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Leptocyon

Mammalia - Carnivora - Canidae

Synonyms
Synonymy list
YearName and author
1918Leptocyon Matthew
1963Neocynodesmus Macdonald
1969Leptocyon Webb
1988Leptocyon Carroll
1988Neocynodesmus Carroll
1998Leptocyon Munthe
2008Leptocyon Wang and Tedford
2009Leptocyon Tedford et al. p. 14
2016Leptocyon Smith et al.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
RankNameAuthor
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
Laurasiatheria
Scrotifera
Ferae()
CarnivoramorphaWyss and Flynn 1993
CarnivoraformesFlynn et al.
orderCarnivoraBowditch 1821
suborderCaniformiaKretzoi 1943
superfamilyCanoideaSimpson 1931
familyCanidaeFischer 1817
subfamilyCaninaeGill 1872
genusLeptocyon

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
R. H. Tedford et al. 2009Leptocyon differs from Vulpes in possession of the following primi- tive characters: greater postorbital constriction; I1–I3 with medial cusplets; M1 and M2 with stronger parastyle; m1 hypoconulid absent, its entoconid relatively smaller and enlarged only in most derived species; m2 with weaker anterolabial cingulum and meta- conid smaller than or equal in size to protoconid in less derived species, postpa- rietal foramen still present in early species; humerus with entepicondylar foramen; ulna and fibula short and more robust with larger distal articular facets for radius and tibia; radius with distal exostosis in early species (Wang and Rothschild, 1992); tibia with longer anteroproximal crest, less anteriorly and distally extended proximolateral and proximomedial articular surfaces for femur; relatively larger entocuneiform and well- developed functional metatarsal I with two phalanges.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: carnivoref
Diet 2: omnivoref
Created: 2005-06-08 10:11:09
Modified: 2005-08-22 19:28:06
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Nowak 1991, Carroll 1988, Hendy et al. 2009, Ji et al. 2002

Age range: base of the Geringian to the top of the Early/Lower Clarendonian or 30.80000 to 10.30000 Ma

Collections (127 total)


Time interval Ma Country or state Original ID and collection number
Geringian30.8 - 26.3USA (South Dakota) Hesperocyon leptodus (17641) L. douglassi (17654)
Arikareean30.8 - 20.43USA (South Dakota) Neocynodesmus delicatus (17443)
Arikareean30.8 - 20.43USA (Montana) L. douglassi (17481 17722)
Arikareean30.8 - 20.43USA (Oregon) L. douglassi (159093) L. mollis (93078)
early Late Arikareean30.8 - 20.43USA (Oregon) L. vulpinus (36761)
late Late Arikareean30.8 - 20.43USA (California) L. sp. (167848 167853)
Harrisonian24.8 - 20.43USA (Nebraska) L. leidyi (17842) L. sp. (17819) Nothocyon gregorii (17846)
Harrisonian24.8 - 20.43USA (Florida) Mesocyon sp. (17837)
Harrisonian24.8 - 20.43USA (South Dakota) Cynodesmus vulpinus (17451) Hesperocyon gregorii (17456) L. gregorii (17519)
Harrisonian24.8 - 20.43USA (Wyoming) L. gregorii (17794 17811 17815)
Miocene23.03 - 5.333USA (New Mexico) L. vafer (19274 19339 19470 19519 19531)
Miocene23.03 - 5.333USA (Nebraska) Canis vafer (190543) L. sp. (18313)
Miocene23.03 - 5.333USA (Oregon) Pliotaxidea sp. (18825)
Miocene23.03 - 5.333USA (South Dakota) L. vafer (18083)
Early/Lower Hemingfordian20.43 - 15.97USA (Nebraska) L. gregorii (17898)
Hemingfordian20.43 - 15.97USA (Nebraska) L. leidyi (17902 17920 17932 17942 17952 17955 17956 17972 17978 18000 18001) L. sp. (17970) L. vulpinus (17891 17934)
Barstovian15.97 - 13.6USA (Nevada) L. leidyi (159094) L. sp. (181731) L. vafer (19097)
Barstovian15.97 - 13.6USA (Colorado) L. vafer (18220)
Barstovian15.97 - 13.6USA (California) L. leidyi (19356 19364 19366 19463 19510 19548)
Barstovian15.97 - 13.6Canada (Saskatchewan) L. vafer (18788 18790 18797)
Barstovian15.97 - 13.6USA (New Mexico) L. vafer (19535)
Barstovian15.97 - 13.6USA (Nebraska) L. sp. (18121 18141 18208 18454) L. vafer (17905 18027 18031 18109 18125 18155 18164 18192 18209 18216 18232 18266 18275 18284 18337 18363 18442 18443) Vulpes vafer (18165)
Early/Lower Barstovian15.97 - 13.6USA (Nebraska) L. leidyi (17976)
Early/Lower Barstovian15.97 - 13.6USA (New Mexico) L. leidyi (19547 19611)
Barstovian - Clarendonian15.97 - 10.3USA (Nebraska) L. vafer (18306)
Barstovian - Early/Lower Clarendonian15.97 - 10.3USA (New Mexico) L. vafer, Canidae indet. (19286)
Barstovian - Early/Lower Clarendonian15.97 - 10.3USA (Kansas) L. sp. (18187)
Clarendonian13.6 - 10.3USA (South Dakota) L. matthewi (18200 18268) L. sp. (18063)
Clarendonian13.6 - 10.3USA (Nebraska) L. matthewi (18042 18095 18171 18218 18222 18227 18321 18336 18496) L. sp. (18221 18324 188779) L. vafer (18077 18106 18157 18217 18242 18260 18378)
Clarendonian13.6 - 10.3USA (California) L. sp. (19145) L. tejonensis (19553) L. vafer (19322 19323) Vulpes sp. (19517) Vulpes vafer (19185)
Clarendonian13.6 - 10.3USA (Texas) Canidae indet. (18611)
Clarendonian13.6 - 10.3USA (Kansas) L. sp. (18219)
Clarendonian13.6 - 10.3USA (Nevada) L. matthewi (18888) L. vafer (18845 19035)
Early/Lower Clarendonian13.6 - 10.3USA (Nebraska) L. matthewi (18134)
Late/Upper Clarendonian13.6 - 10.3USA (New Mexico) L. vafer, L. matthewi (19528)
Late/Upper Clarendonian13.6 - 10.3USA (Florida) L. sp. (18554)
Late/Upper Clarendonian13.6 - 10.3USA (Nebraska) L. matthewi (18327) L. sp. (18066)
Late/Upper Clarendonian13.6 - 10.3USA (Kansas) L. vafer (110829)
Clarendonian - Hemphillian13.6 - 4.9USA (Nebraska) L. matthewi (18069)