Dermaptera

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 : 180

9 Dermaptera

The second tarsomere of the three­segmented tarsus is distinctly shorter than the others in representatives of Dermaptera excluding Hemimerus ( Gunther and Herter 1974; Figs 3d , 7D,E ). The two proximal tarsomeres usually bear a dense brush of hairs on the ventral side ( Gunther and Herter 1974). An arolium is found in hemimerines ( Gunther and Herter 1974; Haas and Gorb, unpublished data).

Figures

Fig. 3. Diversity of the leg attachment devices (gray­colored areas) in hexapods. (a) Arolium (smooth). (b) Pulvilli (smooth or hairy). (c) Empodial pulvillus (ep) (hairy). (d) Hairy adhesive soles of tarsomeres. (e) Eversible pretarsal bladder (smooth). (f) Eversible structure between tibia and tarsus (smooth). (g) Fossula spongiosa (hairy). (h) Euplantulae (eu) and claw pad (cp) (both smooth). (i) Tarsal thorns transformed into adhesive structures (th), claw pad (cp) (both smooth). (j) Adhesive claw setae

Fig. 7. Details of hexapod tarsi and pretarsi. (A) Bibio nigriventris (Diptera), hindleg, pretarsus, ventral aspect. (B) Rhamphomya nigripes (Diptera), hindleg, ventral aspect. (C, F) Episyrphus balteatus (Diptera), midleg, pretarsus, ventral aspect. (D, E) Forficula auricularia (Dermaptera), hindleg, tarsus, ventral aspect. (G, H) Ceratophyllus sp. (Siphonaptera), midleg, pretarsus, ventral (G) and lateral (H) aspects. EM, empodium; HS, hairy soles; PT, hair plate; PU, pulvilli; SH, hair shaft; TAR, tarsal segments; TH, specialized tarsal adhesive thorns; UN, claw; UT, unguitractor plate