Stenocranini Wagner, 1963

Wallner, Adam M. & Bartlett, Charles R., 2019, Comparative morphology of female gonapophyses IX in Delphacidae (Hemiptera: Auchenorrhyncha: Fulgoromorpha) with key to tribes, Zootaxa 4564 (1), pp. 137-172 : 154-155

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).

Figures

FIGURE 11. Lateral and select dorsal views of gonapophysis IX of Stenocraninae I: Stenocranini: A) Embolophora monoceros; B) Frameus simatus; C) Stenocranus fuscovittatus;

FIGURE 12. Lateral and select dorsal views of gonapophysis IX of Stenocraninae II: Stenocranini: A) Stenocranus sp. (Kyrgyzstan); B) S. similis; C) S. agamopsyche.

FIGURE 13. Lateral and select dorsal views of gonapophysis IX of Stenocraninae: Stenocranini III: A) Terauchiana singularis; B) Embolophora monoceros (dorsal); C) Frameus simatus (Dorsal); D) Stenocranus fuscovittatus (dorsal).

FIGURE 14. Lateral and select dorsal views of gonapophysis IX of Stenocraninae: Stenocranini III: A) Tanycranus elongatus, B. Stenocranus sp. (Kyrgyzstan).