Dicrania chimu Clavijo-Bustos, Neita Moreno, & Fuhrmann, 2024

Clavijo-Bustos, Julián, Moreno, Jhon Cesar Neita & Fuhrmann, Juares, 2024, The genus Dicrania LePeletier & Audinet-Serville, 1828 (Coleoptera: Scarabaeidae: Melolonthinae: Macrodactylini) from Colombia with the description of a new species, Zootaxa 5458 (4), pp. 572-580 : 574-575

Dicrania chimu Clavijo-Bustos, Neita Moreno, & Fuhrmann , new species

Figures 1B, E–F , 2–3

Type material. Holotype. Male deposited in ICN-E: “ Colombia, Meta, Puerto López. / Mayo 10—1.996 / H. Restrepo, Leg. / Alt: 180m ” [white printed label] // “ Holotypus ♂ / Dicrania chimu n. sp. / Clavijo-Bustos, Neita Moreno & Fuhrmann, / 2024” [red printed label] // “ICN 034823” [white printed label with barcode].

Paratypes (5♂♂). Paratypes deposited in ICN-E, IAvH-E, MPUJ, UNAB . COLOMBIA: Meta: Puerto López , 180 m, 10.v.1996, H. Restrepo (2♂♂ ICN 034824 , 035726 in ICN-E, 1♂ ICN 035725 and IAvH-E- 203737 in IAvH-E); Puerto López, 4°6’1’’N 72°57’2’’W. 450 m, 27.v.2005, J. Castro (1♂ UnAB 4926 in UNAB); Puerto López, Remolinos , Centro Cafam , Piedra Candela , 240 m, 29.iv.2011, Ad hoc diurna, D. Bohórquez, C. Chaparro & S. Herrera (1♂ MPUJ) . Paratypes with yellow printed label “ Paratypus ♂ / Dicrania chimu n. sp. / Clavijo-Bustos, Neita Moreno & Fuhrmann, / 2024” .

Diagnosis. Antenna with nine antennomeres; eyes in dorsal view large and head about 1.8 times wider than the narrowest interocular distance; pronotum with lateral areas without punctures or setae; elytra with puncture indistinct, disc glabrous; protarsomere 1 with a truncate inner tooth; protarsomere 2 longer than wide; mesotarsomere 1 with an inner spatulate tooth; metatarsomere 2 with sparse setae, medial setae shorter than the length of tarsomere.

Description. Male holotype ( Fig. 2 ). Body length: 14.9 mm; Body maximum width (at half of elytra): 7.6 mm. Color: Entirely black. Setae yellowish brown, disc of pronotum with setae dark brown. Head ( Fig. 2E, I ): Large and pronotum about 1.8 times wider than head, eyes large and head about 1.8 times wider than the narrowest interocular distance, frontoclypeal suture slightly sinuous. Clypeus trapezoid, sparsely punctate than frons; anterior angles obtuse and deflected. Antenna with nine antennomeres, antennal club about 4.0 times longer than wide and with three lamellae. Pronotum: anterior, medial posterior areas and margins punctate and setose, setae on anterior area thin, short, setae on medial and posterior areas long; lateral areas without punctures or setae. Scutellum : Setose with a medial longitudinal impunctate area. Elytra: Glossy, striae indistinct, humerus rounded. Disc smooth, impunctate, and glabrous. Distal margin with thin setae, length of setae about two times longer than the distance between related punctures. Pygidium ( Fig. 2H ): As wide as long or almost so, surface punctate and setose; setae thin, short or long; punctures barely defined and thin. Ventrites: Ventrite V shorter than ventrite VI. Parameres ( Fig. 2F–G ): Slightly constricted medially in dorsal and lateral views. Legs: protarsomere 1 with a truncate inner tooth, protarsomere 2 longer than wide, and protarsomeres 2–4 slightly laterally compressed; each protarsal claw gradually deflected, outer tooth about 1.5 times longer than and 0.9 as wide as inner tooth. Mesotibia about 2.6 times longer than the width at the apex; mesotarsomere 1 with a spatulate inner tooth. Apex of metatibia with inner area slightly projected, projection blunt and about 0.3 times as long as the length of remainder of apex; metatarsomere 2 with sparse setae, medial setae shorter than the length of tarsomere; metatarsomere 4 with distal inner setae as wide as other tarsomere setae or almost so; each metatarsal claw gradually deflected, outer tooth about 1.8 times longer than and 0.7 as wide as the inner tooth.

Female. Unknown.

Variation. Body length: 12.5–14.1 mm; Body maximum width (at half of elytra): 5.9–7.4 mm.

Distribution. Known only from the type series collected in the municipality of Puerto López, Meta Department, Colombia ( Fig. 5A ).

Etymology. Chimú (or Chimó) is a traditional pre-Colombian dark, shiny, and paste-like extract of tobacco ( Nicotiana tabacum L.; Solanaceae ) made by aboriginals of the Llanos region of Colombia and Venezuela. Dicrania chimu is also from the Llanos Orientales region of Colombia and is dark shiny black, just like chimú . The epithet is a noun in apposition.

Taxonomic remarks. Dicrania chimu is the only species of the D. castaneipennis species group with large eyes.

Figures

FIGURE 1. Dicrania diagnostic morphological characters. A, Dicrania laevipennis Moser, 1921 male, head and pronotum in dorsal view; B, D. chimu new species male paratype, scutellum in dorsal view; C, D. laevipennis male, protibia; D, D. laevipennis male, metacoxa in dorsal view; E, D. chimu male paratype, metafemora in ventral view; F, D. chimu male paratype, lateral internal view of metatarsomeres 4–5.

FIGURE 2. Dicrania chimu, new species, male holotype. A, Dorsal view; B, lateral view; C, ventral view; D, labels; E, head and pronotum in dorsal view; F, aedeagus in lateral view; G, aedeagus in distal view; H, pygidium in caudal view; I, antenna in dorsal view.

FIGURE 3. Dicrania chimu, new species, male paratype. A, Protarsal claw; B, mesotarsal claw; C, metatarsal claw; D, apex of protibial; E, apex of mesotibia; F, apex of metatibia; G, mesotarsomere 1 in ventral view; H, mesotarsomere 1 in lateral internal view.

FIGURE 5. Distribution of the Dicrania species from Colombia. A, Colombia; B, known distribution of Dicrania laevipennis Moser, 1921.