Ailuridae

Last updated

Ailuridae
Temporal range: Oligocene–Recent
Ailurus fulgens RoterPanda LesserPanda.jpg
Red panda (Ailurus fulgens)
Simocyon batalleri head.jpg
Skull and life restoration of Simocyon
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Superfamily: Musteloidea
Family: Ailuridae
Gray, 1843
Subfamilies
Ailurus fulgens distribution map 2017.png
Extant red panda distribution

Ailuridae is a family in the mammal order Carnivora. The family consists of the red panda (the sole living representative) and its extinct relatives.

Contents

Georges Cuvier first described Ailurus as belonging to the raccoon family in 1825; this classification has been controversial ever since. [1] It was classified in the raccoon family because of morphological similarities of the head, colored ringed tail, and other morphological and ecological characteristics. Somewhat later, it was assigned to the bear family. [2]

Molecular phylogenetic studies had shown that, as an ancient species in the order Carnivora, the red panda is relatively close to the American raccoon and may be either a monotypic family or a subfamily within the procyonid family. [1] [3] [4] An in-depth mitochondrial DNA population analysis study stated: "According to the fossil record, the Red Panda diverged from its common ancestor with bears about 40 million years ago." [1] [5] With this divergence, by comparing the sequence difference between the red panda and the raccoon, the observed mutation rate for the red panda was calculated to be on the order of 109, which is apparently an underestimate compared with the average rate in mammals. [6] This underestimation is probably due to multiple recurrent mutations as the divergence between the red panda and the raccoon is extremely deep.[ citation needed ]

The most recent molecular-systematic DNA research places the red panda into its own independent family, Ailuridae. Ailuridae are, in turn, part of a trichotomy within the broad superfamily Musteloidea [7] that also includes the Procyonidae (raccoons) and a group that further subdivides into the Mephitidae (skunks) and Mustelidae (weasels); but it is not a bear (Ursidae). [8]

Ailurids appear to have originated during the Late Oligocene to Early Miocene in Europe. The earliest known member, Amphictis , was likely an unspecialised carnivore, based on its dentition. Ailurids subsequently dispersed into Asia and North America. The puma-sized Simocyon found in Middle Miocene-Early Pliocene of Europe, North America and China was likely a hypercarnivore. Like modern red panda it had a "false thumb" to aid in climbing. Members of the subfamily Ailurinae, which includes the modern red panda as well as the extinct genera Pristinailurus and Parailurus , developed a specialised dental morphology with blunted cusps, creating an effective grinding surface to process plant material. [9]

Classification

The relationship of the Ailuridae with other carnivorans is shown in the following phylogenetic tree, which is based on the molecular phylogenetic analysis of six genes in Flynn (2005), [10] with the musteloids updated following the multigene analysis of Law et al. (2018). [11]

Carnivora

In addition to Ailurus, the family Ailuridae includes seven extinct genera, most of which are assigned to three subfamilies: Amphictinae, Simocyoninae, and Ailurinae. [12] [13] [14] [15] [16]

An additional, unnamed taxon called only "Ailurinae indet." was described in 2001 based on an upper molar from Four, a Middle Miocene-age locality near Isère, France. [19]

Related Research Articles

<span class="mw-page-title-main">Carnivora</span> Order of mammals

Carnivora is an order of placental mammals that have specialized in primarily eating flesh, whose members are formally referred to as carnivorans. The order Carnivora is the sixth largest order of mammals, comprising at least 279 species on every major landmass and in a variety of habitats, ranging from the cold polar regions of Earth to the hyper-arid region of the Sahara Desert and the open seas. Carnivorans exhibit a wide array of body plans, varying greatly in size and shape.

<span class="mw-page-title-main">Red panda</span> Species of mammal in Asia

The red panda, also known as the lesser panda, is a small mammal native to the eastern Himalayas and southwestern China. It has dense reddish-brown fur with a black belly and legs, white-lined ears, a mostly white muzzle and a ringed tail. Its head-to-body length is 51–63.5 cm (20.1–25.0 in) with a 28–48.5 cm (11.0–19.1 in) tail, and it weighs between 3.2 and 15 kg. It is well adapted to climbing due to its flexible joints and curved semi-retractile claws.

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

Procyonidae is a New World family of the order Carnivora. It includes the raccoons, ringtails, cacomistles, coatis, kinkajous, olingos, and olinguitos. Procyonids inhabit a wide range of environments and are generally omnivorous.

<span class="mw-page-title-main">Ailurinae</span> Subfamily of carnivores

Ailurinae is a subfamily of Ailuridae. While it is represented by the extant genus Ailurus, there were a handful of genera whose fossils have been found across the Holarctic region. These include the Middle Miocene Magerictis of Spain, the Early Pliocene Pristinailurus of the United States of America and their sister taxon Parailurus of Eurasia and North America in the Pliocene. Unlike Ailurus which is a specialized arboreal bamboo forager, the extinct ailurine species were more generalized and spent their time foraging on the ground.

<span class="mw-page-title-main">Amphicyonidae</span> Extinct family of carnivores

Amphicyonidae is an extinct family of terrestrial carnivorans belonging to the suborder Caniformia. They first appeared in North America in the middle Eocene, spread to Europe by the late Eocene, and further spread to Asia and Africa by the early Miocene. They had largely disappeared worldwide by the late Miocene, with the latest recorded species at the end of the Miocene in Africa. They were among the first carnivorans to evolve large body size. Amphicyonids are colloquially referred to as "bear-dogs".

<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">Nimravidae</span> Extinct family of mammals in the order Carnivora

Nimravidae is an extinct family of carnivorans, sometimes known as false saber-toothed cats, whose fossils are found in North America and Eurasia. Not considered to belong to the true cats, the nimravids are generally considered closely related and classified as a distinct family in the suborder Feliformia. Fossils have been dated from the Middle Eocene through the Late Miocene epochs, spanning about 33.2 million years.

<span class="mw-page-title-main">Ailuropodinae</span> Subfamily of bears

Ailuropodinae is a subfamily of Ursidae that contains only one extant species, the giant panda of China. The fossil record of this group has shown that various species of pandas were more widespread across the Holarctic, with species found in places such as Europe, much of Asia, North America and even Africa. The earliest pandas were not unlike other modern bear species in that they had an omnivorous diet but by around 2.4 million years ago, pandas have evolved to be more herbivorous.

<span class="mw-page-title-main">Barbourofelidae</span> Extinct family of feliform carnivorans

Barbourofelidae is an extinct family of carnivorans of the suborder Feliformia, sometimes known as false saber-toothed cats, that lived in North America, Eurasia and Africa during the Miocene epoch and existed for about 7.9 million years. Thought to be an independent lineage from the Nimravidae and Machairodontinae, which had all attained elongated canines, recent research argues that it may be a subfamily of the Nimravidae, extending its biochronological range into the Miocene, although this issue is not yet fully resolved.

<span class="mw-page-title-main">Carnivoramorpha</span> Clade of carnivores

Carnivoramorpha is a clade of placental mammals of clade Pan-Carnivora from mirorder Ferae, that includes the modern order Carnivora and its extinct stem-relatives.

<i>Simocyon</i> Extinct genus of carnivores

Simocyon is a genus of extinct carnivoran mammal in the family Ailuridae. Simocyon, which was about the size of a mountain lion, lived in the late Miocene and early Pliocene epochs, and has been found in Europe, Asia, and rarely, North America and Africa.

Alopecocyon is a fossil genus of ailurid belonging to the subfamily Simocyoninae. It has two species, Alopecocyon goeriachensis and Alopecocyon getti. It is based on fragmentary fossils dating to the middle Miocene of both Europe and Asia.

<span class="mw-page-title-main">Musteloidea</span> Superfamily of carnivoran mammals

Musteloidea is a superfamily of carnivoran mammals united by shared characteristics of the skull and teeth. Musteloids are the sister group of pinnipeds, the group which includes seals.

Parailurus is a genus of extinct carnivoran mammal in the family Ailuridae. It was about 50% larger than Ailurus and lived in the early to late Pliocene Epoch, and its fossils have been found in Europe, North America, and Japan.

<span class="mw-page-title-main">Simocyoninae</span> Extinct subfamily of carnivores

Simocyoninae is an extinct subfamily of Ailuridae. The taxonomic history of this group was complicated, as researchers placed various fossil caniform genera into the subfamily. In addition to Simocyon, there was also Oligobunis, Cephalogale, and Enhydrocyon. This subfamily was initially classified within the Canidae or dog family. This idea went even further in 1910 when American paleontologist Henry Fairfield Osborn considered dholes, African wild dogs, and bush dogs to be the only extant representation left of the simocyonines. This was in large part to the overall similarity in the morphology of their molars, which suggested a shared ancestry of hypercarnivory. This view point was not supported by European paleontologists who believed that Simocyon was more closely related to musteloids. Soon the Simocyoninae were found as extinct subfamily of procyonids, or members of the raccoon-family, due to similarity of the basicranium of these animals. This was supported by subsequent researchers. It was not until a more completed skull of a Simocyon found in north Shaanxi, China was described by Wang (1997) who found that Simocyoninae is closely related Ailurinae on the basis of cranial and dental characteristics.

<i>Amphictis</i> Genus of extinct carnivore

Amphictis is an extinct genus of ailurid that existed from the Late Oligocene to the Middle Miocene with fossils found in Eurasia and North America with a total of nine described species. The interrelationships of the different species as well as their relationship to the other ailurids is not fully understood. Usually Amphictis is classified in the basal monotypic subfamily Amphictinae, but there is no certainty as the genus could potentially be a paraphyletic with the Oligocene species A. borbonica being a potential sister taxon to the ancestor of the subfamily Ailurinae, while a Middle Miocene clade consisting of an anagenesis line from A. prolongata–to–A. wintershofensis–to–A. cuspida being closer to the ancestry of the now extinct Simocyoninae. This is due to the nature of their plesiomorphic nature of their anatomy.

<i>Actiocyon</i> Extinct genus of carnivores

Actiocyon was an extinct genus of ailurid that existed from the Middle Miocene of North America. The type species, Actiocyon leardi, was described in 1947 by the American paleontologist Chester Stock.

Magerictis is a fossil genus of ailurid with a single species Magerictis imperialenis, which was originally known from a single m2 tooth. Several more specimens were later found, but were undescribed as of 2014.

Protursus is a fossil genus of ailurid with a single species Protursus simpsoni, known from a single left m2 tooth.

<i>Parailurus anglicus</i> Extinct species of mammal

The English panda is a one of three species of the extinct genus Parailurus. Parailurus anglicus was native to Europe, more specifically the British Isles, Slovakia, Romania, Germany, and Hungary. Parailurus anglicus was twice the size of modern red pandas, and used to be classified in their genus Ailurus until 1899 following a study.

References

  1. 1 2 3 Mayr, E. (1986). "Uncertainty in Science: is the Giant panda a bear or a raccoon?". Nature. 323 (6091): 769–771. Bibcode:1986Natur.323..769M. doi:10.1038/323769a0. PMID   3774006. S2CID   4317414.
  2. Roberts, M.S.; Gittleman, J.L. (1984). "Ailurus fulgens". Mammalian Species (222). American Society of Mammalogists: 1–8. doi: 10.2307/3503840 . JSTOR   3503840.
  3. Zhang, Y.P.; Ryder, O.A. (1993). "Mitochondrial DNA sequence evolution in the Arctoidea". PNAS . 90 (20): 9557–9561. Bibcode:1993PNAS...90.9557Z. doi: 10.1073/pnas.90.20.9557 . PMC   47608 . PMID   8415740.
  4. Slattery, J.P.; O'Brien, S.J. (1995). "Molecular Phylogeny of the Red Panda (Ailurus fulgens)". J. Hered. 86 (6): 413–422. doi:10.1093/oxfordjournals.jhered.a111615. PMID   8568209.
  5. Bing, Su; Fu, Yunxin; Wang, Yingxiang; Jin, Li; Chakraborty, Ranajit (2001). "Genetic Diversity and Population History of the Red Panda (Ailurus fulgens) as Inferred from Mitochondrial DNA Sequence Variations". Molecular Biology and Evolution. 18 (6): 1070–1076. doi: 10.1093/oxfordjournals.molbev.a003878 . PMID   11371595.
  6. Li, Wen-Hsiung (2007). Molecular Evolution. Sinauer Associates. ISBN   978-0-87893-480-5.[ page needed ]
  7. Flynn et al., 2001[ full citation needed ]
  8. Flynn, John J.; Nedbal, Michael A.; Dragoo, Jerry W.; Honeycutt, Rodney L. (1 November 2000). "Whence the Red Panda?" (PDF). Molecular Phylogenetics and Evolution. 17 (2): 190–99. doi:10.1006/mpev.2000.0819. ISSN   1055-7903. PMID   11083933. Archived from the original (PDF) on 13 April 2018. Retrieved 11 February 2018.
  9. Salesa, Manuel J.; Peigné, Stéphane; Antón, Mauricio; Morales, Jorge (2022), "Evolution of the family Ailuridae: origins and Old-World fossil record", Red Panda, Elsevier, pp. 15–29, doi:10.1016/b978-0-12-823753-3.00007-7, ISBN   9780128237533, S2CID   243825496 , retrieved 2022-06-29
  10. Flynn, J.J.; Finarelli, J.A.; Zehr, S.; Hsu, J.; Nedbal, M.A. (2005). "Molecular phylogeny of the Carnivora (Mammalia): Assessing the impact of increased sampling on resolving enigmatic relationships". Systematic Biology. 54 (2): 317–337. doi: 10.1080/10635150590923326 . PMID   16012099.
  11. Law, Chris J.; Slater, Graham J.; Mehta, Rita S. (2018-01-01). "Lineage Diversity and Size Disparity in Musteloidea: Testing Patterns of Adaptive Radiation Using Molecular and Fossil-Based Methods". Systematic Biology. 67 (1): 127–144. doi: 10.1093/sysbio/syx047 . ISSN   1063-5157. PMID   28472434.
  12. McKenna, M.C.; Bell, S.K. (1997). Classification of Mammals Above the Species Level. Columbia University Press. ISBN   9780231528535.[ page needed ]
  13. Peigné, S.; Salesa, M.; Antón, M.; Morales, J. (2005). "Ailurid carnivoran mammal Simocyon from the late Miocene of Spain and the systematics of the genus" (PDF). Acta Palaeontologica Polonica. 50: 219–238.
  14. Salesa, M.; Antón, M.; Peigné, S.; Morales, J. (2006). "Evidence of a false thumb in a fossil carnivore clarifies the evolution of pandas". Proceedings of the National Academy of Sciences. 103 (2): 379–382. Bibcode:2006PNAS..103..379S. doi: 10.1073/pnas.0504899102 . PMC   1326154 . PMID   16387860.
  15. Wallace, S.C.; Wang, X. (2004). "Two new carnivores from an unusual late Tertiary forest biota in eastern North America". Nature. 431 (7008): 556–559. Bibcode:2004Natur.431..556W. doi:10.1038/nature02819. PMID   15457257. S2CID   4432191.
  16. Morlo, Michael; Peigné, Stéphane (2010). "Molecular and morphological evidence for Ailuridae and a review of its genera". In Goswami, Anjali; Friscia, Anthony (eds.). Carnivoran Evolution: New Views on Phylogeny, Form, and Function. pp. 92–140. doi:10.1017/CBO9781139193436.005. ISBN   978-0-521-73586-5.
  17. Baskin, Jon A. (2017). "Additional carnivorans from the early Hemingfordian Miller Local Fauna, Florida". Journal of Vertebrate Paleontology. 37 (2): e1293069. Bibcode:2017JVPal..37E3069B. doi:10.1080/02724634.2017.1293069. S2CID   90182619.
  18. Smith, Kent; Czaplewski, Nicholas; Cifelli, Richard (2016). "Middle Miocene carnivorans from the Monarch Mill Formation, Nevada". Acta Palaeontologica Polonica. 61 (1): 231–252. doi: 10.4202/app.00111.2014 .
  19. Ginsburg, Leonard; Maridet, Olivier; Mein, Pierre (2001). "Un Ailurinae (Mammalia, Carnivora, Ailuridae) dans le Miocène moyen de Four (Isère, France)" [An Ailurinae (Mammalia, Carnivora, Ailuridae) in the middle Miocene of Four (Isère, France)]. Geodiversitas (in French). 23 (1): 81–85.

Further reading