RUDOLOCULINA HOOPERI, A NEW MILIOLID WITH AN AGGLUTINATED OUTER SURFACE FROM THE NORTHEASTERN PACIFIC-OCEAN

Rudoloculina hooperi, a new miliolid from Holocene and modern shelf se diments of the northeastern Pacific Ocean, is characterized by chamber s that are quadrate in cross-section and by a test wall with embedded agglutinated grains, some of which consist of miliolid-type shell mate rial (subparallel calcite laths), The agglutinated grains are either c alcareous and low in magnesium (Mg/Ca less than or equal to 0.01) or s ilicic. Rudoloculina hooperi has previously been mistakenly reported f rom the same region as Quinqueloculina agglutinata Cushman, The morpho logically similar genus Cycloforina has been reported mostly from warm er waters, suggesting that R, hooperi is near the northern limit of it s range in the Gulf of Alaska.