Enderleina preclara Jewett, 1960 (Plecoptera, Perlidae), from the Venezuelan Guayana-A description of a putative female, nymph and egg.

The putative female, nymph and egg of Enderleina preclara are described from specimens collected in the Kukenán-tepui foothills and Acopán-tepui foothills and plateau of Venezuela. Morphological and molecular approaches were employed to characterize these stages. Diagnostic keys for males and females of the described Enderleina species are also presented. The nymph is also morphologically compared with those of other Enderleina species. Comments on the ecology of this species and erroneous information regarding the putative type locality of E. preclara are provided.

Study of antioxidant defense in four species of Perloidea (Insecta, Plecoptera).

The aim of the present work is to conduct a comparative study of oxidative states in the nymphs of four species of Plecoptera belonging to the superfamily Perloidea: Perla marginata (Panzer, 1799) (family Perlidae), Guadalgenus franzi (Aubert, 1963), Isoperla curtate Navás, 1924, and lsoperla grammatica (Poda, 1761) (family Perlodidae) in relation to their ecological and biological characteristics. For this, the activity of the following antioxidant enzymes was determined: superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), glutathione peroxidase (GPX), glutathione transferase (GST), and DT-diaphorase (DTD), together with lipid peroxidation. Glucose 6-phosphate dehydrogenase (G6PDH) was also determined. The four species studied were selected based on significant ecological and biological differences. The results obtained when studying different indicative parameters of the oxidative state of the nymph of different species showed that each has an important enzymatic antioxidant potential, and that differences among species are conditioned by the duration of the nymphal development period more than by whether they come from permanent or temporary habitats. Thus, Plecoptera, although traditionally considered as typical inhabitants of permanent waters, seem to have sufficient variability in physiological mechanisms, together with behavioral and ecological adaptations, to cope with potentially unfavorable conditions that may occur in temporary waters.