Potapov M.B.1, Babenko A.B.2 2011. A new species of Isotomurus (Collembola: Isotomidae) without trichobothria // Russian Entomol. J. Vol.20. No.2: 113–117 [in English].

1 Moscow State Pedagogical University, Kibalchich str. 6, build. 5, Moscow 129164, Russia. E-mail: mpnk@orc.ru

2 Severtsov Institute of Ecology & Evolution, Russian Academy of Sciences, Leninski pr. 33, Moscow 119071, Russia. E-mail: lsdc@mail.ru

KEY WORDS: Collembola, Isotomidae, Isotomurus, new species, Russia.

ABSTRACT. The paper provides a description of Isotomurus chaos sp.n., which, contrary to all known species of the genus excepting I. antennalis Bagnall, 1940, completely lacks trichobotria, the main differentiating character of the genus. Both these species possess a number of other common characters which are unique to the genus but clearly differ in coloration, mucronal seta and more complete setal cover on posterior side of dens in the new species.

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