Q.Name the phylum whose members, though once classified with the chordates, are today placed among the non-chordates.

Step 1. Hemichordates are small, worm-like, exclusively marine animals such as Balanoglossus and Saccoglossus.

Step 2. They were historically classified as a subphylum of Chordata because of certain superficial resemblances to chordate features. …

Recall which phylum's classification changed from 'chordate subphylum' to …

• Assuming the name 'Hemichordata' means it is still partly classified under Chordata — it is now treated as fully separate. …