Sergio Pérez

University of San Carlos of Guatemala · Facultad de Ciencias Químicas y Farmacia

Phyllostomus hastatus es la segunda especie de murciélago de mayor tamaño en el continente americano. Su límite de distribución norte se encuentra entre Belice y Guatemala. En noviembre de 2022, capturamos un individuo con una trampa de arpa en la cueva Senahí, municipio de Lanquín, Alta Verapaz, Guatemala. Determinamos su sexo, edad, condición rep...

Mountains harbor a significant number of the World’s biodiversity, both on tropical and temperate regions. Notably, one crucial gap in conservation is the consideration of historical and contemporary patterns influencing differential distribution in small mammal mountain species and how climate change will affect their distribution and survival. Th...

Two species of Eumops Miller, 1906 are reported with voucher specimens from Guatemala: E. auripendulus (Shaw, 1800) and E. ferox (Gundlach, 1861). Eumops underwoodi Goodwin, 1940 has been known only by recordings. We collected dead specimens of E. ferox and E. underwoodi in a wind farm. Additionally, we provide acoustic data, and an allometric scal...

We found the four species of Nyctinomops Miller, 1902 living in sympatry in central Guatemala. All specimens were found dead under turbines of a wind farm. Nyctinomops femorosaccus (Merriam, 1889), was previously known from northern Mexico and southwestern United States, and this record extends its distribution at least 1150 km southward, represent...

The only known species of the genus Sorex in Honduras is Sorex mccarthyi Matson & Ordóñez-Garza, which is endemic to Celaque National Park. This species shows the presence of a postmandibular foramen and canal, a characteristic that is useful to distinguish between species south of the Isthmus of Tehuantepec and unique to the Sorex salvini species...

La defaunación antropogénica afecta selectivamente y desproporcionalmente a las especies de cuerpo grande. Actualmente se busca comprender las consecuencias de este fenómeno: efecto en el reclutamiento de especies de plantas, funciones cosistémicas y efectos en la diversidad de otros grupos de fauna como los mamíferos medianos y menores. Este estud...

Morphometric and molecular variation among specimens of Peromyscus guatemalensis were grouped into four pooled samples representing separate physiographic regions in Mexico and Guatemala. Mitochondrial sequence data identified three well-supported and reciprocally monophyletic clades. Specimens assigned to P. guatemalensis by current taxonomy also...

A field expedition in 1995 around the community of Bethel, in the shore of the Usumacinta River, Guatemala, produced the collecting of one fluid specimen of shrew that remained unidentified as a voucher at the mammal collection at San Carlos University in Guatemala City. Our target was to identify this specimen and make the morphological comparison...

The northern naked-tailed armadillo, Cabassous centralis (Miller, 1899), has a fragmented distribution that extends from Chiapas, Mexico, to Ecuador. Throughout its range, it is rare to see or capture individuals. Cabassous centralis is reported in only one previous paper for Guatemala; we provide here additional records for the presence of this ar...

Se analizaron los registros de evidencia reproductiva de murciélagos de 13 localidades de Guatemala pertenecientes a 4 biomas: selva tropical lluviosa (SeLl), bosque de montaña (BoMo), chaparral espinoso (ChEs) y sabana tropical húmeda (SaHu). Se presentan datos de la actividad reproductiva de 41 especies de las familias: Phyllostomidae (32), Vesp...

We analyzed the reproductive activity of bats in 13 localities in Guatemala, belonging to four biomas: Selva Tropical Lluviosa (SeLl), Bosque de Montaña (BoMo), Chaparral Espinoso (ChEs) and Sabana Tropical Húmeda (SaHu). We present reproductive evidence of 41 species: Phyllostomidae (32), Vespertilionidae (6) Mormoopidae (2) and Natalidae (1). Out...

General background and coverege of the book: Perspectivas de investigación sobre los mamíferos silvestres de Guatemala (C. Kraker, A. Calderón & A. Cabrera, eds.).

Field expeditions in 2011 that inventoried the terrestrial vertebrate fauna of two wildlife protected areas in the tropical Caribbean of Guatemala have produced the first confirmed records of two bats for the country: the white-bellied big-eared bat, Micronycteris (Schizonycteris) minuta (Gervais 1856) and the Chesnut short-tailed bat Carollia cast...

Mountain-associated species, which exhibit allopatric distributions associated with elevation, endemisms and complex evolutionary histories, pose challenging evolutionary scenarios in which to discern the diversification of species. The Peromyscus mexicanus mice group, distributed along mountains in southern Mexico and Central America, is morphomet...

Small mammal ecology and natural history are poorly known in Nuclear Central America. In an effort to gain information on small mammals (insectivorans, marsupials, and rodents), we sampled three cloud forest habitats in mountain ranges in Honduras (Cerro Celaque and Sierra de Agalta) and Guatemala (Sierra de las Minas). Small mammals were collected...

A partir de la revisión de bases de datos de colecciones zoológicas, literatura especializada y publicaciones científicas, presentamos una lista de murciélagos para Guatemala compuesta por 100 especies. Se incluyen 2 registros nuevos para el país (Micronycteris minuta y Carollia castanea), basados en ejemplares de colección. El incremento del traba...

We analyzed morphometric and molecular variation among 8 populations of Peromyscus zarhynchus grouped into 5 pooled samples representing separate physiographic regions across the range of this species in Chiapas, Mexico, and western Guatemala. Mitochondrial sequence data identify 2 well-supported and reciprocally monophyletic clades, separating all...

During 2003, 2007, 2008 and 2010, bat assemblages were studied at different dry valleys in Guatemala. Ten individuals of Choeronycteris mexicana (7 females and 3 males) were captured almost exclusively during the dry season. Pollen of columnar cacti (Stenocereus pruinosus and Pilosocereus leucocephalus) and Ceiba aesculifolia were found in samples...

The mountain mice of the Peromyscus mexicanus group currently encompass six known species; however, the limits between species remain uncertain, with two considered monotypic and the other four having multiple associated subspecific names. Based on the most comprehensive sampling of the group throughout its distribution in Nuclear Central America,...

Adress to GBIF portal where USAC Mammals Collection is available. Data include around 4,400 of fluid preserved specimens, study skins, skeletons and skulls. The collections is focoused on Guatemalan mammal diversity, specially mice, bats and shrews. An updated versión of the database will be available soon, which will include 7,000 specimens, and a...

A historical review of the first dacade of activities at the guatemalan national program for the conservation of bats

Se estudiaron murciélagos insectívoros en tres cafetales de La Antigua Guatemala, Guatemala. Utilizando el detector AnabatTM II se identificaron dos especies (Eptesicus brasiliensis, de probable distribución en el país, y Lasiurus intermedius) y un género (Myotis spp.) de la familia Vespertilionidae, y dos especies (Cynomopsmexicanus, no registrada...

Field inventories of small mammals have resulted in the collection of five bat species previously unreported for Guatemala: Trinycteris nicefori (Sanborn 1949), Thyroptera tricolor Spix 1823, Eptesicus brasiliensis (Desmarest, 1819), Myotis thysanodes Miller & Allen 1928, and Eumops glaucinus (Wagner 1843). The range of M. thysanodes is extended 33...

We studied bats in shaded coffee plantations and a forest remnant in the mountains around the valley of La Antigua Guatemala. We carried out a mist netting effort of 2880 m2h in each habitat and captured a total of 182 from 12 species. The number of species observed at each habitat was smaller than the non parametric Chao 2 estimator, 89% for the c...

We studied bats in shaded coffee plantations and a forest remnant in the mountains around the valley of La Antigua Guatemala. We carried out a mist netting effort of 2880 m²h in each habitat and captured a total of 182 from 12 species. The number of species observed at each habitat was smaller than the non parametric Chao 2 estimator, 89% for the c...

A rapid biodiversity assessment was carried out in the Sierra Chinajá, Guatemala in order to support the conservation policies of the national agency for protected areas management. This study represents the first systematic account of the flora and fauna of the area. The floristic composition was surveyed using 21 Whitaker plots and non-systematic...

Report and inventory of the two principal academic mammal collections in Guatemala, the public San Carlos University and the private Del Valle University, both in Guatemala City, Guatemala, Central America. They both house an aproximate 5,012 specimens (in 2005), from 148 mammal species, mainly from wildlife protected áreas from Guatemala.

Se presentan los resultados de un inventario de murciélagos en el Parque Nacional Mirador-Rio Azul, extremo nor-oriental de la Reserva de la Biósfera Maya, Guatemala, realizado con tres técnicas: redes de niebla, trampa de arpa y detección ultrasónica ANABAT.

Se presentan los resultados de un inventario de roedores en el Parque Nacional Rio Azul, Petén, Guatemala. Aunque las capturas fueron escazas, un ejemplar de Peromyscus yucatanicus representa el segundo registro para el país.

We report the first record of Yucatan deer mouse, Peromyscus yucatanicus, in Guatemala. The Yucatan deer mouse was restricted to Yucatán Peninsula, where it is considered a common species in deciduous to semi-evergreen tropical forests, and secondary growth forests. Two Yucatan deer mice were collected at Laguna Flor de Luna, Laguna del Tigre Natio...