1. Abe T (2006) Reproductive ecology of two Radulinopsis (Cottidae), showing copulation and female-egg-guardia. PhD thesis, Hokkaido University, Hokkaido, Japan
2. Abe T, Munehara H (2007) Histological structure of the male reproductive organs and spermatogenesis in a copulating sculpin, Radulinopsis taranetzi (Scorpaeniformes: Cottidae). Ichthyol Res 54:137–144
3. Abe T, Munehara H (2009) Adaptation and evolution of reproductive mode in copulating cottid species. In: Jamieson BGM (ed) Reproductive biology and phylogeny of fishes (agnathans and bony fishes). Vol 8, Part B of series: Reproductive biology and phylogeny. Science Publishers, Enfield (NH), pp 221–246
4. Bolin RL (1941) Embryonic and early larval stages of the cottid fish Orthonopias triacis Starks and Mann. Stanford Ichthyol Bull 2:73–82
5. Burns JR, Weitzman SH, Grier HJ, Menezes NA (1995) Internal fertilization, testis and sperm morphology in glandulocaudine fishes (Teleostei: Characidae: Glandulocaudinae). J Morphol 224:131–145