A taxonomic subclass within the class Chondrichthyes – the ghost sharks or chimaera. Sequence analysis on living chimaera suggests the whole group originated 420 million years ago … A calcified cartilaginous skeleton and internal fertilization, among other traits, link the Holocephali (“whole heads”) with the elasmobranchs.Holocephalans arguably date back to at least the Late Devonian (Fig. What does holocephali mean? The earliest fossils are of teeth and come from the Devonian period. The subclass Holocephali ("complete heads") is a taxon of cartilaginous fish, of which the order Chimaeriformes is the only surviving group.. Holocephali has an extensive fossil record that starts during the Devonian period. However, most fossils are teeth, and the body forms of numerous species are not known, or at best, poorly understood. Holocephali have a long fossil record that starts during the Devonian period. nov. Freebase (0.00 / 0 votes) Rate this definition: Holocephali. [holo- + G. kephalē, head] Meaning of holocephali. Definition of holocephali in the Definitions.net dictionary. Wikispecies ; Holocephali on Wikimedia Commons. However, most fossils are teeth, and the body forms of numerous species are not known, or, at best, poorly understood. "o`los whole + kefalh` head.] Subclass Holocephali . Little is known about these primitive forms, and the only surviving group in the subclass is the order Chimaeriformes. Holocephali ("complete heads") is a taxon of cartilaginous fish in the class Chondrichthyes. Outcrops of this unit are frequent at the state of São Paulo eastern belt. Hyponyms (class): Chimaeriformes - sole extant order; Further reading . Living chondrichthyeans comprise the sharks and rays (Elasmobranchii, meaning plate-gilled) and the chimaeras (Holocephali, meaning whole or entire head). New Latin, nominative plural of formation from Ancient Greek ὅλος (holos, “whole”) + κέφαλος (kephalos, “head”) Wikipedia ; Holocephali on Wikispecies. holocephalic: ( hol'ō-sĕ-fal'ik ), Denoting a fetus with a complete head but having deficiencies in other body parts. Origin. ABSTRACT A chimaeroid mandibular dental plate from the nearshore upper Oligocene Sooke Formation west of Victoria, Vancouver Island, British Columbia, is described here as a new genus of chimaerid fish (Holocephali, Chimaeridae), Canadodus suntoki, gen. et sp. 11.29). Origin: [NL., from Gr. Two members of the Irati are recognized at this state, Assistência, the upper, and Taquaral. Holocephali on Wikipedia. The earliest fossils are of teeth and come from the Devonian period. The Permian (Cisuralian) Irati Formation, from the Brazilian southeastern Paraná Basin bears, at some levels, Chondrichthyes, besides other vertebrates. 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