The remaining Peracarida orders are the abundant and either moderately cryptic , Cumacea and Tanaidacea , or are extremely rare and relictual , Mictacea , Spelaeogriphacea , and Thermosbaenacea .
The other Peracarida orders are the abundant and either moderately cryptic , Cumacea and Tanaidacea , or are extremely rare and Relictual , Mictacea , Spelaeogriphacea and Thermosbaenacea .