Image of Trichoplax adhaerens Image credits: Wikimedia

Dataset information

Source Najle et al., 2023
Processed 13 August 2026
Last update 17 August 2026

Metadata

NCBI Taxonomy 10228
Division Invertebrates
Cellular root cellular organisms
Domain Eukaryota
Clade Opisthokonta
Kingdom Metazoa
Clade Eumetazoa
Phylum Placozoa
Class Uniplacotomia
Order Trichoplacea
Family Trichoplacidae
Genus Trichoplax

Trichoplax adhaerens (H1 strain)

Trichoplax is a genus placed in the phylum Placozoa. The species Trichoplax adhaerens is one of four Placozoa species, alongside Hoilungia hongkongensis, Polyplacotoma mediterranea and Cladtertia collaboinventa. Placozoa is a basal group of multicellular animals, possible relatives of Cnidaria. Trichoplax are very flat organisms commonly less than 4 mm in diameter, lacking any organs or internal structures. They have two cellular layers: the top epitheloid layer is made of ciliated "cover cells" flattened toward the outside of the organism, and the bottom layer is made up of cylinder cells that possess cilia used in locomotion, and gland cells that lack cilia. Between these layers is the fibre syncytium, a liquid-filled cavity strutted open by star-like fibres. Wikipedia

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