Sponges (also known as sea sponges), the members of the phylum Porifera (/pəˈrɪfərə/; meaning 'pore bearer'), are a basal animal clade as a sister of the...

class in the phylum Porifera. They include greater than 90% of all species of sponges with nearly 8,800 species worldwide (World Porifera Database). They...

the Porifera and ParaHoxozoa as sister of the Ctenophora. An alternative phylogeny is given by the Porifera-sister hypothesis in which Porifera are the...

Ctenopelta porifera is a species of sea snail, a marine gastropod mollusk in the family Peltospiridae. The length of the shell attains 10.6 mm. It is a...

The calcareous sponges (class Calcarea) are members of the animal phylum Porifera, the cellular sponges. They are characterized by spicules made of calcium...

Ctenophora and Porifera is debated. Some phylogenomic studies have presented evidence supporting Ctenophora as the sister to Parahoxozoa and Porifera as the sister...

are only partially differentiated. They generally group a single phylum, Porifera, which lack muscles, nerves and internal organs, which in many cases resembles...

relationships is indicated with dashed lines. The most basal animals, the Porifera, Ctenophora, Cnidaria, and Placozoa, have body plans that lack bilateral...

and crustaceans. The most familiar invertebrates include the Protozoa, Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Echinodermata, Mollusca...

Incertae sedis (Latin for 'of uncertain placement') or problematica is a term used for a taxonomic group where its broader relationships are unknown or...