Mucronotus patagonicus, Ruta, 2021

Ruta, Rafał, 2021, Three new genera of large marsh beetles (Coleoptera: Scirtidae) from Valdivian temperate rain forests of southern South America, Zootaxa 5048 (4), pp. 451-485: 468-470

publication ID

https://doi.org/10.11646/zootaxa.5048.4.1

publication LSID

lsid:zoobank.org:pub:C1AE78B5-8BC2-4BEF-90E9-14CED750130F

DOI

http://doi.org/10.5281/zenodo.5569628

persistent identifier

http://treatment.plazi.org/id/03BD9556-1E21-7A68-FF38-FAD4F693F8FC

treatment provided by

Plazi

scientific name

Mucronotus patagonicus
status

sp. nov.

Mucronotus patagonicus   sp. nov.

( Figs 10C View FIGURE 10 , 13C View FIGURE 13 , 16 View FIGURE 16 )

Type material. Holotype, male ( EMEC): “59- CHILE X REGION \ Oncol Park , Quitaqui Way Fog- \ ging 12:03 PM, 10.I. 2007, 526m \ 19°C, S39°42.009 / W73°18.558 \ Sexegothaea conspicua   40m \ Arias et al UC Berkeley”; “ Scirtidae   \ Genero sp. 4 \ det. G. Arriagada 2007” GoogleMaps   . Paratypes (17 exx. in total, all males): 1 ex. ( DBET): “ CHILE W, Reg. X \ W of Pargua \ 40 m 29.I.2005 \ M. Snižek lgt.”. 1 ex. ( DBET): “ CHILE CW, reg. IX \ SE of NUEVA TOLTÉN \ BOROA CENTRAL \ 22.I.2004 \ LGT.M. SNIŽEK”. 1 ex. ( EMEC): same data as holotype. 1 ex. ( EMEC): “60- CHILE X REGION \ Oncol Park, Quitaqui Way   GoogleMaps 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”. 3 exx. ( EMEC): “54- CHILE X REGION \ Oncol Park, Fogging 14:36 PM \ 300cc/l, 08.I. 2007, 576m 19°C \ S39°41.973 / W73°18.917 \ Sexegothaea conspicua   40m \ Arias et al UC Berkeley”; “ Scirtidae   \ Genero sp. 1 \ det. G. Arriagada 2007”. 2 exx. ( EMEC): “56- CHILE X REGION \ Punta Curinanco, Fogging \ 12:44 PM, 09.I. 2007, 177m \ 17°C, S39°42.788 / W73°24.323 \ Aextoxicon punctatum   25m \ Arias et al UC Berkeley”; “ Scirtidae   \ Genero sp. 1 \ det. G. Arriagada 2007”. 2 exx. ( EMEC): “52- CHILE X REGION \ Oncol Park, Calfuco Way Fog- \ging 14:13 PM, 150 cc/l, 07.I.2007 \ 515m 14°C, S39°42.114 / W73° \ 19.244 Sexegothaea conspicua   \ 35m, Arias et al UC Berkeley”; “ Scirtidae   \ Genero sp. 1 \ det. G. Arriagada 2007”. 1 ex. ( EMEC): “ CHILE, X Region Los Rios, \ Oncol Park , 5- 19.01.2007 \ Malaise trap T1 \ Arias et Ruiz UC Berkeley”; “ Scirtidae   \ Genera \ sp. 1 \ det. J. E. Barriga-Tufion 2008”. 2 exx. ( EUM): „CHILI, Prov. Valdivia, \ Parque Oncol, 485 m, 9 I \ 2001 T. Cekalovic leg.”. 1 ex. ( EUM): “ CHILI, Prov. Valdivia, \ Parque Oncol , 485 m \ 6 I 2002 T. Cekalovic leg.”. 1 ex. ( EUM): “ CHILI, Region X, N of \ Valdivia , Parque Oncol 13. \ I. 2007 WD Shepard leg.”. 1 ex. ( 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 ”.

Diagnosis. Posterolateral angles of pronotum well marked; elytra covered with dense but small punctures; processes of trigonium shorter than pala, curved, with ca. 15 denticles on its outer margin, gradually narrowing till apices.

Description. Male. Body moderately large (TL 6.5–8.0 mm), elongate (TL/EW 1.7), widest in the middle of elytra, moderately convex. Colouration chestnut brown. Head ca. 1.5× wider than interocular space, convex, densely covered with strong, granulate punctation, punctures separated by 0.3–0.5× diameter of a puncture; eyes moderately large, protuberant. Pronotum transverse (PW/PL 2.0), covered with dense (separated by 0.3–0.5× diameter of a puncture) and strongly granulate punctures on sides and more sparse punctures on central portion, lateral carinae of pronotum rounded, posterolateral angles well marked, anterolateral angles subtriangular. Elytra long, ca. 4× longer than pronotum, 1.5× wider than pronotum; punctation irregular, sparse, separated by ca. the diameter of a puncture. Aedeagus symmetrical, penis ( Fig. 16B View FIGURE 16 ) large (L 1.70 mm, W 0.67 mm), dorsoventrally flattened; trigonium bifid, each process of trigonium curved, with ca. 15 denticles on margin; parameroids subtriangular, narrowed in apical portion, as long as processes of trigonium. Tegmen ( Fig. 16C – D View FIGURE 16 ) large (L 1.77 mm, W 1.03 mm), subrectangular, with small, subtriangular lateral processes each with two denticles at apex; ventral processes wide, each with two lobes (large subtriangular and small suboval one); parameres digitiform, without distinct setation. Sternite VIII ( Fig. 16E View FIGURE 16 ) (L 0.70 mm, W 1.0 mm) widely v-shaped, with sparse setation at apex; sternite IX ( Fig. 16F View FIGURE 16 ) (L 1.0 mm, W 0.80 mm) oval, consisting of two subtriangular hemisternites, apical portion covered with dense setae. Tergite VIII ( Fig. 16G View FIGURE 16 ) (L 1.17 mm, W 1.10 mm) with apodemes shorter than apical plate, apical plate subtrapezoidal, apical margin rounded, with sparse setae. Tergite IX ( Fig. 16H View FIGURE 16 ) (L 0.93 mm, W 0.73 mm) with short apodemes, apical portion membranous, setation indistinct.

Female. Unknown.

Measurements and ratios. Males (n = 10) TL 6.50–8.0 mm (7.46 mm), PL 1.1–1.9 mm (1.44 mm), PW 2.5–3.3 mm (2.86 mm), EL 5.5–6.6 mm (6.24 mm), EW 3.8–4.7 mm (4.83 mm), TL/EW 1.70–1.83 (1.71), PW/PL 1.74–2.27 (2.0), EL/EW 1.38–1.55 (1.42), EL/PL 3.42–5.0 (4.21), EW/PW 1.42–1.52 (1.47).

Distribution. A rare species, known from numerous collections from the Oncol Park (Los Ríos region) and two distant localities in regions Los Lagos and Aysén of Chile ( Fig. 24 View FIGURE 24 ).

Biology. Most specimens were collected in Valdivian temperate forests with predominating Aextoxicon   punctatum Ruiz & Pav. and Sexegothaea conspicua   .

Etymology. Referring to the area inhabited by the species—Patagonia.

EMEC

Essig Museum of Entomology

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Scirtidae

Genus

Mucronotus