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38 results for “Euphanerops”
FIG. 17 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 17. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; "braincase" and "head stains" of MHNM 01-123: photograph (A, in immersion in water) and camera lucida drawing (B) of the area framed in C. Scale bar: 10 mm.
FIG. 5 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 5. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; specimen MHNM 01-123 showing an extensively mineralized skeleton (see also Figure 16 for details), and photographed in immersion in alcohol in order to enhance the carbonaceous imprint of the non-mineralized tissues of the body and the "head stains" (dark zones at the anterior end of the head and in the dorsal half of the body). Scale bar: 50 mm.
FIG. 14 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 14. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; anterior part of the head in two small, dorsoventrally collapsed individuals: A, MHNM 01-137; B, MHNM 01-158, notice the presence of two small patches of mineralized matter in exactly the same position as in MHNM 01-126A (see Figure 13B). Scale bar: 5 mm.
FIG. 2 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 2. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; holotype (BMNH P.6813): A, photograph of one part of the specimen (P.6813a); B, explanatory drawing; C, camera lucida drawing of the anterior end of the specimen (framed in B). Scale bars: A, B, 10 mm; C, 1 mm. B, C, after Arsenault & Janvier 1991: figs 2a; 3a, abbreviations modified.
FIG. 1 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 1. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; holotype (BMNH P.6813), facsimile of Woodward's (1900) original illustration (part and counterpart ["1a"], and detail of a "scale" ["1b"]). Notice the upside down orientation of the specimen, as the caudal fin was thought to be epicercal. Original abbreviations: o, orbits; c, caudal fin; d, dorsal fin.
FIG. 11 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 11. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada: transverse (A) and longitudinal (B) sections through the "white line" of MHNM 01-123. Optical micrograph in normal light. Scale bars: 0.1 mm.
FIG. 19 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 19. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; imperfectly preserved specimen, presumably collapsed more or less dorsoventrally, and showing the sinuous gill arches and possible imprints of afferent branchial blood vessels; specimen MHNM 01-150; part (A) and counterpart (B), photographed in immersion in water. Framed areas in A are illustrated in Figure 20C, D. Scale bars: 10 mm.
FIG. 21 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 21. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada: photograph (A) and camera lucida drawing (B) of the mid-dorsal part of the body of MHNM 01-123 (area framed in C). Scale bar: 10 mm.
FIG. 16 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 16. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; large, laterally or ventrolaterally collapsed specimen (the "braincase" is probably twisted in an either ventral or dorsal aspect), showing and extensively mineralized endoskeleton (MHNM 01-123, same specimen as in Figure 5). Photographed dry. Scale bar: 50 mm.
FIG. 13 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 13. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; small and presumably juvenile, dorsoventrally collapsed individuals, showing the three "head stains"; photographed in immersion in water: A, MHNM 01-89B, single specimen, the body of which is interrupted by a break in the concretion; the sediment that fills the presumed, horizontally broken, stomach contents is extremely fine-grained, and clearly differs from that of the surrounding matrix; B, MHNM 01-126A, smallest known individual, showing a pair of stains (one of which displays a slight trace of mineralized matter) behind the "head stains". Scale bars: A, 10 mm; B, 1 mm.
FIG. 3 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 3. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada: part (A) and counterpart (B1) of a complete specimen presumably collapsed in lateral aspect [MHNM 01-02, designated by Arsenault & Janvier (1991) as the holotype of Legendrelepis parenti], photographed in immersion in water, and explanatory drawing based on the counterpart (B2). Scale bar: 10 mm. B2, from Arsenault & Janvier 1991, abbreviations modified.
FIG. 9 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 9. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; attempted three-dimensional reconstruction of the structure of a mineralized gill arch (the transverse section is slightly oblique, to show the more spherical shape of the internal chondrocyte spaces). Scale bar: 1 mm.
FIG. 8 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 8. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; sections through mineralized endoskeletal elements sampled from MHNM 01-135A; A, longitudinal (below) and transverse (above) sections through "gill rods"; B, C, portion of one of the "gill rods" in A, optical micrograph in normal light (B) and Nomarski interference optical micrograph (C); D, E, portion of a larger elongated element (presumably a gill arch) optical micrograph in normal light (D) and Nomarski interference optical micrograph (E); F, G, transverse sections through a "gill rod" (F) and a larger elongated element, presumably a gill arch (G); optical micrograph in normal light. Scale bars: 100 µm.
FIG. 4 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 4. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada;specimens photographed in immersion in water,and showing the characteristic aspect of the anterior part of the head when collapsed in lateral aspect, with the "head stains" overhanging the anterior limit of the branchial apparatus: part (A) and counterpart (B) of an imperfect specimen (MHNM 01-69A,B), designated by Arsenault & Janvier (1991) as the paratype of Legendrelepis parenti (see details of the "head stains" in Figure 38); C, imperfect specimen (MHNM 01-130). Scale bars: 10 mm.
FIG. 7 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 7. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; sections through mineralized endoskeletal elements sampled from MHNM 01-135A (A, D, E, optical micrographs in normal light; B, C, Nomarski interference optical micrographs): A, transverse section through a "copular element"; B, detail view of a different zone of the same sample showing transverse sections of "chondrocyte spaces" with well marked growth lines; C, detail view of the area framed in B, showing the thinner growth lines in the "mineralized territorial matrix"; D, Section through an assemblage comprizing a "gill rod" (left) and isolated "chondrocyte space" shells; note the typically dark stain of most of the elongated elements, notably "gill rods"; E, section through an isolated "chondrocyte space" shell showing microfractures (arrowheads). Scale bars: 100 µm.
FIG. 15 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 15. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; camera-lucida drawings of the "head stains" in all known specimens that are regarded as being dorsoventrally collapsed: A, MHNM 01-126; B, MHNM 01-158; C, MHNM 01-137; D, MHNM 01-98; E, MHNM 01-101A; F, MHNM 01-89A, B; G, MHNM 01-136; H, MHNM 01-125A. Scale bar: 5 mm.
FIG. 12 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 12. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada: A, almost complete specimen, the head of which is dorsolaterally collapsed and shows the three head stains (MHNM 01-98); B, detail of the anterior part of the head of the same specimen. Photographed in immersion in water. Scale bars: 5 mm.
FIG. 18 in The anatomy of Euphanerops longaevus Woodward, 1900, an anaspid-like jawless vertebrate from the Upper Devonian of Miguasha, Quebec, Canada
FIG. 18. — Euphanerops longaevus Woodward, 1900; Escuminac Formation, lower Frasnian (Upper Devonian), Miguasha, Quebec, Canada; detail of the anterior part of the head of MHNM 01-02 (same specimen as in Figure 3): part (A) and counterpart (B), photographed in immersion in water. Scale bar: 5 mm.
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