Silky anteater [1] | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Pilosa |
Family: | Cyclopedidae |
Genus: | Cyclopes J. E. Gray, 1821 |
Species: | C. didactylus |
Binomial name | |
Cyclopes didactylus | |
Silky anteater range | |
Synonyms | |
Myrmecophaga didactylaLinnaeus, 1758 |
The silky anteater, also known as the pygmy anteater, has traditionally been considered a single species of anteater, Cyclopes didactylus, in the genus Cyclopes, the only living genus in the family Cyclopedidae. Found in southern Mexico, and Central and South America, it is the smallest of all known anteaters. It has nocturnal habits and appears to be completely arboreal; its hind feet are highly modified for climbing.
A taxonomic review in 2017, including both molecular and morphological evidence, found that Cyclopes may actually comprise at least seven species. [4] The only known extinct cyclopedid species is Palaeomyrmidon incomtus , from the Late Miocene (c. 7 to 9 million years ago) of modern-day Argentina. [5] [6]
The scientific name Cyclopes didactylus translates to "two-toed circle-foot", referencing the two claws present on the forefeet. Additionally, the name alludes to the toes' ability to nearly encircle a branch while clinging. [7] [6]
Silky anteaters are the smallest extant anteaters and have proportionately shorter faces and larger crania than other species. Average adult length ranges from 36 to 45 cm (14 to 18 in), including a tail 17 to 24 cm (6.7 to 9.4 in) long, and weigh from 175 to 400 g (6.2 to 14.1 oz). They have dense and soft fur, ranging from grey to yellowish in color, with a silvery sheen. Many subspecies have dark, often brownish, streaks and relatively paler underparts or limbs. Their eyes are black, while the foot soles are red. [6]
The silky anteater possesses claws on the second and third toes of its forefeet, with the third toe being significantly larger. The fourth toe is small and clawless, while the remaining toes are vestigial or absent and not externally visible. On the hind feet, all four toes are of equal length and equipped with long claws, accompanied by a vestigial hallux that is not externally visible. The ribs are broad and flat, overlapping to form an internal armored casing that protects the chest. [6]
The species also features partially prehensile tails, which further aid in their arboreal lifestyle. [6]
Silky anteaters are found from Oaxaca and southern Veracruz in Mexico, through Central America (except El Salvador), and south to Ecuador, and northern Peru, Bolivia, and Brazil. A distinct population is found in the northern Atlantic Forest of eastern Brazil. Silky anteaters are also found on the island of Trinidad. They inhabit a range of different forest types, including semi-deciduous, tropical evergreen, and mangrove forests, from sea level to 1,500 m (4,900 ft). [2]
Silky anteaters form the sister clade to the myrmecophagid anteaters, together forming Vermilingua. Vermilingua is a sister clade to sloths (Folivora), together forming Pilosa.
Until a detailed taxonomic review in 2017, seven subspecies of C. didactylus were recognized. [6]
Cladogram of living Cyclopes [8] [4] |
The 2017 review suggests that four of these subspecies deserve to be recognized as species, while the others are synonyms. It also described three new species of silky anteater. [4]
Silky anteaters are nocturnal and arboreal, [6] found in lowland rainforests with continuous canopy, where they can move to different places without the need to descend from trees. [9] They can occur at fairly high densities of 0.77 individuals/ha, for example, in some areas.[ clarification needed ] Females have smaller home ranges than males.
The silky anteater is a slow-moving animal and feeds mainly on ants, eating between 700 and 5,000 a day. [10] Silky anteaters also feed on wasps and wasp pupae, attacking the wasp nests at night when the wasps are sluggish and unable to defend themselves. [11] Sometimes, it also feeds on other insects, such as termites and small coccinellid beetles. [9] It has been observed to consume fruits while in captivity. [12] The silky anteater defecates once a day. Some of those faeces contain a large quantity of exoskeleton fragments of insects, indicating the silky anteater does not possess either chitinase or chitobiase, [9] digestive enzymes found in insectivorous bats.
It is a solitary animal and gives birth to a single young, up to twice a year. The young are born already furred, and with a similar colour pattern to the adults. They begin to take solid food when they are about one-third of the adult mass. [6] The young is usually placed inside a nest of dead leaves built in tree holes, [9] and left for about eight hours each night. [6]
Some authors suggest the silky anteater usually dwells in silk cotton trees (genus Ceiba ). [13] Because of its resemblance to the seed pod fibers of these trees, it can use the trees as camouflage [9] and avoid attacks of predators such as hawks and, especially, harpy eagles. During the day, they typically sleep curled up in a ball. [14] Although they are rarely seen in the forest, they can be found more easily when they are foraging on lianas at night.
When threatened, the silky anteater, like other anteaters, defends itself by standing on its hind legs and holding its fore feet close to its face so it can strike any animal that tries to get close with its sharp claws. [6]
The silky anteater is a host of the acanthocephalan intestinal parasite Gigantorhynchus echinodiscus . [15]
The giant anteater is an insectivorous mammal native to Central and South America. It is one of four living species of anteaters, of which it is the largest member. The only extant member of the genus Myrmecophaga, it is classified with sloths in the order Pilosa. This species is mostly terrestrial, in contrast to other living anteaters and sloths, which are arboreal or semiarboreal. The giant anteater is 182 to 217 cm in length, with weights of 33 to 50 kg for males and 27 to 47 kg for females. It is recognizable by its elongated snout, bushy tail, long fore claws, and distinctively colored pelage.
The southern tamandua, also called the collared anteater or lesser anteater, is a species of anteater from South America and the island of Trinidad in the Caribbean. It is a solitary animal found in many habitats, from mature to highly disturbed secondary forests and arid savannas. It feeds on ants, termites, and bees. Its very strong foreclaws can be used to break insect nests or to defend itself.
The Hoffmann's two-toed sloth, also known as the northern two-toed sloth, is a species of sloth from Central and South America. It is a solitary, largely nocturnal and arboreal animal, found in mature and secondary rainforests and deciduous forests. The common name commemorates the German naturalist Karl Hoffmann, who discovered the Hoffmann sloth.
Linnaeus's two-toed sloth, also known as the southern two-toed sloth, unau, or Linne's two-toed sloth is a species of sloth from South America, found in Venezuela, Suriname, Guyana, French Guiana, Colombia, Ecuador, Peru, and Brazil north of the Amazon River. There is now evidence suggesting the species' range expands into Bolivia. It's the largest extant sloth species.
The brown four-eyed opossum is a pouchless marsupial of the family Didelphidae. It is found in different forested habitats of Central and South America, from Nicaragua to Brazil and northern Argentina, including southeastern Colombia, Paraguay and eastern Peru and Bolivia, at elevations from sea level to 1,500 m (4,900 ft). It is the only recognized species in the genus Metachirus, but molecular phylogenetics studies suggest that it should probably be split into several species. Population densities are usually low, and it is uncommon in parts of Central America. A density of 25.6/km2 (66/sq mi) was reported near Manaus, Brazil. Its karyotype has 2n = 14 and FN = 24.
The order Pilosa is a clade of xenarthran placental mammals, native to the Americas. It includes anteaters and sloths. The name comes from the Latin word for "hairy".
Choloepus is a genus of xenarthran mammals from Central and South America within the monotypic family Choloepodidae, consisting of two-toed sloths, sometimes also called two-fingered sloths. The two species of Choloepus, Linnaeus's two-toed sloth and Hoffmann's two-toed sloth, were formerly believed on the basis of morphological studies to be the only surviving members of the sloth family Megalonychidae, but have now been shown by molecular results to be closest to extinct ground sloths of the family Mylodontidae.
Sloths are a Neotropical group of xenarthran mammals constituting the suborder Folivora, including the extant arboreal tree sloths and extinct terrestrial ground sloths. Noted for their slowness of movement, tree sloths spend most of their lives hanging upside down in the trees of the tropical rainforests of South America and Central America. Sloths are considered to be most closely related to anteaters, together making up the xenarthran order Pilosa.
The Myrmecophagidae are a family of anteaters, the name being derived from the Ancient Greek words for 'ant' and 'eat'. Two genera and three species are in the family, consisting of the giant anteater, and the tamanduas. The fossil Eurotamandua from the Messel Pit in Germany may be an early anteater, but its status is currently debated.
The northern tamandua is a species of tamandua, an anteater in the family Myrmecophagidae. They live in tropical and subtropical forests from southern Mexico, through Central America, and to the edge of the northern Andes.
Anteaters are the four extant mammal species in the suborder Vermilingua, commonly known for eating ants and termites. The individual species have other names in English and other languages. Together with sloths, they are within the order Pilosa. The name "anteater" is also commonly applied to the aardvark, numbat, echidnas, and pangolins, although they are not closely related to them.
Gigantorhynchus is a genus of Acanthocephala that parasitize marsupials, anteaters, and possibly baboons by attaching themselves to the intestines using their hook-covered proboscis. Their life cycle includes an egg stage found in host feces, a cystacanth (larval) stage in an intermediate host such as termites, and an adult stage where cystacanths mature in the intestines of the host. This genus is characterized by a cylindrical proboscis with a crown of robust hooks at the apex followed by numerous small hooks on the rest of the proboscis, a long body with pseudosegmentation, filiform lemnisci, and ellipsoid testes. The largest known specimen is the female G. ortizi with a length of around 240 millimetres (9.4 in) and a width of 2 millimetres (0.08 in). Genetic analysis on one species of Gigantorhynchus places it with the related genus Mediorhynchus in the family Gigantorhynchidae. Six species in this genus are distributed across Central and South America and possibly Zimbabwe. Infestation by a Gigantorhynchus species may cause partial obstructions of the intestines, severe lesions of the intestinal wall, and may lead to death.
The mammalian order Pilosa, which includes the sloths and anteaters, includes various species from the Caribbean region. Many species of sloths are known from the Greater Antilles, all of which became extinct over the last millennia, but some sloths and anteaters survive on islands closer to the mainland.
The Solimões-Japurá moist forests (NT0163) is an ecoregion in northwest Brazil and eastern Peru and Colombia in the Amazon biome. It has a hot climate with high rainfall throughout the year, and holds one of the most diverse collections of fauna and flora in the world. The ecoregion is relatively intact.