Liogenys laminiceps Moser, 1919

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 : 38-41

Liogenys laminiceps Moser, 1919 Figs 65, 91

Liogenys laminiceps Moser, 1919: 16 (orig. desc.); Blackwelder 1944: 227 (check.); Frey 1969: 38 (key); Evans 2003: 210 (check.); Evans and Smith 2005: 174 (check.); Evans and Smith 2009: 178 (check.).

Type material.

Liogenys laminiceps male holotype (ZMHB): [white printed] "Brasilia/ [handwritten] Sao Paulo", [white handwritten] " Liogenys / laminiceps /Mos/Typen", [light red printed] “Typus”, [white printed] " Liogenys / laminiceps /Mos.", [red printed] "HOLOTYPUS/ Liogenys / laminiceps Moser, 1919/labelled by MNHUB 2013". Genitalia mounted.

Diagnosis.

Body and elytra reddish brown; elongate, widest at posterior third; pronotum darker; clypeal emargination shallow, rounded and wide; outer sides of anterior teeth parallel; clypeal lateral margin convex, with a rounded projection, obtuse angle between outer side of anterior teeth and clypeal lateral projection; antenna 9-articulated; pronotal disc punctures very sparse; pronotal posterior corners sub-angled, obtuse; mesotibia quadrate in cross section; metafemur with thick and erect bristles on posterior margin; pygidium convex; in males, parameres widened from the midline towards the apex, maximum width subapically; apex rounded; inner margins convergent (Fig. 65F).

Redescription.

Length: 9.8 mm; width: 5.5 mm. Reddish brown. Head: distance between eyes nearly twice the width of one eye; frons shorter than clypeus; clypeus bristled anteriorly; clypeal emargination rounded, shallow and wide; outer sides of anterior teeth parallel; outer margin of anterior teeth shorter than the eye; clypeal lateral margin convex, with a rounded projection; distance between this projection and anterior tooth shorter than basal width of anterior tooth, distance between clypeal lateral projection and anterior margin of eye shorter than one eye; obtuse angle between outer side of anterior teeth and clypeal lateral projection; canthus not exceeding the outer margin of the eye; distal maxillary palpomere, maximum width slightly wider than the apex; fovea deep and elongate, extending to or past the transverse midline of the palpomere; labium transversely carinated, as wide as it is long; antenna 9-articulated, lamellae lighter in color than flagellum and equal in length. Thorax: anterior margin of pronotum straight, flanged throughout; maximum length of pronotum exceeding the length of tarsomeres I, II and III together; disc glabrous, punctures very sparse and coarse; pronotal posterior corners sub-angled, obtuse; proepisternum with long bristles; mesepisternum scaly; sides of metasternum scaly and bristled, few long bristles on the anterior margin; distance between meso- and metacoxae up to twice longer than the metacoxa; scutellum rounded, coarsely punctured. Elytra: shiny, glabrous, uniform reddish brown; elytra more than three times longer than the pronotum; elytral suture and elytron unicolored, distinctly 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, with a row of long bristles on anterior and posterior margins; mesotibia quadrate in cross section, disc finely sculptured; two mesotibial transverse carinae, the apical one incomplete; basal apophysis of metacoxa produced beyond the outer margin of trochanter; metafemur with thick and erect bristles on posterior margin; inner margin of metatibia carinated towards apex; inner surface setose; disc finely sculptured; metatibial transverse carina present posteriorly and posterior discontinuous longitudinal carina; metatibial apical spurs of different lengths, the longest equal in length to the diameter of the tibial apex; basal metatarsomere wider than tarsomere II and equal in length; protarsomere II short and wide; pro- and mesotarsomeres I to IV enlarged, protarsomeres slightly wider than the mesotarsomeres and more than twice as wide as metatarsi; claw bifid, symmetrical, superior tooth longer and as wide as the inferior; distance between teeth as long as the inferior tooth. Abdomen: band of scales visible at the lowest magnification beneath the outer margin of elytra; ventrites bristled on disc and sides; propygidium visible, bristled and scaly; pygidium convex, sub-trapezoidal, wide, pygidial width not exceeding distance between spiracles of pro pygidium, pygidial disc bristled throughout; pygidial apex rounded. Parameres: basal region with parameral split at 2/3; parameres widened from the midline towards the apex, maximum width subapically (Fig. 65F); apex rounded; inner margins convergent. In lateral view parameres concave (Fig. 65G).

Type-locality.

BRAZIL. São Paulo.

Geographical distribution.

BRAZIL (SP).

Remarks.

Liogenys laminiceps is one of the few species with antenna 9-articulated, together with L. sinuaticeps (Fig. 72) and L. flavida , a southern Argentinian species. The last two species are easily differentiated from L. laminiceps because they are yellowish and with sides of body being almost parallel. The female of L. laminiceps remains unknown.