Sadayoshia inermis Macpherson and Baba, 2010
Sadayoshia acropora Baba, 1979: 644 (Marsegu Island, Moluccas, subtidal) (not S. acropora Baba, 1972).
Sadasyoshia edwardsii. -Fujita & Shokita, 2005: 866, figs. 1–10 (larvae).
Sadayoshia edwardsii. - Baba, 2005: 203, 307 (in part, only Banda Sea and Kei Islands material).
Holotype, male, MNHN Ga 7248.
Chesterfield Islands.
From the Latin, inermis, unarmed, in reference to the smooth lateral margin of the basal article of the antennular peduncle.
Carapace without spine mesial to anterolateral spine of carapace. Rostral spine without dorsal longitudinal carina. Basal antennular article without spine on lateral margin. Antennal article 3 unarmed. Peropod 1 fingers clearly longer than palm (1.4–1.9). Abdominal somites 2–4 with several transverse ridges in addition to anterior ridge. Abdominal somite 2 unarmed. Sternite 3 at most twice as broad as long.
Males, 2.0–8.7 mm; females, 1.5–6.1 mm; ovigerous females from 3.3 mm.
Solomon Islands, Vanuatu, New Caledonia, Loyalty Islands, Chesterfield Islands. Depths between 4 and 90 m.