Dandi, RobertoMuzzi, Caterina2017-04-152017-04-152005978-1-4020-3591-3Genres are considered “as socially recognized types of communicative actions that are habitually enacted by members of a community to realize particular social purposes” (Orlikowski and Yates, 1994, p. 542). This paper studies the evolution of an email-based genre repertoire and examines whether it is related to the degree of complexity associated to different tasks and to the phases of group development. The analysis focuses on the case of an international research team involved in a European project that uses mainly e-mail and other CMC technologies in order to execute different kinds of tasks.enText10.1007/1-4020-3591-8_14