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1,093 results for “Arthropods”
Fig. 1 in Ecological interactions between arthropods and small vertebrates in a lowland Amazon rainforest
Fig. 1. (A) The spider Ancylometes sp. (Ctenidae) preying upon an adult Dendropsophus leali; (B) the spider Phoneutria sp. (Ctenidae) preying on a sub-adult Hamptophryne boliviana. Photos by Emanuele Biggi (A) and Francesco Tomasinelli (B).
Fig. 4 in Ecological interactions between arthropods and small vertebrates in a lowland Amazon rainforest
Fig. 4. The spider Ctenus sp. (Ctenidae) preying upon a subadult Cercosaura eigenmani. Photo by Mark Cowan.
Fig. 3 in Ecological interactions between arthropods and small vertebrates in a lowland Amazon rainforest
Fig. 3. (A) A theraphosid spider, cf. Pamphobeteus sp. (Theraphosidae), preying upon Hamptophryne boliviana; (B) a ctenid spider (Ctenidae) preying upon Leptodactylus didymus. Photos by Emanuele Biggi (A) and Pascal Title (C).
Fig. 2 in Ecological interactions between arthropods and small vertebrates in a lowland Amazon rainforest
Fig. 2. (A) The fishing spider Thaumasia sp. (Pisauridae) preying upon a tadpole (unidentified) at a temporary pond located in terra firme forest; (B) a ctenid spider (genus undetermined; Ctenidae) preying upon a subadult Boana sp. G. Photos by Emanuele Biggi (A) and Francesco Tomasinelli (B).
Figure 3. Limnocoris submontandoni testis with clomazone 162 in Ecotoxicological effects of commercial herbicides on the reproductive system of aquatic arthropod Limnocoris submontandoni (Hemiptera: Naucoridae)
Figure 3. Limnocoris submontandoni testis with clomazone 162 mg / L, (A) Apparent enlargement of the testicular interstice and degeneration of some spermatoids (SPTI), with normal concentrations of spermatozoa (SPTZ) in the outer regions, (B) spermatocytes (SPTO) with normal appearance and sperm (SPTZ) with slight alteration of spermatids (SPTI), C) profusion of sperm (SPTZ) with a high degree of compaction, indicating high rates of spermatogenesis and integrity of tubular cells (arrowhead). Dye: Toluidine Blue.
Figure 1 in Ecotoxicological effects of commercial herbicides on the reproductive system of aquatic arthropod Limnocoris submontandoni (Hemiptera: Naucoridae)
Figure 1. Photomicrographs of the control group of Limnocoris submontandoni, (A) helical distribution of the seminiferous tubule with germ cells, spermatogonia (SPGO), spermatocytes (SPTO), spermatids (SPTI), sperms (SPTZ), (B) spermatocytes (SPTO) and spermatids (SPTI) in different degrees of maturation, (C) spermatocytes (SPTO) with slightly colored areas (*) displaced to one of the cell poles, spermatids (SPTI) with different degrees of maturation, acrosome vesicle (arrows), elongation of slightly colored structures (**), elongated cells forming the tubular wall (arrowhead), core (n), (D) Spermatids (SPTI) in different degrees of maturation, spermatozoa (SPTZ) forming compact bundles and very elongated nucleus, nucleus (n) and acrosome vesicles (arrows) of some spermatoids and (E) Compact sperm bundles (SPTZ), sperm nuclei (n), tubular wall cells (arrowhead) and tracheole (tr). Dye: Toluidine Blue.
Fig. 5 in New data on the anatomy of fuxianhuiid arthropod Guangweicaris spinatus from the lower Cambrian Guanshan Biota, Yunnan, China
Fig. 5. Artistic reconstruction of Guangweicaris spinatus Luo, Fu, and Hu, 2007 from the lower Cambrian Guanshan Biota, China. Illustration by Xiaodong Wang (Yunnan Zhishui Corporation, Kunming, China).
Fig. 1 in New data on the anatomy of fuxianhuiid arthropod Guangweicaris spinatus from the lower Cambrian Guanshan Biota, Yunnan, China
Fig. 1. Tergal morphology of fuxianhuiid arthropod Guangweicaris spinatus Luo, Fu, and Hu in Luo et al., 2007 from the lower Cambrian Guanshan Biota, China. A. YKLP 11564a, a nearly complete specimen in dorsal view, showing three prothoracic tergites, five opisthothoracic tergites and seven abdominal tergites. B. YIGS Kgs-1-36 (paratype), prothoracic tergites in dorsal view. C. YIGS Kgs-1-37 (paratype), isolated opisthothoracic tergite in dorsal view. D. YKLP 11140, last two prothoracic and five opisthothoracic tergites in lateral view, appendages are detached from the body. E. YKLP 11162b, last prothoracic, five opisthothoracic and first two abdominal tergites in lateral view.
Fig. 4 in New data on the anatomy of fuxianhuiid arthropod Guangweicaris spinatus from the lower Cambrian Guanshan Biota, Yunnan, China
Fig. 4. Carapace and appendages of fuxianhuiid arthropod Guangweicaris spinatus Luo, Fu and Hu, 2007 from the lower Cambrian Guanshan Biota, China. A. YKLP 11201, detached carapace in ventral view and the organization of head appendages (A1); close-up of the head appendages (A2, photograph; A3, explanatory drawing); white arrows, the lateral lobes of the hypostome; black arrow, the possible section in SPA; close-up of the spinose medial margin of the SPA (A4), white arrows indicate the spinose medial margin. B. NIGPAS Kgs-1-137, nearly complete body with well-preserved appendages in lateral view; white arrows, the anterior appendages; black arrows, the appendages belonging to the first and second opisthothoracic segments; white arrowheads, lateral subpentagonal spines of an endopod; black arrowheads, the attachments of the proximal podomeres of appendages. C. YKLP 11202, opisthothoracic appendages in dorsal view; black arrow, the terminal subtriangular podomere; white arrowheads, lateral subpentagonal spines of an endopod; black arrowheads, the attachments of the proximal podomeres of appendages. D. NIGPAS Kgs-6-108 the carapace, antennae and trunk appendages in ventral view (D1), close-up of trunk appendages showing 11 podomeres in the endopod of one biramous appendage (D2), arrowheads point to hollow nodes that indicate the insertions of the spines along the inner margin of the endopod. Images B, C courtesy of Shixue Hu (Chengdu Centre of the Geological Survey of China, Chengdu, China).
Fig. 2 in New data on the anatomy of fuxianhuiid arthropod Guangweicaris spinatus from the lower Cambrian Guanshan Biota, Yunnan, China
Fig. 2. Terminal abdominal tergite and associated structures of fuxianhuiid arthropod Guangweicaris spinatus Luo, Fu, and Hu, 2007 from the lower Cambrian Guanshan Biota, China. A. YIGS Kgs-1-62 (paratype), incomplete abdomen in lateral view. B. NIGPAS Kgs-1-137, nearly complete specimen in lateral view (B1), close-up (B2). Arrows indicate the position of the posteroventral spine. C. YKLP 11566, complete trunk and telson in lateral view C1), close-up (C2), explanatory drawing (C3), white arrows, outer spines; black arrows, inner spines. Image B courtesy of Shixue Hu (Chengdu Centre of the Geological Survey of China, Chengdu, China).
FIGURE 3. Quantitative burrow properties. A in Linking burrow morphology to the behaviors of predatory soil arthropods: Applications to continental ichnofossils
FIGURE 3. Quantitative burrow properties. A) Measurements were taken for number of surface openings (SO), burrow slope (S), maximum depth (D), total length (L), tunnel, shaft, and chamber width (w), height (h), and circumference (c), and branching angles (BA). B) Complexity includes the number of segments (s), chambers (h), and surface openings (e) within a single burrow system. C) Tortuosity of a single burrow segment is found by dividing the total length (u) by the straight-line distance (v) from end to end. Modified from Hembree (2019).
FIGURE 7 in Linking burrow morphology to the behaviors of predatory soil arthropods: Applications to continental ichnofossils
FIGURE 7. Burrow morphology: architecture and bioglyphs. A) Simple subhorizontal burrow of Hadrurus arizonensis with a single entrance. B) Helical subhorizontal burrow of H. arizonensis with a single entrance. C) Simple subhorizontal burrow of Pandinus imperator with a single entrance. D) Branching subhorizontal burrow of P. imperator with a single entrance. E) Branching, helical burrow of P. imperator with a large terminal chamber (at arrow). F) Mazework of H. arizonensis with multiple branches and two entrances (at arrows). G) Multiple, fine striations (at arrows) along, and parallel to, the shaft of a Gorgyrella inermis burrow. H) Pair of protrusions (at arrows) on the roof of a terminal chamber of Mastigoproctus giganteus. I) Large striations (at arrows) along the side of a subhorizontal burrow of Aphonopelma chalcodes. J) Burrow opening of Hogna lenta showing silk and sediment lining (at arrow). K) Compression lining (at arrow) visible in a cross section of a tunnel of Scolopendra polymorpha.
FIGURE 6 in Linking burrow morphology to the behaviors of predatory soil arthropods: Applications to continental ichnofossils
FIGURE 6. Burrow morphology: openings and architecture. A) Elliptical burrow opening of Scolopendra polymorpha. B) Circular burrow opening of Hysterocrates gigas surrounded by a mound of excavated sediment. C) Paired triangular burrow openings of Pandinus imperator. D) Simple vertical burrow of Gorgyrella inermis with a single entrance. E) Vertical branching burrow of Pelinobus muticus with a single entrance. F) Vertical burrow Hysterocrates gigas with large terminal chamber and a single entrance. G) Subvertical helical burrow of Aphopelma chalcodes with a single entrance. H) J-shaped burrow of Mastigoproctus giganteus with a single entrance. I) U-shaped burrow of M. giganteus with two entrances. J) Y-shaped burrow of M. giganteus with two entrances. K) Mazework of M. giganteus with five entrances (at numbers). L) U-shaped burrow of S. polymorpha with two entrances. M) Mazework of S. polymorpha with four entrances (at numbers).
FIGURE 4. Burrowing techniques observed among the studied arthropod predators. A in Linking burrow morphology to the behaviors of predatory soil arthropods: Applications to continental ichnofossils
FIGURE 4. Burrowing techniques observed among the studied arthropod predators. A) Initial burrowing by intrusion by Scolopendra polymorpha (burrow opening at arrow). B) Burrowing by intrusion by Hogna lenta. C) Continued construction of a vertical shaft by compression by Gorgyrella inermis, compressing sediment along burrow boundary (at arrow) to increase the width. D) Subsurface tunnel construction by intrusion by Hemiscolopendra marginata. No sediment is removed as the tunnel is extended but is pressed against the tunnel boundary (at arrow). E) Burrowing by excavation by Mastigoproctus giganteus. Sediment is removed and carried with the pedipalps (at arrow). F) Burrowing by excavation by Pelinobus muticus. Sediment is removed and carried with the pedipalps (at arrow). G) Burrowing by excavation by Hadrurus arizonensis. Sediment is scraped and kicked back out (at arrow) of the developing burrow with the first two pairs of legs. H) Backfilling of a tunnel by S. polymorpha. The centipede removes sediment from the developing tunnel and uses it to fill the old tunnel (at arrow). I) Light silk lining around the opening, shaft, and chamber (at arrows) of Hysterocrates gigas. J) Thick silk lining around the shaft (at arrow) of G. inermis producing a smooth interior surface. K) Six silk runners (example at arrow) connected to the burrow entrance of G. inermis with a closed trap door.
FIGURE 2 in Linking burrow morphology to the behaviors of predatory soil arthropods: Applications to continental ichnofossils
FIGURE 2. Examples of experimental enclosures used in this study. A) Surface view of a 212 L enclosure before the introduction of the study animal. Objects were placed on the surface to encourage burrowing. B) Side view of a 246 L enclosure filled with 60 cm of an organic rich clay loam. C) A 212 L enclosure filled with 55 cm of an organic-rich clay loam. Five specimens of Pandinus imperator produced a branching burrow complex in the subsurface (at arrow). D) Plaster-filled, connected U-shaped burrows produced by Mastigoproctus giganteus in a 38 L enclosure filled with an organic-rick clay loam.
FIGURE 1 in Linking burrow morphology to the behaviors of predatory soil arthropods: Applications to continental ichnofossils
FIGURE 1. Burrowing arthropod predators investigated in this study. A) Scolopendra viridis, B) Scolopendra polymorpha, C) Hemiscolopendra marginata, D) Hadrurus arizonensis, E) Smeringurus mesaensis, F) Uroctonus mordax, G) Heterometrus spinifer, H) Pandinus imperator, I) Mastigoproctus giganteus, J) Hogna lenta, K) Gorgyrella inermis, L) Myrmekiaphilia sp., M) Aphonopelma chalcodes, N) Hysterocrates gigas, and O) Pelinobus muticus.
Figure 2 in The influence of distance from crushed stone mining on surface-active arthropods and soil chemical properties
Figure 2. Principal coordinates analyses (PCO) of the composition of soil chemical properties across sampling points from A, Blue Rock and B, Ikwezi mining sites. Grey triangles = 5 m, circles = 30 m, squares = 50 m, and open triangles = 70 m from the mining activities.
Figure 1 in The influence of distance from crushed stone mining on surface-active arthropods and soil chemical properties
Figure 1. Study sites showing sampling points (5 m, 30 m, 50 m and 70 m) from the mining activities at Blue Rock and Ikwezi mining sites.
Figure 3 in The influence of distance from crushed stone mining on surface-active arthropods and soil chemical properties
Figure 3. Effect of distance from the mining sites on the mean values of zinc. A, Blue Rock and B, Ikwezi mining site.
Figures 2-4 in A scorpion from a peatbog: the first arthropod fossil from the Late Viséan of the Moscow Coal Basin
Figures 2-4: Scorpion leg segment (PIN no. 5072/1). 2. Leg segment showing scale at 1 mm, dorsal view. 3. Details of basal joint, ventral view. 4. Close-up of denticles, dorsal view. Leg segment orientation is based on a scorpion positioned vertically with prosoma facing upwards and metasoma facing downwards.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.