µm long. Length and proportions of legs as in Table 17.

Hypopygium ( Figs 140–141 ). Anal point 12–26, 18 µm long, 7–14, 10 µm wide at base, with 4–11, 7 setae. Tergite IX with no additional setae. Laterosternite IX with 2–3, 2 setae. Phallapodeme 34–57, 47 µm long. Sternapodeme evenly rounded, with no trace of oral projections, arched part about 31–52, 43 µm long. Virga 33–47, 39 µm long; with lateral lamellae. Gonocoxite 79–104, 92 µm long. Superior volsella low, reaching to abouth 0.6 of gonocoxite length, fringed with strong, orally curved microtrichia. Gonostylus 34– 50, 40 µm long, with bluntly triangular apical crista dorsalis; megaseta 2–6, 4 µm long. HR 1.94–2.87, 2.24. HV 2.16–3.62, 3.01.

Remarks. This species and P. tropis sp. n. both have a long virga with lateral lamella otherwise only found in an undescribed Afrotropical Pseudosmittia . They thus must be regarded as only tentatively placed in the genus. P. palpina sp. n. apparently does not have virga with lateral lamella. However, its gonostylus looks exactly like the undescribed Afrotropical species and similar to that of P. lamellata .

Distribution and biology. The species apparently is widespread in Brazil as it has been taken in several nature reserves with Mata Atlântica forest along the Brazilian coast and also in a reserve in the middle of the Amazon forest in Amazonas State.

Figures

FIGURES 136–141. Pseudosmittia lamellata sp. n., male. 136—tentorium, stipes, and cibarial pump; 137—palp; 138— thorax; 139—wing; 140—hypopygium, dorsal aspect; 141—hypopygium with anal point and tergite IX removed, dorsal aspect to the left, ventral aspect to the right.