Dicrania LePeletier & Audinet-Serville, 1828

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 : 573-574

Dicrania LePeletier & Audinet-Serville, 1828

Dicrania LePeletier & Audinet-Serville, 1828 .

Type species: Dicrania nigra LePeletier & Audinet-Serville, 1828 (subsequent designation by Blanchard 1843: plate 44).

Dicrania castaneipennis species group

Figures 1–4

The following five species comprise the D. castaneipennis species group: Dicrania castaneipennis Chevrolat, 1844 , Dicrania chimu , new species, Dicrania ebenina Blanchard, 1850 , D. laevipennis , and Dicrania signaticollis Moser, 1919 . This species group is diagnosed by the following combination of characters ( Figs. 1–4 ): antenna with nine antennomeres and antennal club with three lamellae; pronotum with at least lateroposterior areas without punctures or setae, if surface evenly setose, then setae short and thick; males with elytra puncture usually indistinct or almost so, smooth between punctures, disc usually glabrous, when disc evidently punctate and setose, then setae are thick and homogeneously distributed; female with posterior half of elytral lateral margin not beaded abdomen of female with ventrite VI with a medial tubercle-like process; male mesotarsomere 1 with an inner spatulate tooth; metatarsomere 2 with sparse setae, medial setae shorter than the length of tarsomere.

Key to Dicrania castaneipennis species group

(Females of D. chimu and D. signaticollis are unknown)

1 Males with venter of abdomen concave; pygidium directed downward ( Figs. 1E , 2B–C , 4B–C )....................... 2

1’ Females with venter of abdomen convex; pygidium directed backward ( Fig. 4F–G )................................. 6

2 Pronotum and elytra uniformly setose, disc of elytra homogeneously setose; Brazil: Pará ...................................................................................................... Dicrania signaticollis Moser, 1919

2’ At least posterolateral areas of pronotum without setae or punctures; disc of elytra glabrous ( Figs. 1A , 2A , 4A )........... 3

3 Eyes in dorsal view large and head about 1.8 times wider than narrowest interocular distance ( Fig. 2A, E, I ); Colombia: Meta ............................................................................. Dicrania chimu new species

3’ Eyes in dorsal view small and head about 1.5 times wider than narrowest interocular distance ( Figs. 1A , 4E )............. 4

4 Protarsomere 1 with a truncate inner tooth, protarsomere 2 wider than long ( Figs. 1A, C–D , 4B–C ); Colombia: Meta, Amazonas; French Guiana............................................................ Dicrania laevipennis Moser, 1921

4’ Protarsomere 1 with or without an inner tooth, protarsomere 2 longer than wide.................................... 5

5 Pronotum with anterolateral areas with punctures and setae sparse or indistinct, disc with two evident tufts of setae; French Guiana; Brazil: Pará ................................................... Dicrania castaneipennis Chevrolat, 1844

5’ Pronotum with anterolateral areas densely punctate and setose, disc without delimited setal tufts; French Guiana; Brazil: Goiás, Pará ..................................................................... Dicrania ebenina Blanchard, 1850

6 Frontoclypeal suture strongly sinuate; French Guiana; Brazil: Pará .............. Dicrania castaneipennis Chevrolat, 1844

6’ Frontoclypeal suture slightly sinuate ( Fig. 4F–G )............................................................ 7

7 Elytra smooth or finely and sparsely punctate, punctures indistinct under magnification of 1–20x; French Guiana; Brazil: Goiás, Pará ..................................................................... Dicrania ebenina Blanchard, 1850

7’ Elytra distinctly punctate ( Fig. 4F–G ); Colombia: Meta, Amazonas; French Guiana...... Dicrania laevipennis Moser, 1921

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 4. Dicrania laevipennis Moser, 1921. A, Male from Colombia, dorsal view; B, male from Colombia, lateral view; C, male from Colombia, ventral view; D, male from Colombia, aedeagus in lateral view; E, male from Colombia, aedeagus in distal view; F, female from French Guiana, dorsal view; G, female from French Guiana, lateral view.