Abstract
Alasia alpina is described as a new genus and species from high altitude cloud forests in Heredia, Costa Rica. Morphologically it is distinctive by its overall smooth shiny surface, dark-brown to black coloration, elongate body form; very long antennae, long, slender femora, broadly triangular, subconcave frons with shagreened surface, elytra weakly striate, and structure of the genitalia and metafemoral spring. It apparently prefers Melastomataceae host plants in the forest understory. It is most similar to Pseudostenophyma modesta com. nov. from which it differs in morphology, color, size, altitude of occurrence, and habitat. Stenophyma elegans Baly (type species) was discovered not to be congeneric with the other species in that genus S. modesta Weise, resulting in Pseudostenophyma being established as a new generic name for this taxon (P. modesta).References
Baly, J. S. (1877) Descriptions of new genera and of uncharacterized species of Halticinae. Transactions of the Entomological Society of London, 1877, 2, 157–184.
Furth, D. G. (1979) Zoogeography and host plant ecology of the Alticinae of Israel, especially Phyllotreta: with descriptions of three new species (Coleoptera: Chrysomelidae). Israel Journal of Zoology 28, 1, 1–37.
Furth, D. G. (1980) Wing polymorphism, host plant ecology, and biogeography of Longitarsus in Israel (Coleoptera: Chrysomelidae). Israel Journal of Entomology 13,125–148.
Furth, D. G. (1998) Revision of the New World Blepharida (Coleoptera: Chrysomelidae: Alticinae). Memoirs of the Entomological Society of Washington 21, 1–109.
Furth, D. G., Longino, J. & Paniagua, M. (2003) Survey and quantitative assessment of flea beetle diversity in a Costa Rican rainforest (Coleoptera: Chrysomelidae: Alticinae). In: Furth, D. G., Ed.), Proceedings of the Fifth International Symposium on the Chrysomelidae. Pensoft Publishers, Sofia, pp. 1–23.
Furth, D. G. & Suzuki, K. (1998) Studies on Oriental and Australian Alticinae genera, based on the comparative morphology of the metafemoral spring, genitalia, and hind wing venation. Proceedings of the Fourth International Symposium on the Chrysomelidae. M. Biondi. M. Daccordi and D. Furth (Eds.). Atti Museo Regionale Scienze Naturali Torino 1998: 91–124.
Heikertinger, F. & Csiki, E. (1940) Coleopterorum Catalogus, Halticinae, II, 25 (169): 337–635.
Konstantinov, A. S. (1998) Revision of the Palearctic species of Aphthona Chevrolat and cladistic classification of the Aphthonini (Coleoptera: Chrysomelidae: Alticinae). Memoirs on Entomology, International 11, 1–429.
Konstantinov, A. S. & Vandenberg, N. J. (1996) Handbook of Palearctic Flea Beetles (Coleoptera: Chrysomelidae: Alticinae). Contributions on Entomology, International, 1, 3, 1–439. Associated Publishers, Gainesville.
Samuelson, G. A. (1994) An elytron to body meshing mechanism of possible significance in the higher classification of Chrysomelidae (Coleoptera). In: D. G. Furth (ed.) Proceedings of the Third International Symposium on the Chrysomelidae, Beijing, 1992. Backhuys Publishers, Leiden. pp. 136–147.
Scherer, G. (1962) Bestimmungsschlussel der neotropischen Alticinen-Genera. Entomologishe Arbeiten au dem Museum G. Frey, 13, 497–607.
Scherer, G. (1983) Diagnostic key for the Neotropical alticine genera Coleoptera: Chrysomelidae: Alticinae. Entomologische Arbeiten aus dem Museum G. Frey 31/32,1–89. [English translation of Scherer 1962]
Seeno, T. N. & Wilcox, J. A. (1982) Leaf beetle genera Coleoptera: Chrysomelidae. Entomography 1: 1–221.
Weise, J. (1921) Wissenschaftliche Ergebnisse der schwedischen entomologischen Reise des Herrn Dr. A. Roman in Amazonas 1914–1915. Arkiv för Zoologi, 14, 1, 1–205.