Cell fate specification modes shape transcriptome evolution in the highly conserved spiral cleavage.

Early animal development can be remarkably variable, influenced by lineage-specific reproductive strategies and adaptations. Yet, early embryogenesis is also strikingly conserved in certain groups, such as Spiralia. In this clade, a shared cleavage program (i.

Taxonomic review of from the Yellow Sea, China with the description of a new species (Nudibranchia, Doridina, Polyceridae).

Species of Bergh, 1880 are enigmatic Nudibranchia sea slugs, and only two valid species are reported in the northwestern Pacific. (Bergh, 1880) was initially described based on alcohol-fixed specimens. In the latest revision of , it was synonymized with (Cantraine, 1835).