PROC. ENTOMOL. SOC. WASH. 104(4). 2002. pp. 868-883 ENIGMATIC TREEHOPPER GENERA (HEMIPTERA: MEMBRACIDAE): DEIRODERES RAMOS, HOLDGATIELLA EVANS, AND TOGOTOLANIA, NEW GENUS Jason R. Cryan and Lewis L. Deitz (JRC) Laboratory for Conservation and Evolutionary Genetics, New York State Mu-seum, Albany, NY, 12230 U.S.A. (e-mail:
[email protected]); (LLD) Department of Entomology, Box 7613, North Carolina State University. Raleigh, NC 27695-7613, U.S.A. (e-mail:
[email protected]) Abstract — Two poorly known Neotropical treehopper genera, Deiroderes Ramos and Holilgatiella Evans, are revised and redescribed based on adult morphology. The Carib-bean genus Deiroderes (unplaced within the subfamily Stegaspidinae) has three valid species including D. inoniatus, new species (Jamaica). The Neotropical genus Holdi>a-tiella (cunently unplaced within Membracidae) has two valid species including //. stria^ new species (Venezuela). In addition, a previously unknown Caribbean genus is here described, Togotolania^ new genus, with two species: T. longicorna, new species (Do-minican Republic) and T. hrachycorna^ new species (Guadeloupe). All species included in these three genera are illustrated, and keys are given for the identification of adults. Key Words: Membracidae. Deiroderes, Holdgatiella, Togofolania, Caribbean, taxonomy Treehoppers (Hemiptera: Membracidae) are traditionally recognized by the enlarged pronotum, which in many species is con-spicuously ornamented with stalks, spikes, or bulbs. In most genera, there is at least a posterior pronotal process extending over (or even concealing) the scutellum. How-ever, the pronota of the Neotropical tree-hopper genera Deiroderes Ramos and Holdgatiella Evans are remarkably unre-markable. A third genus, Togotolania, de-scribed here as new, also has a simple pron-otum, adorned only with a median horn. These three genera are probably not closely related, indicating that enlarged pronotal or-namentation was likely gained or lost mul-tiple times in Membracidae. Other treehop-per genera lacking a posterior pronotal pro-cess occur in the subfamilies Nicomiinae. Endoiastinae, Centrotinae, and Stegaspidi-nae (fossils), though these may be cases of secondary loss. Following the most recent reclassifica-tions of Membracidae (Deitz and Dietrich 1993a. Dietrich et al. 2001a). Deiroderes and Holdgatiella were among several gen-era that remained unplaced within the tax-onomic framework. Although these two genera were originally described in the sub-family Centrotinae (Ramos 1957a, Evans 1962a), emerging morphological (Dietrich et al. 2001a, Cryan et al. in press) and mo-lecular (Cryan et al. 2000a, Cryan, unpub-lished data) evidence is revealing support for new phylogenetic placements within Membracidae, as discussed below. Materials and Methods Protocols used during this work follow the materials and methods described by Cryan and Deitz (1999a). The following codens are used to refer to the collections in which relevant specimens are located or
BioStor
