Liogenys bilobata Frey, 1969

Cherman, Mariana Alejandra, Mise, Kleber Makoto, Moron †, Miguel Angel, Vaz-de-Mello, Fernando Z. & Almeida, Lucia Massutti de, 2017, A taxonomic revision of Liogenys occurring in Brazil with an interactive key and remarks on New World Diplotaxini (Coleoptera, Melolonthidae), ZooKeys 699, pp. 1-120 : 18-22

Liogenys bilobata Frey, 1969 Figs 59, 89

Liogenys bilobatus Frey, 1969: 45, 58 (orig. desc., key)

Liogenys bilobata : Evans 2003: 207 (check.); Evans and Smith 2005: 178 (check.); Evans and Smith 2009: 176 (check.).

Type material.

Liogenys bilobata male holotype (MZSP): [white, printed] "Buritis (Primeira./cachoeira Rio Uru-/cuia) MG - 2-4.XI./1964 Exp. Dep. Zool.", [white handwritten] "Type/ Liogenys / bilobatus M/[printed]det. G. Frey, 1967/8/n.sp.", [red printed] “Typus”. Genitalia mounted. Paratypes (1): Male paratype (MZSP) [white printed] "Buritis (Primeira./cachoeira Rio Uru-/cuia) MG - 2-4.XI./1964 Exp. Dep. Zool.", [white handwritten] "Type/ Liogenys / bilobatus M/[printed]det. G. Frey, 1967/8/n.sp.".

Non-type material.

BRAZIL. PB: Juazeirinho, 16/III/1956, Silva col., 1 ex. (MNRJ); MT: Cuiabá, Dist. Guia. Faz. Santhidi, 15°28'47"S 56°07'33"W, 3/XI/2010, 180 m, L. Silva col., 1 ex.; Chapada dos Guimaraes, 3/XII/2008, A. F. Silva col., 1 ex.; 15°19'49"S, 55°51'08"W, 14/XII/2012, 300 m, G. Daniel col., 1 ex. (CEMT); DF: Planaltina (Embrapa Cerrados), 15°36'16"S, 47°44'16"W, 3/XI/2006, C. Oliveira col., 2 ex. (CEMT); MG: Buritis (Primeira cachoeira Rio Uricuia), 2-4/XI/1964, Exp. Dep. Zool. col., 2 ex.; Três Marias, 21/X/1964, Exp. Dep. Zool. col., 1 ex.; Unaí (Faz. Bolívia), 22-24/X/1964, Exp. Dep. Zool. col., 1 ex. (MZSP); SP: without date and collector, 1 ex. (ZMHB).

Diagnosis.

Body reddish brown; elongate, wider in the posterior third; elytra brownish, pronotum darker; clypeal emargination deep, narrow and rounded; outer sides of anterior teeth concave, following the lateral margin of clypeus; canthus exceeding the outer margin of the eye; meso- and metatibia quadrate or sub-quadrate in cross section, metafemur with thick and erect bristles on posterior margin; pygidial width exceeding distance between spiracles of propygidium; pygidial disc scaly throughout; female pygidium wider than in males. Male genitalia, parameres slightly asymmetri cal; basal region narrower than the parameres together at its maximum width; apex rounded (Fig. 59F).

Redescription.

Length: 10.5-12.0 mm; width: 5.7-6.5 mm. Reddish brown. Head: distance between eyes nearly twice the width of one eye; frons equal in length to clypeus; clypeal emargination deep, narrow and rounded; clypeal teeth longer in males; outer sides of anterior teeth sub-parallel, slightly divergent; outer margin of anterior teeth longer than the eye; clypeal lateral margin concave; canthus exceeding the outer margin of the eye; distal maxillary palpomere, maximum width twice width of apex; fovea deep, extending past the transverse midline of the palpomere; labium transversely carinated, as wide as it is long; antenna 10-articulated, lamellae lighter in color than flagellum, in males lamellae and flagellum equal in length. Thorax: anterior margin of pronotum straight; maximum length of pronotum exceeding the length of tarsomeres I, II and III together; disc glabrous, punctures coarse and dense, coarser in females; pronotal posterior corners sharp, obtuse-angled; proepisternum with short bristles; pro- and mesepisternum scaly, as are the sides of metasternum; distance between meso- and metacoxae up to twice longer than the metacoxa; scutellum ogival to triangular, coarsely punctured, in males at the base. Elytra: shiny, glabrous, uniform reddish brown; elytra more than three times longer than the pronotum; elytral suture and elytron unicolored, not elevated; all four elytral ridges barely noticeable. Legs: procoxa scaly on infra-carinal and outer surface; punctures visible at 12 × magnification; three protibial teeth, middle and apical equal in size, the three teeth equally spaced; protibial inner apical spur present; mesofemural disc setose; mesotibia quadrate in cross section, mesotibial disc coarsely sculptured; two mesotibial transverse carinae, the apical one incomplete in males; basal apophysis of metacoxa produced beyond the outer margin of trochanter; metafemur with thick and erect bristles on posterior margin; metatibia with posterior discontinuous longitudinal carina; metatibial apical spurs of different lengths, the longest one shorter than the diameter of the tibial apex; inner margin of male metatibia carinated towards apex; inner surface setose; disc coarsely sculptured; metatibia not transversally carinated; basal metatarsomere equal to or slightly shorter than tarsomere II and as wide as; in males protarsomere II short and wide; in males pro- and mesotarsomeres I to IV enlarged, protarsomeres slightly wider than the mesotarsomeres; more than twice as wide as metatarsi; claw bifid, symmetrical, superior tooth longer and slightly narrower than the inferior; distance between teeth shorter than the inferior tooth. Abdomen: band of abundant scales visible at the lowest magnification beneath the outer margin of elytra; ventrites with short and long bristles and scales on disc and sides, propygidium visible, scaly; pygidium flat in lateral view, sub-quadrate, wide; pygidial width exceeding distance between spiracles of propygidium; pygidial disc setose throughout, with scales mainly; pygidial apex in males sub-quadrate. Parameres: basal region narrower than the parameres together at its maximum width, parameral split at 2/3; parameres slightly asymmetrical; inner margins slightly convex; apical edge rounded, apex shape indistinct from the rest of the paramere (Fig. 59F).

Type-locality.

BRAZIL. Minas Gerais, Buritis (Primeira Cachoeira Rio Urucuia).

Geographical distribution.

BRAZIL (PB, MT, DF, MG, SP).

Remarks.

There is one specimen in MZSP with paratype label, but it was collected from "Minas Gerais, Unaí, Faz. Bolívia”. Since the unique type-locality mentioned in the original description is "Minas Gerais, Buritis (Primeira Cachoeira Rio Urucuia)", this specimen is not part of the type series, so it has no nomenclatural value. Liogenys bilobata resembles L. diodon (Fig. 62) but differs in the size; lateral margin of clypeus being more concave (Fig. 20); canthus exceeding the outer margin of the eye; pronotal posterior corners sharp; abundant yellow scales on metasternum and sides of abdomen and throughout the pygidium, pygidial apex angled in males; metatibial disc more coarsely sculptured; metatibial outer longitudinal carina well defined in males and basal metatarsomere (I) as long as metatarsomere II.