Pteronotus suapurensis (J. A. Allen, 1904)
Specimens.—Chontales: Cuapa, 1. Matagalpa: 3 mi E San Ramón, 24. Zelaya: Cara de Mono, 25 m, 4.
This relatively poorly known monotypic species occurs from southern Veracruz to the Amazon Basin. It has been reported from several localities in Central America including one in Nicaragua (Goodwin, 1942a:88). Three pregnant females from near San Ramón (9 May) carried embryos that had crown-rump lengths of 27, 27, and 28 mm, and two netted on 24 April at Cara de Mono each had an embryo that measured 22 mm. All of our specimens are in bright pelage that is fulvous red in color.
Micronycteris megalotis mexicana Miller, 1898
Specimens.—Carazo: 3 km N, 4 km W Diriamba, 600 m, 5. Granada: Hda. Mecatepe [2 km N, 11.5 km E Nandaime], 5. Managua: 5 mi NW Managua, 1. Matagalpa: Río Viejo, 7 mi WNW Darío, 4; 11 mi SE Darío, 1. Zelaya: S end Isla del Maíz Grande, 9.
The individuals from Isla de Maíz Grande were shot on 30 June as they flew from small caves and crevices in rocky outcrops on the south end of the island. Of the three adult females obtained at that time, two were lactating; each was accompanied by a young, the forearms of which measured 19.7 (male) and 21.3 mm (female). Two adult males from Isla del Maíz Grande had testes 2 mm in length.
Table 1.—Selected measurements of adults of two subspecies of Micronycteris megalotis from Nicaragua. Superscript numbers indicate fewer specimens averaged than indicated in left-hand column.
| Number of specimens averaged or catalogue number, and sex | Length of forearm | Greatest length of skull | Zygomatic breadth | Breadth of braincase | Length of maxillary toothrow |
| Micronycteris megalotis mexicana, west-central Nicaragua[a] | |||||
| Average 8 (3 ♂, 5 ♀) | 35.4 | 19.56 | 9.5 | 8.07 | 7.5 |
| Minimum | 33.0 | 18.8 | 9.1 | 7.7 | 7.3 |
| Maximum | 38.1 | 20.3 | 9.8 | 8.2 | 7.7 |
| Isla del Maíz Grande, Nicaragua | |||||
| Average 6 (3 ♂, 3 ♀) | 35.6 | 19.4 | 9.2 | 7.8 | 7.4 |
| Minimum | 34.5 | 19.1 | 9.0 | 7.7 | 7.3 |
| Maximum | 37.0 | 19.8 | 9.3 | 7.9 | 7.5 |
| Micronycteris megalotis microtis, Greytown, Nicaragua (holotype) | |||||
| USNM 16366/23364, ♂ | 31.5 | 18.2 | 8.8 | 7.6 | 6.9 |
| Río Coco, Nicaragua (AMNH) | |||||
| Average 6 (3 ♂, 3 ♀) | 33.6 | 18.93 | — | 7.53 | 7.13 |
| Minimum | 32.7 | 18.8 | — | 7.4 | 7.0 |
| Maximum | 34.2 | 19.0 | — | 7.6 | 7.2 |
| Bonanza, Nicaragua | |||||
| KU 96251, ♂ | 32.3 | 18.4 | 8.8 | 7.6 | 7.0 |
[a]Specimens labeled with reference to Darío, Diriamba, and Managua.
Four of the five specimens taken northwest of Diriamba were shot from a daytime retreat in a culvert; the fifth was caught by hand as it attempted to fly out of a hollow, fallen tree. Two adult females captured on 31 March were pregnant, each carrying a single embryo (13 and 14 mm in crown-rump length), whereas two obtained on 14 August showed no sign of reproductive activity. An adult male, also taken on 14 August, had testes 2 mm in length. Of three additional adult females, one captured on 3 June was pregnant (embryo 21 mm in crown-rump length), whereas two obtained on 14 April evinced no gross reproductive activity.