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Feliformia is a suborder within the order Carnivora consisting of "cat-like" carnivorans, including Felidae, , , , and related taxa. Feliformia stands in contrast to the other suborder of Carnivora, Caniformia consisting of "dog-like" carnivorans (includes Canoidea).
The separation of the Carnivora into the broad groups of feliforms and caniforms is widely accepted, as is the definition of Feliformia and Caniformia as suborders (sometimes superfamilies). The classification of feliforms as part of the Feliformia suborder or under separate groupings continues to evolve.
Systematic classifications dealing with only extant taxa include all feliforms into the Feliformia suborder, though variations exist in the definition and grouping of families and genera.Taxonomic references - extant species (1): Supporting descriptive information and pictures: Diversity Web (online) – FeliformiaTaxonomic references - extant species (2): Integrated Taxonomic Information System (ITIS) Indeed, molecular phylogenies suggest that all extant Feliformia are monophyletic.Eizirik, E., W.J. Murphy, K.P. Koepfli, W.E. Johnson, J.W. Dragoo, R.K.Wayne, en S.J. O’Brien, 2010. Pattern and timing of the diversification of the mammalian order Carnivora inferred from multiple nuclear gene sequences. Molecular Phylogenetics and Evolution 56: 49–63.
Systematic classifications dealing with both extant and extinct taxa vary more widely.Fossil record data (with taxonomic references) extant and extinct species: The Paleaobiology Database Supporting taxonomic references extant and extinct species: Systema Naturae 2000 / Classification - Suborder Feliformia Some separate the feliforms (extant and extinct) as Aeluroidea (superfamily) and Feliformia (suborder). Others include all feliforms (extant, extinct and "possible ancestors") into the Feliformia suborder. Some studies suggest this inclusion of "possible ancestors" into Feliformia (or even Carnivora) may be spurious. The extinct (†) families as reflected in the taxa chart are the least problematic in terms of their relationship with extant feliforms (with the most problematic being Nimravidae).
The specific characteristics of extant feliform bullae suggest a common ancestor, though one has not been identified in the fossil records. There are other characteristics that differentiate feliforms from caniforms and probably existed in their stem taxa. But, due to speciation, these do not apply unambiguously to all extant species.
Feliforms tend to have shorter rostrums (snouts) than caniforms, fewer teeth, and more specialized . Feliforms tend to be more carnivorous and are generally ambush hunters. Caniforms tend more toward omnivorous and opportunity-based feeding. However, omnivorous feliforms also exist, particularly in the family Viverridae.
Many feliforms have retractile or semi-retractile claws and many are arboreal or semi-arboreal. Feliforms also tend to be more digitigrade (walking on toes). Most caniforms are terrestrial and have non-retractile claws.
An overview of each family is provided here. For detailed taxa and descriptions of the species in each family, follow the links to other articles and external references.
Family Eupleridae (the "Malagasy carnivorans") includes fossa, falanouc, Malagasy civet and Galidiinae, all of which are restricted to the island of Madagascar. The eight species in the family exhibit significant variations in form. These differences initially led to the species in this family sharing common names with, and being placed in the different families of, apparently more similar species on the mainland (e.g. civets and mongoose). However, phylogenetic analysis of DNA provides strong evidence that all Malagasy fauna carnivorans evolved from a single common ancestor that was a herpestid (Yoder et al. 2003).Anne D. Yoder and John J. Flynn 2003: Origin of Malagasy CarnivoraYoder, A., M. Burns, S. Zehr, T. Delefosse, G. Veron, S. Goodman, J. Flynn. 2003: Single origin of Malagasy Carnivora from an African ancestor – Letters to Nature Phylogenetic analysis supports this view and places all of the Malagasy carnivorans in the family Eupleridae.Philippe Gaubert, W. Chris Wozencraft, Pedro Cordeiro-Estrela and Géraldine Veron. 2005 - Mosaics of Convergences and Noise in Morphological Phylogenies: What's in a Viverrid-Like Carnivoran?
The differences in form make it difficult to concisely summarise the species in this family. The range in size is as diverse as the range in form, with smaller species at less than 500 g (1 lb) and the largest species at up to 12 kg (26 lb). Some have retractile or semi-retractile claws (the fossa and the Malagasy civet) and others do not (the falanouc and Malagasy mongooses). They all tend to have slender bodies and pointed rostra (except the fossa, which has a blunt snout). Diet varies with size and form of the species and, like their mainland counterparts, ranges from small mammals, insects and invertebrates through to crustaceans and molluscs.
Family Felidae (cats) are the most widespread of the "cat-like" carnivorans. There are 41 extant species, and all but a few have retractile claws. This family is represented on all continents except for Australia (where domestic cats have been introduced) and Antarctica. The species vary in size from the tiny black-footed cat ( Felis nigripes) at only 2 kg (4.5 lb) to the tiger ( Panthera tigris) at 300 kg (660 lb). Diet ranges from large to small mammals, and insects (depending on species size).
Family Hyaenidae ( and aardwolf) has four extant species and two subspecies. All show features of convergent evolution with , including non-retractile claws, long muzzles, and adaptations to running for long distances. They are extant in the Middle East, India and Africa. Hyenas are large, powerful animals, up to 80 kg (176 lb) and represent one of the most prolific large carnivorans on the planet. The aardwolf is much smaller and is a specialised feeder, eating mainly harvester termites.
Family Herpestidae (, Crossarchus, and the meerkat) has 32 species. Previously, these were placed in the family Viverridae. However, Wilson and Reeder (1993) established the herpestids as morphologically and genetically distinct from viverrids. They are extant in Africa, Middle East and Asia. All have non-retractile claws. They are smaller as a family, ranging from 1 kg (2.2 lb) to 5 kg (11 lb), and typically have long, slender bodies and short legs. Diet varies based on species size and available food sources, ranging from small mammals, birds to , insects and . Some species are omnivore, including and in their diet.
Family Nandiniidae (the African palm civet) has only one species ( Nandinia binotata), extant across sub-Saharan Africa. They have retractile claws and are slender-bodied, arboreal omnivores (with fruit making up much of their diet). They are relatively small with the larger males weighing up to 5 kg (11 lb).
Family Prionodontidae () has two extant species in one genus. They live in Southern-East Asia. All are arboreal hypercarnivorous. They are the closest living relatives of the family Felidae.Gaubert, P., & Veron, G. (2003). "Exhaustive sample set among Viverridae reveals the sister-group of felids: the linsangs as a case of extreme morphological convergence within Feliformia". Proceedings of the Royal Society, Series B, 270 270 (1532): 2523–30.
Family Viverridae (all but two , genets, oyans, and the binturong) has 30 living species. They all have long bodies, short legs with retractile claws, and usually long tails. In weight, the species range from . Some occur in Southern Europe, but most in Africa and Asia. Their diet ranges from fruit and plants to insects, and , and small mammals.
The miacoids are divided into two groups: the miacids, with a full complement of molars, and the viverravines with a reduced number of molars and more specialized carnassials. These dental differences resemble the difference between Caniforms (with more teeth) and Feliforms (with fewer teeth) but this may not mean evolutionary lineages. It was thought that Viverravidae was basal to the Feliforms. However, some studies suggest this is not the case.
In the Middle Eocene (about 42 mya), the miacids started to branch into two distinct groups of the order Carnivora: the Feliforms and Caniforms. The miacid precursors to the extant Feliforms remained forest-dwelling, arboreal or semi-arboreal ambush hunters, while the Caniform precursors were more mobile, opportunistic hunters. While it is clear that the first Feliforms appeared at this time, there is no clear common ancestor of the Feliform families in the fossil records. As forest dwellers, the early Feliforms were subject to more rapid decomposition in the absence of sedimentary materials, resulting in large gaps in the fossil records.
For more discussion on feliform evolution and the divergence from the caniforms, together with additional external references on this subject, see the articles on Carnivora, Miacoidea and Carnivoramorpha.
Family Stenoplesictidae is a Polyphyly family of Extinction viverrid-like feliforms.
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