A new species of from Shinkai Seep Field, Mariana Trench (Crustacea, Amphipoda, Pardaliscidae).

A new pardaliscid amphipod, , is described from a single female captured at the Shinkai Seep Field, Mariana Trench, from a depth of 5,689-5,683 m. A key to species of is provided. This is the first species of to be described from the Mariana Trench, and the second report of this genus from this region.

A new species of from the Bering Sea (Crustacea, Amphipoda, Pardaliscidae), with a redescription of .

A new pardaliscid amphipod, , is described from the Bering Sea at depths between 520 and 536 m, and Bruzelius, 1859 is redescribed based on specimens from Fredrikshald, Norway, near the species' type locality. Nucleotide sequences of mitochondrial cytochrome oxidase subunit I (COI) from the holotype and a paratype of are reported. While is similar to , it differs from the latter in having an asetose palp article 1 of maxilla 1, a gnathopod 1 coxa with a straight distal edge, and in the posterior margin of the basis of gnathopods 1 and 2, and pereopod 3, being heavily setose in females.

A new species of (Copepoda, Calanoida) from the Philippines, based on morphological and molecular analyses.

A new species of Acartia (Odontacartia), A. (O.) edentata, was collected from Leyte Island in the Philippines.