Children (18 direct children, 18 direct and indirect children):
Pachycerianthus fimbriatus
Pachycerianthus benedeni
Pachycerianthus aestuarii
Pachycerianthus maua
Pachycerianthus dohrni
Pachycerianthus delwynae
Pachycerianthus multiplicatus
Pachycerianthus solitarius
Pachycerianthus monostichus
Pachycerianthus longistriatus
Pachycerianthus johnsoni
Pachycerianthus curacaoensis
Pachycerianthus insignis
Pachycerianthus borealis
Pachycerianthus nobilis
Pachycerianthus magnus
Pachycerianthus schlenzae
Pachycerianthus torreyi