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Three groups of beetles inhabit cones of cycads (Cycadales) in the northern hemisphere and are believed to be involved in their pollination. The primitive weevil subtribe Allocorynina (Coleoptera: Belidae) is restricted to the New World cycad genera Dioon Lindl. and Zamia L. One group of weevils (Curculionidae), found only in Cycas L., appears to be a relatively recent colonizer of northern hemisphere cycads. Members of the beetle subfamily Pharaxonothinae (Erotylidae) occur in all Asian and New World cycad genera. Phylogenetic trees of these beetles, based on DNA analysis and supported with morphological studies, are compared to patterns of continental drift and cycad phylogenies. Laurasian origins are suggested for these beetle groups with high latitude dispersal for at least one of these groups during periods of global warm climates.
The beetle genus Pharaxonotha Reitter (Coleoptera: Erotylidae: Pharaxonothinae) is found in the cones of cycad genera in the New World, including species of Ceratozamia Brongn., Dioon Lindl., Microcycas (Miq.) A.DC and Zamia L. Its presence and diversity are analyzed for the 17 species of Zamia known to occur in Panama. Nine species are recognized, and five new species are described: Pharaxonotha clarkorum Pakaluk, P. confusa Pakaluk, P. fortunensis Tang, Skelley and Taylor new species, P. holzmani Tang, Skelley and Taylor new species, P. kirschii Reitter, P. manicatae Tang, Skelley and Taylor new species, P. panamensis Tang, Skelley and Taylor new species, P. pseudoparasitica Tang, Skelley and Taylor new species, and P. taylori Skelley and Tang. A key to species of Pharaxonotha in Panama is presented.
ZooBank registration. urn:lsid:zoobank.org:pub:C054B0D4-FD00-4AE7-BBA7-C75A12368561
The beetle genus Pharaxonotha Reitter (Coleoptera: Erotylidae: Pharaxonothinae) is found in the cones of cycad genera in the New World, including species of Dioon Lindl., Ceratozamia Brongn., Microcycas (Miq.) A.DC and Zamia L. In this paper nine new species found in Dioon are described by Skelley, Tang and Pérez-Farrera: Pharaxonotha bicolor, P. dimorpha, P. fawcettae, P. gigantea, P. novoai, P. occidentalis, P. sclerotiza, P. woodruffi, P. vovidesi. A key to described species of Pharaxonotha inhabiting Dioon is presented, along with an account of Pharaxonotha kirschii Reitter for comparison.
Two species of the early-diverging lineages of Pharaxonotha Reitter (Coleoptera: Erotylidae: Pharaxonothinae) are described: Pharaxonotha taylori Skelley and Tang, new species, and Pharaxonotha thomasi Skelley and Tang, new species. A new key to described species of Pharaxonotha, based on previously unused characters, is presented.