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World Placozoa Database
Citable as data publication
Schierwater, B.; Eitel, M.; Osigus, H.-J.; DeSalle, R. (2024). World Placozoa Database. Accessed at on yyyy-mm-dd.

Access data
Dedicated website
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution 4.0 International License.

A world checklist of Placozoa, compiled by taxonomic experts and based on peer-reviewed literature. more

This is the smallest of all animal databases yet; it contains a single nominal species, Trichoplax adhaerens. A second species that is sometimes mentioned, Treptoplax reptans, has never been found again after its first and only report and is most likely a fragmented placozoan [2]. With only one species the phylum knows only three taxonomic ranks: Phylum (Placozoa), genus (Trichoplax), and species (T. adhaerens). This situation is soon to change radically. Genetic analyses have suggested that Placozoa harbor at least seven major species clades, which may represent different orders, each with multiple families.
The placozoan species database will be updated immediately when a relevant manuscript becomes accepted. Please send information to Bernd Schierwater.

Biology, Biology > Ecology - biodiversity
Marine/Coastal, Classification, Marine invertebrates, Species, Taxonomy, World Waters, Placozoa

Geographical coverage
World Waters [Marine Regions]

Temporal coverage
From 1758 on [In Progress]

Taxonomic coverage
Placozoa [WoRMS]


Schierwater, Bernddata managerdata creatortaxonomic editor
Eitel, Michaeldata creatortaxonomic editor
Osigus, Hans-Jürgendata creatortaxonomic editor
DeSalle, Robdata creator
Vlaams Instituut voor de Zee (VLIZ), moredatabase developer

Related datasets
Published in:
WoRMS: World Register of Marine Species, more

Dataset status: In Progress
Data type: Data
Data origin: Literature research
Metadatarecord created: 2012-07-16
Information last updated: 2024-01-31
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy