Nudibranchs are members of the phylum Mollusca, and most species have a planktonic larval stage characterized by the presence of shells immediately after hatching. During development, larvae ...

The phylum Mollusca is highly diverse with myriad morphological, ecological, and behavioral adaptions spanning both terrestrial and aquatic environments. The most well-known groups ...

Nudibranchs are sea slugs. They are soft-bodied animals, and like clams, snails and squid, they are mollusks. Nudibranchs belong to phylum Mollusca, class Gastropoda, order Nudibranchia. Found in ...

Who came first – sponges or comb jellies? A new study reaffirms that sponges are the oldest animal phylum – and restores the classical view of early animal evolution, which recent molecular ...

The evolutionary history of colour and vision has been closely intertwined over the last 500 million years, leading to a dazzling diversity of colours and visual systems in the phylum Mollusca.

Figure 1: Holotype of Torquarator bullocki (Phylum Hemichordata, Class Enteropneusta). Diagnoses. Torquaratoridae fam. nov.: proboscis and collar each conspicuously broader from side-to-side than ...