FIGURE 4 Euphysilla pyramidata. A, B, C in Integrative systematics illuminates the relationships in two sponge-associated hydrozoan families (Capitata: Sphaerocorynidae and Zancleopsidae)

FIGURE 4 Euphysilla pyramidata. A, B, C) Polyps from the Maldives. D) Close-up of a hydranth showing the typical colouration. E) Hypostome with nematocysts (arrowhead). F) Longitudinal organisation of tentacles. G) Polyps with medusa buds. H) Large stenoteles (ls), small stenoteles (ss), I) desmonemes, and J) heteronemes from the polyp. K, L) Medusae with medusa buds. M) Detail of a bulb showing a reduced abaxial ocellum (arrowhead). Scale bars: A) 0.5 mm; B-D, G) 0.2 mm; E, F) 0.1 mm; H-J) 5 Μm; K, L) ~ 1 mm; M) ~ 0.3 mm.