Parapsectrocladius escondido Cranston et Añón Suárez

Donato, Mariano, Mauad, Melina & Fuentes, María Cecilia, 2015, A new species of Parapsectrocladius Cranston (Diptera: Chironomidae: Orthocladiinae) from Patagonia, Argentina, Zootaxa 3911 (4), pp. 547-559 : 553-554

Parapsectrocladius escondido Cranston et Añón Suárez

Parapsectrocladius escondido Cranston et Añón Suárez in Cranston 2001: 440; Donato et al. 2008 (checklist), Ashe & O'Oconnor 2012 (catalog).

Parapsectrocladius escondido Cranston et Añón Suárez in Cranston 2000: 115. Nomen nudum.

Material examined. ARGENTINA: Holotype male with larval and pupal exuviae, Río Negro, P. N. Nahuel Huapi, Bariloche, Lago Escondido , 5-i-1998, Añón Suárez col. ( MLP #2678); 4 males, Río Negro, P. N. Nahuel Huapi, laguna Los Cántaros, 41°00'20.5''S – 71°49'19.5''W, 874 m a.s.l., 19-xii-2007 / 7-i-2008, Malaise trap, Garré-Montes de Oca cols. ( MLP); 4 females, Río Negro, P. N. Nahuel Huapi, mallín La Heladera, 41°00'06.4''S – 71°49'40.3''W, 859 m a.s.l., 15-xii-2006, sweep net, Garré-Montes de Oca cols. ( MLP).

Male (n = 5). Total length 3.60–4.16 (3.60) mm. Wing length 1.80–2.50 (1.80) mm. Total length/wing length 1.64–2.00 (2.00). Wing length/length of profemur 2.51–2.73 (2.51).

Head. AR 1.33–1.66 (1.33), ultimate flagellomere 466–631 (466) long. Temporal setae 7–8 (7), divided in 2–3 (3) inner verticals and 4–5 (4) outer verticals. Clypeus with 7–13 (7). Tentorium 174–212 (174) long and 32–50 (32) wide. Palpomere lengths (1–5): 48–64 (48); 42–68 (42); 122–164 (122); 126–188 (126); 175–236 (175).

Thorax. Antepronotum with 8–14 (14) lateral setae. Acrostichals 7–10 (7) [2]. Dorsocentrals 10–14 (10); prealars 3–4 (3); supraalar 1 (1). Scutellars 7–11 (7).

Wing. VR 1.12–1.20 (1.12). C extension 0–20 (0) long. Brachiolum with 2–3 (2) seta. R with 10–16 (12); remaining veins bare. Squama with 16–23 (16) setae.

Legs. Spur of front tibia 60–70 (60) long; spurs of mid tibia 22–34 (22) and 24–40 (24); of hind tibia: 24–60 (24) and 62–80 (62) long. Width at apex of front tibia 44–56 (44); of mid tibia 44–56 (46); of hind tibia 52–66 (52). Sensilla chaetica of tarsomere 1 of midleg 3–4 (3). Comb with 7–9 [4] setae. Lengths and proportions of legs in Table 3 .

Hypopygium. Tergum IX with 6–10 (8) setae. Anal point 58–84 [4] long, width at base 36–80 [4], and with 6–9 [4] setae.Phallapodeme 94–146 (94) long; transverse sternapodeme 64–104 (64) long. Gonocoxite 230–296 (230) long; length from base of gonocoxite to apex of inferior volsella/length of gonocoxite 0.65–0.69 (0.65). Gonostylus 95–116 (95) long; megaseta 14–16 [3] long. HR 2.40–2.74 (2.42); HV 3.53–3.80 (3.79).

Female (n =4). Total length 2.64–3.24 mm. Wing length 2.50–2.64 mm. Total length/wing length 1.00–1.30. Wing length/length of profemur 2.88–3.13.

Head. AR 0.39–0.54. Flagellomeres length: 84–90; 44–52; 46–54; 46–56; 92–124. Temporal setae 4–7: including 1–3 inner verticals and 3–4 outer verticals. Clypeus with 11–19 setae. Tentorium 180–200 long, 38–46 wide. Palpomeres length: 44–60; 60–70; 108–139; 140–154; 192–232 (3).

Thorax chaetotaxy. Lateral antepronotals 7–10, Dorsocentrals 11–17, Prealars 3, Supralar 1 (2), Scutelars 10–12.

Wing. VR 1.15–1.23. C extension 0–42 long. Brachiolum with 2 setae. R with 17–20, R1 7–8, R4+5 5–8. Squama with 16–24 setae.

Legs. Spur of fore tibia 30–40 long; spur of middle tibia 26–34 and 34–48 long; spurs of hind tibia 30–34 and 70–78 long. Width of apex of fore tibia 52–54; of middle tibia 54–60; of hind tibia 60–64. Sensilla chaetica on tarsomere 1 of middle leg 6–13, of hind leg 2–6. Tibial comb with 7–8 setae. Legs measurements as in Table 4 .

Abdomen. Number of setae on sternite VIII 4–9, Gonocoxite IX with 5–6 long setae and 2–7 small setae. Cercus 122–160 long. Seminal capsules 150–186 long. Notum 230–244 long.

Remarks. The new material was found in other standing water environments such as lagoon and mallín. This last environment, is a name from the Patagonian Mapuche native people that refers to a kind of wetland that can be a swampy area or a low area where water accumulates, is characteristic in Patagonia.

Tables

TABLE 3. Lengths (in Μm) and proportions of legs of Parapsectrocladius escondido Cranston & Añón Suárez (male, n = 5). Measurements of the holotype in square brackets. For abbreviation explanations see Table 1.

fe	ti	ta1	ta2	ta3
P1 718–963 [718]	892–1191 [892]	734–1018 [734]	387–544 [387]	229–300 [229]
P2 781–1026 [781]	828–1089 [828]	458–647 [458]	237–355 [237]	134–174 [134]
P3 828–1089 [828]	1018–1357 [1018]	671–923 [671]	363–497 [363]	174–229 [174]
ta4	ta5	LR	BV	SV
P1 103–142 [103]	110–142 [110]	0.82–0.85 [0.82]	2.78–2.98 [2.83]	2.12–2.19 [2.19]
P2 95–126 [95]	110–126 [110]	0.55–0.69 [0.55]	3.33–3.73 [3.59]	3.05–3.52 [3.52]
P3 95–134 [95]	110–142 [110]	0.66–0.70 [0.66]	3.37–3.71 [3.39]	2.56–2.75 [2.75]

TABLE 4. Lengths (in Μm) and proportions of legs of Parapsectrocladius escondido Cranston & Añón Suárez (female) (n = 4). For abbreviation explanations see Table 1.

fe	ti	ta1	ta2	ta3
P1 836–868	1057–1152	852–931	450–497	237–276
P2 915–963	947–1034	537–568	276–316	142–166
P3 907–986	1089–1278	813–860	418–450	181–197
ta4	ta5	LR	BV	SV
P1 126–134	134–142	0.75–0.84	2.82–2.99	2.08–2.32
P2 110–118	118–134	0.53–0.57	3.42–3.71	3.38–3.61
P3 118–126	134	0.64–0.79	3.3–3.46	2.32–2.75