Samouelle, 1819
The abdomen of the male is divided into 6 (segments 5 and 6 fused together) or 7 segments. In males, the length of the second pleopod never exceeds that of the first; usually the second pleopod is very short but can sometimes extend beyond half of the length of the first. The abdomen is elongated and narrow, covering most of sternite 4 and with a locking mechanism; the genital openings are coxal or coxo-sternal. (Serène, 1984)
Subfamilies treated:
subfamily Galeninae A. Milne Edwards, 1862
subfamily Halimedinae Alcock, 1898
subfamily Heteropanopeinae Alcock, 1898
subfamily Heteropilumninae Serène, 1984
subfamily Pilumninae Samouelle, 1819
subfamily Planopilumninae Serène, 1984