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1,021 results for “freshwater crabs”
FIGURE 4 in Tiwaripotamon keeae sp. nov. (Crustacea: Decapoda: Potamidae), a new miniature species of freshwater crab from the China-Vietnam border in Napo, Guangxi
FIGURE 4. Tiwaripotamon keeae sp. nov.: A, B, male holotype (18.0 × 13.3 mm), SYSBM 002010; C, D, female paratype (14.8 × 11.1 mm), SYSBM 002011. A, D, major chela; B, C, minor chela. Scale bars: 5.0 mm.
FIGURE 5 in Tiwaripotamon keeae sp. nov. (Crustacea: Decapoda: Potamidae), a new miniature species of freshwater crab from the China-Vietnam border in Napo, Guangxi
FIGURE 5. Tiwaripotamon keeae sp. nov., dorsal habitus with legs extended: A, male paratype (15.1 × 11.5 mm), AM P105567; B, female paratype (18.1 × 13.5 mm), AM P105567.
FIGURE 2 in Tiwaripotamon keeae sp. nov. (Crustacea: Decapoda: Potamidae), a new miniature species of freshwater crab from the China-Vietnam border in Napo, Guangxi
FIGURE 2. Tiwaripotamon keeae sp. nov.: A–D, male holotype (18.0 × 13.3 mm), SYSBM 002010; E, F, female paratype (14.8 × 11.1 mm), SYSBM 002011. A, cephalothorax, anterior view; B, anterior thoracic sternum; C, anterior thoracic sternum and pleon, ventral view; D, sterno-pleonal cavity with G1 in situ; E, pleon, F, vulvae.
FIGURE 4. Rodriguezia adani n in A new species of stygobitic freshwater crab of the genus Rodriguezia Bott, 1969 (Crustacea: Decapoda: Trichodactylidae) from Tabasco, Mexico
FIGURE 4. Rodriguezia adani n. sp. first gonopod: A, E, cephalothoracic view; B, F, lateral view; C, G, caudal view; D, H, mesial view.
FIGURE 3. Rodriguezia adani n in A new species of stygobitic freshwater crab of the genus Rodriguezia Bott, 1969 (Crustacea: Decapoda: Trichodactylidae) from Tabasco, Mexico
FIGURE 3. Rodriguezia adani n. sp.: A, B, frontal view of carapace, male holotype; C, male abdomen; D, female abdomen; E, antennule; F, antenna; G, third maxilliped; H, chelae. Scale bars: A, B, H = 5 mm; C, D = 3 mm; E, F = 1 mm; G = 2 mm.
FIGURE 5 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation
FIGURE 5. Louisea balssi (Bott, 1959), adult male CW 16.2 mm from Man's Crater Lake Manengouba, Cameroon (ZMB Crust. 30319). a, G1 ventral view; b, G1 dorsal view; c, G2 ventral view. Scale bar equals 1 mm (a,b), 2 mm (c).
FIGURE 6 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation
FIGURE 6. View of Man's Crater Lake Manengouba, Cameroon, showing the steep forested slopes that include the stream habitat of Louisea balssi (Bott, 1959).
FIGURE 3 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation
FIGURE 3. Louisea balssi (Bott, 1959), adult male CW 16.2 mm from Man's Crater Lake Manengouba, Cameroon (ZMB Crust. 30319). a, right chela frontal view; b, left chela frontal view; c, right cheliped carpus showing the first (distal) and second (proximal) carpal teeth; d, right cheliped merus showing the inferior margin with the large and prominent distal tooth and the toothed margin. Scale bar equals 5 mm (a, b), 2 mm (c, d).
FIGURE 4 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation
FIGURE 4. Louisea balssi (Bott, 1959), adult male CW 16.2 mm from Man's Crater Lake Manengouba, Cameroon (ZMB Crust. 30319). a, third maxilliped showing the faint vertical groove on the ischium, and the absence of a flagellum on the exopod; a, frontal view of right mandible showing small hard setose process at the junction between the palp segments; b, ventral view of the right mandible. Scale bar equals 2 mm (a), 1 mm (c, d).
FIGURE 2 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation
FIGURE 2. Louisea balssi (Bott, 1959), adult male CW 16.2 mm from Man's Crater Lake Manengouba, Cameroon (ZMB Crust. 30319). a, carapace dorsal view; b, carapace, frontal view; c, thoracic sternite. Scale bar equals 5 mm (a,b,c).
FIGURE 1 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation
FIGURE 1. Louisea balssi (Bott, 1959), adult male CW 16.2 mm from Man's Crater Lake Manengouba, Cameroon (ZMB Crust. 30319) (missing left periopod 5). Dorsal view of whole animal showing color when freshly collected. Scale bar equals 8 mm.
FIGURE 11. A in A new genus and species of primary freshwater crab and a new species of Artopotamon Dai & Chen, 1985 (Crustacea, Brachyura, Potamidae) from western Yunnan, China
FIGURE 11. A Bayesian inference (BI) tree for the two new species and the remaining Asian potamid crabs with accession numbers based on 16S rRNA gene sequences. Probability values at the nodes represent support values for BI and maximum likelihood (ML). Only values> 50% are shown. The two new species are shown in gray highlighted.
FIGURE 10. Gonopods. A, B in A new genus and species of primary freshwater crab and a new species of Artopotamon Dai & Chen, 1985 (Crustacea, Brachyura, Potamidae) from western Yunnan, China
FIGURE 10. Gonopods. A, B, Semicirculara lincangensis gen. & sp. nov. holotype, male, 18.8 × 14.4 mm, NNU 160562; C, D, Artopotamon latopeos sp. nov. holotype, male, 24.5 × 20.5 mm, NNU 170507. A, C, ventral view of left G1 without G2; B, D, dorsal view of distal part of left G1. Scale bar = 1.0 mm.
FIGURE 9 in A new genus and species of primary freshwater crab and a new species of Artopotamon Dai & Chen, 1985 (Crustacea, Brachyura, Potamidae) from western Yunnan, China
FIGURE 9. Artopotamon compressum Dai & Chen, 1985. A, paratype, male, 18.0 × 14.4 mm, IZCAS CB00738; ventral view showing anterior thoracic sternum and pleon; B, D, holotype, male, 23.3 × 18.6 mm, IZCAS CB00733; B, sterno-pleonal cavity with right G1 in situ. D, dorsal view of carapace; C, female paratype, 30.6 × 24.0 mm, IZCAS CB00734, vulvae. Scale bar = 1.0 mm.
FIGURE 8 in A new genus and species of primary freshwater crab and a new species of Artopotamon Dai & Chen, 1985 (Crustacea, Brachyura, Potamidae) from western Yunnan, China
FIGURE 8. Artopotamon latopeos sp. nov. A–C, paratype, female, 24.7 × 19.8 mm, NNU 170510. A, ventral view of cephalothorax, chelae, and pleon. B, thoracic sternum and vulvae. C, vulvae; D, holotype, male, 24.5 × 20.5 mm, NNU 170507, sterno-pleonal cavity with right G1 in situ. Scale bar = 1.0 mm.
FIGURE 7 in A new genus and species of primary freshwater crab and a new species of Artopotamon Dai & Chen, 1985 (Crustacea, Brachyura, Potamidae) from western Yunnan, China
FIGURE 7. Artopotamon latopeos sp. nov. A, B, D–F, holotype, male, 24.5 × 20.5 mm, NNU 170507. A, left G1 (ventral view); B, left G1 (dorsal view); D, left third maxilliped; E, G1 terminal segment (ventral view); F, left G2. C, Artopotamon compressum Dai & Chen, 1985, holotype, male, 23.3 × 18.6 mm, IZCAS CB00733; left G1 (ventral view). Scale bar = 1.0 mm.
FIGURE 6 in A new genus and species of primary freshwater crab and a new species of Artopotamon Dai & Chen, 1985 (Crustacea, Brachyura, Potamidae) from western Yunnan, China
FIGURE 6. Artopotamon latopeos sp. nov. holotype, male, 24.5 × 20.5 mm, NNU 170507. A, dorsal view; B, frontal view of cephalothorax; C, ventral view of cephalothorax, chelae and pleon.
FIGURE 4. A–D in A new genus and species of primary freshwater crab and a new species of Artopotamon Dai & Chen, 1985 (Crustacea, Brachyura, Potamidae) from western Yunnan, China
FIGURE 4. A–D, Semicirculara lincangensis gen. & sp. nov. A, B, holotype, male, 18.8 × 14.4 mm, NNU 160562: A, sternopleonal cavity with right G1 in situ; B pleon; C, D, paratype, female, 20.2 × 15.9 mm, NNU 160567: C, pleon; D, thoracic sternum and vulvae. E, Pararanguna semilunatum (Dai & Chen, 1985): female, 22.3 × 17.1 mm, NNU 151103; thoracic sternum and vulvae. F, Aparapotamon inflomanum Dai & Chen, 1985: female, 21.6 × 17.9 mm, NNU 142202; thoracic sternum and vulvae. Scale bar = 1.0 mm.
FIGURE 5 in A new genus and species of primary freshwater crab and a new species of Artopotamon Dai & Chen, 1985 (Crustacea, Brachyura, Potamidae) from western Yunnan, China
FIGURE 5. Ventral view of G1. A, Semicirculara lincangensis gen. & sp. nov. holotype, male, 18.8 × 14.4 mm, NNU 160562. B, Pararanguna semilunatum (Dai & Chen, 1985) male, 16.9 × 13.3 mm, NNU151005. Scale bar = 1.0 mm. C, Aparapotamon inflomanum Dai & Chen, 1985, male, 16.8 × 13.6 mm, NNU 142201. Scale bar = 1.0 mm.
FIGURE 3 in A new genus and species of primary freshwater crab and a new species of Artopotamon Dai & Chen, 1985 (Crustacea, Brachyura, Potamidae) from western Yunnan, China
FIGURE 3. Semicirculara lincangensis gen. & sp. nov., holotype, male, 18.8 × 14.4 mm, NNU 160562. A, outer surfaces of right major chela; B, left third maxilliped; C–D, left G1 without G2: D, dorsal view; E, ventral view of terminal segment; E, left G2. Scale bar = 1.0 mm.
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