Dendropaemon (Glaphyropaemon) inemarginatus Génier & Arnaud, 2016

François Génier & Patrick Arnaud, 2016, Dendropaemon Perty, 1830: taxonomy, systematics and phylogeny of the morphologically most derived phanaeine genus (Coleoptera: Scarabaeidae, Scarabaeinae, Phanaeini), Zootaxa 4099 (1) : 52-53

25. Dendropaemon (Glaphyropaemon) inemarginatus Génier & Arnaud , new species

( Fig. 25 , 158 )

Dendropaemon (D.) refulgens: Martínez & Clavijo 1990 , Bol. Ent. Ven. N.S. 5: 155 (biology)

Type locality. Coromoto, Departamento Atures, Territorio Federal Amazonas, Venezuela.

Diagnosis. The only species in the genus with a vestigial posterior pronotal margin. In some species the margin is reduced but always visible on a distance laterally and medially.

Description. Female holotype ( Fig. 25 ). Body. Body moderately large, length 13.0 mm, maximum width 6.5 mm; body subrectangular in dorsal view; dorsum slightly convex. Color. Dorsal surface dark brown to black, glossy, with green metallic sheen; head with green metallic sheen on posterior portion of clypeus, genae and frons; pronotum with green metallic sheen except for anteromedian carina, on anterior portion of disc and surface adjacent to lateral fossae; elytra with uniform green metallic sheen; ventrum reddish brown to dark brown; pygidium with green metallic sheen; legs reddish brown to dark brown. Head. Clypeus broadly arcuate, anterior portion upturned; clypeal teeth ogival; clypeal median emargination narrowly v-shaped, clypeal edge acutely notched on external side of each clypeal tooth, clypeal teeth ventral surface lacking carina, clypeal margin illdefined, lacking sharp carina posteriorly, clypeal surface with transverse blunt rugulae; clypeogenal suture welldefined, bluntly carinate internally; genal surface irregularly punctate, transversally and shallowly sulcate on posterior half; clypeofrontal carina rather low, approximately 4 times wider than high, slightly arcuate in dorsal view, simply carinate, clypeofrontal carina apical edge straight in frontal view; eyes small in dorsal view, interocular ratio 5.8. Pronotum. Pronotum transverse in dorsal view, pronotal width/length ratio 1.4; disc of pronotum minutely punctate basally, puncture becoming fine anteriorly, with an ill-defined shallow longitudinal depression on posterior half; pronotal anterior margin wider and flat lateral to eyes; anterior portion with a trisinuous carina, carina produced into a tubercle medially; anterior angles surface simply punctate, slightly but distinctly sulcate along posterior edge of anterior margin; lateral fossae simply rounded, concave; lateral portions unmodified; pronotal basal fossae ill-defined, slightly concave; posterior margin vestigial, reduced to a minute interrupted carina throughout. Elytra. Elytra approximately as long as wide in dorsal view, elytral combined width/ length ratio 1.1; elytral base lacking distinct margin, simply convex; elytral striae 1–4 moderately wide basally and fine apically, evenly impressed throughout, elytral striae 5 atrophied, lacking fine carina on each side on disc, strial punctures fine and well-defined, adjacent strial edge encroaching on interval, stria 1 well-defined apically, connecting to marginal stria; interstriae slightly convex, minutely punctate throughout, surface glossy. Thoracic sterna. Proepisternal carina complete, extending laterally; metasternal median lobe angularly produced anteromedially, ventral ridge well-defined, v-shaped. Legs. Profemur posterior surface slightly but distinctly convex, rather coarsely punctate and glabrous internally, posterointernal margin rather thin, evenly developed, internal edge rather wide, with a contiguous row of setae along anterointernal edge and few scattered long setae on anterior half, remaining surface smooth. Protibia with four teeth on lateral edge; internal basal angle lobate; anterior surface with long aligned row of setae internally, surface glossy or feebly microsculptured between punctures; posterior surface with rugose irregular punctures externally to median carina, surface finely and irregularly microsculptured between punctures, with a single interrupted setal row along lateral teeth. Mesofemur angularly produced on anterointernal edge apically. Mesotibia rather short, gradually widening toward apex in anterior view; anteroapical edge slightly sinuate in anterior view, anteroapical row of setae complete; apicoanterior edge circularly indented internally; external edge more or less rounded, with several large elongate setiferous punctures. Mesotarsus similar in shape to metatarsus, 3-segmented, first segment short, approximately as long as wide at apex. Metafemur broadly oval in anterior view, lacking distinct depressed area anterointernally before apex, apicoposterior edge unmodified, anterior surface with a well-defined sulcus on more than half the length. Metatibia moderately slender, slightly widening toward apex in anterior view, anterior surface with distinct row of setae, with fine irregular punctures on a glossy surface, metatibial posterior surface flat between longitudinal row of setae and lateral edge, glossy between punctures. Metatarsus 3-segmented, first segment short, approximately as long as wide at apex, with anterointernal carina well defined and almost reaching apical edge. Abdominal sternites. Sternites 3–6 longitudinally flat; sternites 4–6 with 1–3 unaligned rows of setae laterally, glabrous medially; sternite 7 approximately longitudinally flat medially, shorter than segment 6 along midline; pygidium finely punctate on disc.

Measurements (1 female). Length: 13.0 mm.

Primary type data. Female holotype (CMNC): [Marz-979/ VENEZUELA / T.F.Amazonas/ D o Atures/ Coromoto/ G.y H.Martínez-leg./ Coll. A. Martínez] handwritten; [H. & A. HOWDEN/ COLLECTION/ ex. A. Martínez coll.]; [WORLD/ SCARAB./ DATABASE/ WSD00016731]; [HOLOTYPE ♀/ Dendropaemon / inemarginatus n.sp. / Génier & Arnaud, 2014] red card.

Material examined. Primary type only.

Etymology. Inemarginatus , without + margin, an adjective referring to the configuration of the posterior pronotal margin.

Natural history. The holotype was collected in a zone of loose and sandy soil in the early hours of the morning ( Martínez & Clavijo, 1990).

Remarks. Male and variation unknown.

Superficially resembling species of Coprophanaeoides , however, the presence of a complete proepisternal carina place this species within Dendropaemon s. str. where it seems to occupy an isolated position.

Figures

FIGURE 158. Known distribution of D. convexus, D. fredericki, D. angustipennis, D. bahianus, D. inemarginatus, D. nigritulus.

FIGURES 25 – 30. Dorsal habitus. 25. D. inemarginatus, female holotype; 26. D. nigritulus, male holotype; 27. D. amyntas, male; 28. D. attalus, male holotype; 29. D. lydiae, male holotype; 30. D. morettoi, male holotype.