Short-eared dog

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Short-eared dog [1]
Atelocynus microtis en Amazonie peruvienne.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Canidae
Subfamily: Caninae
Tribe: Canini
Genus: Atelocynus
Cabrera, 1940
Species:
A. microtis
Binomial name
Atelocynus microtis
(Sclater, 1883)
Subspecies
Distribucion Atelocynus microtis.png
Short-eared dog range

The short-eared dog (Atelocynus microtis), also known as the short-eared zorro or small-eared dog, [2] [3] is a unique and elusive canid species endemic to the Amazonian basin. [1] [2] This is the only species assigned to the genus Atelocynus. [1]

Other names

The short-eared dog has many names in the local languages where it is endemic, including cachorro-do-mato-de-orelha-curta in Portuguese, zorro de oreja corta ("short-ear fox") in Spanish, nomensarixi in Chiquitano, uálaca in Yucuna, cuachi yaguar in Guarayu, quinamco in Mooré, and achuj in Ninam and Mosetén. [4]

Other common names in Spanish include zorro ojizarco ("blue-eyed fox"), zorro sabanero ("savannah fox"), and zorro negro ("black fox").

Evolution and systematics

After the formation of the Isthmus of Panama in the latter part the Tertiary (about 2.5 million years ago in the Pliocene), canids migrated from North America to the southern continent as part of the Great American Interchange. The short-eared dog's ancestors adapted to life in tropical rainforests, developing the requisite morphological and anatomical features. Apart from its superficial resemblance to the bush dog, the short-eared dog seems not to be closely related to any fox-like or wolf-like canid. [5] It is one of the most unusual canids. [4]

Two subspecies of this canid are recognized, [1] A. m. microtis and A. m. sclateri

Occurrence and environment

In the Amazon rainforest Atelocynus microtis en amazonie peruvienne.jpg
In the Amazon rainforest

The short-eared dog can be found in the Amazon rainforest region of South America (in Brazil, Bolivia, Peru, Colombia, Ecuador and possibly Venezuela). [1] There is a single report of "three slender, doglike animals" of this species sighted in the Darien region of Panama in 1984 by German biologist Sigi Weisel and a native Embera-nation Panamanian; this rare species' presence in Panama is possible because of "the continuous mass of forest habitat that covers this region". [3] It lives in various parts of the rainforest environment, preferring areas with little human disturbance. It lives in both lowland forests known as Floresta Amazônica and terra firme forest, as well as in swamp forest, stands of bamboo, and cloud forest. [6] It is a solitary animal and prefers moving in trees away from human and other animal interactions. [7]

Appearance

Short-eared dog fur skin (Atelocynus microtis), fur skin collection, Bundes-Pelzfachschule, Frankfurt/Main, Germany Atelocynus mecrotis (Small eared fox) fur skin.jpg
Short-eared dog fur skin (Atelocynus microtis), fur skin collection, Bundes-Pelzfachschule, Frankfurt/Main, Germany
Short-eared dog skull Shortdogskull.jpg
Short-eared dog skull

The short-eared dog has short and slender limbs with short and rounded ears. It has a distinctive fox-like muzzle and bushy tail. Its paws are partly webbed, helping adapt it to its partly aquatic habitat. [8]

Its fur ranges from dark to reddish-grey, but can also be nearly navy blue, coffee brown, dark grey, or chestnut-grey to black, and the coat is short, with thick and bristly fur. [4] It has a somewhat narrow chest, with dark color variation on the thorax merging to brighter, more reddish tones on the abdominal side of the body.

Diet

This wild dog is mainly a carnivore, with fish, insects, and small mammals making up the majority of its diet. An investigation led in the Cocha Cashu Biological Station in Peru into the proportions of different kinds of food in this animal's diet produced the following results: fish (28%), insects (17%), small mammals (13%), various fruits (10%), birds (10%), crabs (10%), frogs (4%), and reptiles (3%).

Reproduction and behavior

This species has some unique behaviors not typical to other canids. Females of this species are about one-third larger than males. The excited male sprays a musk produced by the tail glands. It prefers a solitary lifestyle, in forest areas. It avoids humans in its natural environment. Agitated males raise the hairs on their backs. [9]

The lifespan and gestation period of the short-eared dog are unknown, although sexual maturity is reached at three years of age, relatively late compared to other canid species. [10]

Threats, survival, and ecological concerns

Feral dogs pose a prominent threat to the population of short-eared dogs, as they facilitate the spread of diseases such as canine distemper and rabies to the wild population. The short eared dog suffers greatly from loss of habitat. There is a significant amount of disturbance in formerly remote South American forests, and almost no habitat except where human settlers and prospectors pass daily destroy or expose their dens. Humans also contribute to their extermination by degradation of the species' natural habitat and the general destruction of tropical rainforests.

Manu National Park, Madre de Dios, Peru Manu riverbank.jpg
Manú National Park, Madre de Dios, Peru

Status of conservation

The short-eared dog is currently considered near threatened by the IUCN. [2] No comprehensive ecological and genetic research has been carried out on the species.


Related Research Articles

<span class="mw-page-title-main">Canidae</span> Family of mammals

Canidae is a biological family of dog-like carnivorans, colloquially referred to as dogs, and constitutes a clade. A member of this family is also called a canid. The family includes three subfamilies: the Caninae, the extinct Borophaginae and Hesperocyoninae. The Caninae are known as canines, and include domestic dogs, wolves, coyotes, foxes, jackals and other species.

<span class="mw-page-title-main">Fox</span> Genera of mammal

Foxes are small- to medium-sized omnivorous mammals belonging to several genera of the family Canidae. They have a flattened skull; upright, triangular ears; a pointed, slightly upturned snout; and a long, bushy tail ("brush").

<span class="mw-page-title-main">Wolf</span> Type of canine

The wolf, also known as the gray wolf or grey wolf, is a large canine native to Eurasia and North America. More than thirty subspecies of Canis lupus have been recognized, including the dog and dingo, though gray wolves, as popularly understood, only comprise naturally-occurring wild subspecies. The wolf is the largest extant member of the family Canidae, and is further distinguished from other Canis species by its less pointed ears and muzzle, as well as a shorter torso and a longer tail. The wolf is nonetheless related closely enough to smaller Canis species, such as the coyote and the golden jackal, to produce fertile hybrids with them. The wolf's fur is usually mottled white, brown, gray, and black, although subspecies in the arctic region may be nearly all white.

<span class="mw-page-title-main">Culpeo</span> Species of carnivore

The culpeo also known as theculpeo dog, Andean dog, Andean fox, Paramo wolf, Andean wolf, and colpeo fox, is a species of South American fox. Despite the name, it is not a true fox, but more closely related to wolves and jackals. Its appearance resembles that of foxes due to convergent evolution.

<span class="mw-page-title-main">Maned wolf</span> Species of carnivore

The maned wolf is a large canine of South America. It is found in Argentina, Brazil, Bolivia, Peru, and Paraguay, and is almost extinct in Uruguay. Its markings resemble those of foxes, but it is neither a fox nor a wolf. It is the only species in the genus Chrysocyon.

<span class="mw-page-title-main">Bat-eared fox</span> Species of carnivorans

The bat-eared fox is a species of fox found on the African savanna. It is the only extant species of the genus Otocyon and considered a basal canid species. Fossil records indicate this canid first appeared during the middle Pleistocene.

<span class="mw-page-title-main">Bush dog</span> Species of carnivore

The bush dog is a canine found in Central and South America. In spite of its extensive range, it is very rare in most areas except in Suriname, Guyana and Peru; it was first described by Peter Wilhelm Lund from fossils in Brazilian caves and was believed to be extinct.

<span class="mw-page-title-main">South American fox</span> Genus of carnivores

The South American foxes (Lycalopex), commonly called raposa in Portuguese, or zorro in Spanish, are a genus from South America of the subfamily Caninae. Despite their name, they are not true foxes, but are a unique canid genus more closely related to wolves and jackals than to true foxes; some of them resemble foxes due to convergent evolution. The South American gray fox, Lycalopex griseus, is the most common species, and is known for its large ears and a highly marketable, russet-fringed pelt.

<span class="mw-page-title-main">Gray fox</span> Species of canid (Urocyon cinereoargenteus)

The gray fox, or grey fox, is an omnivorous mammal of the family Canidae, widespread throughout North America and Central America. This species and its only congener, the diminutive island fox of the California Channel Islands, are the only living members of the genus Urocyon, which is considered to be genetically basal to all other living canids. Its species name cinereoargenteus means "ashen silver".

<span class="mw-page-title-main">Caniformia</span> Suborder of mammals

Caniformia is a suborder within the order Carnivora consisting of "dog-like" carnivorans. They include dogs, bears, raccoons, and mustelids. The Pinnipedia are also assigned to this group. The center of diversification for the Caniformia is North America and northern Eurasia. Caniformia stands in contrast to the other suborder of Carnivora, the Feliformia, the center of diversification of which was in Africa and southern Asia.

<span class="mw-page-title-main">Ethiopian wolf</span> Canine native to Ethiopian Highlands

The Ethiopian wolf, also called the red jackal, the Simien jackal or Simien fox, is a canine native to the Ethiopian Highlands. In southeastern Ethiopia, it is also known as the horse jackal. It is similar to the coyote in size and build, and is distinguished by its long and narrow skull, and its red and white fur. Unlike most large canids, which are widespread, generalist feeders, the Ethiopian wolf is a highly specialised feeder of Afroalpine rodents with very specific habitat requirements. It is one of the world's rarest canids, and Africa's most endangered carnivore.

<span class="mw-page-title-main">Giant armadillo</span> Species of mammals belonging to the armadillo order of xenarthrans

The giant armadillo, colloquially tatu-canastra, tatou, ocarro or tatú carreta, is the largest living species of armadillo. It lives in South America, ranging throughout as far south as northern Argentina. This species is considered vulnerable to extinction.

<span class="mw-page-title-main">Crab-eating fox</span> Species of carnivore

The crab-eating fox, also known as the forest fox, wood fox, bushdog or maikong, is an extant species of medium-sized canid endemic to the central part of South America since at least the Pleistocene epoch. Like South American foxes, which are in the genus Lycalopex, it is not closely related to true foxes. Cerdocyon comes from the Greek words kerdo and kyon (dog) referring to the dog- and fox-like characteristics of this animal.

<span class="mw-page-title-main">Darwin's fox</span> Species of canid

Darwin's fox or Darwin's zorro is an endangered canid from the genus Lycalopex. It is also known as the zorro chilote or zorro de Darwin in Spanish and lives on Nahuelbuta National Park, the Cordillera de Oncol, Cordillera Pelada in mainland Chile and Chiloé Island. This small, dark canine weighs 1.8 to 3.95 kg, has a head-and-body length of 48 to 59 cm and a tail that is 17.5 to 25.5 cm. Darwin's fox displays no key differences between male and female other than the fact that the male has a broader muzzle. Males display no territorial behavior and are not aggressive towards other males roaming around their territory.

<span class="mw-page-title-main">Pampas fox</span> Species of carnivore

The Pampas fox, also known as grey pampean fox, Pampas zorro, Azara's fox, or Azara's zorro, is a medium-sized zorro, or "false" fox, native to the South American Pampas. Azara in some of its alternative common names is a reference to Spanish naturalist Félix de Azara.

Canid hybrids are the result of interbreeding between the species of the subfamily Caninae.

<span class="mw-page-title-main">Hairy-eared dwarf lemur</span> Species of lemur

The hairy-eared dwarf lemur, or hairy-eared mouse lemur, is one of the most scarcely known lemurs. A. trichotis is a nocturnal lemur that is endemic to Madagascar. It was originally named by Albert Günther in 1875 as Cheirogaleus trichotis as part of the Cheirogaleidae family, or the dwarf lemurs. In 1967 Petter-Rousseaux and Petter reassigned the lemur to its own genus and is the now only member of the genus Allocebus. The hairy-eared dwarf lemur was thought to be extinct until its rediscovery in 1989 in a northeastern primary lowland rainforest. The population of these mammals is shown to be severely decreasing and largely fragmented throughout Northern and Eastern Madagascar rainforests; most likely due to hunting, trapping, slash-and-burn agriculture as well as habitat fragmentation.

<span class="mw-page-title-main">South American gray fox</span> Species of carnivore

The South American gray fox, also known as the Patagonian fox, the chilla or the gray zorro, is a species of Lycalopex, the "false" foxes. It is endemic to the southern part of South America.

<span class="mw-page-title-main">African wild dog</span> Endangered species of canine native to Africa

The African wild dog, also known as the painted dog or Cape hunting dog, is a wild canine native to sub-Saharan Africa. It is the largest wild canine in Africa, and the only extant member of the genus Lycaon, which is distinguished from Canis by dentition highly specialised for a hypercarnivorous diet and by a lack of dewclaws.

References

  1. 1 2 3 4 5 Wozencraft, W. C. (2005). "Order Carnivora". In Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. pp. 532–628. ISBN   978-0-8018-8221-0. OCLC   62265494.
  2. 1 2 3 4 Leite-Pitman, M.R.P.; Williams, R.S.R. (2011). "Atelocynus microtis". IUCN Red List of Threatened Species . 2011: e.T6924A12814890. doi: 10.2305/IUCN.UK.2011-2.RLTS.T6924A12814890.en . Retrieved 19 November 2021.
  3. 1 2 Rosa, Carlos L. de la; Nocke, Claudia C. (2010-06-28). A Guide to the Carnivores of Central America: Natural History, Ecology, and Conservation. University of Texas Press. ISBN   978-0-292-78951-7.
  4. 1 2 3 Renata Leite Pitman; Robert S.R. Williams (2004). "The short eared dog (Atelocynus microtis) (Sclater, 1883)". In Claudio Sillero-Zubiri; Michael Hoffmann; David W. Macdonald (eds.). Canids: Foxes, Wolves, Jackals and Dogs: Status Survey and Conservation Action Plan (PDF) (2004 ed.). IUCN, World Conservation Union. pp. 26–31. ISBN   9782831707860.
  5. (R. Burton; International Wildlife Encyclopedia, 2002).
  6. "Atelocynus microtis (Short-eared Dog, Short-eared Fox, Small-eared Dog, Small-eared Zorro)". redlist.org. Retrieved 2015-10-05.
  7. Giaimo, Cara (2020-05-04). "The Ghost Dogs of the Amazon Get a Bit Less Mysterious". The New York Times. ISSN   0362-4331 . Retrieved 2020-05-13.
  8. "Atelocynus microtis: Information". ADW: Animal Diversity (animaldiversity.ummz.umich.edu). University of Michigan. Retrieved 2015-10-05.
  9. ebcc Archived 2012-10-16 at the Wayback Machine
  10. "Short-eared dog? Uncovering the secrets of one of the Amazon's most mysterious mammals". Mongabay Environmental News. 2014-07-28. Retrieved 2020-07-25.

Further reading