Actaeodes mutatus Guinot 1976

Iwasa-Arai, Tammy, McCallum, Anna W. & Taylor, Joanne, 2015, Oceanic Shoals Commonwealth Marine Reserve survey reveals new records of xanthid crabs (Crustacea: Brachyura: Xanthidae) from northern Australia, Memoirs of Museum Victoria 73, pp. 1-11 : 2

Actaeodes mutatus Guinot 1976

( Figure 1A )

Actaea areolata Dana, 1852b: 162 .— Dana, 1855: pl. 8 fig. 1.—A.

Milne Edwards, 1865: 264 (not Actaeodes areolatus Dana, 1852a: 77 ). Actaea areolata? Miers, 1884: 209 .—Rathbun, 1924: 16. Actaeodes areolatus ; Guinot, 1967: 561.— Sakai, 1976: 449. Actaeodes mutatus Guinot, 1976: 247 .— Serène, 1984: 133 (key) 134 (key).— Morgan, 1990: 41.— Davie, 2002: 513.

Material examined. NMV J46921 , 1 female (Cb = 18.1 mm, Cl = 11.5 mm), northern Australia, Arafura Sea, Survey SS 2012t 07 Stn 12 (acq. 272), 10°57.76–57.79'S, 136°48.03–48.03'E, 60.6–62.8 m, benthic sled, 18 Oct 2012 .

Colour in preservative. Carapace reddish brown with orange granules on the lobes. Ambulatory legs brown with beige setae. Chelipeds reddish brown with orange granules on the lobes dorsally, and beige ventrally, fingers black. Abdomen brown with beige setae.

Remarks. Acteodes mutatus occurs across tropical Australia and the Indo-West Pacific. It is similar to Acteodes semoni (Ortmann, 1894) but can be distinguished by the basal antennal segment which fills the orbital hiatus that is normally open, whereas in A. semoni the basal antennal segment is excluded from the orbit. Another character used to define A. mutatus is the subdivision of 3M into three parts. In our specimen this subdivision is not well defined. However, it is likely this character is variable within the species.

Distribution. Indo-west Pacific (Mergui Archipelago, to southern Japan, and east to French Polynesia) ( Davie, 2002).

Figures

Figure 1. A, Actaeodes mutatus Guinot 1976, female, 18.1 X 11.5 mm (NMV J46921); B, Paractaea rufopunctata plumosa Guinot, in Sakai, 1976, male, 29.1 X 19.7 mm (NMV J46922); C, Euxanthus sp., male, 8.12 X 5.83 mm (NMV J46923); D, Liomera edwardsi Kossmann, 1877, male, 9.37 X 5.83 mm (NMV J46927); E, Liomera margaritata, male, 16.3 X 9.8 mm (NMV J46928); F, Atergatopsis granulata A. Milne Edwards, 1865, female, 19.6 X 12.9 mm (NMV J46929); G, Atergatopsis alcocki, male, 32.4 X 22.4 mm (NMV J46930); H, Lophozozymus dodone (Herbst, 1801), male, 16.7 X 10.4mm (NMV J46931). Photos: T. Iwasa-Arai.