title: Hydrolutos piaroa sp.n. (Orthoptera: Anostostomatidae), a new semiaquatic Lutosini species from south-western Venezuelan lowland streams.
abstract: Hydrolutos piaroa, a new species of Lutosini (Orthoptera: Anostostomatidae) from Tobogán de la Selva (Puerto Ayacucho region, SW Venezuela) is described and figured. Inhabiting aquatic environment it represents an unusual orthopteran with sternal and pleural area covered by fine microtrichia, forming a plastron. This is the first known Hydrolutos species sampled in lowland streams of Venezuelan Guayana.
authors.affiliation: Department of Ecology, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, Mlynská dolina, SK-84215 Bratislava, Slovakia; Email: unknown.
authors.forename: Tomáš
authors.initials: T
authors.lastname: Derka
authors.affiliation: Department of Biology and General Ecology, Faculty of Ecology and Environmental Sciences,Technical University in Zvolen, T.G. Masaryka 24, SK-960 53 Zvolen, Slovakia Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Aquatic Ecology, Centre of Ecology, Evolution and Biogeochemistry, Seestrasse 79, CH-6047 Kastanienbaum, Switzerland; Email: unknown.
authors.forename: Marek
authors.initials: M
authors.lastname: Svitok
authors.affiliation: Department of Environmental Ecology, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, Mlynská dolina, SK-84215 Bratislava, Slovakia; Email: fedor@fns.uniba.sk.
authors.forename: Peter
authors.initials: P
authors.lastname: Fedor
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D017753:Ecosystem; D005260:Female; D008297:Male; D009929:Organ Size; D009987:Orthoptera / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D045483:Rivers; D014687:Venezuela