Liogenys spiniventris Moser, 1918

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 : 58-61

Liogenys spiniventris Moser, 1918 Figs 73, 90

Liogenys spiniventris Moser, 1918: 108 (orig. desc.); Blackwelder 1944: 228 (check.); Frey 1969: 47 (key); Evans 2003: 214 (check.); Evans and Smith 2005: 178 (check.); Evans and Smith 2009: 182 (check.).

Type material.

Liogenys spiniventris male syntype (ZMHB): [white printed] “Brasilia/[handwritten]Bahia”, [white handwritten] Liogenys / spiniventris /Mos./Typen", [red printed] “Typus”, [white printed] " Liogenys / spiniventris /Mos.", [red printed] "SYNTYPUS/ Liogenys / spiniventris Moser, 1918/labelled by MNHUB 2014". As it is the unique primary type, it is considered the holotype.

Diagnosis.

Body brownish; elongate; elytra testaceous, pronotum purplish brown, clypeal emargination sharp and wide; outer sides of anterior teeth parallel; clypeal lateral margin convex, with a tooth-like projection; right angle between outer side of anterior teeth and clypeal lateral projection; mesotibia quadrate in cross section; inner margin of metatibia abruptly sub-basally produced towards apex; ventrites IV and V produced medially (Fig. 73F); pygidium convex, as wide as it is long; pygidial disc bristled only on apex; parameres, width of basal region narrower than the parameres together at its maximum length, apex fusiform (Fig. 73G).

Redescription.

Length: 12.5 mm; width: 6.1 mm. Brownish. Head: distance between eyes nearly twice the width of one eye; frons swollen, equal in length to clypeus; clypeal emargination sharp, shallow and wide; outer sides of anterior teeth parallel; outer margin of anterior teeth shorter than the eye; clypeal lateral margin convex forming a tooth-like projection; distance between clypeal lateral projection and anterior margin of eye shorter than one eye; distance between clypeal lateral projection and anterior tooth shorter than basal width of anterior tooth; right 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 less than twice width of apex; fovea shallow, extending past the transverse midline of the palpomere; labium transversely carinated, as wide as it is long; antenna 10-articulated, lamellae lighter in color and longer than flagellum. Thorax: anterior margin of pronotum slightly produced medially; maximum length of pronotum exceeding the length of tarsomeres I, II and III together; disc glabrous, punctures fine and sparse; pronotal posterior corners sharp, almost right-angled; proepisternum with short bristles; mesepisternum scaly; sides of metasternum scaly and bristled, few long bristles on the anterior margin; dis tance between meso- and metacoxae up to twice longer than the metacoxa; scutellum ogival, finely punctured at the sides. Elytra: shiny, glabrous, uniformly testaceous, distinctly lighter in color than pronotum, elytra more than three times longer than the pronotum; elytral suture slightly darker than elytron and distinctly elevated; all four elytral ridges barely noticeable. Legs: procoxa bristled 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 coarsely sculptured; two mesotibial transverse carinae, the apical one incomplete; basal apophysis of metacoxa produced beyond the outer margin of trochanter; inner margin of metatibia carinated and abruptly sub-basally or medially produced up to the apex, apical inner surface setose; metatibial disc finely sculptured; metatibial transverse carina present posteriorly and posterior discontinuous longitudinal carina; metatibial spurs equal in length, length equal to the diameter of the tibial apex; basal metatarsomere and tarsomere II equal in size, 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 shorter than the inferior tooth. Abdomen: ventrites bristled on disc and sides; ventrites IV and V produced medially; propygidium visible, glabrous; pygidium convex; sub-trapezoidal, as wide as it is long; pygidial width not exceeding distance between spiracles of propygidium; pygidial disc bristled only on apex; pygidial apex quadrate. Parameres: width of basal region narrower than the parameres together at its maximum width; parameral split at the third portion; inner margins of parameres convergent; apex fusiform (Fig. 73G). In lateral view parameres straight not coplanar with basal region (Fig. 73H).

Type-locality.

BRAZIL. Bahia.

Geographical distribution.

BRAZIL (BA).

Remarks.

Liogenys spiniventris resembles L. testaceipennis (Fig. 76). The former differs in the shape of the clypeus, sharply emarginate, with a tooth-like projection laterally and in ventrites with different number of the medial projections (Figs 73, 76F). Female of L. spiniventris remains unknown.