Reithrodontomys mexicanus (Rodentia: Cricetidae)

2020 ◽  
Vol 52 (996) ◽  
pp. 114-124
Author(s):  
Daily Martínez-Borrego ◽  
Elizabeth Arellano ◽  
Francisco X González-Cózatl ◽  
Duke S Rogers
Keyword(s):  
South America ◽  
Natural Resources ◽  
Population Size ◽  
Distribution Range ◽  
Deciduous Forests ◽  
Oak Forests ◽  
International Union ◽  
Large Size ◽  
Northwestern Region ◽  
Harvest Mouse

Abstract Reithrodontomys mexicanus (Saussure, 1860) is a cricetid rodent commonly called the Mexican harvest mouse and is one of 24 recognized species in the genus. It has grooved upper incisors distinctive of Reithrodontomys, and a medium to relatively large size, with tail longer than head and body; dorsal pelage varies from brown to cinnamon orange. It is distributed from Mexico to Nicaragua and in the northwestern region of South America. It occupies different habitats including humid pine-oak forests, cloud forests, and deciduous forests at elevations from about 1,000 to 3,800 m. R. mexicanus is listed as “Least Concern” by the International Union for Conservation of Nature and Natural Resources, although information about population size throughout its distribution range is unknown.

scholarly journals Dasypus kappleri (Cingulata: Dasypodidae)

2019 ◽  
Vol 51 (977) ◽  
pp. 51-60
Author(s):  
Carlos Aya-Cuero ◽  
Julio Chacón-Pacheco ◽  
Teresa Cristina S Anacleto
Keyword(s):  
South America ◽  
Natural Resources ◽  
Riparian Forest ◽  
Wide Distribution ◽  
International Union ◽  
The Andes ◽  
Wide Range ◽  
Fossorial Species

Abstract Dasypus kappleri Krauss, 1862, commonly known as greater long-nosed armadillo, is the second largest extant armadillo and readily distinguishable by the prominent spurs on the hind legs. It is diurnal-nocturnal, solitary, and insectivorous. It is a semi-fossorial species ranging east of the Andes across the central lowlands of South America. It occupies a wide range of habitats including rainforest, riparian forest, and grassland. D. kappleri is listed as “Least Concern” by the International Union for Conservation of Nature and Natural Resources in light of its wide distribution, which presumedly contains robust populations.

scholarly journals Lichonycteris obscura (Chiroptera: Phyllostomidae)

2020 ◽  
Vol 52 (999) ◽  
pp. 165-172
Author(s):  
Veronica Zamora-Gutierrez ◽  
Jorge Ortega
Keyword(s):  
South America ◽  
Natural Resources ◽  
International Union ◽  
Broad Distribution ◽  
Wing Membrane ◽  
Southern Mexico ◽  
Lack Of Information ◽  
The Pacific ◽  
Lower Incisors

Abstract The dark long-tongued bat (Lichonycteris obscura Thomas, 1895) is a small-sized phyllostomid with a broad distribution from southern Mexico to both, the Pacific and Atlantic lowlands of South America. It is easily distinguished from other Glossophaginae because of its tricolored dorsal pelage with a dark basal band, well-furred elbow, lack of lower incisors, and wing membrane attached to the foot at about mid-length of the metatarsals. L. obscura is a foliage-roosting species, and primarily feeds on nectar and pollen. The species is rare because locally it occurs in low numbers. Despite the lack of information and low abundance, L. obscura is listed as a species of “Least Concern” by the International Union for Conservation of Nature and Natural Resources.

scholarly journals Giant otter Pteronura brasiliensis density and abundance in Llanos Orientales de Colombia in the Orinoco basin

Oryx ◽  
2020 ◽  
pp. 1-4
Author(s):  
Germán Garrote ◽  
Beyker Castañeda ◽  
Jose Manuel Escobar ◽  
Laura Pérez ◽  
Brayan Marín ◽  
...  
Keyword(s):  
South America ◽  
Population Size ◽  
20Th Century ◽  
Conservation Status ◽  
Species Conservation ◽  
Iucn Red List ◽  
Red List ◽  
Recreational Fishing ◽  
Pteronura Brasiliensis ◽  
Direct Counts

Abstract The giant otter Pteronura brasiliensis, categorized as Endangered on the IUCN Red List, was once widely distributed throughout South America. By the middle of the 20th century the giant otter had become locally extinct along the main rivers of the Orinoco basin. Although some populations seem to have recovered, the paucity of information available does not permit a full evaluation of the species' conservation status. The objective of this study was to estimate the abundance and density of the giant otter population along the Orinoco river in the municipality of Puerto Carreño, Vichada, Colombia, where there is important commercial and recreational fishing. Thirty-nine linear km were surveyed, repeatedly, with a total of 315 km of surveys. Population size was estimated by direct counts of individuals. All individuals detected were photographed and identified individually from their throat pelage patterns. In total, 30 otters were identified, giving a minimum density of 0.77 individuals per km, one of the highest reported for the species in Colombia. Given the high density in this well-developed area, our results highlight the importance of this population for the conservation of the species.

The missing Eusarcus: generic relocation of Pucrolia minuta, with synonymic notes (Opiliones: Laniatores: Gonyleptidae)

Zootaxa ◽  
2021 ◽  
Vol 4990 (3) ◽  
pp. 587-590
Author(s):  
LUIS E. ACOSTA ◽  
ELIÁN L. GUERRERO
Keyword(s):  
South America ◽  
20Th Century ◽  
Geographic Area ◽  
Deciduous Forests ◽  
Valid Species ◽  
Southern Brazil ◽  
Brazilian Cerrado ◽  
Systematic Revision ◽  
The Core ◽  
The 19Th Century

The harvestmen family Gonyleptidae (Opiliones), the largest one in the Neotropics (Kury 2003), is astonishingly diverse in eastern South America. The species-rich genus Eusarcus Perty, 1833, is characteristic for this area. It is the second largest gonyleptid genus (Kury 2003; Hara & Pinto-da-Rocha 2010), with a long taxonomical history beginning in the 19th century, when Perty (1833) described the genus together with four species. The number of species increased gradually in the 20th century through the addition of new descriptions and the synonymies of several related genera, with the corresponding species transferals (Hara & Pinto-da-Rocha 2010). Eusarcus is a relatively well-studied taxon that has undergone a thorough systematic revision (Hara & Pinto-da-Rocha 2010). Currently the genus contains 40 valid species, some of them cave-dwellers, with 32 species inhabiting the Atlantic rainforest and Paraná semi-deciduous forests (Saraiva & DaSilva 2016; Santos Júnior et al. 2021). The remaining species are peripheral to the core geographic area and are found in the Brazilian Cerrado, in Paraguay, or in the “Pampas” grasslands of Argentina, Uruguay, and southern Brazil (Hara & Pinto-da-Rocha 2010).  

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