Abstract
Compsodactylus new genus and C. scabrosus new species are described and C. martinezi (Frey, 1972) new combination and C. parvulus (Frey, 1970) new combination are redescribed and transferred from Dicrania LePeletier & Audinet-Serville, 1828. The new genus is placed in Macrodactylini (Coleoptera: Scarabaeidae: Melolonthinae) and occurs in the South American Andean and Preandean regions. A key to the species, modification on the recent generic key to Macrodactylini, and distributional map are presented.
References
Borgmeier, T. (1939) Dicrania velutina Cast. (Col.) em flores de orchideas. Revista de Entomologia, 10, 729.
Browne, D.J. & Scholtz, C.H. (1994) The morphology and terminology of the hindwing articulation and wing base of the Coleoptera, with specific reference to the Scarabaeoidea. Systematic Entomology, 19, 122–143.
Evans, A.V. (2003) A checklist of the New World chafers (Coleoptera: Scarabaeidae: Melolonthinae). Zootaxa, 211, 1–458.
Evans, A.V. & Smith, A. B. T. (2005) An electronic checklist of the New World chafers (Coleoptera: Scarabaeidae: Melolonthinae). Version 1 [online]. Available from: http://digitalcommons.unl.edu/entomologypapers/2/ (accessed 17 October 2012).
Evans, A.V. & Smith, A. B. T. (2007) An electronic checklist of the New World chafers (Coleoptera: Scarabaeidae: Melolonthinae). Version 2 [online]. Available from: http://museum.unl.edu/research/entomology/Guide/Scarabaeoidea/Scarabaeidae/Melolonthinae/Melolonthinae-Catalog/NW-Melo-v2.pdf (accessed 3 November 2012).
Evans, A.V. & Smith, A.B.T. (2009) An electronic checklist of the New World chafers (Coleoptera: Scarabaeidae: Melolonthinae). Version 3 [online]. Available from: http://museum.unl.edu/research/entomology/SSSA/nwmelos.htm (accessed 17 October 2012).
Frey, G. (1970) Beitrag zur Kenntnis der südamerikanischen Melolonthiden (Col.). Entomologische Arbeiten aus dem Museum G. Frey, 21, 281–287.
Frey, G. (1972) Bestimmungstabelle der Gattung Dicrania Serv. (Coleoptera – Melolonthinae – Macrodactylini). Entomologische Arbeiten aus dem Museum G. Frey, 23, 67–85.
International Plant Names Index (2005) The International Plant Names Index [online]. Available from: http://www.ipni.org (5 November 2011).
Katovich, K. (2008) A generic-level phylogenetic review of the Macrodactylini (Coleoptera: Scarabaeidae: Melolonthinae). Insecta Mundi, 23, 1–78.
Katovich, K. (2011) Pseudopectinosoma Katovich, new genus, and review of Pectinosoma Arrow (Scarabaeidae: Melolonthinae: Macrodactylini). The Coleopterists Bulletin, 65, 335–340.
Krell, F.-T. 1996. Die Kopulationsorgane des Maikäfers Melolontha melolontha (Insecta: Coleoptera: Scarabaeidae). Ein Beitrag zur vergleichenden und funktionellen Anatomie der ektodermalen Genitalien der Coleoptera. Stuttgarter Beiträge zur Naturkunde, Serie A (Biologie), 537, 1–101.
Krenn, H.W., Plant, J.D., & Szucsich, N.U. (2005) Mouthparts of flower-visiting insects. Arthropod Structure & Development, 34, 1–40.
Kukalová–Peck, J. & Lawrence, J.F. (1993) Evolution of the hind wing in Coleoptera. Canadian Entomologist, 125, 181–258.
Kukalová–Peck, J. & Lawrence, J.F. (2004) Relationships among coleopteran suborders and major endoneopteran lineages: Evidence from hind wing characters. European Journal of Entomology, 101, 95–144.
Lacroix, M. (2007) Pachydeminae du Monde (Scarabaeoidea, Melolonthidae). Genera et Catalogue Commenté. Marc Lacroix, Paris, 450 pp., 264 plates.
Panero, J.L. & Schilling, E.E. (1988) Revision of Viguiera sect. Maculatae (Asteraceae: Heliantheae). Systematic Botany, 13, 371–406.
Ritcher, P.O. (1966) White Grubs and Their Allies. Oregon State University Press, Corvallis, Oregon, USA, 219 pp.
Sanmartín, I. & Martín-Piera, F. (2000) First phylogenetic analysis of the subfamily Pachydeminae (Coleoptera, Scarabaeoidea, Melolonthidae): the Palearctic Pachydeminae. Journal of Zoological Systematics and Evolutionary Research, 41, 2–46.
Smith, A.B.T. (2008) South American Melolonthinae (Coleoptera: Scarabaeidae) classification and nomenclature: some problems and solutions. Insecta Mundi, 60, 1–28.
Snodgrass, R.E. (1993) Principles of insect morphology, with a new foreword by George C. Eickwort. Cornell University Press, Ithaca, USA, xiv + 667 pp.