Pennatulacea Verrill 1865

described accepted species

• Appeltans et al: 220

percent of marine species currently described

• Appeltans et al: 69

percent synonyms among marine species

• Appeltans et al: 51

total unknown marine species

• Appeltans et al: 100

undescribed marine species present in museum collections

• Appeltans et al: 20

undiscovered marine morphospecies

• Appeltans et al: 80