Dicrania LePeletier & Audinet-Serville 1828
Creators: name: Clavijo-Bustos, Julián
name: Moreno, Jhon Cesar Neita
name: Fuhrmann, Juares
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Dicrania

description: 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
description: Published as part of 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, pp. 572-580 in Zootaxa 5458 (4) on pages 573-574, DOI: 10.11646/zootaxa.5458.4.5, http://zenodo.org/record/11548011