Sadayoshia tenuirostris Macpherson and Baba, 2010
Sadayoshia acroporae Baba, 1979: 644 (Marsegu Island, Moluccas, subtidal) (not S. acroporae Baba, 1972).
Sadayoshia 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 Ga7221.
Solomon Islands.
From the Latin, tenuis, thin, and rostrum, in reference to the shape of the rostrum.
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 as long as palm (0.7–1.2). 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, 2.0–6.4 mm; females, 2.1–9.1 mm; ovigerous females from 2.8 mm.
Japan (Ryukyu Islands), Indonesia (Moluccas, Kei islands, Banda Sea), South China Sea, Solomon Islands, Vanuatu, New Caledonia, Loyalty Islands, Chesterfield Islands.
On corals, Halimeda flat, on Seriatopora hystrix. Depths between 1 and 217 m.