Olrog's four-eyed opossum | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Infraclass: | Marsupialia |
Order: | Didelphimorphia |
Family: | Didelphidae |
Genus: | Philander |
Species: | P. olrogi |
Binomial name | |
Philander olrogi Flores, Barquez & Díaz, 2008 | |
Olrog's four-eyed opossum (Philander olrogi) is a South American species of opossum endemic to eastern Bolivia, [1] first described in 2008 based on specimens collected in 1974. [2] It inhabits the lowland Amazon rainforest, with an elevation range of 150 to 250 m. [1] The species is named after Swedish-Argentine biologist Claes C. Olrog. [2] [3] [4] It is sympatric with P. opossum , which it resembles. [2] The two species differ in several ways, such as ventral fur color and condition of the zygomatic arch. [5]
Opossums are members of the marsupial order Didelphimorphia endemic to the Americas. The largest order of marsupials in the Western Hemisphere, it comprises 126 species in 18 genera. Opossums originated in South America and entered North America in the Great American Interchange following the connection of North and South America.
The gray four-eyed opossum is an opossum species from Central and South America, ranging from southern Mexico to Peru, Bolivia and southwestern Brazil, at altitudes from sea level to 1600 m, but generally below 1,000 metres (3,300 ft). Its habitats include primary, secondary and disturbed forest. It is one of many opossum species in the order Didelphimorphia and the family Didelphidae.
The bare-tailed woolly opossum is an opossum from South America. It was first described by Swedish zoologist Carl Linnaeus in 1758. The bare-tailed woolly opossum is characterized by a gray head, brown to gray coat, orange to gray underside and a partially naked tail. It is nocturnal and solitary; there is hardly any social interaction except between mother and juveniles and in mating pairs. The opossum constructs nests in tree cavities, and its litter size ranges from one to seven. Gestation lasts 25 days, and the juveniles exit the pouch after three months; weaning occurs a month later. The bare-tailed woolly opossum inhabits subtropical forests, rainforests, secondary forests, and plantations; its range extends from northern Venezuela to northeastern and southcentral Brazil. The IUCN classifies this opossum as least concern.
McIlhenny's four-eyed opossum is a South American species of opossum. Found in Brazil and Peru, it is almost entirely black, except for white spots above each eye.
The southeastern four-eyed opossum is an opossum species native to South America. It is found in Atlantic Forest ecoregions, in Brazil, Paraguay and Argentina.
Anderson's four-eyed opossum is an opossum species from South America. It is found in Brazil, Colombia, Ecuador, Peru and Venezuela. Its dorsal fur is dark, with a black stripe, about 3–4 cm wide, going vertically down the midline of its back. Its dorsal fur is short, about 10 mm long. Its ventral fur is dark gray, but still distinctly lighter than the sides and dorsum. Its tail is furred for the first (approximately) 18% of its length, going from the base to the tip. Its species name "andersoni" was chosen to honor American scientific collector Malcolm Playfair Anderson.
The nine species in the genus Philander, commonly known as gray and black four-eyed opossums, are members of the order Didelphimorphia. Mature females have a well-developed marsupium. The tail appears to be hairless except for the proximal 5 or 6 cm, which has a few long hairs. The tail is slightly longer than the head-and-body length, and it is black for the proximal one half to two thirds of its length. The genus is closely related to Didelphis but the species of Philander are smaller than those of Didelphis. The genus formerly included Metachirus nudicaudatus, but this species lacks a pouch and so is now considered a separate genus. The common name comes from the white spots above the eyes, which can appear from a distance to be another set of eyes.
The dwarf fat-tailed mouse opossum, also known as the velvety fat-tailed opossum is an opossum species from South America. It is endemic to Brazil, where it is found in cerrado and caatinga habitats. Its head-and-body length is about 141-212 mm, and its tail length is about 73-85 mm. Its diet is 44% arthropods; 75% of its diet consists of animals and animal products. Its ventral fur is entirely gray-based. Its hind foot is less than 14 mm, which is short for the genus.
Olrog's chaco mouse is a species of South American rodent in the family Cricetidae, endemic to Argentina. The natural habitat of the species is hot deserts. Its karyotype has 2n = 60. The species is named after Swedish-Argentine biologist Claes C. Olrog.
Olrog's gull is a species of gull found along the Atlantic coast of southern Brazil, Uruguay, and northern Argentina. It was formerly considered a subspecies of the very similar L. belcheri. It is a large gull with a black back and wings, white head and underparts, a black band in the otherwise white tail, and a yellow bill with a red and black tip. Nonbreeding adults have a blackish head and a white eye ring. The species is named after Swedish-Argentine biologist Claes C. Olrog. It has a rather restricted breeding range and is threatened by habitat loss, and the IUCN has rated it as being "near threatened".
Olrog's cinclodes is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is endemic to Argentina.
Thylamys is a genus of opossums in the family Didelphidae. The premaxillae are rounded rather than pointed. The females lack a pouch. The females' nipples are arranged in two symmetrical rows on the abdomen. All species but T. macrurus store fat in their tails., although this is not necessarily true for all species in the genus. Fossils belonging to the genus date back to the Miocene, with the oldest specimens being found in the Cerro Azul Formation of Argentina and the Honda Group of Colombia. Genetic studies indicate that the genus may have originated around 14 million years ago.
Roig's pericote or Roig's chaco mouse is a species of rodent in the family Cricetidae. Its karyotype has 2n = 60 and FN = 120. It may be a subspecies of Olrog's chaco mouse.
The Cinderella fat-tailed mouse opossum is a species of opossum in the family Didelphidae. It is found in northern Argentina and southern Bolivia, in the eastern foothills of the Andes. Its dorsal fur is gray brown to dark brown. Its ventral fur is gray-based, except for the white to yellowish chest hairs. It has been distinguished from T. sponsorius by the well-developed postorbital ridges of the latter, but mitochondrial DNA sequence analysis does not support separate species status for sponsorius.
The Argentine fat-tailed mouse opossum was formerly considered a species of opossum in the family Didelphidae. It is found in the eastern foothills of the Andes in northern Argentina and southern Bolivia. Typically reach around 10-13 cm in body length, with a bushy tail adding another 12-15 cm. Its dorsal fur is gray brown to dark brown. Its ventral fur is gray-based except for the white to yellowish chest hairs. It has been distinguished from T. cinderella by its postorbital ridges. T. cinderella has well-developed postorbital ridges in both juveniles and adults that extend laterally behind the eye sockets. Only adults of T. sponsorius have fully developed postorbital ridges, and these do not extend laterally behind the eye sockets. While the American Society of Mammalogists maintains this as a distinct species, mitochondrial DNA sequence analysis does not support the population being distinct from T. cinderella.
The deltaic four-eyed opossum or delta opossum is a species of opossum found in the Orinoco River delta region of Venezuela, South America, first described in 2006. It inhabits perennially flooded swamp forest or seasonally flooded marsh forest of the adjacent deltas of the Orinoco and nearby rivers. Its dorsal fur is gray. Its ventral fur is cream-colored, but is restricted by the hairs on the sides, which are gray at the base. Its ears are colored only along the margins. The spots above its eyes are small. The spots behind its ears are small and inconspicuous.
Tate's woolly mouse opossum is an omnivorous, arboreal South American marsupial of the family Didelphidae, named after American zoologist George Henry Hamilton Tate. It is native to Atlantic coastal forests of Brazil, Paraguay and Argentina. The species lives in both primary and secondary forest, including forest fragments within grassland. Insects are a major component of its diet. It was formerly assigned to the genus Micoureus, which was made a subgenus of Marmosa in 2009. While its conservation status is "least concern", its habitat is shrinking through urbanization and conversion to agriculture over much of its range.
Mondolfi's four-eyed opossum is a South American species of opossum found in Colombia and Venezuela, first described in 2006. It inhabits foothills of the Cordillera de Mérida and those on the eastern side of the Cordillera Oriental at elevations from 50 to 800 m. Populations in the two ranges may represent distinct subspecies. It is named after the Venezuelan biologist Edgardo Mondolfi. It has short woolly fur with a pale cream-colored venter as well as large ears pigmented on only the distal half.
Claës Christian Olrog was a Swedish-born ornithologist who worked in Argentina. He published Las Aves Argentinas (1959) which was one of the first field guides for Argentina.