Canthysellus yawari, Guimarães & Ferreira-Jr, 2017

Guimarães, Bruno A. C. & Ferreira-Jr, Nelson, 2017, Four new species and new records of Canthysellus from Brazil (Coleoptera: Noteridae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 57 (2), pp. 521-534 : 530-533

Canthysellus yawari sp. nov.

( Figs 4 , 8a–e )

Type locality. Brazil, Amazonas State, Barcelos Municipality, Aracá Sierra, 00°51′57.82″N 63°28′01.99″W.

Type material. HOLOTYPE: J, ‘Brazil, Amazonas State, Barcelos Municipality, Aracá Sierra, Point Bo2, puddles with foliage, 00°51’57,82”N 63°28’01,99”W, 23.VII.2009, Ferreira-Jr. N. leg.’ ( INPA) . PARATYPES: BRAZIL: AMAZONAS: ‘ Brazil , Amazonas State, Barcelos Municipality, Mr. Miranda’s Site, Ukuki Community, puddle in the wood, trail to piaçaval, 00°35’17,84”N 63°36’51,88”W, 25.VIII.2009, Santos A.P.M. leg.’ (2 ♀♀ / INPA) ; ‘ Brazil , Amazonas State, Barcelos Municipality, Mr. Miranda’s Site, Ukuki Community, puddle on the trail, 00°35’17,84”N 63°36’51,88”W, 24.VIII.2009, Santos A.P.M. & Nessimian J.L. leg.’ (1 J / INPA) ; ‘ Brazil , Amazonas State , Barcelos Municipality, Aracá Sierra, Point B 02, 00°51’57,82”N 63°28’01,99”W, puddles with foliage, 23.VIII.2009, Ferreira-Jr. N. leg.’ (2 JJ 5 ♀♀ / DZRJ 6064 ) .

Diagnosis. Canthysellus yawari sp. nov. can be distinguished from other species in the genus by the following characteristics: small size, 2.45–2.65 mm; pronotum and elytra evenly covered with scattered punctures ( Fig. 4 ); prosternal process glabrous; median lobe of aedeagus, in lateral aspect, long and slender with a small dorsal projection just before the apex ( Figs 8a,c ). Description of holotype. Body outline, in dorsal view oval ( Fig. 4 ), as in C. kukrutkato sp. nov.

Color ( Fig. 4 ). Head and pronotum light-yellowish brown. Elytra dark brown, each elytron with four pale yellowish-brown maculae: one laterally, a second on disc, both just anterior to midlength of elytron, and a third near suture, these three markings appearing as an arched and interrupted transverse band; finally, a fourth short transverse macula on distal third. Ventral surface light yellowish-brown.

Head. Surface smooth and shiny. Antennae and palpi similar to those in C. kukrutkato sp. nov.

Thorax. Pronotum shiny, evenly covered with scattered punctures and with transversal row of punctures bearing long and slender setae in anterior margin. Prosternum with dense, transverse tuft of five stiff setae at middle of discal surface; line of setae continuous medially, not extending beyond the lateral margins of prosternal process. Prosternal process glabrous on disc, with lateral submargins and apex sparsely covered by short and stout setae, setae distinctly spaced and evenly distributed ( Fig. 10 ). Noterid platform completely covered by short and stout setae, distinctly spaced and evenly distributed. Elytron shiny, evenly covered with scattered punctures and with three longitudinal rows of punctures bearing long and slender setae ( Fig. 4 ). Metatibia with series of ten evenly spaced spiniform setae at posteroventral margin. Metatarsomere I with similar row of five setae on posteroventral margin.

Abdomen. Ventral surface as in C. kukrutkato sp. nov.

Aedeagus. Median lobe in lateral aspect long and slender, with ventral margin curved; small dorsal projection just before the apex and apex attenuate ( Figs 8a,c ); left side with long carina arising basally and ceasing apically, constituting the major part of left side ( Figs 8a–c ); in dorsal aspect, straight with apex slightly curved ( Fig. 8b ). Left lateral lobe, in lateral aspect, elongate and very slender with a dense tuft of setae at apex; setae distinctly extending beyond the dorsal margin ( Fig. 8d ). Right lateral lobe, in lateral aspect, slender and rounded ventrally ( Fig. 8e ).

Variation. Almost no variation was observed in the prominence of the maculae. Some specimens had a darker coloration than that of the type specimens. The number of stiff setae on the prosternal disc ranges from three to five in total. The setation on the lateral submargins of prosternal process is greatly reduced on many specimens. The number of setae on metatibia and metatarsomere I ranges from eight to twelve and three to four, respectively.

Measurements. Holotype: TL = 2.45 mm; MW = 1.30 mm; HW = 0.70 mm; EW = 0.45 mm; PntB = 0.05 mm; AntVII = 0.05 mm. Paratypes:TL = 2.45–2.65 mm (JJ = 2.45–2.60 mm; ♀♀ = 2.60–2.65 mm); MW = 1.30–1.50 mm; HW = 0.70–0.75 mm; EW = 0.45–0.50 mm; PntB = 0.05 mm; AntVII = 0.05 mm.

Etymology. The specific name refers to the Yanomâmi’s forest spirit ‘Yawari’, in honor of the indigenous people present in the area of origin of the holotype. It is a noun in the nominative singular standing in apposition.

Geographic distribution. So far Canthysellus yawari sp. nov. is known only from the Barcelos Municipality in the Brazilian state of Amazonas.

Key to species of Canthysellus (modified from BACA & TOLEDO 2015)

1 Pronotum and elytra smooth ( Figs 1, 2 ); prosternal process completely covered by short and stout setae ( Fig. 9 ). ................................................................................................... 2

– Pronotum and elytra evenly covered with scattered punctures ( Figs 3, 4 ); prosternal process glabrous on disc, with lateral sides and apex sparsely covered by short and stout setae, distinctly spaced and evenly distributed ( Fig. 10 ). ................................................ 6

2 Metatibia and metatarsomere I with inner margin densely setose ( Fig. 7 of BACA & TOLE- DO 2015); setae slender, hair-like; aedeagus as in Figs 10a–e of BACA & TOLEDO (2015). ..................................................................................... C. peruanus Baca & Toledo, 2015

– Metatibia and metatarsomere I with inner margin with single line of approximately 4–12 evenly spaced stiff setae ( Fig. 6 of BACA & TOLEDO 2015). ............................................ 3

3 Prosternum with dense, transverse tuft of stiff setae at middle of discal surface, discontinuous medially, extending beyond the lateral margins of prosternal process ( Figs 4a,b of BACA & TOLEDO 2015). .................................................................................................... 4

– Prosternum with dense, transverse tuft of stiff setae at middle of discal surface, continuous medially, not extending beyond the lateral margins of prosternal process ( Fig. 5 of BACA & TOLEDO 2015). .............................................................................................................. 5

4 Larger size, 3.35–3.50 mm; base of head usually strongly infuscate, nearly black ( Fig. 2 of BACA & TOLEDO 2015); aedeagus as in Figs 9a–e of BACA & TOLEDO 2015, left lateral lobe very broad with setae extending just to or only slightly beyond the lobe margin ( Fig. 9d of BACA & TOLEDO 2015); median lobe with apex elongate in lateral aspect ( Figs 9a,c of BACA & TOLEDO 2015). .......................................... C. sipaliwini Baca & Toledo, 2015

– Smaller size, 2.65–3.25 mm; base of head usually only weakly infuscate ( Fig. 1 of BACA & TOLEDO 2015); aedeagus as in Figs 8a–e of BACA & TOLEDO 2015, left lobe with setae extending far beyond lobe margin ( Fig. 8d of BACA & TOLEDO 2015); median lobe with apex pointed, but not elongate in lateral aspect ( Figs 8a,c of BACA & TOLEDO 2015). ....... ................................................................................................. C. buqueti (Laporte, 1835)

5 Large size, 3.35–3.40 mm; median lobe, in lateral aspect, elongate and thin with dorsobasal margin sharply narrowing before midlength of median lobe ( Figs 6a,c ). ..................... ............................................................................................................ C. putkarot sp. nov.

– Medium to large size, 2.90–3.15 mm; median lobe, in lateral aspect, short and stout with dorsobasal margin oblique and distinctly projected, sharply narrowing at midlength of median lobe ( Figs 5a,c ). ................................................................ C. kukrutkato sp. nov.

6 Larger, 2.95–3.40 mm; prosternum with dense, transverse tuft of stiff setae at middle of discal surface, discontinuous medially, extending beyond the lateral margins of prosternal process ( Figs 4a–b of BACA & TOLEDO 2015); median lobe, in lateral aspect, long and robust with a large dorsal projection just before apex; apex rounded and globose ( Figs 7a,c ). .................................................................................................... C. omawe sp. nov.

– Smaller, 2.45–2.60 mm; prosternum with dense, transverse tuft of stiff setae at middle of discal surface, continuous medially, not extending beyond the lateral margins of prosternal process ( Fig. 5 of BACA & TOLEDO 2015); median lobe, in lateral aspect, long and slender with a small dorsal projection just before apex ( Figs 8a,c ). .................... C. yawari sp. nov.

Figures

Figs 1–4. Habitus of Canthysellus species in lateral and dorsal view: 1 – C. kukrutkato sp. nov.; 2 – C. putkarot sp. nov.; 3 – C. omawe sp. nov.; 4 – C. yawari sp. nov. Scale bar = 1 mm.

Figs 5–8.Aedeagi of Canthysellus: a – median lobe, left lateral aspect, b – same, dorsal aspect, c – same, right lateral aspect, d – left lateral lobe (paramere), e – right lateral lobe. 5 – C. kukrutkato sp. nov.; 6 – C. putkarot sp. nov.; 7 – C. omawe sp. nov.; 8 – C. yawari sp. nov. Scale bar = 0.2 mm.

Figs 9–10. Prosternum, meso- and metaventrum and noterid platform (metacoxae) of Canthysellus, depicting distribution of setae. 9 – C. buqueti (Laporte, 1835); 10 – C. omawe sp. nov. Scale bar = 0.5 mm.