New species of Bryophaenocladius Thienemann, 1934 (Diptera: Chironomidae) from Argentina Author Donato, Mariano Instituto de Limnología ‘ Dr. Raúl A. Ringuelet’ (ILPLA) CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas) CCT-La Plata. Boulevard 120, Casco Urbano, B 1900 La Plata, Buenos Aires, Argentina. & Facultad de Ciencias Naturales y Museo (FCNyM - UNLP). Avenida 122 y 60, Casco Urbano, B 1900 La Plata, Buenos Aires, Argentina. Author Mauad, Melina Programa de Estudios Aplicados a la Conservación del Parque Nacional Nahuel Huapi (CENAC-APN), Fagnano 244, San Carlos de Bariloche, Río Negro, Argentina. Author Siri, Augusto Instituto de Limnología ‘ Dr. Raúl A. Ringuelet’ (ILPLA) CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas) CCT-La Plata. Boulevard 120, Casco Urbano, B 1900 La Plata, Buenos Aires, Argentina. & Facultad de Ciencias Naturales y Museo (FCNyM - UNLP). Avenida 122 y 60, Casco Urbano, B 1900 La Plata, Buenos Aires, Argentina. text Zootaxa 2024 2024-05-10 5448 2 283 291 http://dx.doi.org/10.11646/zootaxa.5360.3.8 journal article 10.11646/zootaxa.5448.2.8 1175-5326 11231660 98DD6D1D-82C9-4E18-98D7-E49717CA840F Bryophaenocladius virgotruncatus sp. n. urn:lsid:zoobank.org:act: F75FE402-9A4A-4757-873B-48F4F556B09B Figures 3B , 4C–D . Type material. Holotype Male : Argentina , Río Negro , PN Nahuel Huapi, C ° Challhuaco , Mallín Los Patos , 41º 15’ 48.6’’S , 71º 17’ 50.3’’W , 20.xii.2006 , Malaise trap , leg. A. Garré- F. Montes de Oca ( MLP ). Etymology: referring to the truncated end of virga. Diagnosis: See identification key. Male ( n = 1) Total length 3.34 mm . Wing length 1.9 mm . Total length/wing length 1.76. Wing length/length of profemur 2.16. Coloration blackish brown. Head.Antennae lost. Temporal setae 11, divided in 5 inner verticals, 3 outer verticals and 3 postoculars. Clypeus with 17 setae. Tentorium 180 long, 34 wide. Stipes 180 long, 54 wide. Palp segment lengths: 44; 84; 222; 172; 212. Third palpomere without finger-like apical extension, without sensilla clavata. Thorax. Antepronotum with 5 lateral setae. Dorsocentrals 23; acrostichals starting some distance from antepronotum, 9; supralars 0; prealars 20. Scutellum with 35 setae in three rows. Wing ( Fig. 3B ). Microtrichia visible at 100x magnification. VR 1.6. C extension 62. Brachiolum with 6 seta; R with 29; R 1 with 20; R 4+5 with 29; M with 3. Squama with 23 setae. Anal lobe well developed. Legs. Spur of front tibia 64 long; spurs of middle tibia 34 and 36 long; of hind tibia: 36 and 80 long. Width at apex of front tibia 50; of middle tibia 50; of hind tibia 60. Comb with 10 setae. Pseudospurs absent. Lengths and proportions of legs in Table 2 . TABLE 2. Lengths (in μm) and proportions of legs of Bryophaenocladius virgotruncatus sp. n. (male) ( n = 1).Abbreviations as in Table 1.

fe	ti	ta1	ta2	ta3
P1	876	1018	631	371	252
P2	939	907	426	237	174
P3	868	1026	-	-	-
ta4	ta 5	LR	BV	SV
P1	174	110	0.62	2.78	3.00
P2	126	103	0.47	3.56	4.33
P3	-	-	-	-	-

Hypopygium ( Figs. 4C–D ).Anal point bluntly isosceles triangle-shaped, slender, pointed at the end, and hyaline, 52 long. Tergum IX with 22 setae, laterosternite IX with 8 setae. Phallapodeme 44 long; transverse sternapodeme 114 long. Virga with truncated end, 36 long. Gonocoxite 228 long, inferior volsella rounded; ending at 90 from apex of gonocoxite; ratio “inferior volsella ending from apex of gonocoxite/length of gonocoxite” 0.39. Gonostylus 112 long; crista dorsalis well developed; megaseta 10 long. HR 2.04; HV 2.98.