HPI 3B • Chondrichthyes II

Introduction 1
General Morphology 1
Skeleton 3
Neurocranium 3
Visceral skeleton 5
Axial skeleton 7
Pectoral and pelvic girdles 8
Unpaired fins 10
Paired fins 10
The dentition of selachians 11
Tooth histology 18
Dental characters and terminology 19
The dermal denticles 21
Habitat 24
Classification 25
Systematics 26
Class Chondrichthyes 26
Subclass Elasmobranchii 27
Order Xenacanthiformes 27
Order Eugeneodontiformes 28
Cohort Euselachii 28
Superfamily Ctenacanthoidea 28
Superfamily Hybodontoidea 30
Subcohort Neoselachii 41
Superorder Squalomorphii 44
Order Hexanchiformes 44
Suborder Chlamydoselachoidei 44
Suborder Hexanchoidei 44
Order Squaliformes 50
Order Pristiophoriformes 64
Superorder Squalomorphii ? 67
Superorder Squatinomorphii 68
Order Squatiniformes 68
Superorder Galeomorphii 69
Order Heterodontiformes 69
Order Orectolobiformes 71
Order Lamniformes 85
Order Carcharhiniformes 111
Galeomorphii incertae ordinis 128
? Galeomorphii incertae sedis 130
Neoselachii incertae ordinis 131
Superorder Batomorphii 133
Order Rajiformes 133
Suborder Rhinobatoidei 134
Rhinobatoidei incertae sedis 140
Suborder Rajoidei 143
Suborder Sclerorhynchoidei 146
Family incertae sedis (Rhinobatoidei or Sclerorhynchoidei) 156
Suborder Pristioidei 157
Order Torpediniformes 160
Order Myliobatiformes 162
Genera of Myliobatiformes based on dermal elements 178
Remains that are not sharks 178
References and Bibliography 179
Abbreviations used in Figures 185
Abbreviations of Institutions 186
Index Generum 187
Index of higher Categories 192