Cylloepus friburguensis, Sampaio, Brunno Henrique Lanzellotti, Passos, Maria Inês Da Silva Dos & Ferreira-Jr, Nelson, 2011

Sampaio, Brunno Henrique Lanzellotti, Passos, Maria Inês Da Silva Dos & Ferreira-Jr, Nelson, 2011, Three new species of Cylloepus Erichson (Insecta: Coleoptera: Elmidae) from Southeastern Brazil, Zootaxa 2797, pp. 57-64 : 61-64

Cylloepus friburguensis sp. nov.

( Figs. 7–9 )

Diagnosis. Head with recumbent setae, coarse granules, and a pair of carinae posterior to antennae. Pronotum with a pair of complete sublateral carinae; a pair of incomplete median longitudinal carinae with a deep groove between them. Elytron with the third interval carinate from base to mid-length; sixth and eighth intervals carinate to apical 1/7. Male genitalia with median lobe little longer than parameres; wider at basal fourth, narrowing conspicuously at distal fourth, and with narrow and rounded apex; parameres relatively wide, narrowing at apical third, with inner face concave from base to apex.

Description. Holotype male: total length 4.60 mm; head width 0.82 mm, length 0.62 mm; pronotum width 1.40 mm, length 1.37 mm; elytra width 1.82 mm, length 3.00 mm. Body dark brown dorsally, reddish brown ventrally; antennae and mouthparts reddish brown; legs dark brown.

Head surface with recumbent setae and granules slightly bigger than facet of eyes, separated by less than one diameter; short carina beginning behind each antenna, extending beyond the half of head length. Eyes laterally prominent. Filiform antenna with a lateral tuft of setae on antennomeres VII-X and an apical tuft on antennomere XI. Clypeus with small recumbent setae and granulose surface. Labrum with anterior margin feebly convex, with fine small setae and rounded lateral angles bearing long and fine setae.

Pronotum slightly wider than long on the greatest length (approximately at the posterior 2/5). Surface with granules bigger than facet of eyes, separated by less than one diameter. Anterior margin feebly rounded; lateral margin sinuate and slightly crenate; posterior margin arcuate with the median portion projected. A pair of complete sublateral carinae, wider and prominent at median 3/5; a pair of median longitudinal carinae, beginning in front of scutellum, parallel at middle of pronotum, and fading near anterior margin, forming a deep groove between them; the groove extends beyond the carinae, but less conspicuously.

Elytral surface with granules bigger than facet of eyes, separated by less than one diameter. Anterior margin sinuate; lateral margins subparallel and crenate, with the greatest width at posterior third; apices projected with the elytral suture slightly separated. First and second intervals elevated; third interval with a conspicuous carina from base to mid-length of elytron; sixth and eighth intervals carinate up to the apical 1/7 – outer carina slightly longer than the inner. Epipleura non-tomentose, with granules bigger than facet of eyes, separated by 1–2 diameters. Scutellum as long as wide, heart-shaped.

Hypomeron granulose. Prosternum with granules bigger than facet of eyes, separated by one diameter. Prosternal process wide between the legs, extending beyond posterior margin of forecoxae; lateral margin slightly elevated; apex of process with rounded lateral angles and median projection. Mesosternum with a wide and shallow groove for reception of prosternal process; posterior portion of mesosternum granulose like prosternum. Metasternum with granules similar to those of prosternum and a conspicuous median longitudinal impression, beginning at posterior margin and extending to anterior fifth.

Coxae, trochanters, femora, and tibiae with granules separated by 1–2 diameters. Tibiae with two apical spines; foretibia with two fringes of tomentum, one on the apical half of anterior face, and other subapical on posterior face; mid-tibia with two fringes of tomentum, one on the apical third of anterior face, other on the apical half of posterior face; hind tibia with fringe of tomentum on the apical half of posterior face. Protarsus with long and fine setae, meso- and metatarsus with short setae.

Abdomen with granules bigger than facet of eyes, separated by 1–2 diameters. Ventrite I with a pair of carinae, beginning on posterior margin of metacoxal cavities, extending to posterior margin of ventrite. Granules on median portion of the ventrite II finer than on the rest of the abdomen surface. Ventrite V with granules closer, separated by less than one diameter; small and wide lobes with rounded apex; posterior margin rounded.

Male genitalia with median lobe extending little beyond the parameres (about 1/10 of median lobe length), basolateral apophyses relatively long (2/5 of median lobe length); wider at the basal fourth. Median lobe narrowing before the apical fourth with a narrow and rounded apex, with sparse sensilla. Parameres relatively wide, narrowing at the apical third; with sparse sensilla; inner face concave from base to apex. Phallobase four times longer than wide; 2/3 the total length of genitalia.

Variation. Female externally similar to male. Measurements of body may vary in total length 4.20–4.85 mm; head width 0.82–0.85 mm and length 0.25–0.64 mm; pronotum width 1.44–1.60 mm and length 1.28–1.31 mm; and elytra width 1.76–1.92 and length 2.97–3.04 mm.

Comparative notes. Cylloepus friburguensis sp. nov. is similar to C. reitteri and C. dorvillei in that the median pronotal groove, between the median longitudinal carinae, extends from the posterior to the anterior margin of the pronotum ( Hinton 1945). Cylloepus friburguensis sp. nov. and C. dorvillei have the same number and shape of tomental fringes on the middle and hind tibiae, and the male genitalia are relatively similar ( Passos & Felix 2004). On the other hand, this new species doesn’t possess a prominent gibosity on the metasternal disc or a tooth on the anterior margin of the prosternum, both characteristics present on C. reitteri . Cylloepus friburguensis sp. nov. may be distinguished from C. dorvillei by three characteristics: the space between the median longitudinal pronotal carina, wider in the last species; the discal carina of the elytra, on the anterior half in the new species, and on the anterior third in C. dorvillei ; and the shape of parameres and median lobe. Cylloepus friburguensis sp. nov.

differs from C. typhon in the median pronotal groove, which is restricted to the median 2/ 5 in C. typhon . These two species may also be distinguished by the lack of a depression on the fifth ventrite in the new species and by the shape of median lobe and parameres.

Type material. Brazil, Rio de Janeiro, Nova Friburgo municipality. Holotype, male – Rio Bonito de Lumiar, Córrego das Paineiras, 22°23’27.2”S 42°20’03.6”W, 694m, 24.V.2008 Toste, T; Cruz, T.; Padua, A. Leg. [ DZRJ Coleoptera 5553]. Paratypes, 2 males – same data of holotype, third order tributary to Rio Bonito, 22°24’38.2”S 42°20’38.6”W; Oliveira, A.L.H. Leg. [ DZRJ Coleoptera 5554]; 1 female – Lumiar, Córrego Boa Vista, São José waterfall, 22°19’01.5”S 42°17’23.3”W, 910m, 14.XI.2008, Nessimian, J.L.; Jardim, G.A.; Gonçalves, I.C.; Alecrim, V.P.; Souza, M.R.; Sampaio, B.H.L. Leg. [ MNRJ]; 5 female – Macaé de Cima, second order tributary to Rio Macaé, 22°25’33.6”S 42°31’56.4”W, 1023m, 13.XI.2009, Santos, A.P.M.; Alecrim, V.P. Leg. [DZRJ-5555].

Etymology. This species is named in reference to the municipality of the type locality, Nova Friburgo.

The following key presents changes to some couplets in Hinton’s key ( Hinton 1945) to include the three new species. The couplets not included here follows Hinton (1945):

. Epipleura without tomentum or with a narrow strip near metasternum and abdomen................................ 14 4. Pronotum with sides of median longitudinal depression strongly carinate from near base to near apex. Male and female with hind trochanter with short spine......................................................................... 15 12’. Pronotum with sides of median longitudinal impression nearly as strongly elevated as sublateral carinae, and surface of these sides subgranulated. Elytra with third interval carinate on basal half............................................ 13 13. Surface of elytra with numerous low, round granules about as coarse as facet of eyes, at least between sutural and third interval and between the outer and inner carinae................................................................... 16 14. Pronotum with sublateral carinae complete; median impression complete, broad on basal two-thirds and narrow on apical third. Elytra with inner carina extending to apical third and third interval strongly elevated on basal fifth. Legs with a single apical fringe of long tomentum on each tibia). French Guiana, Brazil: Porto Velho, Manaus, Belém........ C. olenus Hinton 14’. Pronotum with median impression restricted to middle two-fifths. Middle tibiae with fringe of tomentum on anterior and posterior face. Rio de Janeiro.............................................................. C. nessimiani sp. nov.

15. Oval scutellum; legs with anterior and posterior face of front and anterior face of middle and hind femora without distinct coarse punctures but with flat, highly polished callosities each of which has a minute seta arising from its distal margin. Male and female with fifth ventite horizontal and not channelled. Santa Catarina..................... C. brasiliensis Grouvelle

15’. Scutellum longer than wide, with anterior margin feebly arcuate; legs with anterior and posterior face of front, middle, and hind femora with micro punctures, and highly polished callosities (granules) without a visible seta arising from its distal margin. Male and female with fifth ventrite slightly convex. Rio de Janeiro.................... C. quinquecarinatus sp. nov.

16. Elytra with granules between suture and third interval and between lateral carinae; abdomen with lateral discal carinae of first sternite strongly elevated, broad, and extending to caudal margin of first segment. Male and female without trace of ridges on disc of second abdominal sternite. Santa Catarina............................................. C. gigas Grouvelle

16’ Elytra with granules on elytral intervals and carinae; abdomen with lateral discal carinae of first sternite slightly elevated, broad, and extending to caudal margin of first segment. Rio de Janeiro........................ C. friburguensis sp. nov.

Figures

FIGURES 7 – 9. Cylloepus friburguensis sp. nov., male. 7. Dorsal view; 8. Ventral view; 9. Male genitalia.