Tylokepon marianensis sp. n. Holotype female (UF 42220) (A–I). A Dorsal view B Pleon, dorsal view C Left antennae D Barbula, left side E Right maxilliped, external view F Left oostegite 1, external view G Left oostegite 1, internal view H Left pereopod 1 I Left pereopod 6. Allotype male (J–M) J Dorsal view K Ventral view L Left antenna M Left pereopod 4. Scale bars: 1.00 mm (A, B); 0.63 mm (D–G); 0.35 mm (H, I, L, M); 0.50 mm (J, K).