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6,771 results for “freshwater”
FIGURE 5 in A new species of freshwater isopod (Sphaeromatidea: Sphaeromatidae) from an inland karstic stream on Espíritu Santo Island, Vanuatu, southwestern Pacific
FIGURE 5. Exosphaeroides quirosi sp. nov., male. A, left maxillule, posterior (ornamentation of innermost three pappose distal robust setae of medial lobe omitted); B, right maxilliped, posterior (ornamentation of distal portion of endite and of corresponding robust setae omitted); C, detail of distal portion of endite of latter, with ornamentation of subdistal robust setae omitted; D, same, now showing ornamentation of subdistal robust setae.
FIGURE 1 in A new species of freshwater isopod (Sphaeromatidea: Sphaeromatidae) from an inland karstic stream on Espíritu Santo Island, Vanuatu, southwestern Pacific
FIGURE 1. Location of Fapon cave on Santo Island (Vanuatu), type locality of Exosphaeroides quirosi sp. nov.
FIGURE 2 in A new species of freshwater isopod (Sphaeromatidea: Sphaeromatidae) from an inland karstic stream on Espíritu Santo Island, Vanuatu, southwestern Pacific
FIGURE 2. Exosphaeroides quirosi sp. nov. A, male habitus, lateral; B, left antennule, dorsal; C, detail of process on distal segment of peduncle of latter, dorsal; D, left antennary peduncle, dorsal; E, detail of spinules covering medial surface of proximal segment of latter; F, antennary flagellum, dorsal.
FIGURE 3 in A new species of freshwater isopod (Sphaeromatidea: Sphaeromatidae) from an inland karstic stream on Espíritu Santo Island, Vanuatu, southwestern Pacific
FIGURE 3. Exosphaeroides quirosi sp. nov. A, male habitus, dorsal; B, frontal view of epistome, with rostrum and insertions of antennules and antennae; C, detail of proximal portion of head with epistome, antennules and antennae, dorsal; D, detail of labrum and lateral lobes of epistome, posterior; E, detail of spinule on distal margin of labrum; F, paragnaths; G, detail of distal spinule on latter; H, pleotelson, ventral; I, detail of right uropod, ventral.
FIGURE 4 in A new species of freshwater isopod (Sphaeromatidea: Sphaeromatidae) from an inland karstic stream on Espíritu Santo Island, Vanuatu, southwestern Pacific
FIGURE 4. Exosphaeroides quirosi sp. nov., male. A, right mandible, posteromedial; B, detail of distal portion of latter, posterior; C, same, medial; D, left mandible with palp omitted, medial; E, detail of incisor and lacinia of latter; F, left maxilla, anterior.
FIGURE 3 in A new species of the freshwater fish genus Astyanax (Ostariophysi: Characidae) from the rio Iguaçu basin, southeastern Brazil
FIGURE 3. Astyanax varzeae, paratype, MCP 40535, 68.2 mm SL, rio São João, rio da Várzea headwaters, an affluent of rio Negro, upper rio Iguaçu basin. In this exemplar, the anterior portion of the black midlateral stripe is expanded, forming a faint second humeral spot.
FIGURE 6 in A new species of the freshwater fish genus Astyanax (Ostariophysi: Characidae) from the rio Iguaçu basin, southeastern Brazil
FIGURE 6. Anova box-whisker plots of the orbital diameter as a percentage of head length in Astyanax varzeae, A. totae, A. cremnobates and A. brachypterygium. Significant differences using one-way analysis of variance test were found among the species (F=67.91, P=0.001). Mean represented by squares, and confidence intervals (95%) as lateral bars of box-whisker plots. Asterisks represent extreme values.
FIGURE 2 in A new species of the freshwater fish genus Astyanax (Ostariophysi: Characidae) from the rio Iguaçu basin, southeastern Brazil
FIGURE 2. Astyanax varzeae, holotype, MHNCI 11688, 83.1 mm SL, rio São João, rio da Várzea headwaters, an affluent of rio Negro, upper rio Iguaçu basin.
FIGURE 7 in A new species of the freshwater fish genus Astyanax (Ostariophysi: Characidae) from the rio Iguaçu basin, southeastern Brazil
FIGURE 7. Anova box-whisker plots of the snout length as a percentage of head length in Astyanax varzeae and A. paranae. Significant differences using one-way analysis of variance test were found among the species (F=11.18, P=0.001). Mean represented by squares, and confidence intervals (95%) as lateral bars of box-whisker plots. Asterisks represent extreme values.
FIGURE 5 in A new species of the freshwater fish genus Astyanax (Ostariophysi: Characidae) from the rio Iguaçu basin, southeastern Brazil
FIGURE 5. Orbital diameter as function of head length in Astyanax varzeae, A. totae, A. cremnobates and A. brachypterygium. Note that the confidence intervals (95%) do not overlap in A. varzeae, A. brachypterygium and A. cremnobates, indicating significant difference. In head lengths higher than 15.5 mm the 95% confidence intervals do not overlap in A. varzeae and A. totae.
FIGURE 4. Astyanax varzeae, MHNCI 9146 in A new species of the freshwater fish genus Astyanax (Ostariophysi: Characidae) from the rio Iguaçu basin, southeastern Brazil
FIGURE 4. Astyanax varzeae, MHNCI 9146. Lateral view of maxilla (top-left), premaxilla (top-right), and lower jaw (bottom).
FIGURES 16–17. Hydrothelphsua vencesi n in Hydrothelphusa vencesi, a new species of freshwater crab (Brachyura: Potamoidea: Potamonautidae) from southeastern Madagascar.
FIGURES 16–17. Hydrothelphsua vencesi n. sp., adult male holotype (cw 52 mm, ZMA De. 205976) from Vevembe, Fianarantsoa Province, Madagascar. 16, whole animal dorsal view; 17, detail of eyes and mouthparts, frontal view.
FIGURES 1–9. Hydrothelphsua vencesi n in Hydrothelphusa vencesi, a new species of freshwater crab (Brachyura: Potamoidea: Potamonautidae) from southeastern Madagascar.
FIGURES 1–9. Hydrothelphsua vencesi n. sp., adult male holotype (cw 52 mm, ZMA De. 205976) from Vevembe, Fianarantsoa Province, Madagascar. 1, carapace and eyes, dorsal view; 2, cephalothorax, carapace and eyes, frontal view; 3, right cheliped, frontal view; 4, left cheliped, frontal view; 5, carpus and merus of right cheliped, dorsal view; 6, merus of right cheliped, inferior view; 7, left third maxilliped; 8, sternum and abdomen; 9, abdomen pulled back to show first and second gonopods. Scale = 13 mm (1,2, 8, 9); 7 mm (3–7).
FIGURES 22–37. Pseudepistylis songi n in Establishment of a new peritrich ciliate genus, Pseudepistylis n. gen. (Ciliophora: Peritrichia: Epistylididae), with a description of a new freshwater species, Pseudepistylis songi n. sp. from Wenzhou, China
FIGURES 22–37. Pseudepistylis songi n. sp. protargol (22–29, 31–37) and silver nitrate (30) impregnation. 22, 25. Typical zooid. 23, 24. Peristomial disc and myonemal fibers. 26, 27. Infraciliature of oral apparatus. 28, 29. Myoneme system. 30. Pellicular striae. 31. Haplokinety and polykinety. 32, 34. Aboral ciliary wreath of telotroch. 33. Zooid showing macronucleus and micronucleus (arrow). 35. Aboral ciliary wreath of typical zooid. 36. Oral fiber. 37. Scopula. Arrows in 30, 32, 34, 35 indicate aboral ciliary wreath. Abbreviations: CRF, central ring fibers; F, filamentous reticulum; G, germinal kinety; H, haplokinety; LLF, long longitudinal fibers; P1–P3, infundibular polykineties 1–3; PDF, peristomial disc fibers; PLF, peristomial longitudinal fibers; Po, polykinety (peristomial continuation of P1); PRF, peristomial ring fibers; SLF, short longitudinal fibers. Scale bars: 50 μm (Fig. 25).
FIGURES 11–21. Pseudepistylis songi n in Establishment of a new peritrich ciliate genus, Pseudepistylis n. gen. (Ciliophora: Peritrichia: Epistylididae), with a description of a new freshwater species, Pseudepistylis songi n. sp. from Wenzhou, China
FIGURES 11–21. Pseudepistylis songi n. sp. in vivo. 11. Typical zooid. 12, 15, 18. Contracted zooid. 13, 14, 16, 17. Detached zooid. 19. Telotroch. 20. Stalk. 21. Newly divided zooids and stalk. Arrow in 11 indicates contractile vacuole; arrowheads in 12 and 14 indicate pellicular folds; arrows in 12 and 15 indicate food vacuoles; arrow in 13 indicates peristomial disc; arrow in 18 indicates macronucleus; arrow in 19 indicates aboral ciliary wreath. Scale bars: 100 μm (Fig. 11), 300 μm (Fig. 20).
FIGURES 1–7. Pseudepistylis songi n in Establishment of a new peritrich ciliate genus, Pseudepistylis n. gen. (Ciliophora: Peritrichia: Epistylididae), with a description of a new freshwater species, Pseudepistylis songi n. sp. from Wenzhou, China
FIGURES 1–7. Pseudepistylis songi n. sp. in vivo (1–4, 6), protargol impregnation (7), silver nitrate impregnation (5). 1. Typical zooid; arrow indicates micronucleus. 2. Telotroch. 3. Colony of eight zooids showing both extended and contracted states as well as structure of stalk. 4. Detached zooid; arrowheads mark pellicular folds. 5. General silverline system; arrows indicate aboral ciliary wreath. 6. Zooids at low magnification, showing varieties of body shape when contracted; arrowheads mark pellicular folds. 7. Myoneme system; arrows indicate aboral ciliary wreath. Abbreviations: CRF, central ring fibers; LLF, long longitudinal fibers; PDF, peristomial disc fibers; PLF, peristomial longitudinal fibers; PRF, peristomial ring fibers; SLF, short longitudinal fibers. Scale bars: 100μm (Fig. 1), 600 μm (Fig. 3).
FIGURES 8–10 in Establishment of a new peritrich ciliate genus, Pseudepistylis n. gen. (Ciliophora: Peritrichia: Epistylididae), with a description of a new freshwater species, Pseudepistylis songi n. sp. from Wenzhou, China
FIGURES 8–10. Infraciliature of oral apparatus of Pseudepistylis songi n. sp. following protargol impregnation. 8. Typical arrangement of three infundibular polykineties showing the short outer row of P3 (arrowhead) and the inner row of P3 (double-arrowhead). 9. An alternative arrangement of the three infundibular polykineties showing the short outer row of P3 (arrowhead), the shorter inner row of P3 (double-arrowhead) and the short additional branch of P2 (arrow). 10. General infraciliature of the oral apparatus. Abbreviations: F, filamentous reticulum; G, germinal kinety; H, haplokinety; P1–P3, infundibular polykineties 1–3; Po, polykinety (peristomial continuation of P1).
FIGURES 10–15. Hydrothelphsua vencesi n in Hydrothelphusa vencesi, a new species of freshwater crab (Brachyura: Potamoidea: Potamonautidae) from southeastern Madagascar.
FIGURES 10–15. Hydrothelphsua vencesi n. sp., adult male holotype (cw 52 mm, ZMA De. 205976) from Vevembe, Fianarantsoa Province, Madagascar. 10, right G1, ventral view; 11, right G1, dorsal view; 12, terminal article of right G1, dorsal view; 13, detail of tip of terminal article of right G1, dorsal view; 14, detail of tip of terminal article of right G1, dorsal view; 15, right first gonopod turned to show detail of tip of terminal article. Scale = 7 mm (10, 11); 2 mm (12–15).
FIGURE 15. Macrobrachium panamense Rathbun, 1912 in Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia
FIGURE 15. Macrobrachium panamense Rathbun, 1912, male, CRBMUV 81085: A, anterior part of body, lateral view; B, telson, dorsal view; C, second pereopod, lateral view.
FIGURE 12 in Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia
FIGURE 12. Macrobrachium heterochirus (Wiegmann, 1836), male, ICN-MHN-CR 1742: A, anterior part of body, lateral view; B, telson, dorsal view; C, second pereopod, lateral view.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.