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Holocephali

Holocephali (sometimes spelled Holocephala; Greek for "complete head" in reference to the fusion of upper jaw with the skull) is a subclass of cartilaginous fish. The only living holocephalans are the three families of chimaeras, but the group also includes many extinct members and was more diverse during the Paleozoic and Mesozoic eras. The earliest…

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Holocephali

Nodes274
Edges273
Triples205
Avg. degree1.99
Density0.007299
Components1

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Holocephali

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related to Evolution · 43
Holocephali → Based, By, Carboniferous, Carboniferous-Permian, Cenozoic, Chimaeriformes, Chimaeroidea, Diversity, Early Devonian, Early Triassic, Early-Middle Devonian, Elasmobranchii, Eugeneodontiformes, Famennian, Germany, Givetian, Gladbachus, Jurassic, Late Devonian, Mesozoic
related to Early research · 40
Holocephali → Arthur Smith Woodward, As, Bonaparte, Both Agassiz, Bradyodonti, British, By, Callorhinchus, Cestracion, Charles Lucien Bonaparte, Chimaera, Danish, During, Edestidae, Egil Nielsen, English, Eugeneodontiformes, Fossils, Fredrick McCoy, French
related to Recent classifications · 33
Holocephali → Below, Bradyodonti, Chimaeriformes, Chondrenchelyformes, Cochliodontiformes, Copodontiformes, Debeeriiformes, Eileen Grogan, Euchondrocephali, Eugeneodontiformes, Fifth Edition, Fishes, Grogan's Euchondrocephali, Helodontiformes, Holocephalimorpha, However, In, Iniopterygiformes, Joseph, Likewise
related to Ancestry · 27
Holocephali → An, Below, Chimaeriformes, Chondrenchelyiformes, Chondrichthyes, Cochliodontimorpha, Colin Patterson, Elasmobranchii, Elasmobranchiomorpha, Erik Stensiö, Euchondrocephali, Greenfest-Allen, Grogan, In, Iniopterygiformes, Lund, Mesozoic Squaloraja, Paleozoic, Ptyctodontida, Ptyctodontiformes
related to Parasites · 6
Holocephali → Among, Cobelodus, Fossilized, Gyrocotylidea, Modern, Symmoriiformes
is a · 1
Holocephali → sister group to Elasmobranchii based on both morphology and genetics

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holocephalans chimaeras teeth tooth extinct considered also known many groups holocephalan group may early plates modern termed members although taxa

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Holocephaliis asister group to Elasmobranchii based on both morphology and genetics0.90text
sharksinstance ofelasmobranchs0.80text
raysinstance ofelasmobranchs0.80text
during the Early Devonian or the Silurian Period.Extinct holocephalans are typically divided into a number of ordersinstance ofelasmobranchs0.80text
although the relationships between these groups are poorly understoodinstance ofelasmobranchs0.80text
English biologist Richard Owen allied many Paleozoic representatives of the group with living Heterodontusinstance ofBoth Agassiz and other influential researchers0.80text
Irish zoologist Fredrick McCoyinstance ofresearchers0.80text
British naturalist James William Davis questioned the relationship between these Paleozoic fossilsinstance ofresearchers0.80text
Heterodontus.During the late 19thinstance ofresearchers0.80text
early 20th centuryinstance ofresearchers0.80text
British paleontologist Arthur Smith Woodward recognized many fossil chondrichthyans as forming a distinct taxonomic groupinstance ofresearchers0.80text
and in 1921 named this group Bradyodontiinstance ofresearchers0.80text

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