International Journal of Zoological Research1811-97781811-9786Academic Journals Inc.10.3923/ijzr.2007.223.226Musonycteris harrisoni and Tlacuatzin canescens Pollinating a Columnar Cactus in West-Central Mexico]]>CerdenaCarlos N. Ibarra-CorderoVictor Sanchez-LopezPilar Ibarra-DavalosLuis I. Iniguez-4200734We report Musonycteris harrisoni (Phyllostomidae) and Tlacuatzin canescens (Didelphidae) feeding of flowers during the blooming period (March and April 2004) of Stenocereus queretaroensis, an endemic cactus showing nocturnal anthesis and chiropterophilic syndrome. Visits were considered legitimate because both mammals made contact with the stigma and anthers, although their visits were highly infrequent compared with the principal pollinator Leptonycteris curasoae. These mammals are usually associated with pristine tropical forests, although our study site showed high habitat fragmentation and extensive agriculture. It is likely that both mammals feed regularly on nectar of cacti in pristine tropical forests thus acting actively as pollinators.]]>Bawa, K.S.,199021399422Bestmann, H., L. Winkler and O. Von Helversen,19974611691172Carthew, S.M. and R.L. Goldingay,199712104108Ceballos, G. and A. Miranda,20002000Dawson, T.J. and A.J. Hulbert,197021812331238Faegri, K. and L. van Deer Pijl,1979Gribel, R.,1988Caluromys lanatus (Didelphidae) to flowers of Pseudobombax tomentuosum (Bombacaceae): A probable case of pollination by marsupials in central Brazil.]]>20344347Horner, M.A., T.H. Fleming and C.T. Sahley,1998Leptonycteris curasoae (Chiroptera: Phyllostomidae).]]>244575586Ibarra-Cerdena, C.N., L.I. Iniguez-Davalos and V. Sanchez-Cordero,2005Stenocereus queretaroensis (Cactaceae), a chiropterophilous columnar cactus, in a tropical dry forest of Mexico.]]>92503509Janson, C.H., J. Terborgh and L.H. Emmons,19811316Koopman, K.F.,19761976pp: 1-218pp: 1-218Quesada, M., K.E. Stoner, V. Rosas-Guerrero, C. Palacios-Guevara and J.A. Lobo,2003Ceiba grandiflora.]]>135400406Ramirez-Pulido, J., J. Arroyo-Cabrales and A. Castro-Campillo,2005212182Stanton, M.L., A.A. Snow and S.N. Handel,198623216251627Steiner, K.E.,198168505513Stoner, K.E., M. Quesada, V. Rosas-Guerrero and J.A. Lobo,2002Musonycteris harrisoni) foraging in the tropical dry forest of Jalisco, Mexico.]]>34462467