HPI 3A • Chondrichthyes I

General Morphology 1
The dermal skeleton 1
Teeth and dentition 5
The morphology of the teeth 5
Tooth histology 10
The morphology of the dentition 15
Endoskeleton 17
Neurocranium 17
Visceral skeleton 23
Vertebral column 27
Girdles and paired fins 27
Shoulder girdle 27
Pectoral fin 29
Pelvic girdle 30
Pelvic fin 30
Phyletic trends in the differentiation of the paired fins 31
The question of the origin of the paired fins 32
Unpaired fins 32
Dorsal fin(s) 33
Anal fin 33
Caudal fin 33
Sensory lines 34
Digestive system, muscles, kidneys, «ink sac» 35
Overall habitus (Gestalt) 35
Habitat and Adaptations 36
Relationships 37
Classification and Phylogeny 39
Systematics 41
Class Chondrichthyes 41
Subclass Subterbranchialia 41
Superorder (unnamed) 42
Order Iniopterygia 42
Unnamed order 45
Unnamed order 45
Superorder Holocephali BONAPARTE 1832-41 46
Unnamed order 46
Order Bradyodontida 46
Incertae sedis 46
Suborder Chimaerina nov. 46
Subclass Elasmobranchii BONAPARTE 1838 49
Order Euselachii HAY 1902 51
Superfamily Ctenacanthoidea nov. 51
Superfamily Hybodontoidea nov. 56
Superfamily Protacrodontoidea nov. 61
Order Desmiodontida nov. 62
Order Xenacanthida GLIKMAN 1964A 63
Order Cladoselachida DEAN 1909C 66
Order Coronodontida nov. 68
Order Symmoriida nov. 69
Order Eugeneodontida nov. 74
Superfamily Caseodontoidea nov. 79
Superfamily Edestoidea HAY 1930A 85
Order Orodontida nov. 90
Order Petalodontida nov. 94
Order Squatinactida nov. 101
Presumed elasmobranch remains 101
Isolated neurocrania. 101
Isolated teeth, or parts of dentitions 102
Mucous membrane denticles. 103
Dermal denticles 103
Ichthyodorulites (presumably belonging to elasmobranchs) 104
References and Bibliography 107
Abbreviations used in Figures 111
Index Generum 112
Index of higher Categories 115