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224 results for “Brachyuran crabs”
Fig. 5 in Two New Species of Spheroid Ectoparasitic Isopods (Epicaridea: Dajidae) Attached to the Antennules of Brachyuran Crab Hosts, with Description of a New Genus and Species of Hyperparasite (Epicaridea: Cryptoniscoidea)
Fig. 5. Akrophryxus acinaces sp. nov., paratype cryptoniscus larva (A–J; SMBL-V0651), SEM. A, Ventral view; B, lateral view; C, ventral view of cephalon showing antennules, mouthparts and first pereopods; D, right pereopod 2; E, left pereopod 3; F, right pereopod 4; G, right pereopods 5–7; H, lateral view of pereomeres 6 and 7 showing distinct notch and indentation; I, multifid setae of left pereopod 4; J, multifid setae of left pereopod 7; K, posterior end, ventral view. Scale bars: 100 µm (A, B); 50 µm (C, K); 30 µm (D–F); 20 µm (G); 10 µm (H–J).
Fig. 1 in Two New Species of Spheroid Ectoparasitic Isopods (Epicaridea: Dajidae) Attached to the Antennules of Brachyuran Crab Hosts, with Description of a New Genus and Species of Hyperparasite (Epicaridea: Cryptoniscoidea)
Fig. 1. Akrophryxus acinaces sp. nov., holotype (SMBL-V0649) and paratype (SMBL-V0652) females, attached to the right and left antennules of host, Pycnoplax surugensis (Rathbun, 1932), respectively; images taken while alive. A, Dorsal view; B, en-face view; C, close-up of paratype on left antennule; D, posterior view of holotype attached to host antennule; E, lateral view of holotype, removed from host; F, posterior view of holotype, removed from host. Scale bars: 3 mm (A, B); 1 mm (C–F).
Fig. 9 in Two New Species of Spheroid Ectoparasitic Isopods (Epicaridea: Dajidae) Attached to the Antennules of Brachyuran Crab Hosts, with Description of a New Genus and Species of Hyperparasite (Epicaridea: Cryptoniscoidea)
Fig. 9. Chimaeroniscus spheramator gen. et sp. nov., holotype cryptoniscus larva, ZRC 2022.0003. A, Dorsal view (specimen broken across pleomere 2); B, right antennule; C, left antenna; D, left pereopod 1; E, left pereopod 3; F, left pereopod 7; G, terminal pleomere, dorsal view; H, left uropod, dorsal view; I, left pleopod 2. Scale bars: 200 µm (A); 50 µm (B–I).
Fig. 8 in Two New Species of Spheroid Ectoparasitic Isopods (Epicaridea: Dajidae) Attached to the Antennules of Brachyuran Crab Hosts, with Description of a New Genus and Species of Hyperparasite (Epicaridea: Cryptoniscoidea)
Fig. 8. Akrophryxus pallipalicus sp. nov., allotype male (A–D), ZRC 2022.0002. A, Dorsal view; B, dorsal view; antenna; C, left antennule (A1), antenna (A2), and pereopod 1; D, right pereopod 6. Scale bars: 100 µm (A, B); 50 µm (C, D).
Fig. 3 in Two New Species of Spheroid Ectoparasitic Isopods (Epicaridea: Dajidae) Attached to the Antennules of Brachyuran Crab Hosts, with Description of a New Genus and Species of Hyperparasite (Epicaridea: Cryptoniscoidea)
Fig. 3. Akrophryxus acinaces sp. nov., paratype female (A, B: SMBL-V0652) and holotype female (C-M: SMBL-V0649). A, View of pereopods clutching host antennule (pereopods 1 and 5 labeled); B, view of pereopods, mouth (Mo), antenna (An), and oostegite 1 (O1); C, left pereopods 2–5, labeled with numbers; D, left pereopod 1, insets show scales and setae of pereopod 1; E, lateral view of left antenna; F, dorsal view of left antenna; G, left maxilliped, lateral view, arrow shows digitiform extension inserted in fold of oostegite 1 shown in I; H, left maxilliped, ventral view, arrow shows digitiform extension; I, left oostegite 1, lateral view showing fold where digitiform extension of maxilliped resides; J, left oostegite 1, ventral view; K, left oostegite 2; L, left oostegite 3; M, left oostegite 4. Scale bars: 500 µm (A, B); 250 µm (C–M); 10 µm (D inset).
Fig. 7 in Two New Species of Spheroid Ectoparasitic Isopods (Epicaridea: Dajidae) Attached to the Antennules of Brachyuran Crab Hosts, with Description of a New Genus and Species of Hyperparasite (Epicaridea: Cryptoniscoidea)
Fig. 7. Akrophryxus pallipalicus sp. nov., holotype female, ZRC 2022.0001, attached to antennule of Parapalicus armatus Castro, 2000 (ZRC 2016.0412). A, Lateral view; B, top down view; C, anterior view; D, lateral view of dissected specimen showing host antennule in-situ, circles indicate developing eggs in ovary; E, view of left antenna (An), mouth (Mo), and anterior end of keel (ke); F, left maxilliped, ventral view, arrow shows digitiform extension inserted in fold of oostegite 1 shown in I; G, left maxilliped, lateral view, arrow shows digitiform extension; H, left oostegite 1, lateral view showing fold where digitiform extension of maxilliped resides; I, left oostegite 1, ventral view; J, left pereopod 1 (inset shows scales); K, left pereopod 5. Scale bars: 500 µm (A–D); 1 mm (E); 250 µm (F–I); 50 µm (J, K); 10 µm (J inset).
Fig. 2 in Two New Species of Spheroid Ectoparasitic Isopods (Epicaridea: Dajidae) Attached to the Antennules of Brachyuran Crab Hosts, with Description of a New Genus and Species of Hyperparasite (Epicaridea: Cryptoniscoidea)
Fig. 2. Akrophryxus acinaces sp. nov., holotype female (SMBL-V0649) attached to Pycnoplax surugensis (Rathbun, 1932). A, Posterior view; B, lateral view; C, anterior view (opposite side to that shown in A), host antennule facing viewer; D, top down view; E, lateral view of dissect- ed specimen shown host antennule in-situ (Mo=Mouth), dashed circles show developing eggs in ovary; F, lateral view of dissected specimen with antennule removed, dashed circles show developing eggs in ovary; G, host antennule removed from holotype. Scale bars: 1 mm (A–F).
FIGURE 4 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 4. MicroCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. The external surface of the crab is translucent to show the position of the preserved internal structures that the scan detected. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles. A, dorsal view. B, frontal view. C, right lateral view. D, closeup of dorsal view. E, closeup of frontal view. F, closeup of right lateral view. G, closeup of left lateral view.
FIGURE 3 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 3. Exposed gills of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota and an interpretative drawing. 1-4: inferred number of gills;?af: possible afferent vessel.
FIGURE 1 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 1. Location of study area in South Dakota. A, paleobiogeographic map of most of North America during the Late Cretaceous (late Campanian) with the locality indicated by a red dot (modified from Sampson et al., 2010, figure 1). B, photo of the locality in Pennington County, South Dakota, USA, where the studied crab specimen was discovered. A massive limestone from the upper Campanian Didymoceras cheyennense ammonite Zone is located at the top of the hill on the right and many limestone pieces are found downslope.
FIGURE 2 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 2. The crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. A, carapace in dorsal view. B, closeups of the preserved gills in left branchial chamber. C, carapace in ventral view. D, carapace in frontal view.
FIGURE S3 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE S3. Rotating illustration of the microCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles; purple-pink: possible anterior gastric muscles. See online version for rotation (https://palaeo-electronica.org/content/2023/3973- soft-tissues-in-fossil-crab).
FIGURE 5 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 5. Rotating illustration (spin around the dorsal and ventral sides) of the microCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles. See online version for rotation (https://palaeo-electronica.org/content/2023/3973-soft-tissues-in-fossil-crab).
Fig. 1 in Short Communication Report of brachyuran crabs (Crustacea, Decapoda) from the Pliocene of Borgomanero, Novara (Piedmont, NW Italy)
Fig. 1 - Patella caerulea Linnaeus, 1758; specimens from the Borgomanero outcrop in dorsal and ventral views (1 – H: 16.7 mm; 2 – H: 13.8 mm; 3 – H: 15 mm).
Fig. 13 - MSNM i28017. Slab preserving some crab trackways crossing a in Anomuran and brachyuran trackways and resting trace from the Pliocene of Valduggia (Piedmont, NW Italy): environmental, behavioural, and taphonomic implications
Fig. 13 - MSNM i28017. Slab preserving some crab trackways crossing a series of smooth ripplemarks track and two vertical subrounded burrows (?Skolithos) (× 0.4).
Fig; 16 - MSNM i28026. Straight asymmetric wide trackway with an interior very light possible shell drag trace, diagnostic of fossil and extant land hermit crab walking traces (?Coenobichnus) (× 0.3). in Anomuran and brachyuran trackways and resting trace from the Pliocene of Valduggia (Piedmont, NW Italy): environmental, behavioural, and taphonomic implications
Fig; 16 - MSNM i28026. Straight asymmetric wide trackway with an interior very light possible shell drag trace, diagnostic of fossil and extant land hermit crab walking traces (?Coenobichnus) (× 0.3).
Fig. 11 - MSNM i28025. Chaotic crab trace showing a rapid endless sweeping structure fan from a in Anomuran and brachyuran trackways and resting trace from the Pliocene of Valduggia (Piedmont, NW Italy): environmental, behavioural, and taphonomic implications
Fig. 11 - MSNM i28025. Chaotic crab trace showing a rapid endless sweeping structure fan from a central subrounded bioturbation (?burrow) (× 0.8).
Fig. 6 in Multiple Environmental Factors Increase the Niche Complexity and Species Diversity of Brachyuran Crabs in an Intertidal Algal Reef Ecosystem in Northwestern Taiwan.
Fig. 6. The box plot of abundance of all crab species with a carapace width smaller than 10 mm across the six sites (A) and seasons (B) in the reef habitat. The core volumes are 950 cm3.
Fig. 2 in Multiple Environmental Factors Increase the Niche Complexity and Species Diversity of Brachyuran Crabs in an Intertidal Algal Reef Ecosystem in Northwestern Taiwan.
Fig. 2. The species compositions in all six study sites in the algal reef habitat. Each bar represents the total number of species recorded at each site. Family is the lowest taxonomic category in this figure.
Fig. 3 in Multiple Environmental Factors Increase the Niche Complexity and Species Diversity of Brachyuran Crabs in an Intertidal Algal Reef Ecosystem in Northwestern Taiwan.
Fig. 3. Relationship between the species richness and local contribution to beta diversity (LCBD) indexes among the six sites in the algal reef habitat.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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