Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria
Cladus: Sphenacodontia
Cladus: Sphenacodontoidea
Cladus: Therapsida
Cladus: Theriodontia
Cladus: Cynodontia
Cladus: Eucynodontia
Cladus: Probainognathia
Cladus: Prozostrodontia
Cladus Mammaliaformes
Classis: Mammalia
Subclassis: Trechnotheria
Infraclassis: Zatheria
Supercohors: Theria
Cohors: Eutheria
Infraclassis: Placentalia
Cladus: Boreoeutheria
Superordo: Laurasiatheria
Cladus: Scrotifera
Cladus: Ferungulata
Cladus: Euungulata
Ordo: Perissodactyla
Subordo: Ceratomorpha
Superfamilia: Tapiroidea
Familia: †Helaletidae
Genera (†13): †Colodon – †Desmatotherium – †Dilophodon – †Helaletes – †Hesperaletes – †Heteraletes – †Irdinolophus – †Paracolodon – †Plesiocolopirus – †Protapirus – †Selenaletes – †Thuliadanta – †Vastanolophus
Name
Helaletidae Osborn, 1892: 127
References
Links
Helaletidae – Taxon details on Fossilworks.
The Helaletidae are an extinct family of tapiroid, closely related and likely ancestral to the true tapirs, which contain Protapirus and all descendants.[1] In alternative classifications, Helaletidae is treated as a subfamily within the Tapiridae, the Helaletinae.
Members of the family are defined by having less bilophodont cheek teeth compared to other tapiroids.[2]
References
Ruiz-García, M. (2012). "Phylogeography of the mountain tapir (Tapirus pinchaque) and the Central American tapir (Tapirus bairdii) and the molecular origins of the three South-American tapirs". {{cite journal}}: Cite journal requires |journal= (help)
Lucas, Spencer G. (2002). Chinese Fossil Vertebrates. Columbia University Press. p. 217. ISBN 9780231504614.
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