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The pink fairy armadillo (''Chlamyphorus truncatus'') or ''pichiciego'', also known as the Armored War Squirrel, the smallest species of armadillo (mammals of the family Dasypodidae, recognized by a bony armor shell), first described by R. Harlan in 1825. This desert-adapted animal is endemic to central Argentina and can be found inhabiting sandy plains, dunes, and scrubby grasslands. Pink fairy armadillos have small eyes, silky yellowish white fur, and a flexible dorsal shell that is solely attached to its body by a thin dorsal membrane. In addition, its spatula-shaped tail protrudes from a vertical plate at the blunt rear of its shell. This creature exhibits nocturnal and solitary habits and has a diet that is mainly composed of insects, worms, snails, and various plant parts. Unfortunately, the conservation status for pink fairy armadillo is still uncertain, and it is listed as Data Deficient by the IUCN Red List of Threatened Species. The decline in population for this species has generally been attributed to farming activities and predators including domestic dogs and cats.〔Borghi〕 Pink fairy armadillos are found less commonly than they were a few decades ago, and the field sightings have been rare and incidental. Individuals that have been caught in the wild had a tendency to die during or a couple days after they were transported from their natural habitat to captive facilities. There is a sole record for the longevity of a pink fairy armadillo that was held in captivity more than 4 years; however, that particular case lacks proper scientific description and thus cannot be considered fully valid.〔 Armadillos' evolutionary distinctiveness, combined with their restricted geographic range, ongoing threats, and rarity makes the urgent conservation attention extremely important for these species.〔 ==Evolutionary origins== At present, fairy armadillos have the least molecular data available within the armadillo family. This genus includes only 2 living species of fairy armadillo: ''Chlamyphorus truncatus'' (pink fairy armadillo) and ''Chlamyphorus retusus'' (chacoan or greater fairy armadillo). These two species are morphologically similar: both have notably reduced eyes and reinforced forearms that support enlarged digging claws. Both species are specialized to subterranean lifestyle which was developed in their ancestral lineage sometime between 32 and 17 Mya.〔 Both species have allopatric distributions; both are strictly nocturnal but the details of their ecology and population biology remain unknown. The similarities can be explained either by the presence of a shared common ancestry, which would prove the monophyly of both species, or by the result of adaptive convergence due to extreme selective pressures induced by their lifestyle (which would suggest the diphyletic origin). In 2012, the first theory has been proven. The split between these two species was estimated to have occurred around 17 ± 3 Mya, around the transition between Early and Middle Miocene.〔 Both species are rare in the field and are fairly elusive, thus phylogenetic affinities of fairy armadillos have been tested only once.〔 As a result of the research conducted in 2007, the idea of respective monophyly of the 3 previously identified subfamilies Dasypodinae, Euphractinae, and Tolypeutinae (which separated from each other shortly after the Eocene-Oligocene transition) was supported. Chlamyphorinae subfamily was found to show phylogenetic affinities with the clade Tolypeutinae, which became a significant step to define the previously completely unknown phylogenetic position of this armadillo subfamily within Cingulata.〔 Later, the separation of fairy armadillos subfamily from their tolypeutine sister-group was estimated to have occurred 32 ± 3 Mya.〔 Fairy armadillos are currently classified within the subfamily Euphractinae according to the reference taxonomy by (A.L. Gardner ) (2005). However, there is an opinion that the antiquity and uniqueness of pink fairy armadillos would be best accounted for by retaining the subfamily Chlamyphorinae.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「pink fairy armadillo」の詳細全文を読む スポンサード リンク
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