Descripción de un nuevo género de quiróptero neotropical de la familia Molossidae

Abstract

Se describe un nuevo género de quiróptero de la familia Molossidae del Nuevo Mundo, al que se denomina Cabreramops y cuya especie tipo es Molossops aequatorianus Cabrera. Los caracteres principales de este nuevo género son: La presencia de dos pares de incisivos inferiores y uno de premolares superiores. Incisivos superiores que no se proyectan hacia adelante. Parte anterior del paladar completa sin emarginación. Orejas casi unidas sobre la frente.

A new genus of Chiroptera of the Molossidae family of the New World is described, giving if the name Cabreramops. The type species is Molossops aequatorianus Cabrera, 1917. Since the time of the description of this species, made on the basis of four specimens, no new material has been reported. Only the skin of the type and the skull and skin of a paratype are actually known to exist and both are deposited in the Museo Nacional de Ciencias Naturales of Madrid. The features diagnostic of this new genus are the following: Anterior bases of ears near together on forehead. Upper lip wrinkled though more weekly than in Tadarida. No keel-like ridge from behind muzzle to origin of ears. Second phalanx of digit IV slightly shorter than the first. Dental formula i (1-1)/(2-2), c (1-1)/(1-1), pm (1-1)/(2-2), m (3-3)/(3-3). Converging upper incisors widely separated at base and in contacy in the distal half, scarcely proyected ahead of the canine (very similar in form and proportions to Molossus and Cheiromeles). Lower premolars nearly equal; the anterior, slightly smaller, is not being compressed between the canine and posterior premolar. Upper molars essentially normal, the two first ones with hipocone though not very large, the third reduced, missing the third commisure.Saginal crest absent, lachrimal ridge poorly developed. Anterior portion of palate entire without emargination. Basisphenoid pits oval well developed. Cabreramops is also compared here with other molossid genera, giving the main differential characteristics among them.