Grandolobus
Ball, 1932
Species Guides
1Grandolobus is a of treehoppers in the Membracidae, Smiliinae, tribe Smiliini. The genus contains three recognized : G. grandis, G. inaequalis, and G. vittatipennis. Like other members of the Smiliini, these insects possess enlarged, often elaborately modified pronota that extend over the body. The genus was established by Ball in 1932 and is native to North America, with records from the southwestern United States including Arizona.
Pronunciation
How to pronounce Grandolobus: /ɡrænˈdoʊloʊbəs/
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Identification
Grandolobus can be distinguished from related in the tribe Smiliini by its characteristic pronotal structure, which features large, rounded lobes. The genus name itself references this trait (grandis = large, lobus = lobe). Among Smiliini, it differs from Cyrtolobus and Telamona in specific pronotal contour and lobe development. Accurate identification to level requires examination of pronotal shape, coloration patterns, and male genitalia. Specimens are medium-sized for the tribe, with G. grandis being notably large relative to many Nearctic smiliines.
Distribution
The occurs in North America. Grandolobus grandis has been recorded from Arizona, USA. The distribution of G. inaequalis and G. vittatipennis is less documented in available sources, though both were described by Fowler from material likely originating in the Americas.
Similar Taxa
- CyrtolobusBoth belong to tribe Smiliini and share enlarged pronota, but Cyrtolobus typically exhibit more angular or differently contoured pronotal projections, and the genus is more broadly distributed across eastern and central North America.
- TelamonaAnother Smiliini with pronounced pronotal modifications; Telamona often show more elaborate pronotal processes and different overall body proportions, with many species occurring in eastern North America.
- XantholobusShares tribal affiliation and general body plan, but differs in pronotal coloration patterns and lobe configuration; Xantholobus often show distinct yellow or pale markings.
More Details
Species composition
The contains three : Grandolobus grandis (Van Duzee), G. inaequalis (Fowler), and G. vittatipennis (Fowler). The latter two species were originally described in other genera and later transferred to Grandolobus.
Collection records
Specimens of G. grandis have been documented in private collections from Arizona, suggesting the may be more frequently encountered in the southwestern United States than published records indicate.