Figure 1 in An illustrated key and synopsis of the families and genera of carybdeid box jellyfishes (Cnidaria: Cubozoa: Carybdeida), with emphasis on the "Irukandji family" (Carukiidae)

Figure 1. Family level relationships within Cubozoa following Bentlage et al. (2010). Key characters to the orders and families are indicated on the branches of the cladogram. Detailed explanations of the characters can be found in the dichotomous key and associated figures. Chirodropida possess multiple tentacles per pedalium (A) whereas Carybdeida possess a single tentacle per pedalium (B). In the Tripedaliidae multiple pedalia each bearing a single tentacle may be present that can be mistaken for multiple tentacles arising from a single pedalium. The families of the Carybdeida can be identified using the following characters. Alatinidae (C): rhopaliar niche ostium T-shaped. Carukiidae (D): rhopaliar niche ostium with rhopaliar horns, stomach lacking gastric phacellae. Tamoyidae (E): rhopaliar niche ostium frown-shaped, lacking rhopaliar horns, gastric phacellae vertical. Tripedaliidae (F): rhopaliar niche ostium keyhole-shaped, or alternatively rhopaliar niche ostium frown-shaped and two or three pedalia per corner instead of one. Carybdeidae (G): rhopaliar niche ostium heart-shaped.