Description 

A grey shrimp with conspicuous dark and pale bands on the abdomen. 

The carapace is very uniform in contrast to the abdomen. Viewed from above there are two indistinct dark grey bands. These extend onto the side as diagonal markings enclosing an indistinct epaulette. There are no lines that continue horizontally into the abdominal pattern. 

The segments of the abdomen are separated by narrow black bands. In the middle of each segment, there are alternating contrasting grey and white lines which are very distinctive. There is a distinct black spot on the side of the 4^th segment. 

The rostrum and antennae are grey. 

The chelae are grey with two or three distinct dark grey-brown bands. 

The chelate second legs are red-tinged grey with pale joints. 

The walking legs are red-tinged grey with darker bands on either side of the yellow joints. 

The tail fan is grey with brown centred scutes and usually has white setae. 

Similar Shrimps

Perhaps the easiest to confuse is the Titan Shrimp but that has a strongly longitudinal pattern of well-defined stripes from carapace to tail whereas the fragmented pattern of the Mottled Spottail Shrimp is transverse. 

Nomenclature. 

Undescribed species, no records apart from ours from Australia and the Solomon Islands.