ORDER IBLOMORPHA BUCKERIDGE & NEWMAN, 2006

Diagnosis: As the Ibliformes by Buckeridge & Newman (2006); with paired phosphatic scuta and terga; the scutum adductor muscle is positioned postorally; a comb collar (Buckeridge & Newman, 2006) surrounds the edge of the mantle opening.

Comment: We change the name only to have thoracican order-level taxa with the same ‘-morpha’ suffix. The morphological characters are likely to be plesiomorphic, but the two species are sister species and form a sister group to all other extant thoracicans based on molecular analyses.