RESUMEN
The derbid planthopper genus Hauptenia Szwedo, 2006 is reviewed. Two new species from China, H.beibengensis Sui & Chen, sp. nov. and H.daliensis Sui & Chen, sp. nov., are described and illustrated. A third species, H.tripartitaRahman et al., 2012, is recorded from China for the first time. An updated checklist and identification key to all ten known species of the genus Hauptenia are provided.
RESUMEN
Although many hypotheses have been proposed to understand the mechanisms underlying large-scale richness patterns, the environmental determinants are still poorly understood, particularly in insects. Here, we tested the relative contributions of seven hypotheses previously proposed to explain planthopper richness patterns in China. The richness patterns were visualized at a 1° × 1° grid size, using 14,722 distribution records for 1335 planthoppers. We used ordinary least squares and spatial error simultaneous autoregressive models to examine the relationships between richness and single environmental variables and employed model averaging to assess the environmental variable relative roles. Species richness was unevenly distributed, with high species numbers occurring in the central and southern mountainous areas. The mean annual temperature change since the Last Glacial Maximum was the most important factor for richness patterns, followed by mean annual temperature and net primary productivity. Therefore, historical climate stability, ambient energy, and productivity hypotheses were supported strongly, but orogenic processes and geological isolation may also play a vital role.
RESUMEN
The derbid genus Vekunta Distant, 1906 is reviewed. Two new species, V.bambusana sp. n. and V.pentaprocessusa sp. n., are described and illustrated from the southwest of China to give the genus twenty-nine species in China. A checklist and a key to species of the genus from China are also provided.
