taxonID	type	description	language	source
578CCEE845725897B4A42FE8550FC5F9.taxon	description	Figs 1, 2, 3, 4, 5, Suppl. material 1	en	Ziming, Yuan, Wei, Jiang, Zhongli, Sha (2025): A new species of Gaillardiellus Guinot, 1976 (Crustacea, Brachyura, Xanthidae) from the coral reefs of the South China Sea. ZooKeys 1234: 1-17, DOI: 10.3897/zookeys.1234.144026
578CCEE845725897B4A42FE8550FC5F9.taxon	diagnosis	Diagnosis. Carapace (Figs 1 A, B, 2 A, 3 A, B, 4 A, B) transversely oval, regions clearly defined, short setae present within grooves and between granules, long setae scattered between granules; front not protruding, slightly curved downwards, divided into 2 lobes by broad V-shaped notch; anterolateral margin divided into 4 granular lobes, first lobe small, slightly larger than outer orbital angle, adjacent to latter; posterolateral margin shorter than anterolateral margin, distinctly concave. Thoracic sternum (Figs 1 D, 3 D) with low granules, sternites 1 to 4 covered with soft setae. Male pleonite 6 (Figs 1 D, 2 B) with expanded lateral distal angles, wider than long; telson wider than long, terminal end blunt. G 1 (Fig. 2 F, G, J, K) curved outwards, distal third with small spines, long setae near distal end, terminal lobe slender. Orange-red to vibrant bright red in life (Fig. 5).	en	Ziming, Yuan, Wei, Jiang, Zhongli, Sha (2025): A new species of Gaillardiellus Guinot, 1976 (Crustacea, Brachyura, Xanthidae) from the coral reefs of the South China Sea. ZooKeys 1234: 1-17, DOI: 10.3897/zookeys.1234.144026
578CCEE845725897B4A42FE8550FC5F9.taxon	description	Description of male holotype. Carapace (Figs 1 A, B, 2 A) transversely oval, CW about 1.3 times CL, dorsal surface slightly elevated, regions clearly defined, covered with granules, grooves wide and deep; short setae present within grooves and between granules, long setae scattered between granules; regions 1 – 3 M distinct, 2 M completely divided into 2 lobes, 3 M intact, 4 M indistinct; regions 2 – 6 L distinct, 1 P distinct, 2 P indistinct; front about 0.3 times CW, not protruding, slightly curved downwards, divided into 2 lobes by broad V-shaped notch, inner lobes rounded and more prominent, outer lobes smaller and flatter, separated from inner orbital angle by notch; dorsal orbital margin with 2 sutures; eyestalks with setae and granules near cornea. Outer orbital angle not fused with anterolateral margin; anterolateral margin divided into 4 granular lobes, first lobe small, slightly larger than outer orbital angle, adjacent to latter, second and third lobes broader, fourth lobe smaller than third; posterolateral margin shorter than anterolateral margin, distinctly concave; subhepatic region with granules and short setae; pterygostomial region smooth with soft setae. Antennule (Fig. 1 C) folding transversely, antennular fossa subrectangular; basal segment of antenna subrectangular, filling orbital hiatus, antennal flagellum fitting into orbital hiatus. Epistome (Fig. 1 C) central region with a strong median projection on posterior margin. Third maxilliped merus subquadrate, with low granules, anterior margin slightly indented, outer distal angle slightly expanded; ischium subrectangular, with submedian groove. Chelipeds (Figs 1 E, 2 C) symmetrical, merus margins with low granules and soft setae; carpus robust, densely covered with granules and long setae, dorsolateral surface with grooves; palm densely covered with granules and setae on dorsal and lateral surfaces, ventral and medial surfaces smoother with low granules, dorsal surface with 2 granular tubercles; gap present when fingers closed; basal part of movable finger with granules, dorsal surface with 2 grooves, 3 – 5 rounded teeth between fingers, tips slightly concave. Ambulatory legs (Figs 1 A, 2 D) densely covered with setae and granules; merus concave near terminal end of dorsal margin; carpus with groove near anterior margin, slightly swollen near terminal end; propodus nearly rhomboid; dactylus almost as long as propodus, terminal end chitinous, long, and sharp, with underdeveloped dactylo-propodal lock. Thoracic sternum (Fig. 1 D) with low granules, sternites 1 to 4 covered with soft setae; sternites 1 and 2 fused, suture between sternites 2 and 3 straight, suture between sternites 3 and 4 visible at margins, extending as shallow groove towards center, slightly curving backwards, with sternite 4 partially covered by telson, central groove beneath telson; tubercle of sterno-pleonal lock (press-button mechanism) located on anterior margin of sternite 5. Pleon (Figs 1 D, 2 B) relatively short, pleonites 3 to 5 fused, fusion lines visible, margins concave and sinuous, fitting closely to corresponding part of thoracic sternum; pleonite 6 with expanded lateral distal angles, wider than long; telson (Figs 1 D, 2 B) wider than long, terminal end blunt, with long soft setae. G 1 (Fig. 2 F, G, J, K) curved outward, distal third with small spines, long setae near distal end, terminal lobe slender. G 2 (Fig. 2 H, I) about one-third length of G 1, curved outwards, terminal lobe longer and curved upwards.	en	Ziming, Yuan, Wei, Jiang, Zhongli, Sha (2025): A new species of Gaillardiellus Guinot, 1976 (Crustacea, Brachyura, Xanthidae) from the coral reefs of the South China Sea. ZooKeys 1234: 1-17, DOI: 10.3897/zookeys.1234.144026
578CCEE845725897B4A42FE8550FC5F9.taxon	etymology	Etymology. The new species is named after the fiery Stand “ Magician’s Red ” from the manga “ JoJo’s Bizarre Adventure ”, wielded by the character Muhammad Avdol. This name alludes to the species’ changing flame-like red coloration.	en	Ziming, Yuan, Wei, Jiang, Zhongli, Sha (2025): A new species of Gaillardiellus Guinot, 1976 (Crustacea, Brachyura, Xanthidae) from the coral reefs of the South China Sea. ZooKeys 1234: 1-17, DOI: 10.3897/zookeys.1234.144026
578CCEE845725897B4A42FE8550FC5F9.taxon	distribution	Geographic distribution. Xisha and Nansha Islands, South China Sea.	en	Ziming, Yuan, Wei, Jiang, Zhongli, Sha (2025): A new species of Gaillardiellus Guinot, 1976 (Crustacea, Brachyura, Xanthidae) from the coral reefs of the South China Sea. ZooKeys 1234: 1-17, DOI: 10.3897/zookeys.1234.144026
