Question

Which one of the following animal phylum is latest by discovery?
1. Pogonophora
2. Kinorhyncha
3. Loricifera
4. Ctenophora

Answer 1

Correct Answer - Option 3 : Loricifera

The correct answer is Loricifera.

• The Loricifera is a microscopic, sediment-dwelling marine invertebrate, with a head covered in over 200 spines and an abdomen with a protective shell - known as a lorica.
  • Since it was first discovered in 1983, just under 40 species have been written about.
  • Loricifera typically inhabit the space between sand and mud particles in the ocean.

Pogonophora	The name Pogonophora is Greek for "beard-bearers". It is an obsolete animal phylum, now treated as part of the family Siboglinidae.
Kinorhyncha	It is a phylum of small (1 mm or less) marine invertebrates. It is also called mud dragons. They are widespread in mud or sand at all depths of the sea.
Ctenophora	They known as comb jellies, sea gooseberries, sea walnuts, or Venus's girdles, are voracious predators. Ctenophores are free-swimming, transparent, jelly-like, soft-bodied, marine animals having biradial symmetry, comb-like ciliary plates for locomotion.