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224 results for “Brachyuran crabs”
FIGURE 14. Macrophthalmus laevis A in Brachyuran crabs of the family Macrophthalmidae Dana, 1851 (Decapoda: Brachyura: Macrophthalmidae) of the Persian Gulf
FIGURE 14. Macrophthalmus laevis A. Milne-Edwards, 1867: a–c, male (SMF 26293); d, e, female (SMF 36896). a, G of male, ventral surface (right); b, apical part of G1, ventral surface; c, apical part of G1, lateral surface; d, female abdomen, penultimate segment and telson; e, female gonopore.
FIGURE 35. A–E, First male gonopods. A–C in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 35. A–E, First male gonopods. A–C, Cataleptodius floridanus (Gibbes, 1850). A, B, Male, cl 17 mm, cw 27 mm (MZUSP 9937). C, Male from Tortugas, Florida, cl 7 mm, cw 11 mm (after Monod 1956: 293, fig. 356, as Xantho floridana, reproduced by Guinot 1968: 707, fig. 23, as Cataleptodius floridanus). D, Mecataleptodius parvulus (Fabricius, 1793), gen. nov., comb. nov., male, cl 7.6 mm, cw 12 mm (MZUSP 41069). E, Mecataleptodius olsoni (Manning & Chace, 1990), gen. nov., comb. nov., holotype male, cl 5 mm, cw 7.8 mm (USNM 221887) (after Manning & Chace 1990: 55, fig. 35g). Scales: A, 0.5 mm. B, D, 0.1 mm. C, 1 mm.
FIGURE 34. A, B in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 34. A, B, Mecataleptodius parvulus (Fabricius, 1793), gen. nov., comb. nov., male, cl 6.5 mm, cw 10 mm (MZUSP 40848). C–E, Mecataleptodius olsoni (Manning & Chace, 1990), gen. nov., comb. nov., holotype male, cl 5 mm, cw 7.8 mm (USNM 221887). Habitus, dorsal (A, C) and ventral (B) aspects. D, Anterior view of frontorbital region. E, Right cheliped, lateral view. Photographs (A, B) by A. Pol.
FIGURE 54. A–E, Cyclograpsus integer H. Milne Edwards, 1837. A, B in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 54. A–E, Cyclograpsus integer H. Milne Edwards, 1837. A, B, Juvenile female, cl 5.9 mm, cw 7 mm (MZUSP 42516). C–E, Male, cl 8.4 mm, cw 9.1 mm (MZUSP 42516). Scales: 2 mm. Photographs by P.A. Hernáez Bové.
FIGURE 53. A–C, E, F in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 53. A–C, E, F, Plagusia depressa (Fabricius, 1775). A, B, Male, cl 33 mm, cw 37 mm (MZUSP 41244). C, Male, cl 35 mm, cw 39 mm (MZUSP 41247). D–F, Habitats of Plagusia depressa at Praia dos Portugueses, Trindade Island, July 2015. Photographs: (A–C) by A. Pol, (D–F) by J.B. Mendonça.
FIGURE 33. A–H in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 33. A–H, Glyptoxanthus vermiculatus (Lamarck, 1818). A, B, Female, cl 23 mm, cw 31 mm (MZUSP 40938). C, D, Male, cl 19 mm, cw 23 mm (MZUSP 33832). E–H, Male, cl 16 mm, cw 21 mm (MZUSP 41263). Note in (B, F) afferent opening at the base of the cheliped protected by dense setae (arrows); in (G, H) the highly vermiculated pattern of the body and mottled colouration allowing for the crab to conceal its body by matching its background. Photographs by A. Pol.
FIGURE 46. A–I in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 46. A–I, Johngarthia lagostoma (H. Milne Edwards, 1837), Trindade Island. A, Pico do Desejado, around 600 m high (July 2018). B, Enseada dos Portugueses. Crabs seeking for food at night near the Brazilian Navy facilitiy (November 2017). C, Retreated to its burrow during the heat hours (December 2017). D, Preying upon a newborn sea turtle at night (May 2012). E, F, Hunting seabirds' chicks and eggs (November and December 2017, respectively). G, Scavenging a carcasse of seabird (December 2017). H, I, Eating leaves o Ipomea (May 2012, December 2017). Note in (B) two main color morphs (yellow or orange and red or purple); in (G) purple morph. Photographs: (A, C, D, F–I) by J.B. Mendonça, (B, E) by A. Pol.
FIGURE 42. A–O in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 42. A–O, Williamstimpsonia denticulata (White, 1848). A, Juvenile male, cl 3.5 mm, cw 5 mm (MZUSP 41322). B, Juvenile male, cl 4 mm, cw 6 mm (MZUSP 40934). C, Juvenile female, cl 5.9 mm, cw 8.1 mm (MZUSP 41321). D, Female, cl 8 mm, cw 12.5 mm (MZUSP 41317). E, Male, cl 9.9 mm, cw 15.1 mm (MZUSP 33730). F, Male, cl 10 mm, cw 15.9 mm (MZUSP 412306). G, Ovigerous female, cl 10.9 mm, cw 17 mm (MZUSP 41320). H, Male, cl 11.2 mm, cw 18.1 mm (MZUSP 412305). I, Male, cl 11.9 mm, cw 18.9 mm (MZUSP 41309). J), Male, cl 12.8 mm, cw 20 mm (MZUSP 41304). K, Male, cl 12.2 mm, cw 19.9 mm (MZUSP 41308). L, Male, cl 14.5 mm, cw 22.1 mm (MZUSP 41312). M, Male, cl 14.9 mm, cw 23 mm (MZUSP 41314). N, O, Male, cl 15.5 mm, cw 25 mm (MZUSP 41313). Photographs by A. Pol.
FIGURE 24. A–G in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 24. A–G, Teleophrys pococki Rathbun, 1924. A, Adult male (MZUSP 39583), cl 9.2 mm, cw 10 mm. B, Ovigerous female (MZUSP 40614), cl 7.8 mm, cw 8 mm. C, D, Ovigerous female (MZUSP 39687), cl 6.1 mm, cw 6.1 mm. E, Juvenile male (MZUSP 40699), cl 4.1 mm, cw 4 mm. Note the more granular carapace and spiniform anterolateral teeth. F, G, Juvenile female (MZUSP 40194), cl 4 mm, cw 3.9 mm. Note decoration on the carapace and pereopods 2 to 5. Habitus dorsal (A–C, E, F) and ventral (D, G) view. Photographs by A. Pol.
FIGURE 39. A–C in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 39. A–C, Microcassiope minor (Dana, 1852). A, Carapace of female, cl 7 mm, cw 10 mm, Tenkpobo (as Tenpobo), Gulf of Guinea (after Monod 1956: 314, fig. 386, as Micropanope rufopunctata). B, Tip of the first male gonopod, nearly sternal view (from the type of Xanthodes granosus A. Milne-Edwards & Bouvier, 1898, Cape Verde, after Monod 1956: 316, fig. 387, as Micropanope rufopunctata). C, Tip of first gonopod, pleonal view, male, cl 4.5 mm, cw 6.1 mm (MZUSP 33819). Scales: A, 2.5 mm. B, C, 0.1 mm.
FIGURE 14. A–E in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 14. A–E, Epialtus parvulus sp. nov. A, B, Holotype male, cl 6.4 mm, cw 5.1 mm (MZUSP 40577). C, D, Ovigerous female, paratype, cl 6.5 mm, cw 5.6 mm (MZUSP 39678). E, Juvenile female, paratype, cl 3.8 mm, cw 2.9 mm (MZUSP 39679). F, Trindade Island, Ponta Noroeste, 9.4 m, one of the collection sites of Epialtus parvulus sp. nov. Photographs (C, D) by A. Pol.
FIGURE 18. A–F in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 18. A–F, Epialtus longirostris Sitmpson, 1860, dorsal aspect of the carapace. A, Bahamas, male, cl 4.5 mm, cw 3.0 mm (USNM 88670). B, Cuba, male, cl 7.5 mm, cw 5.5 mm (USNM 48742). C, Jamaica, female, cl 6.5 mm, cw 4.5 mm (USNM 43019). D, Porto Rico, male, cl 5.4 mm, cw 3.7 mm (holotype of E. longirostris portoricensis Rathbun, 1923) (USNM 24154). E, Porto Rico, juvenile male, cl 8.0 mm, cw 5.5 mm (USNM 75097), assigned to E. logirostris portoricensis by M. J. Rathbun around 1937. F, Porto Rico, female, cl 8.1 mm, cw 6.0 mm (USNM 1462844).
FIGURE 2 in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 2. Some intertidal habitats on Trindade Island. A, C, F, Parcel das Tartarugas: A, C, May 2012. F, June 2016. B, D, Praia dos Andradas, May 2012. E, Praia das Tartarugas (Parcel das Tartarugas can be seen in the horizon), May 2012. Photographs by J.B. Mendonça.
FIGURE 12. A–C, Acanthonyx petiverii H. Milne Edwards, 1834 in Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
FIGURE 12. A–C, Acanthonyx petiverii H. Milne Edwards, 1834, adult male, cl 16.7 mm, cw 11.5 mm (MZUSP 40595). A, B, Habitus, dorsal and ventral views, respectively. C, Detail of the carapace, dorsal view. D, Acanthonyx dissimulatus Coelho in Coelho & Torres, 1993, holotype male, cl 20 mm, cw 13.5 mm (MZUSP 6596). Arrows indicate in (C) the first branchial lobe well-developed and in (D) the characteristic hooked setae. Photographs (A–C) by A. Pol, (D) by J. Colavite.
Morphometric correlations between dietary and reproductive traits of two brachyuran crabs, Hemigrapsus sanguineus and Aratus pisonii
<p>Many animals have flexible morphological traits that allow them to succeed in differing circumstances with differing diets available to them. For brachyuran crabs, claw height and gut size are diet-specific and largely reflect foraging strategies, while abdomen width reflects relative levels of fecundity. However, the link between claw size and diet has largely been documented only for primarily carnivorous crabs, while the link between diet and fecundity is strong in herbivorous crabs. We sought to determine the nature of the intraspecific relationship between claw size, dietary habits, and fecundity for two primarily herbivorous crab species, <em>Hemigrapsus</em> <em>sanguineus</em> and <em>Aratus</em> <em>pisonii</em>. Specifically, we examined whether claw size and/or abdomen width can be used as reliable measures of individual diet strategy. To test these hypotheses, we collected crabs and measured the dimensions of their claws, abdomens, and guts. By comparing these dimensions for each individual, we found that strongly predictive relationships do not exist between these traits for the primarily herbivorous species in our study. Thus, identifying external morphological features that can be used to assess diets of primarily herbivorous crabs remains elusive.</p>
FIGURE 4. Fresh colouration. A in On a collection of brachyuran crabs from Lakshadweep, Indian Ocean (Crustacea: Decapoda: Brachyura)
FIGURE 4. Fresh colouration. A, Carupa tenuipes, female, 14.8 x 9.7 mm (DABFUK), Bitra; B, Trapezia lutea, male, 12.6 x 10.8 mm, (DABFUK), Bitra; C, Pseudoliomera granosimana, female, 17.2 x 10.9 mm (DABFUK), Minicoy; D, Liomera laevis, female, 20.9 x 12.1 mm (DABFUK), Minicoy; E, Juxtaxanthias lividus, male, 43.5 x 27.2 mm (DABFUK), Kavaratti.
FIGURE 3 in On a collection of brachyuran crabs from Lakshadweep, Indian Ocean (Crustacea: Decapoda: Brachyura)
FIGURE 3. Elamena gracilis (A–F). A, D–F, lectotype, male, 5.0 x 4.4 mm (CMZ I64238), Male Atoll, Maldives; B, paralectotype, female, 6.0 x 5.1 mm) (CMZ I64236), on reef, Minicoy; C, ovig. female, 7.3 x 6.2 mm, same data as lectotype. A–C, dorsal habitus; D, left third maxilliped, external view; E, pleon and pleotelson, ventral view; F, left G1, abdominal (external) view. Scale bar: 0.5 mm.
FIGURE 2. A in On a collection of brachyuran crabs from Lakshadweep, Indian Ocean (Crustacea: Decapoda: Brachyura)
FIGURE 2. A, Cryptodromia fallax, male, 7.1 x 6.4 mm (DABFUK), Kavaratti; B, Gonioinfradens paucidentatus, female, 35.9 x 27.0 mm (DABFUK), Agatti; C, Xiphonectes iranjae, male, 24.7 x 11.6 mm (DABFUK), Agatti; D, Euxanthus rugosus, juv. male, 10.3 x 6.8 mm) (DABFUK), Kavaratti, 7 January 2013; E, Juxtaxanthias lividus, male 43.5 x 27.2 mm (DABFUK), Kavaratti; F, Lachnopodus bidentatus, male, 14.0 x 9.3 mm (DABFUK), Minicoy; G, Macromedaeus crassimanus, male, 34.7 x 22.1 mm (DABFUK), Kavaratti, 10 October 2014; H, Percnon sp., megalopa, 6.9 x 5.1 mm (DABFUK), Kavaratti. Scale bar: 5.0 mm.
FIGURE 1 in On a collection of brachyuran crabs from Lakshadweep, Indian Ocean (Crustacea: Decapoda: Brachyura)
FIGURE 1. Map of Lakshadweep (India), with the constituent islands shown in pink. The inset shows the position of Lakshadweep (pink rectangle) relative to the rest of India.
FIGURE 7 in First records of some coral reef-associated brachyuran crabs from the Nicobar archipelago, India
FIGURE 7. Cyrtocarcinus truncatus (Rathbun, 1906), male (IO/SS/BRC/00193, 8.6 × 6.1 mm), Andaman Sea, India: (A) carapace, dorsal view; (B) carapace, frontal view; (C) right mxp3, ventral view; (D) left cheliped, lateral view; (E) left P2, dorsal view; (F) male pleon and telson, ventral view. Scale bars: A–B, F, 2 mm, C, E, 1 mm, D, 5 mm.
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