The current taxonomy version is ott3.6 (click for more information). See the OTT documentation for an explanation of the taxon flags used below, e.g., extinct
Ecdysozoa ncbi:1206794 (OTT id 611099)
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life > cellular organisms > Eukaryota > Opisthokonta > Holozoa > Metazoa > Eumetazoa > Bilateria > Protostomia