Nakano, Takafumi. 2011. “Redescription of Orobdella Ijimai (Hirudinida: Arhynchobdellida: Gastrostomobdellidae), and Two New Species of Orobdella From the Ryukyu Archipelago, Japan”. Zootaxa 2998 (1). Auckland, New Zealand:1–15. https://doi.org/10.11646/zootaxa.2998.1.1.