Communities of both transient and resident organisms, interacting in different ways, occur inside tanks (rosettes) of bromeliads. Abundance and composition of the communities differ seasonally. The objectives of this work were to make an initial exploration of the arthropod fauna associated with Tillandsia deppeana in order to obtain a preliminary species list, and to document the abundance of organisms occurring in the rosettes. The arthropods were collected from four plants in a fragmented mountain cloud forest in La Misión municipality, in the north of Hidalgo State, México. A total of 375 arthropod specimens (249 adults and 126 juveniles) belonging to Arachnida, Chilopoda and Hexapoda were obtained and they represent 10 orders, 15 families, and adults and juveniles correspond to 23 and 15 morphospecies respectively. Veliidae (Hemiptera) had the highest number of organisms, while Staphylinidae (Coleoptera) had the highest number of morphospecies. The dryophthorid Metamasius callizona and the staphylinids Hesperus fasciatus and Scaphidium tzinti are reported for the first time from Hidalgo State. In this work we report for the first time the chilopod Scolopendra viridis occurring in an epiphytic bromeliad tank.