Ascidiacea, the ascidians or sea squirts, is a class of sac like marine filter feeding invertebrates in the subphylum Tunicata, now regarded as paraphyletic rather than a single natural lineage. They are distinguished by a tough outer covering called the tunic, made of the polysaccharide cellulose, and they feed by filtering particles from the surrounding seawater.
Facts
Taxonomic Rank Member Count Band Era First Appeared Classification
Living or Extinct Sources
1. Wikidata (taxon extant/extinct status)
Wikimedia Foundation / Wikidata contributorsQ190090, descriptionView the Source 2. Wikipedia: Ascidiacea
- Taxonomic rank (Wikipedia confirms the entity; rank from slug/structure-wave classification)
In Group: Hemichordate and Tunicate Classes, Lead
Ascidiacea, commonly known as the ascidians or sea squirts, is a paraphyletic class (biology) in the subphylum Tunicata of sac-like marine (ocean) invertebrate filter feeders.
View the Source3. Catalogue of Life (ChecklistBank): Taxon metrics for Ascidiacea
Catalogue of Life (ChecklistBank)Taxon metrics, speciesExtantCountQuote, Taxon metrics, speciesExtantCount
"speciesExtantCount": 3000
4. Paleobiology Database: Taxon record for Ascidiacea
Paleobiology DatabaseTaxon record, first appearance (firstapp_max_ma, early_interval)Quote, Taxon record, first appearance (firstapp_max_ma, early_interval)
"taxon_name": "Ascidiacea" ... "firstapp_max_ma": 274.4 ... "early_interval": "Roadian"
Wikidata: Ascidiacea
Wikidata Q190090, class allow-list match (w-wdresolver-0926)View the Source Reader Challenges (0)
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