Three new genera of large marsh beetles (Coleoptera: Scirtidae) from Valdivian temperate rain forests of southern South America Author Ruta, Rafał text Zootaxa 2021 2021-10-08 5048 4 451 485 journal article 4049 10.11646/zootaxa.5048.4.1 243a784a-5175-4420-b3ca-9a05b8ca81fe 1175-5326 5556650 C1AE78B5-8BC2-4BEF-90E9-14CED750130F Mucronotus valdivianus sp. nov. (Chiloe) ( Figs 10F–G , 13E , 19–20 ) Type material. Holotype , male ( DBET ): “ CHILE W, Reg. X \ Chiloe Isl. SE, 20 km \ NNW of Quellon \ 216 m , 42.58 , 73.45 \ 31.1.2005 , Snižek lgt.” . Paratypes (97 exx. in total). 5 exx. ( CMNC ): “ CHILE : Chiloe Isl. \ 8km S Ancud \ 1.II.85, S&J Peck \ forest remnant litter”. 4 exx. ( CMNC ): “ CHILE : Osorno: Puyehue \ Nat. Pk; Aquas Calientes \ 18.XII.84-8.II.85 \ S&J Peck, 600m , malaise \ Nothofagus forest”. 1 ex. ( CMNC ): “ CHILE : Osorno: Puyehue \ N. P.; Aguas Calientes \ 20.XII.84, S&J Peck \ 500 m , sifted forest \ stick litter, Pionero Tr.”. 1 ex. ( CMNC ): “ CHILE : Osorno: Puyehue \ N. P.; Aguas Calientes \ 20.XII.84-8.II.85 \ S&J Peck, 500 m , FIT \ Derumbes Forest Trail”. 1 ex. ( CMNC ): “ CHILE : Osorno: Puyehue \ Nat. Park, Antillanca Rd. \ 18-20.XII.84, S&J Peck \ 500-1000 m , carnetting”. 1 ex. ( CMNC ): “ CHILE : Lago Chapo \ 34 km E Pto. Montt \ 24.XII.84-2.II.85 \ S&J Peck, 300m , FIT \ 2nd growth Nothofagus ”. 2 exx. ( CMNH ): „Prov. AYSEN \ 10Km. N. Pto. Ibanez \ 14.17 Enero 1961 \ Coll: L. E. Pena”; „ CHILE ”. 31 exx. ( DBET ): same data as holotype . 2 exx. ( DBET ): “ CHILE W, Reg. X \ Fresia, WWN of Parga \ 480 m 27.I.2005 \ M. Snižek lgt.”. 3 exx. ( DBET ): “ CHILE W, Reg. X \ Purrangue 600 m \ W of Hueyusca \ 26 I 2005 , \ M. Snižek”. 5 exx. ( DBET ): “ CHILE W Reg. X \ W of Los Muermos \ 1-2 km E Oc. Pacifico \ 160 m 41.20, 73.49 \ 28 I 05, leg. M. Snižek”. 1 ex. ( DBET ): “ CHILE W, Reg. X \ NC Chiloe, 20 km \ NNE Castro, Inia env. \ 180 m 42.15.72 73.40.50 \ 31.I.2005 Snižek lgt.”. 1 ex. ( DBET ): „ CHILE —reg. X, 50kmSW \ Los Muermos, 30.1.2005 \ 41°30.0’S, 73°35.7’ W \ leg. M. Halada, 150m ”. 4 exx. ( DBET ): “ CHILE W, Reg. X \ NW Chiloe, SW of \ Aneud 250 m \ 4.11.2005 Snižek lgt.”. 1 ex. ( DBET ): “ CHILE — Isla de Chiloe \ W of Castro, 9.2.2005 \ 42°20’S, 73°48’ W \ leg. M. Halada 200m ”. 1 male ( EMEC ): “62- CHILE X REGION \ Chaihuin, Hueicolla Way Fog- \ ging 12:42 PM, 12.I.2007 107m \ 18°C, S39°59.926 / W73°38.976 \ Nothofagus dombeyi 20 m \ Arias et al UC Berkeley”; “ Scirtidae \ Genero sp. 1 \ det. G. Arriagada 2007”. 1 male ( EMEC ): “42° 36’50.3’’S/74°06’14.7’’ \ CHILE , X Region, Chiloe Nat. Pk. \ under logs/rocks, 20:i:2002 \ Colls. K. Will, S. Lew”; “ Cyphon \ sp. \ det.: J. E. Barriga”; “U. C. Berkeley \ EMEC 107098”. 2 males ( EMEC ): “66.- Chile X Region, Chaihuin \ Res. Costera Valdiviana_ 362m \ Las Garzas Way Fogging 1:27 AM \ 12/I/2007 17°C Nothofagus nitida \ S39°59.700 / W73°34.663 \ Arias et al Berkeley”; “ Elodes \ rouselii \ Solier 1849 \ det. J. E. Barriga-Tuñon 2008”; “UC Berkeley \ EMEC 118524”. 1 male ( EMEC ): “70.- Chile X Region, Chaihuin \ Res. Costera Valdiviana \ Fogging 11:44 AM 14/I/2007 . \ 191m 21°C Nothofagus nitida \ 35m S39°59.986 / W73°38.971 \ Arias et al Berkeley”; “ Elodes \ rouselii \ Solier 1849 \ det. J. E. Barriga-Tuñon 2008”; “UC Berkeley \ EMEC 118160”. 3 exx. ( EMEC ): “60- CHILE X REGION \ Oncol Park, Quitaqui Way Fog- \ ging 15:32 PM, 10.I. 2007 , 519m \ 13°C, S39°42.071 / W73°18.547 \ Saxegothaea conspicua 45m \ Arias et al UC Berkeley”; “ Scirtidae \ Genero sp. 1 \ det. G. Arriagada 2007”. 1 ex. ( EMEC ): “61- CHILE X REGION \ Chaihiun Hueicolla Way, Fogging \ 12:23 PM, 12.I. 2007 , 107 m, 18° CS \ 39°51.926/ W73°38.976 \ Nothofagus dombeyi 20 m \ Arias et al UC Berkeley”; “ Scirtidae \ Genero sp. 1 \ det. G. Arriagada 2007”. 3 exx. ( EMEC ): “67- CHILE X REGION \ Chaihuin Reserva Costera Valdivi- \ ana, Las Garzas Way, Fogging \ 15:27 PM, 13.I. 2007 , 357m 17°C, \ S39°59.669 / W73°34.721 , Nothofagus \ dombeyi 35m , Arias et al UC Berkeley”; “ Scirtidae \ Genero sp. 1 \ det. G. Arriagada 2007”. 1 ex. ( EUM ): “ CHILI , Prov. Valdivia, \ Pargue Oncol, Sendero \ Calfuco 17.I.2007 \ T. Cekalovic leg TC-831”. 1 ex. ( EUM ): “ CHILI , Prov. Valdivia, \ Pargue Oncol, 700 m , \ 14.I.2001 T. \ Cekalovic leg. TC-647”. 1 ex. ( EUM ): “Prov. Llanquinve, \ Chinquihve Alto, \ 12.I.1990 \ T. Cekalovic leg.”. 1 ex. ( FMNH ): “ LLANQUIHUE \ Hornohuinco \ Lag. Chapo”, “ Dec. 1968 \ L. E. Peña”, “FMNH, 1986 \ L. Peña Coll. \ Acc. #17.422”. 1 ex. ( FMNH ): “Pto Cisnes \ Aysen II-1961 \ Coll. L. E. Pena”, “FMNH, 1986 \ L. Peña Coll. \ Acc. #17.422”. 1 ex. ( MHNG ): “ CHILE : X Reg. Prov. Osorno \ PN Puyehue, Aguas \ Calientes, 400-500 m \ 31.XII.1990 - 1.I.1991 \ Agosti & Burckhardt #25b”. 2 exx. ( MHNG ): “ CHILE : X Reg. Prov. Chiloé \ Cucao, 30 km SW Castro \ PN Chiloé, 30 m , temp. rain \ forest, 4-6.I.1991 \ Agosti & Burckhardt #29a”. 1 ex. ( NHM ): “ CHILE : \ Laguna San Rafael \ Feb-March 1999”; “Base Camp \ 46°44’44’’ S \ 73°56’34’’ W”; “Moss from \ tree”; “BM-1999-107 \ P. M. Hammond \ K. A. Jackson”. 1 ex. ( NHM ): “ CHILE : \ Laguna San Rafael \ Feb-March 1999”; “Base Camp \ 46°44’44’’ S \ 73°56’34’’ W”; “LEAF LITTER”; “BM- 1999-107 \ P. M. Hammond \ K. A. Jackson”. 2 exx. ( NHM ): “ CHILE : \ Laguna San Rafael \ Feb-March 1999”; “Base Camp \ 46°44’44’’ S \ 73°56’34’’ W”; “Forest Litter”; “BM-1999-107 \ P. M. Hammond \ K. A. Jackson”. 1 ex. ( NHM ): “19 CHILE X Reg. \ PN Puyehue \ Anticura \ I.Ribera leg. 31.I.1999 ”; “BM 1999-195 \ 19.i.-9.ii.1999 \ I. Ribera”. 1 ex. ( NHM ): “49685”; “ex Mus \ Murray”; “ Chili ”; “Fry Coll. / 1905-100.”. 1 ex. ( NHM ): “ CHILE : \ Laguna San Rafael \ Feb-March 1999”; “Malaise \ Trap 2”; “BM-1999-107 \ P. M. Hammond \ K. A. Jackson”. 2 exx. ( NHM ): “ CHILE : \ Laguna San Rafael \ Feb-March 1999”; “Base Camp \ 46°44’44’’ S \ 73°56’34’’ W”; “Malaise trap \ Week 1 Beach”; “BM-1999-107 \ P. M. Hammond \ K. A. Jackson” [ 1 specimen with additional label “? gen. n. 1 \ sp. 1 \ P. M. Hammond det.”. 1 ex. ( NHM ): “ CHILE : \ Laguna San Rafael \ Feb-March 1999”; “Base Camp \ 46°44’44’’ S \ 73°56’34’’ W”; “Moss from \ ground”; “BM-1999-107 \ P. M. Hammond \ K. A. Jackson”. 1 ex. ( NHM ): “ CHILE : \ Laguna San Rafael \ Feb-March 1999”; “BM-1999-107 \ P. M. Hammond \ K. A. Jackson”. 1 ex. ( NHMF ): „ CHILE , prov. Valdivia, \ Chaihuín, Camino a \ Huaicolla, 12 ene 2007 , \ 107mt, 39°59.926 S 73° \ 38.976W, fogging s/ \ Nothofagus dombeyi , \ leg. J. E. Barriga-Tuñón”. 1 ex. ( SEMC ): “ CHILE : Osorno \ 14.5 km W Puaucho \ 40°37’S, 73°45’W, 175m \ 11-28 Nov 1994 . R. Les- \ chen & C. Carlton #170 \ ex flight intercept trap”. Diagnosis. Posterolateral angles of pronotum well marked; elytra covered with dense but small punctures; processes of trigonium shorter than pala, curved, distinctly widened at apices, with ca. 20 denticles on its outer margin and 6 denticles on inner margin; anterior portion of bursal sclerite subtrapezoidal. FIGURE 19. Mucronotus valdivianus sp. nov. , male. A) penis; B) tegmen; C) sternite VIII, D) sternite IX; E) tergite VIII; F) tergite IX. Scale bar = 0.5 mm. Description. Male. Body moderately large (TL 6.2–8.3 mm ), elongate (TL/EW 1.7–1.9), widest in the middle of elytra, moderately convex. Colouration chestnut brown. Head ca. 1.6× wider than interocular space, convex, densely covered with strong granulate punctation, punctures separated by ca. 0.2–0.3× diameter of a puncture; eyes moderately large, protuberant. Pronotum transverse (PW/PL 1.9–2.4), punctation on disc not granulate, sparse, punctures separated by ca. 2.0× diameter of a puncture, punctation on sides dense, granulate, similar to that on head, lateral carinae of pronotum almost straight, posterolateral angles well marked, anterolateral angles long, subtriangular. Elytra long, 4.0–5.0× longer than pronotum, 1.4–1.5× wider than pronotum; punctation irregular, dense, punctures small, separated by ca. the diameter of a puncture. Aedeagus symmetrical, penis ( Fig. 19A ) large (L 1.40 mm , W 0.57 mm), dorsoventrally flattened; trigonium bifid, each process of trigonium curved widened in apical portion, outer margin with ca. 20 denticles and ca. 6 denticles on inner margin of widened apical portion; parameroids subtriangular, with relatively wide apical portion, apices slightly longer than processes of trigonium. Tegmen ( Fig. 19B ) large (L 1.40 mm , W 0.97 mm), subrectangular, with small, subtriangular lateral processes; ventral processes wide, each with two subtriangular lobes; parameres digitiform, without setation. Sternite VIII ( Fig. 19C ) (L 0.60 mm , W 0.83 mm) widely v-shaped, with sparse setation at apex; sternite IX ( Fig. 19D ) (L 0.80 mm , W 0.90 mm) oval, consisting of two subtriangular hemisternites, apical portion covered with setae. Tergite VIII ( Fig. 19E ) large (L 1.1 mm , W 1.07 mm), apodemes shorter than apical plate, apical plate subtrapezoidal, apical margin rounded, with a row of sparse setae. Tergite IX ( Fig. 19F ) (L 0.80 mm , W 0.73 mm) with short apodemes, apical portion membranous, setation indistinct. Female. Body slightly smaller (TL TL 5.40–7.40 mm ), setation of dorsum dense, recumbent; head with coarse punctures separated by ca. 0.2–0.3× diameter of a puncture; disc of pronotum more convex than in males; pronotal disc densely covered with small, not granulate punctures, lateral sides of pronotum with coarse, granulate punctures separated by ca. 0.2× diameter of a puncture; punctures on elytra separated by ca. 1.0–1.5× diameter of a puncture; ovipositor long (L 4.2 mm , Fig. 20A ), without branchlets, coxites subtriangular, elongated, apices of coxites with numerous short setae, styli apical, with two single patches of sensillae, bursal sclerite (L 2.1 mm , W 0.8 mm) elongate, with subtrapezoidal sclerotization in anterior portion ( Fig. 20B ). Measurements and ratios. Males (n = 10) TL 6.20–8.30 mm ( 7.2 mm ), PL 1.20–1.55 mm ( 1.34 mm ), PW 2.50–3.00 mm ( 2.8 mm ), EL 5.00– 6.90 mm ( 5.9 mm ), EW 3.70–4.50 mm (4.0 mm), TL/EW 1.7–1.9 (1.8), PW/PL 1.9–2.4 (2.2), EL/EW 1.3–1.6 (1.5), EL/PL 4.0–5.0 (4.6), EW/PW 1.4–1.5 (1.4). Females (n = 10) TL 5.40–7.40 mm ( 6.6 mm ), PL 1.00– 1.50 mm ( 1.3 mm ), PW 2.10–3.10 mm ( 2.7 mm ), EL 4.30–5.90 mm ( 5.4 mm ), EW 2.90–4.20 mm ( 3.7 mm ), TL/EW 1.7–1.9 (1.7), PW/PL 2.0–2.3 (2.1), EL/EW 1.3–1.5 (1.4), EL/PL 3.7–4.6 (3.9), EW/PW 1.3–1.4 (1.4). Distribution. Species known from numerous localities scattered in the Chilean regions Los Ríos , Los Lagos , and Aysén ( Fig. 24C ). Biology. Most specimens were collected in Valdivian temperate forests which included Nothofagus dombeyi and N. nitida . Etymology. After Valdivia, a region where the species occurs.