Arrow of fore tarsus (C) points to arolium
Legs slender; external apical spine of hind tibiae absent; arolium
Subterminal tarsal seta bifurcate; arolium
not divided, shorter than the slender and simple claws.
Dryinus of the constans group (group 1 of Olmi and Virla, 2014), comprises about 40 species, 12 from Brazil and it is characterized by the notaulice at least partly visible and enlarged claw, much longer than arolium
, with one subapical tooth and never with a broad apical lamella (Olmi et al., 2011; Olmi and Guglielmino, 2011; Olmi and Virla, 2014).
They are present as follows: leg I: light brown; lighter in color than body; trochanter weakly granulate; femur and patella granulate; patella joined with femur widely; patella 1.29-1.46 longer than femur; tibia granulate, prolateral margin curved distally; tibia slightly shorter and distinctly narrower than patella; tarsus weakly granulate; most setae with one lateral and few terminal denticulations; tibia with simple and long terminal seta; retrolateral margin of tarsus with denticulate setae (except terminal and subterminal setae) and prolateral margin with simple setae; claws symmetric and without teeth; and arolium
shorter than claws.
texana durante el vuelo nupcial, gracias al arolium
de gran tamano que poseen en sus patas (BROSSUT, 1976).
In his book The Semiaquatic Bugs, Andersen (1982) established the phylogeny of Gerromorpha, and diagnosed the clade on presence of three pairs of cephalic trichobothria inserted in deep cuticular pits; quadrangular mandibular levers; pretarsi with one dorsal and one ventral arolium
, and the female genital tract with a gynatrial complex, including a long tubular spermatheca and a secondary fecundation canal.
Insects' foot pad which includes arolium
, palmula and euplantula is an important organ for them to adhere to the slippery surface (CHEN, 2007).
Se utilizo la bandeja ya que estos insectos presentan unos pequenos arolium
tarsales los cuales se adhieren a la superficie, evitando su desplazamienlo (Mound y Marullo 1996; Steiner y Goodwin 1998).
Tarsi with 2 small claws each about as long as arolium
which is almost circular (Fig.
Different ages of nymphs may be distinguished on the basis of body size, the morphology of the pedipalps, and the presence of an arolium
(sac-like structure) and pseudonychium (small cuticular process ventral to the arolium
) on tarsus III and IV (Munoz Cuevas 1971).
well developed, gibbous, almost as long as tarsal claws.