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Figure 8 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil

Figure 8. Canonical correspondence analysis between different demographic groups and environmental variables of rainfall and reservoir water level. AF = adult females; AM = adult males, FEJ = female with eggs and juveniles; JF = juvenile females; JM = juvenile males.

Figure 6 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil

Figure 6. (a) Sex ratio by size classes and total number of individuals of Dilocarcinus pagei Stimpson, 1861 sampled during the study period. (b) Monthly sex ratio of individuals of Dilocarcinus pagei. White circles indicate a significant difference in relation to the 1:1 ratio (binomial test, p <.05), and black circles indicate that there was no significant difference. Values above and below 0.5 indicate deviations for males and females, respectively. CW = carapace width.

Figure 4 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil

Figure 4. Frequency of carapace width of Dilocarcinus pagei Stimpson, 1861. AF = adult females; AM = adult males, CW = carapace width, FEJ = female with eggs and juveniles; JF = juvenile females; JM = juvenile males.

Figure 2 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil

Figure 2. (a) Dilocarcinus pagei Stimpson, 1861; (b) abdomen width; (c) carapace width; (d) right propodus length; (e) female with eggs; (f) female with eggs and juveniles in the abdominal cavity (both at the same time); (g) female with juveniles in the abdominal cavity. Scale bar: 20 mm.

Figure 1 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil

Figure 1. Location (a) and characterisation (b–e) of the study area in the Araguari River, Tupaciguara, Minas Gerais, Brazil. The sampled section is shown inside the red circle. b = partially exposed Melo Viana bridge found in the original riverbed. The Melo Viana bridge connected the cities of Araguari and Tupaciguara before the dam´s construction in the 1970s when it was submerged by the reservoir filling. b–d = grasses and macrophytes on the banks; e = burrows on the slopes.

Figure 3 in Population biology of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the Araguari River, south-eastern Brazil

Figure 3. Sampled data on local rainfall and water level in the reservoir during the sampling period, from September 2020 to November 2021.

FIGURE 2. Liberonautes constantini n in A checklist and key to the Ivorian freshwater crabs, with the description of a new species of Liberonautes Bott, 1955 (Brachyura: Potamoidea: Potamonautidae)

FIGURE 2. Liberonautes constantini n. sp., holotype, adult ♁ CW 21.8 mm, from Mt. Tonkoui, Côte d'Ivoire (MNHN-IU- 2022-3213). (A) frontal view of right chela; (B) frontal view of left chela; (C) right cheliped carpus and merus dorsal view; (D) right cheliped merus underside; (E) third maxilliped, frontal view; (F) right G1 ventral view; (G) right G1 dorsal view; (H) left mandible, frontal view. Scale bar: A = 4.9 mm, B = 3.6 mm, C = 3.3, D = 4.0 mm, E = 1.7 mm, F = 1.0 mm, G = 1.1 mm, H = 1.2 mm.

FIGURE 3 in A checklist and key to the Ivorian freshwater crabs, with the description of a new species of Liberonautes Bott, 1955 (Brachyura: Potamoidea: Potamonautidae)

FIGURE 3. Map of West Africa showing the geographic distribution of the seven species of freshwater crabs found in Côte d'Ivoire. Black circles = species of Liberonautes; white squares = species of Sudanonautes; black triangles = species of Occidensonautes. 1 = Liberonautes latidactylus, 2 = L. paludicolis, 3 = L. constantini n. sp., 4 = L. chaperi, 5 = Sudanonautes aubryi, 6 = S. koudougou, 7 = Occidensonautes ecorssei. Scale bar = 220 km. See Table 2 for exact localities.

FIGURE 1. Liberonautes constantini n in A checklist and key to the Ivorian freshwater crabs, with the description of a new species of Liberonautes Bott, 1955 (Brachyura: Potamoidea: Potamonautidae)

FIGURE 1. Liberonautes constantini n. sp., holotype, adult ♁ CW 21.8 mm, from Mt. Tonkoui, Côte d'Ivoire (MNHN-IU- 2022-3213). (A) whole animal, dorsal view; (B) carapace, frontal view; (C) thoracic sternum, ventral view. Scale bar: A = 6.3 mm, B = 2.5 mm, C = 3.1 mm.

FIGURE 9. Aiyunamon vietnamicum n in Two new species of semiaquatic freshwater crabs of the genera Tortomon and Aiyunamon from karst forests in northern Vietnam (Crustacea: Brachyura: Potamidae)

FIGURE 9. Aiyunamon vietnamicum n. sp., holotype male (21.5 × 17.5 mm) (ZRC 2022.790), Vietnam. A, left G1 (ventral view); B, distal part of left G1 (ventral view); C, distal part of left G1 (dorsal view); D, left G2. Scales: A, D = 1.0 mm; B, C = 0.5 mm.

FIGURE 8. Aiyunamon vietnamicum n in Two new species of semiaquatic freshwater crabs of the genera Tortomon and Aiyunamon from karst forests in northern Vietnam (Crustacea: Brachyura: Potamidae)

FIGURE 8. Aiyunamon vietnamicum n. sp. A, F, G, paratype female (32.8 × 25.5 mm) (ZRC 2022.791), Vietnam; B–E, holotype male (21.5 × 17.5 mm) (ZRC 2022.790), Vietnam. A, dorsal view of carapace; B, male anterior thoracic sternum and pleon; C, male pleon; D, male sternopleonal cavity; E, right fourth ambulatory leg; F, female pleon; G, female sternopleonal cavity showing vulvae.

FIGURE 2. Tortomon distinctum n in Two new species of semiaquatic freshwater crabs of the genera Tortomon and Aiyunamon from karst forests in northern Vietnam (Crustacea: Brachyura: Potamidae)

FIGURE 2. Tortomon distinctum n. sp., holotype male (19.2 × 13.0 mm) (ZRC 2022.797), Vietnam. A, overall dorsal habitus; B, dorsal view of carapace, C, frontal view of cephalothorax; D, epistome and antennules; E, right third maxilliped; F, chelae.

FIGURE 3. Tortomon distinctum n in Two new species of semiaquatic freshwater crabs of the genera Tortomon and Aiyunamon from karst forests in northern Vietnam (Crustacea: Brachyura: Potamidae)

FIGURE 3. Tortomon distinctum n. sp. A–D, G–I, holotype male (19.2 × 13.0 mm) (ZRC 2022.797), Vietnam; E, paratype male (18.3 × 12.4 mm) (ZRC 2022.798), Vietnam; F, paratype male (19.5 × 12.8 mm) (ZRC 2022.798), Vietnam. A, buccal cavity, anterior thoracic sternum and pleon; B, sternopleonal cavity; C, right fourth ambulatory leg; D–F, pleon; G, left G1 (ventral view); H, left G1 (dorsal view); I, left G2, ventral view). G–I, same scale.

FIGURE 6. Aiyunamon vietnamicum n in Two new species of semiaquatic freshwater crabs of the genera Tortomon and Aiyunamon from karst forests in northern Vietnam (Crustacea: Brachyura: Potamidae)

FIGURE 6. Aiyunamon vietnamicum n. sp., colour in life. A, paratype female (32.8 × 25.5 mm) (ZRC 2022.791), Vietnam; B–F, paratype female (27.6 × 21. 2 mm) (ZRC 2022.791), Vietnam; F–H, holotype male (21.5 × 17.5 mm) (ZRC 2022.790), Vietnam. A, B, dorsal view of carapace; D, F, ventral view of cephalothorax; E, female sternopleonal cavity; G, frontal view of cephalothorax; H, male pleon and gonopods.

FIGURE 7. Aiyunamon vietnamicum n in Two new species of semiaquatic freshwater crabs of the genera Tortomon and Aiyunamon from karst forests in northern Vietnam (Crustacea: Brachyura: Potamidae)

FIGURE 7. Aiyunamon vietnamicum n. sp., holotype male (21.5 × 17.5 mm) (ZRC 2022.790), Vietnam. A, overall dorsal habitus; B, dorsal view of carapace; C, left third maxilliped; D, frontal view of cephalothorax; E, epistome, antennules and antennae; F, chelae.

FIGURE 5. Tortomon distinctum n in Two new species of semiaquatic freshwater crabs of the genera Tortomon and Aiyunamon from karst forests in northern Vietnam (Crustacea: Brachyura: Potamidae)

FIGURE 5. Tortomon distinctum n. sp., paratype female (18.0 × 12.3 mm) (ZRC 2022.798), Vietnam. A, overall dorsal habitus; B, buccal cavity, anterior thoracic sternum and pleon; C, sternopleonal cavity showing vulvae.

FIGURE 1. Tortomon distinctum n in Two new species of semiaquatic freshwater crabs of the genera Tortomon and Aiyunamon from karst forests in northern Vietnam (Crustacea: Brachyura: Potamidae)

FIGURE 1. Tortomon distinctum n. sp., colour in life. Paratype male (18.3 × 12.4 mm) (ZRC 2022.798), Vietnam. A, overall dorsal habitus; B, frontal view; C, major chela; D, ventral surface and gonopods.

FIGURE 4. Tortomon distinctum n in Two new species of semiaquatic freshwater crabs of the genera Tortomon and Aiyunamon from karst forests in northern Vietnam (Crustacea: Brachyura: Potamidae)

FIGURE 4. Tortomon distinctum n. sp., holotype male (19.2 × 13.0 mm) (ZRC 2022.797), Vietnam. A, left G1 (ventral view); B, distal part of left G1 (ventral view); C, distal part of left G1 (dorsomesial view); D, distal part of left G1 (dorsal view); E, left G2 (ventral view); F, distal part of left G2 (ventral view); G, distal part of left G2 (dorsal view). Scales: A, E = 0.5 mm; B–D, F, G = 0.2 mm.

FIGURE 5 in A new genus and new species of freshwater crab (Decapoda: Brachyura: Gecarcinucidae) from the Central Western Ghats of India

FIGURE 5. Aradhya placida gen. et sp. nov., holotype male (25.12 × 19.85 mm) (ZSI-WRC C.2292). A, mouth parts exposed; B, third maxillipeds; C, thoracic sternites with G1 and G2; D, pleon and telson; E, dorsal view of left G1; F, left G2. Scale bars = 5 mm (C, D), 2 mm (A, B, E), 1 mm (F).

FIGURE 2 in A new genus and new species of freshwater crab (Decapoda: Brachyura: Gecarcinucidae) from the Central Western Ghats of India

FIGURE 2. Aradhya placida gen. et sp. nov., holotype male (25.12 × 19.85 mm) (ZSI-WRC C.2292). A, overall dorsal view; B, frontal view of cephalothorax; C, overall ventral view. Scale bar = 10 mm.