Auchenorrhyncha

R. G. Beutel & S. N. Gorb, 2001, Ultrastructure of attachment specializations of hexapods (Arthropoda): evolutionary patterns inferred from a revised ordinal phylogeny, J. Zool. Syst. Evol. Research 39, pp. 177-207 : 181

23 Auchenorrhyncha

Tarsi are three­segmented. An arolium has evolved in cicadids and cercopids ( Fig. 4e ). The arolium cuticle has a characteristic inner structure of chitinous threads oriented at some angle to the surface ( Fig. 4J ).

Figures

Fig. 4. Details of hexapod tarsi and pretarsi. (A) Lepisma saccharina (Zygentoma), foreleg, pretarsus, lateral aspect. (B) Paraleptophlebia sp. (Ephemeroptera), midleg, pretarsus, ventral aspect. (C) Blatella germanica (Blattodea), midleg, tarsus, ventro­lateral aspect. (D) Omocestus viridulus (Caelifera), foreleg, tarsus, ventral aspect. (E) Cercopis vulnerata (Auchenorrhyncha), midleg, pretarsus, ventro­lateral aspect. (F) Chrysoperla carnea (Neuroptera), pretarsus, ventral aspect. (G, H) Schistocerca gregaria (Caelifera), foreleg, arolium sagittal section, triple stain after Cason. (I) Brachyptera risi (Plecoptera), midleg, arolium, sagittal section, triple stain after Cason. (J) Cercopis vulnerata (Auchenorrhyncha), midleg, sagittal section, triple stain after Cason. Black arrows indicate ventral directions. AR, arolium; CP, claw pad; EU, euplantulae; RD, chitinous threads; TAR, tarsal segments; TI, tibia; UN, claw, UN1, ephemeropteran hook­like claw, UN2, ephemeropteran pad­bearing claw