Figure 3 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 3. Key characters for identification of the Carybdeida: (A) location of taxonomic characters (Carybdea brevipedalia; image courtesy of Alvaro Migotto), (B) T-shaped rhopaliar niche ostium; note the three scales covering the niche, thus leaving a T-shaped ostium, (C) heartshaped rhopaliar niche ostium; niche ostium with only one upper covering scale, (D) key-hole shaped rhopaliar niche ostium in Copula sivickisi, (E) frown-shaped rhopaliar niche ostium in Tripedalia, (F) frown-shaped rhopaliar niche ostium in Tamoya, (G) frown-shaped rhopaliar niche ostium with rhopaliar horns in Malo, (H, I) vertical gastric phacellae in the stomach of Tamoya, (J) multiple pedalia on each corner of the swimming bell in Tripedalia, (K) crescentric gastric phacellae in Alatina (apical view). cs: covering scale, ma: manubrium, ph: gastric phacellae (comprises gastric cirri) in the stomach cavity, pc: pedalial canal, pcb: pedalial canal bend, pe: pedalium, rh: rhopalium, rn: rhopaliar niche that opens on the exumbrellar side of the bell with the rhopaliar niche ostium, rno: rhopaliar niche ostium, rho: rhopaliar horn, sto: stomach, te: tentacle, ve: velarium, vec: velarial canal.