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Parailurus
Parailurus is an ancestral species of the Red Panda (Ailurus). First discovered in 1899 in Pliocene deposits in England, the unknown species were determined to be an extinct ancestor of today's red panda. Later fossils of Parailurus were unearthed from various locations around continental Europe and North America; the first of which was found by M. Schlosser. There was next a new discovery in Japan, marking the first appearance of the species in Asia. Most recently, more fossils were discovered by N.P. Kalmykov in western Transbaikalia, near the village of Udunga in Russia, which now placed Parailurus on the Asian mainland. The species is determined to have lived during the Pliocene and Miocene time periods. It was during the Late Pliocene that the Parailurus' habitat started to become destroyed. This resulted from the gradual cooling of the climate, progressive altiplanation, and other factors. That is when the Parailurus began to die out, leaving now its descendant the red panda only to survive in China.

Diet
The Parailurus genus mostly lived in Conifer Forests, where most of their time was spent in the tree tops. Many of the tree tops had high vertical leave covers where the Parailurus genus could receive much of its diet. A Parailurus diet mostly consisted of Bamboo shoots. The bamboo shoots are described as mostly part of the “Bambusa Lugdunesis”, “Sasa Kodorica”, or “Bambusa iljinskia” genus. It is believed that the widespread nature of these plants at the time allowed members of Parailurus to spread out as far as they did across the vast region. As well, some scientists believed that the Parailurus genus could have eaten some fruit, grasses, roots, acorns, insects, eggs, young birds, small rodents, and lichens just as its descendant the red panda does today.

Modern families
First described in 1825, the classification of the red panda has caused controversy, due to similarities with both "procyonids" such as racoons, and with the bear family. Today, the Parailurus and Red Panda are placed with the racoons, but in its own separate subfamily, the Ailurinae.

Currently, two subspecies of the red panda exist; Ailurus fulgens (Red Panda) is smaller and lighter, especially in the facial region. Like the Ailuropoda Melanoleuca (Giant Panda), red pandas also possess a modified wrist bone that acts as a sixth digit or thumb--although it is smaller than that of the better-known giant panda, Red pandas have a wide range of vocalizations, the most peculiar of which is a quack instead of a "roar".

Anatomy
The Parailurus, has a lustrous coat which is a rich, reddish-brown color on the back and white/gray on the legs resembling its fossil relative, the red panda. Long coarse guard hairs cover the dense woolly undercoat, which provides the mammal warmth. The coat provides effective camouflage amongst the trees where branches are often swathed in reddish-brown moss. The face is rounded and predominantly white with reddish brown 'tear marks' running from the corner of each eye to the mouth. The long bushy tail is marked with 12 alternating red and buff rings and the soles of the feet are covered with thick white hair to provide warmth.

The Parailurus’ anatomy closely resembles that of its still living descendent the red panda. Parailurus is known to be about 50% larger than the present day red panda. The Parailurus would walk in a dog like stance. Not much is fully known about the complete anatomy of the Parailurus. A full skelton of the Parailurus has never been found, due to this aspect it is hard for scientist to place the bones found in excavation diggings in the correct proportional area. Areas like the pelvis, femur, tibia, fibula, and the spinal vertebrate are still be arranged and studied. No clear answer in the organization of the given body parts have ever been seen. The structure of much of its body is still a mystery. However, it is clear that on the hands of the Parailurus false thumbs “radial seasmoid” were able to attach to the animals hands.

In comparison to its descendant, the Ailurus, the Parailurus' premolars have a less intricate crown. The Parailurus also has a reduced number of premolar teeth when compared to the Ailurus. The incisors too are noticeably smaller. The molars found on the creature's mandible are also noted to be less developed than its present day relative. This lack of development speaks of the creatures primitive origins and likely reflects the creatures daily diet. According to Schlosser, the morphology of the Parailurus' mandible and lower dentition also suggests that the creature may not have been a direct ancestor of the modern Ailurus but perhaps more strongly evidenced that it belonged to a sister genus

Geography
The Parailurus' remains have been recovered from locations scattered throughout the world. A premolar was located in the Pilocene Ushigabuki formation near Tochio Niigata Prefecture, Japan. This marked the first time that any remnant of the Parailurus was discovered both in Asia and outside of Europe or North America. This find insinuated that the species had grown to adapt to the vastly different environments in which they had to live and for a time they were successful and thrived. In North America, the Parailurus was discovered in the Upper Miocene to Lower Pliocene sediments in Tennessee. Remains were also found in an Upper Pliocene sediment in Washington state. With the passage of time, the environments the Parailurus had become acclimated to gradually began to degrade until the species' range was limited to China before it was eventually driven to extinction and allowing for the advent of its descendant, the Ailurus or Red Panda.

Taxonomy
Due to the limited findings of the Parailurus fossils it is much more difficult to specify what makes the genus stand out from other Ailuridae that does not become speculation. What could be found of the Parailurus has indicated that the general distinction of the group is within their "Mosaic" style teeth and much more dog-like stance. The global presence of the Parailurus resulted in a diverse group of sub-species whose specialty varied drastically from ability to climb and diet.

Contact with humans
While the Parailurus prospered in countless locations across Earth, the earliest samples of their fossils are estimated to be between 2-4 million years old. While it is impossible for them to have interacted with Homo Sapiens, there is a possibility that they interacted with the Homo Habilis whose earliest fossils were estimated to be 2.33 million years old.If such interaction existed the two species' interactions with each other left no lasting impact to be found