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Fig. 6 in A Distant Record of the Cavernicolous Land Crab, Discoplax gracilipes (Crustacea: Decapoda: Gecarcinidae) from Japan

Fig. 6. Orbital regions of species of the family Gecarcinidae in Japan. A, Gecarcoidea lalandii, RUMF-ZC-8137, male (73.7 × 54.6 mm); B, Cardisoma carnifex, RUMF-ZC-3710, male (53.5 × 45.0 mm); C, Epigrapsus politus, RUMF-ZC-1342, male (19.6 × 15.6 mm); D, Epigrapsus notatus, RUMF-ZC-4028, male (31.0 × 25.3 mm); E, Tuerkayana hirtipes, RUMF-ZC-4721, female (50.2 × 41.3 mm); F, Tuerkayana rotundum, RUMF-ZC-4004, female (52.2 × 40.2 mm). Abbreviations: EOA, external orbital angle; IFS, inferior sinus; PS, pterygostomial region; SC, suborbital crista; SM, suborbital margin; SO, suborbital region.

Fig. 5. Relationships between carapace length and P4 in A Distant Record of the Cavernicolous Land Crab, Discoplax gracilipes (Crustacea: Decapoda: Gecarcinidae) from Japan

Fig. 5. Relationships between carapace length and P4 (A) merus, (B) carpus, and (C) propodus lengths for three Discoplax species. Symbols: closed, males; open, females; stars and circles, D. gracilipes from Japan and Philippines, respectively; triangles, D. longipes; squares, D. michalis.

Fig. 3 in A Distant Record of the Cavernicolous Land Crab, Discoplax gracilipes (Crustacea: Decapoda: Gecarcinidae) from Japan

Fig. 3. Orbital region and left cheliped of Discoplax gracilipes, RUMF-ZC-5727, male (36.1 × 31.7 mm). Abbreviations: EOA, external orbital angle; PS, pterygostomial region; SC, suborbital crista; SO, suborbital region. Arrowhead indicates plectrum of stridulatory mechanism.

Fig. 2 in A Distant Record of the Cavernicolous Land Crab, Discoplax gracilipes (Crustacea: Decapoda: Gecarcinidae) from Japan

Fig. 2. Discoplax gracilipes from Hateruma Island, Japan, RUMF-ZC 5727, male (36.1 × 31.7 mm). A, Dorsal view; B, ventral view.

Fig. 1 in A Distant Record of the Cavernicolous Land Crab, Discoplax gracilipes (Crustacea: Decapoda: Gecarcinidae) from Japan

Fig. 1. Distribution map of Discoplax gracilipes (star, from Japan; circles, from Philippines), D. longipes (triangles), and D. michalis (square). Symbols with black margin indicate records with mitochondrial DNA sequences; symbols without margin indicate records based on both presently observed specimens and previous studies. Type locality of each species is shown with underbars.

Fig. 4 in A Distant Record of the Cavernicolous Land Crab, Discoplax gracilipes (Crustacea: Decapoda: Gecarcinidae) from Japan

Fig. 4. Male left first gonopods (G1s) of three Discoplax species. A–D, Discoplax gracilipes, Hateruma, Japan (A, B: RUMF-ZC-5727, 36.1 × 31.7 mm), and Libaong, Philippines (C, D: ZRC 2001.2302, 35.8 × 30.9 mm); E, F, D. longipes, Lifou Island (ZRC 2001.1150, 43.6 × 38.5 mm); G, H, D. michalis (RUMF-ZC-1329, 50.9 × 43.3 mm). A, C, E, F, Ventral view; B, D, F, H, dorsal view. Setae of all G1s were partially removed.

Fig. 9. Discoplax aff. hirtipes from Christmas Island. A in The Blue Crab Of Christmas Island, Discoplax Celeste, New Species (Crustacea: Decapoda: Brachyura: Gecarcinidae)

Fig. 9. Discoplax aff. hirtipes from Christmas Island. A, probably male, ca. 80 mm carapace width (not collected), Waterfall Bay (Photograph by: H. H. Tan, 2007); B, female (47.1 × 39.7 mm) (ZRC 2012.0003), station CI 16.

Fig. 7. G1s. A–E in The Blue Crab Of Christmas Island, Discoplax Celeste, New Species (Crustacea: Decapoda: Brachyura: Gecarcinidae)

Fig. 7. G1s. A–E, Discoplax hirtipes (Dana, 1851), neotype male (64.2 × 53.0 mm) (ZRC 2010.0415), Suva, Fiji; F–J, D. celeste, new species, holotype male (106.0 × 83.6 mm) (QMW-29123 ex ZRC 2011.0168), Waterfall Bay, Christmas Island.

Fig. 5 in The Blue Crab Of Christmas Island, Discoplax Celeste, New Species (Crustacea: Decapoda: Brachyura: Gecarcinidae)

Fig. 5. Discoplax hirtipes (Dana, 1851) s. str. A, neotype male (64.2 × 53.0 mm) (ZRC 2010.0415), Suva, Fiji; B, C, male (93.5 × 73.4 mm) (ZRC 2001.2230), Pago Bay, Guam. A, B, dorsal overall views; C, frontal view of carapace.

Fig. 3 in The Blue Crab Of Christmas Island, Discoplax Celeste, New Species (Crustacea: Decapoda: Brachyura: Gecarcinidae)

Fig. 3. Discoplax celeste, new species. Holotype male (106.0 × 83.6 mm) (QMW-29123), Waterfall Bay, Christmas Island. A, dorsal view; B, frontal view of carapace; C, outer view of chelae.

Fig. 1 in The Blue Crab Of Christmas Island, Discoplax Celeste, New Species (Crustacea: Decapoda: Brachyura: Gecarcinidae)

Fig. 1. Discoplax celeste, new species. Colour in life. Holotype male (106.0 × 83.6 mm) (QMW-29123), Waterfall Bay, Christmas Island. A, dorsal view; B, frontal view.

Fig. 6. Male abdomens and anterior thoracic sternums. A in The Blue Crab Of Christmas Island, Discoplax Celeste, New Species (Crustacea: Decapoda: Brachyura: Gecarcinidae)

Fig. 6. Male abdomens and anterior thoracic sternums. A, Discoplax hirtipes (Dana, 1851), neotype male (64.2 × 53.0 mm) (ZRC 2010.0415), Suva, Fiji; B, D. hirtipes (Dana, 1851), male (73.5 × 58.4 mm) (ZRC 2001.0706), Merizo Bay, Guam; C, D. celeste, new species, paratype male (52.0 × 44.0 mm) (ZRC 2012.0027), station CI 11, Hosnie's Spring, Christmas Island; D, D. celeste, new species, holotype male (106.0 × 83.6 mm) (QMW-29123), Waterfall Bay, Christmas Island.

Fig. 4. Discoplax celeste, new species. A in The Blue Crab Of Christmas Island, Discoplax Celeste, New Species (Crustacea: Decapoda: Brachyura: Gecarcinidae)

Fig. 4. Discoplax celeste, new species. A, paratype male (52.0 × 44.0 mm) (ZRC 2012.0027), station CI 11, Waterfall Bay, Christmas Island; B, paratype male (84.3 × 65.7 mm) (ZRC 2011.0166), Waterfall Bay, Christmas Island.

Fig. 8 in The Blue Crab Of Christmas Island, Discoplax Celeste, New Species (Crustacea: Decapoda: Brachyura: Gecarcinidae)

Fig. 8. Top, Discoplax celeste, new species; bottom, Discoplax aff. hirtipes. Waterfall Bay, Christmas Island (specimens not collected), all ca. 80 mm carapace width (Photograph by: H. H. Tan, 2007).

Fig. 2. Discoplax celeste, new species. Colour changes with size. A in The Blue Crab Of Christmas Island, Discoplax Celeste, New Species (Crustacea: Decapoda: Brachyura: Gecarcinidae)

Fig. 2. Discoplax celeste, new species. Colour changes with size. A, juvenile (7.9 × 7.1 mm) (ZRC 2012.0028a); B, female (15.9 × 14.1 mm) (ZRC 2012.0028b); C, female (22.3 × 19.0 mm) (ZRC 2012.0028c); D, female (27.5 × 23.5 mm) (ZRC 2012.0028d); E, female (39.0 × 34.0 mm) (ZRC 2012.0028e); F, male (44.4 × 38.7 mm) (ZRC 2012.0028f); G, female (42.4 × 35.8 mm) (ZRC 2012.0018a); H, female (47.1 × 39.2 mm) (ZRC 2012.0018b). A–F from station CI 32, Hugh's Dale, Christmas Island; G, H, from station CI 23, Waterfall Bay, Christmas Island.

FIGURE 17. A in The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae)

FIGURE 17. A Bayesian inference (BI) tree of the genus Discoplax from the Indo-West Pacific region and the sister genus Cardisoma spp., based on the combined 16S rDNA and cytochrome oxidase subunit I genes (COI). Probability values at the nodes represent support values for BI, maximum likelihood (ML) and maximum parsimony (MP).

FIGURE 16. Discoplax species, left G1s in The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae)

FIGURE 16. Discoplax species, left G1s (denuded). A, B, D. longipes A. Milne-Edwards, 1867, male (43.3 × 37.7 mm) (ZRC 2001.1150), Loyalty Islands; C, D, D. michalis n. sp., paratype male (41.8 × 36.0 mm) (ZRC 2001.0701), Guam.

FIGURE 13. Discoplax longipes A in The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae)

FIGURE 13. Discoplax longipes A. Milne-Edwards, 1867, left G1, male (74.9 × 62.6 mm) (UF 2194), Niue. A–C, E, F, ventral views; D, G, H, dorsal views. E–H, distal parts of G1; B–H, denuded.

FIGURE 12. Discoplax longipes A in The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae)

FIGURE 12. Discoplax longipes A. Milne-Edwards, 1867, right G1 (laterally transposed to facilitate comparisons, denuded); male (68.9 × 61.3 mm) (SMF 4293), Makatea, French Polynesia. A–C, F, G, ventral views (photographed at different angles); D, E, H, I, dorsal views (photographed at different angles); F–I, distal parts of G1.

FIGURE 7 in The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae)

FIGURE 7. Discoplax species, frontal views of carapaces. A, D. longipes A. Milne-Edwards, 1867, male (68.2 × 57.4 mm) (ZRC 2002.0050), Loyalty Islands; B, D. longipes A. Milne-Edwards, 1867, male (43.3 × 37.7 mm) (ZRC 2001.1150), Loyalty Islands; C, D. longipes A. Milne-Edwards, 1867, male (68.9 × 61.3 mm) (SMF 4293), Makatea, French Polynesia; D, D. longipes A. Milne-Edwards, 1867, male (65.0 × 55.7 mm) (SMF 5849), Makatea, French Polynesia; E, D. longipes A. Milne- Edwards, 1867, male (57.0 × 50.2 mm) (SMF 6680), Niue; F, D. longipes A. Milne-Edwards, 1867, male (54.0 × 47.0 mm) (SMF 6680), Niue; G, D. michalis n. sp., paratype male (68.3 × 60.0 mm) (ZRC 2000.0571), Guam; H, D. michalis n. sp., paratype male (41.8 × 36.0 mm) (ZRC 2001.0701), Guam.