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FIGURE 5. Nanhaipotamon aureomarginatum n in Two new freshwater crab species of the genus Nanhaipotamon Bott, 1968 (Crustacea, Decapoda, Potamidae) from Huizhou, Guangdong Province, southern China

FIGURE 5. Nanhaipotamon aureomarginatum n. sp.: male holotype (37.7 × 30.7 mm), SYSBM 001807 (A–D); female paratype (33.9 × 28.4 mm), SYSBM 001808 (E, F). (A) cephalothorax, frontal view; (B) anterior thoracic sternum; (C) thoracic sternum, pleonites III–VI and telson; (D) sterno-pleonal cavity with G1 in situ, ventral view; (E) pleonites III–VI and telson; (F) sternum showing vulvae.

FIGURE 3. Nanhaipotamon incendium n in Two new freshwater crab species of the genus Nanhaipotamon Bott, 1968 (Crustacea, Decapoda, Potamidae) from Huizhou, Guangdong Province, southern China

FIGURE 3. Nanhaipotamon incendium n. sp.: male holotype (31.3 × 25.0 mm), SYSBM 001799 (A–C, F, G); male paratype (27.0 × 21.6 mm), SYSBM 001801 (D); male paratype (25.4 × 20.5 mm), SYSBM 001803 (E); female paratype (32.0 × 25.0 mm), SYSBM 001800 (H, I). (A) left maxilliped III; (B) left G2, ventral view; (C–E) left G1, ventral view; (F, H) major cheliped; (G, I) minor cheliped. Scale bars: A–E = 1.0 mm; F–I = 5.0 mm.

FIGURE 2. Nanhaipotamon incendium n in Two new freshwater crab species of the genus Nanhaipotamon Bott, 1968 (Crustacea, Decapoda, Potamidae) from Huizhou, Guangdong Province, southern China

FIGURE 2. Nanhaipotamon incendium n. sp.: male holotype (31.3 × 25.0 mm), SYSBM 001799 (A–D); female paratype (32.0 × 25.0 mm), SYSBM 001800 (E, F). (A) cephalothorax, frontal view; (B) anterior thoracic sternum; (C) thoracic sternum, pleonites III–VI and telson; (D) sterno-pleonal cavity with G1 in situ, ventral view; (E) pleonites III–VI and telson; (F) sternum showing vulvae.

FIGURE 1 in Two new freshwater crab species of the genus Nanhaipotamon Bott, 1968 (Crustacea, Decapoda, Potamidae) from Huizhou, Guangdong Province, southern China

FIGURE 1. Dorsal habitus of Nanhaipotamon incendium n. sp. (A) male holotype (31.3 × 25.0 mm), SYSBM 001799; (B) female paratype (32.0 × 25.0 mm), SYSBM 001800.

FIG. 4 in Allozyme electrophoresis demonstrates the presence of a species boundary in freshwater crabs (Decapoda: Potamonautidae)

FIG. 4. Allele frequencies at the LDH locus in the 25 populations of Potamonautes studied. Refer to Žgure 1 for collection localities.

FIG. 1 in Allozyme electrophoresis demonstrates the presence of a species boundary in freshwater crabs (Decapoda: Potamonautidae)

FIG. 1. Sampling localities of the 25 populations of Potamonautes studied. Potamonautes granularis (), P. perlatus () and P. sidneyi () were collected from the Western Cape (WC), Eastern Cape (EC), KwaZulu-Natal (KZN), Mpumalanga (MP) and the Northern Province (NP). Localities include: (1) Klawer, (2) Doring River, (3) Clanwilliam, (4) Paarl, (5) Tokai, (6) Liesbeek, (7) Bonnievale, (8) Tradouw Pass, (9) Tsitsikamma, (10) Smitskraal, (11) Hankey, (12) Belmont, (13) Umtata, (14) Pinetown, (15) University of Zululand, (16) Dakaneni, (17) Blood River, (18) Oliviershoek, (19) Mahai, (20) Cathedral Peak, (21) Wakkerstroom, (22) Vaal River, (23) Sterkspruit, (24) Mukhasa and (25) Tchiombedi.

FIG. 2 in Allozyme electrophoresis demonstrates the presence of a species boundary in freshwater crabs (Decapoda: Potamonautidae)

FIG. 2. UPGMA-dendrogram, reecting genetic similarity amongst the 25 Potamonautes populations studied, as calculated from Nei's (1978) unbiased genetic identities (I) obtained in pair-wise comparisons of populations.

FIG. 5 in Allozyme electrophoresis demonstrates the presence of a species boundary in freshwater crabs (Decapoda: Potamonautidae)

FIG. 5. Scatterplots of geographic distance (km) over Nei's (1978) unbiased genetic identity (I) for each pair-wise comparison of (a) the eight P. perlatus populations, and (b) the 13 P. sidneyi populations studied. Solid lines represent least-squares regressions and dotted lines represent 95% conŽdence limits.

FIG. 3 in A new genus and new species of freshwater crab (Potamoidea, Potamidae) from Socotra Island, Yemen

FIG. 3. Socotra pseudocardisoma new species, from Socotra, male, type, carapace width 5 77.2 mm. (A) Details of left orbital region, frontal view; (B) details of frontal region, frontal view. Scale bar: 2.5 mm.

FIG. 4 in A new genus and new species of freshwater crab (Potamoidea, Potamidae) from Socotra Island, Yemen

FIG. 4. Socotra pseudocardisoma new species, from Socotra, male, type, carapace width 5 77.2 mm. (A) Right gonopod 1, ventral aspect; (B) right gonopod 1, dorsal aspect; (C) right gonopod 1, dorsal aspect; (D) right gonopod 1, superior view, showing groove; (E) right gonopod 2, ventral aspect. Scale bar: 2.5 mm (A±C, E), 1.6 mm (D).

FIG. 1 in A new genus and species of freshwater crab (Crustacea, Decapoda, Potamoidea) from northern Madagascar, and a second new species associated with Pandanus leaf axils

FIG. 1. Marojejy longimerus new genus, new species, from Madagascar, male, holotype, carapace width 523 mm: (A) cephalothorax, dorsal aspect; (B) cephalothorax, frontal aspect. Scale bar equals 5.1 mm.

FIG. 4 in A new genus and species of freshwater crab (Crustacea, Decapoda, Potamoidea) from northern Madagascar, and a second new species associated with Pandanus leaf axils

FIG. 4. Gecarcinautes goodmani, new species, from Madagascar, male, holotype, carapace width 523.5 mm: (A) cephalothorax, dorsal aspect; (B) cephalothorax, frontal aspect. Scale bar equals 5.8 mm.

FIG. 2 in A new genus and new species of freshwater crab (Potamoidea, Potamidae) from Socotra Island, Yemen

FIG. 2. Socotra pseudocardisoma new species, from Socotra, male, holotype, carapace width 577.2 mm. (A) Carpus of right cheliped, superior view; (B) carpus and merus of right cheliped, superior view; (C) merus of right cheliped inferior view; (D) left mandible showing details of palp; (E) abdomen and part of sternum; (F) left third maxilliped showing details of the exopod, and anterior sternum. Scale bar: 6.0 mm (A± C), 1.2 mm (D), 10.0 mm (E), 2.6 mm (F).

FIG. 3 in A new genus and species of freshwater crab (Crustacea, Decapoda, Potamoidea) from northern Madagascar, and a second new species associated with Pandanus leaf axils

FIG. 3. Marojejy longimerus new genus, new species, from Madagascar, male, holotype, carapace width 523 mm: (A) right gonopod 1, ventral aspect; (B) right gonopod 1, dorsal aspect; (C) right gonopod 1 turned to show longitudinal groove; (D) right gonopod 1 showing details of tip; (E) right gonopod 2, ventral aspect; (F) left mandible showing details of palp; (G) left third maxilliped showing details of the exopod. Scale bar equals 2.0 mm (A±E), 5.0 mm (F).

FIG. 1 in A new genus and new species of freshwater crab (Potamoidea, Potamidae) from Socotra Island, Yemen

FIG. 1. Socotra pseudocardisoma new species, from Socotra, male, holotype, carapace width 577.2 mm. (A) Cephalothorax, dorsal aspect; (B) cephalothorax, frontal aspect. Scale bar: 5.0 mm.

FIG. 2 in A new genus and species of freshwater crab (Crustacea, Decapoda, Potamoidea) from northern Madagascar, and a second new species associated with Pandanus leaf axils

FIG. 2. Marojejy longimerus new genus, new species, from Madagascar, male, holotype, carapace width 523 mm: (A) abdomen; (B) sternum; (C) merus of right cheliped inferior view; (D) carpus and merus of right cheliped, superior view; (E) right cheliped, frontal aspect; (F) left cheliped, frontal aspect. Scale bar equals 10.0 mm.

FIG. 5 in A new genus and new species of freshwater crab (Potamoidea, Potamidae) from Socotra Island, Yemen

FIG. 5. (a) Sketch map showing the Socotra Archipelago (source: Kopp, in Wranik, 1999); (b) map of Socotra showing highland area where Socotra pseudocardisoma new species was collected (12ss27¾N, 53ss59¾E).

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FIGURE 2. Teretamon kempi n in A new species of freshwater crab of the genus Teretamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India

FIGURE 2. Teretamon kempi n. sp., holotype male (ZSI-C7128/2), A. dorsal habitus; B. frontal view of cephalothorax; C. male thoracic sternum and pleon.

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FIGURE 6. A, Teretamon kempi n in A new species of freshwater crab of the genus Teretamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India

FIGURE 6. A, Teretamon kempi n. sp., holotype male (ZSI-C7128/2) live photo; B, habitat of Teretamon kempi n. sp. in its type locality; C, landscape of Namdapha Tiger Reserve, the type locality of Teretamon kempi n. sp.