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FIGURE 7 in First stage zoeal morphology of four ghost crabs Ocypode ceratophthalmus (Pallas, 1772), O. cordimanus Latreille, 1818, O. sinensis Dai, Song & Yang, 1985 and O. stimpsoni Ortmann, 1897 (Crustacea, Decapoda, Ocypodidae)

FIGURE 7. Scanning electron microscope on the first zoeal stage of Ocypode sinensis; A, lateral view; B, frontal foramen; C, dorsal spine; D, E, ventral carapace; F, dorsal view of telson; G, part of telson showing minute lateral spine; H, part of telson furca.

FIGURE 1 in First stage zoeal morphology of four ghost crabs Ocypode ceratophthalmus (Pallas, 1772), O. cordimanus Latreille, 1818, O. sinensis Dai, Song & Yang, 1985 and O. stimpsoni Ortmann, 1897 (Crustacea, Decapoda, Ocypodidae)

FIGURE 1. Ocypode ceratophthalmus first zoeal stage; A, carapace; B, antennule; C, antenna; D, mandible; E, maxillule; F, maxilla; G, first maxilliped; H, second maxilliped; I, dorsal view of abdomen; J, lateral view of abdomen.

FIGURE 4 in First stage zoeal morphology of four ghost crabs Ocypode ceratophthalmus (Pallas, 1772), O. cordimanus Latreille, 1818, O. sinensis Dai, Song & Yang, 1985 and O. stimpsoni Ortmann, 1897 (Crustacea, Decapoda, Ocypodidae)

FIGURE 4. Ocypode stimpsoni first zoeal stage; A, carapace; B, antennule; C, antenna; D, mandible; E, maxillule; F, maxilla; G, first maxilliped; H, second maxilliped; I, dorsal view of abdomen; J, lateral view of abdomen.

FIGURE 3 in First stage zoeal morphology of four ghost crabs Ocypode ceratophthalmus (Pallas, 1772), O. cordimanus Latreille, 1818, O. sinensis Dai, Song & Yang, 1985 and O. stimpsoni Ortmann, 1897 (Crustacea, Decapoda, Ocypodidae)

FIGURE 3. Ocypode sinensis first zoeal stage; A, carapace; B, antennule; C, antenna; D, mandible; E, maxillule; F, maxilla; G, first maxilliped; H, second maxilliped; I, dorsal view of abdomen; J, lateral view of abdomen.

Figure 3 in Across-shore distribution of Ocypode quadrata burrows in relation to beach features and human disturbance

Figure 3. Linear regression fitting for the across-shore distribution of ghost crabs by size. Dashed lines represents ±95% confidence intervals. Note that x axes are not the same for the three beaches.

Figure 5 in Across-shore distribution of Ocypode quadrata burrows in relation to beach features and human disturbance

Figure 5. Temporal variations (mean ± SE) of the ghost crab habitat envelope at the three studied beaches.

Figure 4 in Across-shore distribution of Ocypode quadrata burrows in relation to beach features and human disturbance

Figure 4. Temporal variations of the first burrow location (mean ± SE) at the three studied beaches.

Figure 2 in Across-shore distribution of Ocypode quadrata burrows in relation to beach features and human disturbance

Figure 2. Across-shore distribution of ghost crab density fitted using polynomial models. Dashed lines represents ±95% confidence intervals. Note that x and y axes are not the same for the three beaches.

Figure 1 in Across-shore distribution of Ocypode quadrata burrows in relation to beach features and human disturbance

Figure 1. Location and Google Earth images of study sites. Map data: Google, Digital Globe and INEGI.

FIGURE 4. A in Comparative morphology of the seminal receptacles of Ocypode quadrata (Fabricius, 1787) (Brachyura, Ocypodoidea)

FIGURE 4. A: Microscopic view of the vagina of Ocypode quadrata. Scale bar: 50 µm. B: Detail of the vagina showing the presence of spermatophores in the lumen. Scale bar: 100 µm. CL: cuticular layer, MP: muscular packets, SPF: spermatophores, VL: vaginal lumen.

FIGURE 2 in Comparative morphology of the seminal receptacles of Ocypode quadrata (Fabricius, 1787) (Brachyura, Ocypodoidea)

FIGURE 2. Microscopic view of the seminal receptacles of Ocypode quadrata. A: Detail of the mesodermic wall showing the secretor epithelium, muscular layer and the conjunctive tissue. Scale bar: 50 µm. B: Detail of a fold in the mesodermic epithelium. Scale bar: 50 µm. C: General view of the meso-ectodermic transition with the presence a high folds. Scale bar: 100 µm. D: Detail of the ectodermic fold showing the stratified epithelium, the muscular layer and the cuticular layer Scale bar: 50 µm. CL: cuticular layer, CT: conjunctive tissue, EC: ectodermic fold, EST: ectodermic stratified epithelium, MF: mesodermic fold, ML: muscular layer, MSE: mesodermic secretor epithelium, SPZ: spermatozoa. The zone of the meso-ectodermic epithelium transition in indicated by an arrow. Stained with HE.

FIGURE 1. A in Comparative morphology of the seminal receptacles of Ocypode quadrata (Fabricius, 1787) (Brachyura, Ocypodoidea)

FIGURE 1. A Macroscopic view of the seminal receptacles of Ocypode quadrata. B. Schematic drawing of the seminal receptacle and its anatomical relation with the ovary, oviduct, vagina and gonopore. Scale bar: 5mm. EZ: ectodermic zone of the seminal receptacles, MZ: mesodermic zone of the seminal receptacles, SR: seminal receptacle, OV: ovary, OVI: oviduct, V: vagina, VU: vulva.

FIGURE 3. A in Comparative morphology of the seminal receptacles of Ocypode quadrata (Fabricius, 1787) (Brachyura, Ocypodoidea)

FIGURE 3. A: General view of spermatozoa within the seminal receptacles of Ocypode quadrata. Scale bar: 100 µm. Stained with PAS. B. Detail of the spermatozoa within the matrix. Scale bar: 20 µm. Stained with Toluidine blue. EST: ectodermic stratified epithelium, M: matrix, MSE: mesodermic secretor epithelium, SPZ: spermatozoa.