Paracomitas undosa is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.

The sculpture consists of numerous, very irregular, spiral striae, more conspicuous at the base of shell and siphonal canal, scarcely traceable in the excavation.

The aperture is oblong, angular above, ending below in a rather long, broad siphonal canal, slightly directed to the left The peristome is broken, but according to growth lines shows a deep sinus at the suture, then is strongly protracted.

The columellar margin is regularly curved, with a thin layer of enamel, slightly contorted along the siphonal canal.

[2] This marine species occurs in the Flores Sea and the Molucca Passage, Indonesia