Heteromysoides songkhlaensis sp. nov. Paratype, male (BL 3.6 mm, A–I) (ZRC 2019.1095). A. Right first thoracopod; B. Right first thoracopodal endopod enlarged; C. Right second thoracopod; D. Carpopropodus, dactylus and setae enlarged; E. Right third thoracopod; F. Distal part of carpopropodus, dactylus and setae enlarged; G. Right fourth thoracopod; H. Distal part of carpopropodus, dactylus and setae enlarged; I. Left fifth thoracopod. Scale bar: 0.2 mm (A, C, E, G, I); 0.1 mm (B, D, F, H).