Abstract
Nyctinomops laticaudatus (É. Geoffroy St.-Hilaire, 1805) and Eumops nanus (Miller, 1900) are 2 species with distributions that are expected for Costa Rica. However, voucher specimens that confirm the presence of these species in the country are absent or missing in museum collections. Here we document voucher specimens and present data that confirm the presence of N. laticaudatus and E. nanus in Costa Rica.
Highlights
The Molossidae are a family of medium-sized to large bats with about 16 genera and more than 100 species distributed worldwide (Simmons 2005, Eger 2008)
N. laticaudatus and E. nanus, has been repeatedly included and excluded from the literature of the country using several arguments (Janzen and Wilson 1983, Rodríguez and Chinchilla 1996, Timm and LaVal 1998, Rodríguez-Herrera and Wilson 1999, LaVal and Rodríguez-Herrera 2002, Rodríguez-Herrera et al 2002, 2014); in order to resolve this situation, we present voucher specimens and confirm the presence of N. laticaudatus and E. nanus in Costa Rica
Nyctinomops laticaudatus differs from all other species of the genus potentially distributed in Costa Rica (i.e. N. aurispinosus and N. macrotis) in being overall smaller in several external and cranial measurements (Table 1)
Summary
The Molossidae are a family of medium-sized to large bats with about 16 genera and more than 100 species distributed worldwide (Simmons 2005, Eger 2008). Gregorin and Taddei 2000, Pineda et al 2008, Baker et al 2009, Bianconi et al 2009, Feijó et al 2010, Gregorin et al 2011, Rodríguez-Herrera et al 2014, Medina-Fitoria et al 2015, González-Terrazas et al 2016), there are still many distributional gaps, creating the illusion that some of the species are rare, patchily distributed, or absent in some areas (Reid 2009) This rarity seems to be a direct consequence of the difficulty in capturing these bats with traditional methods, such as placing mist nets at ground level (Reid 2009), and more complex inventory techniques, such as acoustic recordings that are not always available to all tropical bat researchers. Many free-tailed bats possess complex and varied search call designs (Jung et al 2014) that complicate their identification
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