Comparative morphology of female gonapophyses IX in Delphacidae (Hemiptera: Auchenorrhyncha: Fulgoromorpha) with key to tribes Author Wallner, Adam M. Author Bartlett, Charles R. text Zootaxa 2019 2019-03-05 4564 1 137 172 journal article 28428 10.11646/zootaxa.4564.1.5 9b7dd2d2-8b30-426f-92c7-531b05c3ea53 1175-5326 2588807 5EA3EB07-F3FD-4F05-9478-EAE0AA797CDE Tribe Stenocranini Wagner Description . Gonapophyses IX mostly broad and spatulate dorsally, predominately curvilinear laterally ( Figs 11– 14 ), average length 844.71–1740.74 µm, width 45.56–178.49 µm; teeth variable in shape and frequency, ranging from as a few as 12 on Stenocranus sp. ( Kyrgyzstan , Fig. 12A ) to 30 for Embolophora monoceros ( Fig. 11A ); teeth morphology varied from numerous short, sharp teeth; short and square-shaped; slanted and lobed; irregular-shaped flattened plates; notched teeth on distal half to third ( Figs 11–14 ). Pits or sensory structures near gonapophyses margins, sometimes (in dorsal view) concentrated near center ( Fig. 11A ). Specialized features include nodulate teeth on Stenocranus sp. ( Kyrgyzstan ; Fig. 12A ); lateral teeth and a greatly projecting conical apex on Tanycranus elongatus ( Fig. 14A ); and three Old World genera [viz., E . monoceros ( Fig. 11A ), Terauchiana singularis ( Fig. 13A ), and S. agamopsyche ( Fig. 12C )] with concavity between teeth and shaft of gonapophyses. Notes. Stenocranini is composed of 10 genera in 93 species. The greatest diversity of the tribe is Holarctic, especially Asia, with few taxa in the southern Hemisphere (e.g., Embolophora Stål in Africa, Tanycranus Bartlett in South America) ( Bartlett 2005 , 2010a ). Host associations are almost exclusively graminoids, with some species reported on ferns, and Equisetum (horsetail) ( Bartlett 2010a , Urban et al. 2010 ).