A new species of stauromedusa, Calvadosia festivala (Cnidaria: Staurozoa: Kishinouyeidae) from India.

Staurozoa is a cnidarian class represented by marine benthic animals, mainly observed in intertidal and subtidal cold waters. As one of the few exceptions, in this study we described a tropical species, Calvadosia festivala n. sp.

Reproductive and environmental traits explain the variation in egg size among Medusozoa (Cnidaria).

Medusozoa (Cnidaria) are characterized by diverse life cycles, with different semaphoronts (medusa, medusoid, fixed gonophore, polyp) representing the sexual phase and carrying the gametes. Although egg size is often considered a proxy to understand reproductive and developmental traits of medusozoans, understanding of the processes influencing egg size variation in the group under an evolutionary context is still limited. We carried out a comprehensive review of the variation of egg size in Medusozoa to test whether this variation is related to biological/sexual or environmental traits.

Eyes in Staurozoa (Cnidaria): a review.

The presence of dark pigment spots associated with primary tentacles (or structures derived from them, i.e., rhopalioids) in Staurozoa was recently overlooked in a study on the evolution of cnidarian eyes (defined as a "region made of photoreceptor cells adjacent to pigment cells", irrespective of image formation, i.