Aphanodactylidae

Ahyong, Shane T. & Ng, Peter K. L., 2009, Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms, Zootaxa 2289, pp. 33-47 : 35-36

Key to genera of the Aphanodactylidae

1. Maxilliped 3 merus triangular, inner distal angle produced to rounded lobe. Male abdomen with somites 4–6 fused. ......................................................................................................................................................................... Gustavus

- Maxilliped 3 merus subquadrate, inner distal angle angular. Male abdomen with all somites free ............................. 2

2. P2–5 meri length about 1.5 times propodus and carpus length combined. P5 merus shorter than half length of P4 merus .................................................................................................................................................................... Uruma

- P2–5 meri as long as or slightly longer than propodus and carpus length combined. P5 merus exceeding half length of P4 merus ................................................................................................................................................................... 3

3. Carapace of females transversely subquadrate; surface distinctly punctate. ..................................................... Gandoa

- Carapace of females transversely ovate; surface smooth, with few scattered pits ............................... Aphanodactylus