Calappa exanthematosa Alcock & Anderson, 1894, as a valid species of box crab from the Indian Ocean (Crustacea: Decapoda: Calappidae) Author Ng, Peter K. L. Author Lai, Joelle C. Y. Author Ghotbeddin, Negar Author Safaie, Mohsen text Zootaxa 2011 3042 1 14 journal article 46272 10.5281/zenodo.201406 d90df0d7-6a7e-4d2e-979d-53681d0f44a0 1175-5326 201406

TABLE 1. Differences between Calappa japonica and C. exanthematosa.

	Calappa japonica	Calappa exanthematos a
Colour in life	Maroon spots on posterior half of carapace connected with each other to varying degrees, forming reticulated appearance (Fig. 3A, B)	Maroon spots on posterior half of carapace independent, demarcated by cream area around each, not connected, area appears distinctly spotted (Fig. 2)
Carapace	Dorsal surface appears swollen (Figs. 3A, B, 5A)	Dorsal surface relatively more swollen (Figs. 1, 2, 4, 5B)
Lateral teeth of carapace	Relatively more elongate in adults, with tip gently curved upwards (Figs. 3A, B, 5A)	Evenly triangular in adults, with tip level with rest of tooth (Figs. 1, 2, 4, 5B)
Longitudinal gastro-cardiac grooves	Spaced relatively wide apart (Fig. 5A)	Spaced relatively close (Fig. 5B)
Posterior regions of cara- pace	May have scattered tubercles and granules but not forming any distinct transverse groove of any sort (Fig. 5A)	Distinct uneven row of tubercles present behind posterior margin of carapace, forming shallow but distinct transverse groove which is lined by small granules (Fig. 5B)
Pterygostomian lobe	Inner oblique longitudinal groove relatively broad (Fig. 6A)	Inner oblique longitudinal groove relatively nar- row (Fig. 6B)
Chelae	Ventral surface of manus with scattered rounded granules and tubercles; ventral mar- gin lined with numerous closely packed rounded granules (Fig. 7A)	Ventral surface of manus with relatively more prominent scattered rounded granules and tubercles; ventral margin lined with numerous granules which are spaced further apart (Fig. 7B)
Male thoracic sternites 4–6	Relatively higher, narrower (Fig. 8A)	Relatively lower, broader (Fig. 8C)
Median tubercles on abdominal somites 2–4	Relatively high, distinct (Fig. 8A)	Relatively low, flat (Fig. 8C)
Male abdominal somite 6	Squarish (Fig. 8A, B)	Rectangular, broader than long (Fig. 8C, D)
Male telson	Evenly triangular (Fig. 8A, B)	Relatively more elongate with distal third taper- ing sharply (Fig. 8C, D)
G1	Gently curved, weakly C-shaped; tip taper- ing (Fig. 9A–C)	More strongly curved, distinctly C-shaped; tip subtruncate to gently rounded (Fig. 9D–F)