@article{oai:u-ryukyu.repo.nii.ac.jp:02006997,
 author = {Nohara, Tomohide and 野原, 友秀},
 issue = {12},
 journal = {琉球大学理工学部紀要. 理学編, Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences},
 month = {Apr},
 note = {Several species of ostracodes such as Perprimitia aff. P. tenera, Bythocypris aff. B. disparilis, Monoceratina sp., Healdia cf. H. ovoidea, Aechminella aff. trispinosa, Amphissites rugosus, and Perprimitia (?) morganensis n. sp. were studied from point of growth series and sexual dimorphism. Amphissites rugosus, Monoceratina sp., and Healdia cf. H. ovoidea each show four, three, and two possible molt stages of instars. However, Aechminella aff. trispinosa, Perprimitia? aff. P. tenera, and Bythocypris aff. B. disparilis do not show clear molt stages. The study indicates that Perprimitia (?) morganensis n. sp. is sexually dimorphic., 紀要論文},
 pages = {61--65},
 title = {Paleontological Notes on Growth Series and Sexual Dimorphism of Some Mississippian Ostracodes from Utah, U.S.A.},
 year = {1969}
}