Pseudocallisoma coecum (Holmes, 1908) (Amphipoda, Scopelocheiridae) and Lanceola clausi clausi Bovallius, 1885 (Amphipoda, Lanceolidae) associated with Poralia rufescens Vanhöffen, 1902 (Scyphozoa, Ulmaridae)

Abstract

Juvenile specimens of the scavenging amphipod Pseudocallisoma coecum (Holmes, 1908) were recorded near the bases of the oral arms of the jellyfish Poralia rufescens Vanhöffen, 1902 in the Japan Trench. Video footage and sampling imply a high infection rate of Poralia, with one to six amphipod specimens occurring on each P. rufescens individual. The hyperiidean amphipod Lanceola clausi clausi Bovallius, 1885 was also found to infect P. rufescens.