subclass holocephali(n = noun.animal) holocephali - chimaeras and extinct forms;
is a kind of class
is a member of chondrichthyes, class chondrichthyes

holocephali, subclass, subclass acnidosporidia, subclass actinopoda, subclass alismatidae, subclass amphineura, subclass anapsida, subclass archaeornithes, subclass archosauria, subclass arecidae, subclass asteridae, subclass branchiopoda, subclass caryophyllidae, subclass cirripedia, subclass cnidosporidia, subclass commelinidae, subclass copepoda, subclass crossopterygii, subclass diapsida, subclass dibranchia, subclass dibranchiata, subclass dilleniidae, subclass dipnoi, subclass discomycetes, subclass elasmobranchii, subclass entomostraca, subclass euascomycetes, subclass euryalida, subclass eutheria, subclass exopterygota, subclass hamamelidae, subclass heterobasidiomycetes, subclass homobasidiomycetes, subclass infusoria, subclass lepidosauria, subclass liliidae, subclass magnoliidae, subclass malacostraca, subclass metatheria, subclass ophiurida, subclass opisthobranchia, subclass ostracoda, subclass pantotheria, subclass phytomastigina, subclass prototheria, subclass rhizopoda, subclass rosidae, subclass selachii, subclass synapsida, subclass teleostei, subclass telosporidia, subclass zoomastigina