1. Division of Paleontology (Invertebrates), American Museum of Natural History, New York.
2. Geological Survey of Hokkaido, Hokkaido Research Organization, Sapporo Japan.
3. Smithsonian Environmental Research Center, Edgewater, MD.
4. Earth and Environmental Sciences, University of Michigan, Ann Arbor.
5. Division of Natural History, Museum of Nature and Human Activities, Hyogo, Japan.