Ametrida centurio Gray

Simmons, Nancy B. & Voss, Robert S., 1998, The mammals of Paracou, French Guiana, a Neotropical lowland rainforest fauna. Part 1, Bats, Bulletin of the American Museum of Natural History 237, pp. 1-219 : 97-98

Ametrida centurio Gray

VOUCHER MATERIAL: 7 females (AMNH *267973, *267274, *267275, *267276, *267278; MNHN *1995.1037, *1995.1038) and 3 males (AMNH *267279, *267976; MNHN *1995.1039); see table 37 for measurements.

IDENTIFICATION: Peterson’s (1965a) revi­

sion remains the principal reference on Ametrida centurio . Measurements for specimens previously collected in the Guianas can also be found in Husson (1962, 1978), Swanepoel and Genoways (1979), and Brosset and Charles­Dominique (1990). No subspecies are currently recognized ( Peterson, 1965a; Jones and Carter, 1976; Koopman, 1994).

Paracou specimens of Ametrida centurio conform in all respects to Peterson’s (1965a) account of this species, with measurements falling within the range of variation previously reported in the literature. In particular, morphometric data from our series (table 37) provide compelling confirmation of the remarkable sexual size dimorphism of A. centurio , in which females are substantially larg­ er than males. Measurements of Paracou males and females are completely nonoverlapping in 11 of 13 dimensions, with slight overlap occurring only in hindfoot length and length of ear.

FIELD OBSERVATIONS: Of the 10 individuals of Ametrida centurio captured at Paracou, 6 were taken in ground­level mistnets and 4 in elevated mistnets. Of the six ground­level captures, two were in swampy primary forest, one was in creekside primary forest, and three were in manmade clearings. Two individuals were captured between 5 and 20 m over a narrow dirt road, and two were captured 34–37 m above a treefall clearing in well­drained primary forest.