Outer margin of antennal scale naked. Male pleopods without modified setae. Pseudobranchiae of male 2nd to 4th pleopods spirally coiled. Exopod of uropods shorter than endopod. Lateral margin of telson with 2 strong spines in basal part.
Ref.: Coifmann (1937), Ii (1964).
Kingdom Animalia Phylum Crustacea Superorder Peracarida Order Mysidacea Suborder Mysida Family Petalophthalmidae Genus Siriella Species Siriella thompsoni
