Genus Ilyodromus Sars, 1894
Superfamily: Cypridoidea Baird, 1845
Family: Cyprididae Baird, 1845
Subfamily: Herpetocypridinae Kaufmann, 1900
1. Ilyodromus intermedius Okubo, 2011 in Smith et al. 2011 
Left side view of a female Ilyodromus intermedius, length 1.1mm.
External view of a female left valve of Ilyodromus intermedius, length 1153 microns.
External view of a female right valve of Ilyodromus intermedius, length 1115 microns.
- Additional figures in: Okubo & Ida 1989; Okubo 1990; Okubo 2004; Smith et al. 2011.
- Habitat: Rice fields, and Lake Biwa, along the lakeshore and down to a depth of 4.6 m.
- Mode of life: Benthic.
- Reproduction mode: Asexual, males unknown.
- Known distribution: Shiga Prefecture (Okubo 2004; Smith et al. 2011); Gumma Prefecture (Okubo & Ida 1989, as Ilyodromus smaragdinus); Okayama (Okubo 1990 as Ilyodromus smaragdinus).
- References:
- ⚬ Okubo, I. 1990. Sixteen species of freshwater Ostracoda from Japan. Bulletin of the Biogeographical Society of Japan, 45, 39-50.
- ⚬ Okubo, I. 2004. Nihon tansui san kaimijinko rui ni tsuite. Kabushikigaisha Sanmon Insatsusho, Okayama, Japan, 72pp. [In Japanese, privately published].
- ⚬ Okubo, I. & Ida, K. 1989. Freshwater Ostracoda from Gunma Prefecture, Japan. Bulletin of the Biogeographical Society of Japan, 44, 105-107. [In Japanese]
- ⚬ Smith, R. J., Janz, H. & Okubo, I. 2011. Recent Cyprididae and Ilyocyprididae (Crustacea: Ostracoda) from Lake Biwa, Japan, including a summary of the lake's ostracod fauna. Zootaxa, 2874, 1-37.