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350 results for “Guiana Shield”
FIGURE 9 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 9. Holotype of Ancistrus kellerae in dorsal, lateral, and ventral views, CSBD F 1721, 69.9 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 2 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 2. Relevant morphometrics of species of Ancistrus. A. Head length vs. SL for the wide jawed species, A. amaris (dots) and A. yutajae (circles). B. Principal Components Analysis for the flat species, A. leoni (gray dots), A. lithurgicus (black dots), and A. macropthalmus (triangles). PC2 was affected most strongly and positively by Dorsal-Pelvic Distance, Snout Length, and Thorax Length and most strongly and negatively by Head-Eye Length, Interorbital Width, and Head-Pectoral Length. PC3 was affected most strongly and positively by Premaxillary Tooth Cup Length, Internares Width, and Dorsal-Pelvic Distance, and most strongly and negatively by Pelvic-Dorsal Distance, Adipose Spine Length, and Adipose-Upper Caudal Distance. C. PCA of A. kellerae and A. nudiceps by drainage. PC2 was affected most strongly and positively by Eye Length, Dorsal-Anal Distance, and Dorsal Spine Length, and most strongly and negatively by Interorbital Width, Adipose-Spine Length, and Orbit Diameter. PC4 was affected most strongly and positively by Adipose-anal Distance, Dorsal-Pelvic Distance, and Dorsal-Anal Distance, and most strongly and negatively by Dentary Tooth Cup Length, Internares Width, and Premaxillary Tooth Cup Length. D. Number of Hypertrophied Cheek Odontodes by SL in species of the A. nudiceps group.
FIGURE 1 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 1. Ancistrus nudiceps, lateral and anterior views, AUM 35623, 138.4 mm SL. Photos by M.H. Sabaj.
FIGURE 5 in Taxonomic revision of the Erythrolamprus reginae species group, with description of a new species from Guiana Shield (Serpentes: Xenodontinae)
FIGURE 5. Dorsal and lateral views of head; dorsal, ventral and lateral views of midbody; and ventral and lateral views of tail of Erythrolamprus zweifeli (AMNH 137302—A), E. dorsocorallinus (MZUSP 7362—B), and E. rochai (MPEG 25680 -C). Scale Bar = 10 mm.
FIGURE 2 in Taxonomic revision of the Erythrolamprus reginae species group, with description of a new species from Guiana Shield (Serpentes: Xenodontinae)
FIGURE 2. Dorsal and lateral views of head; dorsal, ventral and lateral views of midbody; and ventral and lateral views of tail of Erythrolamprus reginae (RMNH 13662—A), E. oligolepis (MPEG 25180—B), and E. macrosomus (FUNED 802—C). Scale Bar = 10 mm.
FIGURE 8 in Taxonomic revision of the Erythrolamprus reginae species group, with description of a new species from Guiana Shield (Serpentes: Xenodontinae)
FIGURE 8. Geographic distribution of the Erythrolamprus reginae species group. White symbols for each species represents literature records; red symbols for each species represents the type localities of each species; the other symbols and colors refer to the specimens examined in first hand.
FIGURE 4 in Taxonomic revision of the Erythrolamprus reginae species group, with description of a new species from Guiana Shield (Serpentes: Xenodontinae)
FIGURE 4. Dorsal (left) and ventral (right) views of the topotype of Erythrolamprus macrosomus (MCP 13063; SVL= 557 mm—A), holotype of Leimadophis zweifeli (MBUCV 95; SVL= 447 mm—B), holotype of Liophis dorsocorallinus (ULABG 6691; SVL= 474 mm—C), and holotype of Liophis miliaris intermedius (ZFMK 34243a; SVL= 340 mm—D). Photos by M. Rivera (A), E. La Marca (B), and M. Franzen (D).
FIGURE 3 in Taxonomic revision of the Erythrolamprus reginae species group, with description of a new species from Guiana Shield (Serpentes: Xenodontinae)
FIGURE 3. Sulcate (left) and asulcate (right) views of the hemipenis of Erythrolamprus reginae (RMNH 42042—A), E. oligolepis (MPEG 23979—B), E. macrosomus (CEPB 2125—C), E. zweifeli (AMNH 137302—D), E. dorsocorallinus (UFAC 129—E), and E. rochai (MPEG 25681—F). Scale Bar = 5 mm.
FIGURE 7 in Taxonomic revision of the Erythrolamprus reginae species group, with description of a new species from Guiana Shield (Serpentes: Xenodontinae)
FIGURE 7. Dorsal (A) and ventral (B) views of midbody; dorsal (C), ventral (D) and lateral (E) views of head; and lateral view of tail (F) of the holotype of Erythrolamprus rochai (MPEG 25680). Scale Bar = 10 mm.
FIGURE 6 in Taxonomic revision of the Erythrolamprus reginae species group, with description of a new species from Guiana Shield (Serpentes: Xenodontinae)
FIGURE 6. General aspect of individuals in life of Erythrolamprus reginae from Trésor reserve, French Guiana (A), E. oligolepis from Maués, Amazonas, Brazil (B); E. macrosomus from San Sebastian de La Selva, Misiones, Argentina (C); E. zweifeli from Parque Nacional Henri Pittier, Rancho Grande, Aragua, Venezuela (D); E. dorsocorallinus from Boca Pariamanu, Peru (E); and E. dorsocorallinus from Barinas, Venezuela (F). Photos by Trésor Foundation (A), P. Peloso (B), J. Chiavo (C), J. Mejías (D), S. de Jong (E), and D. Sandoval (F).
FIGURE 1 in Taxonomic revision of the Erythrolamprus reginae species group, with description of a new species from Guiana Shield (Serpentes: Xenodontinae)
FIGURE 1. Dorsal (left) and ventral (right) views of the lectotype (NRM 44; SVL= 185 mm—A) and paralectotype of Coluber reginae (NRM 45; SVL= 165 mm—B), holotype of Coluber graphicus (BMNH 1946.1.5.73b; SVL= 340 mm—C), lectotype of Natrix semilineata (ZSM 1832-0-1; SVL= 375 mm—D); and holotype of Liophis oligolepis (BMNH 1946.1.4.66; SVL= 247 mm—E). Photos by B. Kajrup (B), P. Campbell (C, E), and M. Franzen (D).
FIGURE 6 in A new species of Cetopsis from the Guiana Shield (Siluriformes: Cetopsidae: Cetopsinae)
FIGURE 6. Ventral view of the ethmoid region of skull and associated structures of Cetopsis aspis MZUSP 125262. LE: Lateral ethmoid; ME: mesethmoid; ORB: orbitosphenoid; PAR: parasphenoid; PMX: premaxilla; V: vomer. Scale bar = 1mm.
FIGURE 7 in A new species of Cetopsis from the Guiana Shield (Siluriformes: Cetopsidae: Cetopsinae)
FIGURE 7. Ventral view of the weberian apparatus of Cetopsis aspis, MZUSP 125262. AVP: anterior ventral transverse process of a complex centrum; CC: complex centrum; OS: os suspensorium; PAP n: parapophysis of vertebra n; PVP: posterior ventral transverse process of a complex centrum; VC n: vertebral centrum n; WL: weberian lamina. Scale bar = 1 mm.
FIGURE 3 in A new species of Cetopsis from the Guiana Shield (Siluriformes: Cetopsidae: Cetopsinae)
FIGURE 3. Map showing the distribution of Cetopsis aspis. Square represents the type locality, Mauritie Creek, upper Commewijne River basin, Sipaliwini District, Suriname. Circles represent the localities of paratypes, Konawaruk River and tributaries, Essequibo River basin, Guyana.
FIGURE 2 in A new species of Cetopsis from the Guiana Shield (Siluriformes: Cetopsidae: Cetopsinae)
FIGURE 2. Cetopsis aspis, paratype, USNM 432559, 46.9 mm SL, immediately after capture. Photo: Aniel Gangadin.
FIGURE 5 in A new species of Cetopsis from the Guiana Shield (Siluriformes: Cetopsidae: Cetopsinae)
FIGURE 5. Strict consensus tree of relationships of the family Cetopsidae with Cetopsis aspis sp. nov. included. Tree length, 279 steps, R, 0.82, C.I., 0.44.
FIGURE 4 in A new species of Cetopsis from the Guiana Shield (Siluriformes: Cetopsidae: Cetopsinae)
FIGURE 4. Type locality of Cetopsis aspis. Mauritie Creek, upper Commewijne River basin, Sipaliwini District, Suriname. The grey-white color of the water is caused by suspended sediments resulting from activities of gold miners 100 m upstream of the collection site.
FIGURE 7 in A new species of Cetopsis from the Guiana Shield (Siluriformes: Cetopsidae: Cetopsinae)
FIGURE 7. Ventral view of the weberian apparatus of Cetopsis aspis, MZUSP 125262. AVP: anterior ventral transverse process of a complex centrum; CC: complex centrum; OS: os suspensorium; PAPn: parapophysis of vertebra n; PVP: posterior ventral transverse process of a complex centrum; VCn: vertebral centrum n; WL: weberian lamina. Scale bar = 1 mm.
FIGURE 7 in A new species of Cetopsis from the Guiana Shield (Siluriformes: Cetopsidae: Cetopsinae)
FIGURE 7. Ventral view of the weberian apparatus of Cetopsis aspis, MZUSP 125262. AVP: anterior ventral transverse process of a complex centrum; CC: complex centrum; OS: os suspensorium; PAP n: parapophysis of vertebra n; PVP: posterior ventral transverse process of a complex centrum; VC n: vertebral centrum n; WL: weberian lamina. Scale bar = 1 mm.
Fig. 8 in Back from the deaf: integrative taxonomy revalidates an earless and mute species, Hylodes grandoculis van Lidth de Jeude, 1904, and confirms a new species of Pristimantis Jiménez de la Espada, 1870 (Anura: Strabomantidae) from the Eastern Guiana Shield
Fig. 8 Volumetric renderings of µ-CT scans of the skull (in lateral view) of the holotype of Pristimantis grandoculis (a; RMNH 4467), a specimen of P. grandoculis from Suriname (b; MNHN-RA-2020.0118), the holotype of P. marmoratus (c; BMNH 1947.2.16.92), and the holotype of P. crepitaculus sp. nov. (d; MNHN- RA-2020.0102). Absence/presence of columellae (highlighted in red) is pointed by a red arrow
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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)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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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.