In all 29 polycystine radiolarian species were obtained from surface seawater on May 28, 1999, using a plankton-net at one station (Site 990528; 26°37′18″N, 127°47′35″E) approximately 5 km northwest of Okinawa Island, Japan. In most polycystine radiolarians

Anomalously high relative abundances of the radiolarian Didymocyrtis tetrathalamus are found in deglacial sediments of the Cape Basin core RC13-228. These high abundances represent a unique kind of “no-analog” assemblage which are produced by sporadic

The mean growth, longevity and vitality (based on axopodial morphology and cytoplasmic flow) ofDidymocyrtis tetrathalamus tetrathalamus were assessed in laboratory culture in relation to variations in temperature, salinity and light. Maximum longevity

The mean growth, longevity and vitality (based on axopodial morphology and cytoplasmic flow) ofDidymocyrtis tetrathalamus tetrathalamus were assessed in laboratory culture in relation to variations in temperature, salinity and light. Maximum longevity