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Fig. 14 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 14. Dromothelphusa longipes (A. Milne-Edwards, 1869), male (34.6 × 28.1 mm) (ZRC 2021.0858), Con Dao. A, left G1 (ventral view); B, distal part of left G1 (ventral view); C, distal part of left G1 (subventral view); D, distal part of left G1 (mesial view); E, distal part of left G1 (dorsal view); F, left G2. Scales: A, F = 1.0 mm; B–E = 0.5 mm.

Fig. 13 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 13. Dromothelphusa longipes (A. Milne-Edwards, 1869), exopods of third maxillipeds. A, B, female (20.6 × 17.4 mm) (ZRC 2021.0862); C, female (19.8 × 16.2 mm) (ZRC 2021.0862); D, E, male (18.2 × 14.7 mm) (ZRC 2021.0862); F, female (38.6 × 30.4 mm) (ZRC 2021.0862); G, male (29.9 × 24.6 mm) (ZRC 2021.0862); H, female (36.6 × 29.7 mm) (ZRC 2021.0858); I, male (30.3 × 25.4 mm) (ZRC 2021.0858); J, male (30.1 × 25.2 mm) (ZRC 2021.0858); K, male (34.6 × 28.1 mm) (ZRC 2021.0858). All from Con Dao. A, D, right exopod; B, C, E–K, left exopod. Scales: A–G = 0.5 mm; H–K = 1.0 mm.

Fig. 10 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 10. Dromothelphusa longipes (A. Milne-Edwards, 1869). A, B, lectotype male (56.5 × 43.6 mm) (MNHN-IU-2014-23055), Condore; C, paralectotype female (54.9 × 41.3 mm) (MNHN-IU-2014-23074), Condore. A, overall dorsal view; B, C, dorsal view of carapace.

Fig. 9 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 9. Dromothelphusa longipes (A. Milne-Edwards, 1869), colour in life, all from Condore. A, male (30.3 × 25.4 mm) (ZRC 2021.0858); B, F, male (34.6 × 28.1 mm) (ZRC 2021.0858); C, female (36.6 × 29.7 mm) (ZRC 2021.0858); D, H, ovigerous female (49.7 × 39.4 mm) (ZRC 2021.0858); E, ovigerous female (50.0 × 39.2 mm) (ZRC 2021.0863); G, male (30.1 × 25.2 mm) (ZRC 2021.0858).

Fig. 8 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 8. Dromothelphusa longipes (A. Milne-Edwards, 1869), specimens in situ, all from Condore. A, male (34.6 × 28.1 mm) (ZRC 2021.0858); B, male (30.1 × 25.2 mm) (ZRC 2021.0858); C, male (30.3 × 25.4 mm) (ZRC 2021.0858); D, female (36.6 × 29.7 mm) (ZRC 2021.0858); E–G, ovigerous female (49.7 × 39.4 mm) (ZRC 2021.0858); H, ovigerous female (50.0 × 39.2 mm) (ZRC 2021.0863).

Fig. 12 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 12. Dromothelphusa longipes (A. Milne-Edwards, 1869). A–E, male (34.6 × 28.1 mm) (ZRC 2021.0858), Condore; F, ovigerous female (49.7 × 39.4 mm) (ZRC 2021.0858), Con Dao. A, chelae (outer view); B, right third ambulatory leg; C, right fourth ambulatory leg; D, pleon; E, sternopleonal cavity showing pleonal press-button locking mechanism and gonopods; F, sternopleonal cavity showing vulvae.

Fig. 7 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 7. Ranguna decourcyi (Kemp, 1913), holotype male (63.0 × 48.0 mm) (ZSIK 8006/10), Sirpo Valley, India. A, overall dorsal view; B, frontal view of cephalothorax; C, thoracic sternum, pleonal somites 4–6 and telson; D, sternopleonal cavity showing G1 and G2 in situ.

Fig. 11 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 11. Dromothelphusa longipes (A. Milne-Edwards, 1869). A–E, male (34.6 × 28.1 mm) (ZRC 2021.0858), Condore; F, ovigerous female (49.7 × 39.4 mm) (ZRC 2021.0858), Con Dao. A, F, overall dorsal view; B, dorsal view of carapace; C, frontal view of cephalothorax; D, left third maxilliped; E, thoracic sternum, pleonal somites 4–6 and telson.

Fig. 6 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 6. Ranguna rangoonensis (Rathbun, 1904). A–E, holotype male (65.0 × 49.8 mm) (MCZ 5562), "Rangoon"; F–L, male (25.9 × 20.8 mm) (MBA 952a), "Unto Assam". A, pleon and telson; B, G, right G1 (ventral view); C, left G1 (ventral view); D, left G2; E, L, right G2 (deformed?); F, left third maxilliped; H, right G1 (dorsal view); I, distal part of right G1 (ventral view); J, K, distal part of right G1 (dorsal views in two different angles). A–D courtesy of MCZ. Scales: A = 10.0 mm; B–E = 5.0 mm; F–H, L = 2.0 mm; I–K = 0.5 mm.

Fig. 4. Potamiscus annandalii Alcock, 1909 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 4. Potamiscus annandalii Alcock, 1909, paralectotype male (30.5 × 25.7 mm) (NHM 1909.9.2.5), India. A, left G1 (ventral view); B, distal part of left G1 (ventral view); C, distal part of left G1 (dorsal view); D, tip of left G1 (ventral view); E, left G2. Scales: A, E = 1.0 mm; B–D = 0.5 mm.

Fig. 2. Potamiscus annandalii Alcock, 1909. A–D, G in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 2. Potamiscus annandalii Alcock, 1909. A–D, G, paralectotype male (30.5 × 25.7 mm) (NHM 1909.9.2.5), India; E, F, paralectotype female (30.0 × 23.1 mm) (NHM 1909.9.2.5), India. A, E, overall dorsal view; B, dorsal view of carapace; C, right third maxilliped; D, F, frontal view of cephalothorax; G, anterior thoracic sternum, pleonal somites 4–6 and telson.

Fig. 5 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 5. Ranguna rangoonensis (Rathbun, 1904), holotype male (65.0 × 49.8 mm) (MCZ 5562), Burma. A, dorsal view of carapace; B, frontal view of cephalothorax; C, epistome and antennules; D, right third maxilliped (outer view); E, left third maxilliped (deformed, outer view); F, left third maxilliped (deformed, inner view); G, right third maxilliped (inner view); H, left chela (outer view); I, right chela (outer view); J–M, left first to fourth ambulatory legs, respectively. Photographs courtesy of MCZ. Scales: A–C, H, I = 10.0 mm; D–G = 5.0 mm; J–M = 2.0 mm.

Fig. 1. Potamiscus annandalii Alcock, 1909 in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 1. Potamiscus annandalii Alcock, 1909, lectotype male (33.0 × 25.0 mm) (ZSIK 6602-3/9), India. A, overall dorsal view; B, frontal view of cephalothorax; C, thoracic sternum, pleonal somites 4–6 and telson; D, sternopleonal cavity showing left G1 in situ; E, right G1 (ventral view); F, right G1 (dorsal view); G, right G2.

Fig. 3. Potamiscus annandalii Alcock, 1909. A–E in Clarifying the identities of the Asian potamid genera Potamiscus Alcock, 1909, Ranguna Bott, 1966, and Dromothelphusa Naiyanetr, 1992 (Crustacea: Brachyura: Potamoidea)

Fig. 3. Potamiscus annandalii Alcock, 1909. A–E, paralectotype male (30.5 × 25.7 mm) (NHM 1909.9.2.5), India; F, paralectotype female (30.0 × 23.1 mm) (NHM 1909.9.2.5), India. A, chelae (outer view); B, pleon and telson; C, left G1 (ventral view); D, left G2; E, sternopleonal cavity showing pleonal press-button locking mechanism; F, sternopleonal cavity showing vulvae.

Fig. 4 in Aiyunamon, a new genus for southern Chinese potamid species previously placed in Eosamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae)

Fig. 4. Male pleon of species of Aiyunamon, new genus, and Eosamon smithianum (Kemp, 1923). A, A. daiae (Zhang & Sun, 2020), NNU 190503; B, A. lushuiense (Dai & Chen, 1985), NNU 148401; C, A. tengchongense (Dai & Chen, 1985), NNU 193261; D, A. tumidum (Wood-Mason, 1871), IZCAS CB11382; E, E. smithianum, ZRC 1990.498.

Fig. 6 in Aiyunamon, a new genus for southern Chinese potamid species previously placed in Eosamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae)

Fig. 6. Vulvae of species of Aiyunamon, new genus, and Eosamon smithianum (Kemp, 1923). A, A. daiae (Zhang & Sun, 2020), NNU 190505; B, A. lushuiense (Dai & Chen, 1985), NNU 282103; C, A. tengchongense (Dai & Chen, 1985), NNU 282202; D, A. tumidum (Wood-Mason, 1871), IZCAS CB11383; E, E. smithianum, ZRC 1990.498.

Fig. 3 in Aiyunamon, a new genus for southern Chinese potamid species previously placed in Eosamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae)

Fig. 3. Frontal view of carapace of species of Aiyunamon, new genus, and Eosamon smithianum (Kemp, 1923). A, A. daiae (Zhang & Sun, 2020), NNU 190503; B, A. lushuiense (Dai & Chen, 1985), NNU 148401; C, A. tengchongense (Dai & Chen, 1985), NNU 193261; D, A. tumidum (Wood-Mason, 1871), IZCAS CB11382; E, E. smithianum, ZRC 1990.498.

Fig. 1 in Aiyunamon, a new genus for southern Chinese potamid species previously placed in Eosamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae)

Fig. 1. Distribution of Aiyunamon species. Species occurrence records were obtained through long-term field surveys by the Chinese authors.

Fig. 5 in Aiyunamon, a new genus for southern Chinese potamid species previously placed in Eosamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae)

Fig. 5. Male first gonopod (G1) of species of Aiyunamon, new genus, and Eosamon smithianum (Kemp, 1923). A, F, A. daiae (Zhang & Sun, 2020), NNU 190503; B, G, A. lushuiense (Dai & Chen, 1985), NNU 148401; C, H, A. tengchongense (Dai & Chen, 1985), NNU 193261; D, I, A. tumidum (Wood-Mason, 1871), IZCAS CB11382; E, J, E. smithianum, ZRC 1990.498. A–D, right G1, dorsal view; F–I, right G1, ventral view; E, J, left G1, dorsal and ventral views, respectively (laterally transposed for comparisons).

Fig. 2 in Aiyunamon, a new genus for southern Chinese potamid species previously placed in Eosamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae)

Fig. 2. Overall habitus of species of Aiyunamon, new genus, and Eosamon smithianum (Kemp, 1923). A, A. daiae (Zhang & Sun, 2020), NNU 190503; B, A. lushuiense (Dai & Chen, 1985), NNU 148401; C, A. tengchongense (Dai & Chen, 1985), NNU 193261; D, A. tumidum (Wood-Mason, 1871), IZCAS CB11382; E, E. smithianum, ZRC 1990.498.