FIGURE 5. Buccal cavity and third maxillipeds. A in Ankerius aenigmaticus, a new genus and new species of aphanodactylid crab symbiotic with polychaetes from the Red Sea coast of Saudi Arabia (Crustacea: Decapoda: Brachyura: Aphanodactylidae)

FIGURE 5. Buccal cavity and third maxillipeds. A, Selwynia laevis Borradaile, 1903, holotype male (7.1 × 5.6 mm) (CUMZ I. 63872), Hulule Atoll, Maldives, coll. J. S. Gardiner, 1900; B, Gandoa brevipes (H. Milne Edwards, 1853), female (7.2 × 5.0 mm) (ZSM 1277 / 1) [holotype of Voeltzkowia zanzibarensis Lenz, 1905], Kokotoni, Zanzibar, coll. July 1889; C, Gustavus mecognathus Ahyong & Ng, 2009, paratype female (13.9 × 8.0 mm) (ZRC 2010.0252), SW Cocos Barrier, Guam, near small pass on large terebellid worm, coll. G. Paulay, 20 March 2000; D, Ankerius aenigmaticus gen. et sp. nov., female holotype (7.2 × 7.0 mm) (UF), Red Sea coast of Saudi Arabia.