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meraspis

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Figure 4. Small (A) to large (L) specimens of Triarthrus becki. A, Meraspis, NYSM 16781, Cephalic length (CL) = 0.97 mm. B, Meraspis, NYSM 16782, CL = 1.13 mm. C, Meraspis, NYSM 16783, CL = 1.31 mm. D, Meraspis, NYSM 16784, CL = 1.41 mm. E, Meraspis, NYSM 16785, CL = 1.49 mm. F, Meraspis, NYSM 17058, CL = 1.72 mm. G, Meraspis, NYSM 17059, CL = 1.91 mm. H, Meraspis, NYSM 17060, CL = 2.13 mm. I, Holaspis, NYSM 17061, CL = 3.10 mm. J, Holaspis, NYSM 17062, CL = 4.25 mm. K, Holaspis, NYSM 17063, CL = 5.39 mm. L, Holaspis, NYSM 17064, CL = 6.42 mm. These 12 specimens are reposited in the New York State Museum as hypotypes
Published: 01 January 2002
Figure 4. Small (A) to large (L) specimens of Triarthrus becki . A, Meraspis, NYSM 16781, Cephalic length (CL) = 0.97 mm. B, Meraspis, NYSM 16782, CL = 1.13 mm. C, Meraspis, NYSM 16783, CL = 1.31 mm. D, Meraspis, NYSM 16784, CL = 1.41 mm. E, Meraspis, NYSM 16785, CL = 1.49 mm. F, Meraspis, NYSM
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Drevermannia antecurvata sp. nov., upper Famennian (to V), lower part of the Breternitz Member, Breternitz locality, Thuringia, Germany. All figures are scanning electron micrographs of silicified specimens. Scale bars 0.5 mm. (a–h) Cranidia, dorsal views. (a) Smallest meraspis, MB.T.4867.1. (b) Meraspis, MB.T.4867.2. (c) Meraspis, MB.T.4867.3. (d) Meraspis, MB.T.4867.4. (e) Meraspis, MB.T.4867.5. (f) Holaspis (?), MB.T.4867.6. (g) Large holaspis, MB.T.4867.7. (h) Holotype, large holaspis, MB.T.4867.8. (i) Right librigena, ventral view, MB.T.4867.9. (j–n) Librigenae, dorsal views. (j) Smallest specimen, MB.T.4867.10. (k) MB.T.4867.11. (l) MB.T.4867.12. (m) MB.T.4867.13. (n) Largest specimen, MB.T.4867.14. (o, p) Hypostomes, ventral views. (o) Small specimen, MB.T.4867.15. (p) Large specimen, MB.T.4867.16. (q–w) Transitory pygidia and pygidia, dorsal views. (q) Smallest meraspis, MB.T.4867.17. (r) Meraspis, MB.T.4867.18. (s) Meraspis, MB.T.4867.19. (t) Meraspis (?), MB.T.4867.20. (u) Holaspis, MB.T.4867.21. (v) Holaspis (right side broken), MB.T.4867.22. (w) Largest holaspis (left anterior part broken), MB.T.4867.23. (x, y) Transitory pygidium and pygidium, ventral views. (x) Meraspis, MB.T.4867.24. (y) Holaspis, MB.T.4867.25.
Published: 01 January 2006
Figure 7. Drevermannia antecurvata sp. nov., upper Famennian (to V), lower part of the Breternitz Member, Breternitz locality, Thuringia, Germany. All figures are scanning electron micrographs of silicified specimens. Scale bars 0.5 mm. (a–h) Cranidia, dorsal views. (a) Smallest meraspis, MB.T
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Otarionella rastrum sp. nov. (a–m, t–v) Scanning electron micrographs of silicified specimens from the middle member of the Bissounel Formation (early to late Emsian), Bissounel Peak, Montagne Noire, France. (n–s, w–y) Digital photographs of calcareous specimens from the Mont Peyroux Formation (late Emsian), Montagne Noire, France. Scale bars 0.25 mm (a–e) and 0.5 mm (f–y). (a–e) Metaprotaspides; (a) dorsal view, UMC-IP490; (b) dorsal view, UMC-IP491; (c–e) specimen with anterior border broken, UMC-IP492; (c) dorsal view; (d) left lateral view; (e) postero-lateral view. (f–r) Cranidia, dorsal views; (f) smallest meraspid specimen, UMC-IP493; (g) meraspis, UMC-IP494; (h) meraspis, UMC-IP495; (i) meraspis, UMC-IP496; (j) meraspis, UMC-IP497; (k) meraspis (?), UMC-IP498; (l) meraspis (?), UMC-IP499; (m) meraspis (?), UMC-IP500; (n) holaspis (?), UMC-IP501; (o) holaspis, UMC-IP502; (p) holaspis, UMC-IP503; (q) holotype, holaspis, UMC-IP504; (r) holaspis, UMC-IP505; (s) holaspis, anterior view, UMC-IP506. (t, u) Fragments of the anterior region, anterior views; (t) small specimen, UMC-IP507; (u) large specimen, UMC-IP508. (v–x) Right lateral views; (v) meraspis, UMC-IP496; (w) holaspis (?), UMC-501; (x) holaspis, UMC-IP502; (y) mirrored left lateral view, holaspis, UMC-IP505.
Published: 01 January 2008
, dorsal views; (f) smallest meraspid specimen, UMC-IP493; (g) meraspis, UMC-IP494; (h) meraspis, UMC-IP495; (i) meraspis, UMC-IP496; (j) meraspis, UMC-IP497; (k) meraspis (?), UMC-IP498; (l) meraspis (?), UMC-IP499; (m) meraspis (?), UMC-IP500; (n) holaspis (?), UMC-IP501; (o) holaspis, UMC-IP502; (p
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Figure 10. Silicified specimens representing the ontogenetic development of Zacanthopsis palmeri n. sp., protaspis and early meraspis stages. 1, early protaspid showing posterior fixigenal spines, dorsal view, FMNH PE58186, ×35; 2, early protaspid showing posterior fixigenal spines, dorsal view, FMNH PE58212, ×35; 3–4, early protaspid with hypostome, ventral and lateral views, FMNH PE58157, ×35; 5, late protaspid, dorsal view, FMNH PE58185, ×35; 6–8, late protaspid with hypostome, dorsal, ventral, and lateral views, FMNH PE58156, ×35; 9, hypostome assigned to protaspid stage, ventral view, FMNH PE58163, ×35. 10, Late protaspid showing four glabellar furrows, dorsal view, FMNH PE58155, ×35; 11–12, cranidium with hypostome in meraspis degree 1, ventral and lateral views, FMNH PE58183, ×35; 13–16, pygidium with thoracic segment in meraspis degree 1, lateral, dorsal, anterior, and posterior views, FMNH PE58184, ×35; 17–20, pygidium likely in meraspis degree 1, dorsal, anterior, posterior, and lateral views, FMNH PE58173, ×35; 21, cranidium likely in meraspis degree 0 or 1, dorsal view, FMNH PE58153, ×35; 22, cranidium likely in meraspis degree 0 or 1, dorsal view, FMNH PE58154, ×35; 23, cranidium likely in meraspis degree 0 or 1, dorsal view, FMNH PE58230, ×25. 1, 5, 11–16 from Klondike Gap, 2 from Antelope Canyon, 3–4, 6–10, 17–22 from Ruin Wash, and 23 from Oak Springs Summit.
Published: 01 July 2009
Figure 10. Silicified specimens representing the ontogenetic development of Zacanthopsis palmeri n. sp., protaspis and early meraspis stages. 1 , early protaspid showing posterior fixigenal spines, dorsal view, FMNH PE58186, ×35; 2 , early protaspid showing posterior fixigenal spines, dorsal
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Figure5—Porterfieldia acava n. sp. Las Aguaditas Formation, Quebrada de Las Aguaditas. 1–3, 7–9, talus 1.7 m below LA-B; 4–6, 10, 12, 14, talus 1.5 m below LA-A; 11, 13, 15–17, horizon LA-A. 1, Dorsal view of degree 3 meraspis CEGH-UNC 21415, ×46.4; 2, dorsal view of meraspis CEGH-UNC 21416, ×47.2; 3, dorsal view of degree 7 meraspis CEGH-UNC 21417, ×32.9; 4–6, dorsal, dorsolateral, and lateral views of degree 10 meraspis CEGH-UNC 21418, ×11.8; 7, dorsal view of meraspis (at least degree 8) CEGH-UNC 21419, ×18.4; 8, transitory pygidium and four thoracic segments CEGH-UNC 21420, ×36.7; 9, transitory pygidium and three thoracic segments CEGH-UNC 21421, ×51.8; 10, pygidium and four thoracic segments CEGH-UNC 21422, ×44.3; 11, dorsal view of meraspis CEGH-UNC 21423, ×27.8; 12, posterodorsal view of pygidium CEGH-UNC 21424, ×61; 13, dorsal view of cranidium CEGH-UNC 21425, ×22.8; 14, dorsal view of cranidium CEGH-UNC 21426, ×26.3; 15–17, anterior (×25.4), lateral (×27.8), and dorsal (×23.7) views of holotype cranidium CEGH-UNC 21427
Published: 01 January 2005
Figure 5 — Porterfieldia acava n. sp. Las Aguaditas Formation, Quebrada de Las Aguaditas. 1 – 3, 7 – 9, talus 1.7 m below LA-B; 4 – 6, 10, 12, 14, talus 1.5 m below LA-A; 11, 13, 15 – 17, horizon LA-A. 1, Dorsal view of degree 3 meraspis CEGH-UNC 21415, ×46.4; 2, dorsal view of meraspis
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Drevermannia sp. 1, upper Famennian (to V), lower part of the Breternitz Member, Breternitz locality, Thuringia, Germany. All figures are scanning electron micrographs of silicified specimens. Scale bars 0.5 mm. (a) Metaprotaspis, dorsal view, MB.T.4868.1. (b, c, e–g) Cranidia, dorsal views. (b) Small meraspis, MB.T.4868.2. (c) Meraspis, MB.T.4868.3. (e) Meraspis, MB.T.4868.4. (f) Holaspis (?), MB.T.4868.5. (g) Holaspis (?), MB.T.4868.6. (d, h) Librigenae, dorsal views. (d) Small specimen, MB.T.4868.7. (h) Large specimen, MB.T.4868.8.
Published: 01 January 2006
, dorsal views. (b) Small meraspis, MB.T.4868.2. (c) Meraspis, MB.T.4868.3. (e) Meraspis, MB.T.4868.4. (f) Holaspis (?), MB.T.4868.5. (g) Holaspis (?), MB.T.4868.6. (d, h) Librigenae, dorsal views. (d) Small specimen, MB.T.4868.7. (h) Large specimen, MB.T.4868.8.
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Otarionella rastrum sp. nov. (a–g, j–y, aa, bb) Scanning electron micrographs of silicified specimens from the middle member of the Bissounel Formation (early to late Emsian), Bissounel Peak, Montagne Noire, France. (h, i, z, cc) Digital photographs of calcareous specimens from the Mont Peyroux Formation (late Emsian), Montagne Noire, France. Scale bars 0.5 mm (a–s) and 0.25 mm (t–cc). (a–g) Librigenae, dorsal views; (a) smallest meraspid specimen, UMC-IP509; (b) meraspis, UMC-IP510; (c) meraspis (mirrored), UMC-IP511; (d) meraspis, UMC-IP512; (e) meraspis (?), UMC-IP513; (f) meraspis (?) (mirrored), UMC-IP514; (g) holaspis (?) (mirrored), UMC-IP515. (h, i) Librigenae, dorso-lateral views; (h) holaspis with genal spine broken, UMC-IP516; (i) holaspis with lateral border broken (mirrored), UMC-IP517. (j) Right librigena, ventral view (mirrored), UMC-IP518. (k) Left librigena (note the three rows of lateral border spines), lateral view, UMC-IP519. (l–n) Hypostomes, ventral views; (l) UMC-IP520; (m) UMC-IP521; (n) UMC-IP522. (o–s) Thoracic segments with (o, q, s) or without (p, r) an axial spine; (o) right lateral view, UMC-IP523; (p) posterior view, UMC-IP524; (q) anterior view, UMC-IP525; (r) dorsal view (front to the top), UMC-IP526; (s) dorsal view (front to the top), UMC-IP527. (t–z) Transitory pygidia and pygidia, dorsal views; (t) meraspid degree 2, UMC-IP528; (u) meraspid degree 3, UMC-IP529; (v) large meraspid degree 3, UMC-IP530; (w) meraspid degree 4, UMC-IP531; (x) meraspis, UMC-IP532; (y) small holaspis (?), UMC-IP533; (z) large holaspis, UMC-IP534. (aa) Small meraspis, ventral view, UMC-IP535; (bb) meraspid degree 2, lateral view (mirrored), UMC-IP528; (cc) large holaspis, lateral view, UMC-IP534.
Published: 01 January 2008
the Mont Peyroux Formation (late Emsian), Montagne Noire, France. Scale bars 0.5 mm (a–s) and 0.25 mm (t–cc). (a–g) Librigenae, dorsal views; (a) smallest meraspid specimen, UMC-IP509; (b) meraspis, UMC-IP510; (c) meraspis (mirrored), UMC-IP511; (d) meraspis, UMC-IP512; (e) meraspis (?), UMC-IP513; (f
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Fig. 6.
Published: 03 July 2013
Fig. 6. Tangshanaspis sp. 2. All from Signal Mountain Formation, Joins Ranch section, Arbuckle Mountains, collection JoR 1065 ( Stitt 1971 b ). All pygidia and all ×20. ( a )–( c ) OU 12897, dorsal, lateral, and posterior views. ( d ), ( e ) OU 12898 (meraspis), dorsal and posterior views
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Drevermannia richteriPfeiffer, 1959, upper Famennian (to VI), upper part of the Breternitz Member, Breternitz and Fischersdorf localities, Thuringia, Germany. All figures are scanning electron micrographs of silicified specimens. Scale bars 0.5 mm. (a–f) Librigenae, dorsal views. (a) Smallest specimen, MB.T.4866.22. (b) MB.T.4866.23. (c) MB.T.4866.24. (d) MB.T.4866.25. (e) MB.T.4866.26. (f) Largest specimen, MB.T.4866.27. (g) Left librigena, ventral view, MB.T.4866.28. (h) Left librigena, lateral view, MB.T.4866.29. (i) Large pygidium, ventral view, MB.T.4866.30. (j–n) Transitory pygidia and pygidia, dorsal views. (j) Small meraspis, MB.T.4866.31. (k) Meraspis, MB.T.4866.32. (l) Meraspis (?), MB.T.4866.33. (m) Holaspis, MB.T.4866.34. (n) Largest holaspis, MB.T.4866.35.
Published: 01 January 2006
pygidia and pygidia, dorsal views. (j) Small meraspis, MB.T.4866.31. (k) Meraspis, MB.T.4866.32. (l) Meraspis (?), MB.T.4866.33. (m) Holaspis, MB.T.4866.34. (n) Largest holaspis, MB.T.4866.35.
Journal Article
Journal: Paleobiology
Published: 01 January 2002
Paleobiology (2002) 28 (3): 364–377.
...Figure 4. Small (A) to large (L) specimens of Triarthrus becki . A, Meraspis, NYSM 16781, Cephalic length (CL) = 0.97 mm. B, Meraspis, NYSM 16782, CL = 1.13 mm. C, Meraspis, NYSM 16783, CL = 1.31 mm. D, Meraspis, NYSM 16784, CL = 1.41 mm. E, Meraspis, NYSM 16785, CL = 1.49 mm. F, Meraspis, NYSM...
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Figure10—Triarthrus jachalensis. Las Aguaditas Formation; 1–5, 8–10, Las Aguaditas south, 113.65 m above base of large breccia unit except 3, LAS-B; 6, 7, 11–13, 15, 17, 18, Las Aguaditas north; 14, 16, 19, Mogotes Azules. 1, Dorsal view of degree 2 meraspis CEGH-UNC 21472, ×35.7; 2, dorsal view of degree 2 meraspis CEGH-UNC 21473, ×35.8; 3, dorsal view of degree 3 meraspis CEGH-UNC 21474, ×27; 4, dorsal view of degree 2 meraspis CEGH-UNC 21475, ×35.4; 5, dorsal view of cranidium CEGH-UNC 21476, ×17.8; 6, enrolled degree 2 meraspis CEGH-UNC 21477, LA-3, ×36.9; 7, dorsal view of transitory pygidium, probably degree 2, CEGH-UNC 21478, LA-D, ×58.3; 8, dorsal view of thorax CEGH-UNC 21479, ×20.8; 9, ventral view of meraspid cephalon and partial thorax CEGH-UNC 21480, ×35.8; 10, dorsal view of cranidium CEGH-UNC 21481, ×23.7; 11, dorsal view of cephalon CEGH-UNC 21482, LA-3, ×10; 12, dorsal view of cranidium CEGH-UNC 21483, LA-3, ×10; 13, dorsal view of pygidium CEGH-UNC 21484, LA-E, ×26.7; 14, dorsal view of thoracopygidium CEGH-UNC 21485, ×19.8; 15, dorsal view of librigena, CEGH-UNC 21486, 5 m above LA-2, ×42.6; 16, ventral view of thorax, dorsal view of pygidium CEGH-UNC 21487, 20; 17, dorsal view of cranidium CEGH-UNC 21488, LA-3, ×9.2; 18, dorsal view of pygidium with parts of three thoracic segments CEGH-UNC 21489, LA-3, ×10; 19, dorsal view of thoracopygidium CEGH-UNC 21490, ×19.6
Published: 01 January 2005
Figure 10 — Triarthrus jachalensis . Las Aguaditas Formation; 1 – 5, 8 – 10, Las Aguaditas south, 113.65 m above base of large breccia unit except 3, LAS-B; 6, 7, 11 – 13, 15, 17, 18, Las Aguaditas north; 14, 16, 19, Mogotes Azules. 1, Dorsal view of degree 2 meraspis CEGH-UNC 21472
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Fig. 2.
Published: 03 July 2013
(meraspis), dorsal, posterior, and lateral views. ( g )–( m ) Tangshanaspis depressa ( Stitt, 1971 b ). ( g ), ( h ) OU 12884 (meraspis), dorsal and posterior views. ( i )–( k ) OU 12885, posterior, dorsal, and lateral views. ( l ), ( m ) OU 12886, posterior and dorsal views.
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Fig. 3.
Published: 30 August 2018
, lateral, anterior, and dorsal views, ×35. ( g ) OU 238033, dorsal view, ×35. ( h–j ) Meraspis, OU 238034, dorsal, anterior, and lateral views, ×42. ( k ) OU 238035, dorsal view, ×35. ( l ) Meraspis, OU 238036, dorsal view, ×38. ( m ) OU 238037, dorsal view, ×38. ( n ) OU 238038, dorsal view, ×35.
Journal Article
Published: 01 November 2022
Journal of Paleontology (2022) 96 (6): 1431–1446.
... holaspid material, a degree 2 meraspis, and protaspides. A new locality in the Longha Formation (Cambrian: Guzhangian) of southeastern Yunnan, China, yields a rich collection of articulated holaspid exoskeletons and disarticulated sclerites of a new species, Liostracina fuluensis n. sp. These specimens...
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1–22, Bancroftolithus pozoensis (Baldis and Pöthe, 1995) from upper part of Las Aguaditas Formation at section Las Aguaditas north, specimen in 9 from LAF and specimens in 11 and 13 from LAJ, the rest from LAE; all specimens from CEGH-UNC: 1, ventral view of articulated M0, 24553, ×65; 2, dorsal view of articulated M1, 24554, ×48; 3, ventral view of articulated M1, 24555, ×37; 4, dorsal view of articulated M1, 24556, ×46; 5, ventral view of articulated M1, 24557, ×38; 6, dorsal view of articulated M3, 24558, ×18; 7, dorsal view of small meraspid cranidium, 24559, ×38; 8, dorsal view of small meraspid cranidium, 24560, ×35; 9, dorsal view of small meraspid cranidium, 24561, ×33; 10, dorsal view of meraspid cephalon, 24562, ×28; 11, dorsal view of small cephalon, 24563, ×17; 12, dorsal view of small cephalon, 24564, ×14; 13, dorsal view of cranidium, 24565, ×14; 14, dorsal view of cranidium, 24566, ×15; 15, dorsal view of cranidium, 24567, ×15; 16, dorsal view of cranidium, 24568, ×15; 17, ventral view of articulated M4, 24569, ×13; 18, dorsal view of hypostome, 24570, ×41; 19, dorsal view of fused meraspid free cheeks, 24571, ×33; 20, 20, dorsal view of articulated meraspis M3, 24572, ×17; 21, dorsal view of articulated meraspis M3, 24573, ×14; 22, dorsal view of articulated meraspis M4, 24574, ×14.
Published: 01 November 2011
; 20, 20 , dorsal view of articulated meraspis M3, 24572, ×17; 21 , dorsal view of articulated meraspis M3, 24573, ×14; 22 , dorsal view of articulated meraspis M4, 24574, ×14.
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Pygidium segmentation schedule for Lonchopygella megaspina Zhou, 1977. Abbreviations: H=holaspis, M=meraspis, M-Hn=number of the meraspid instar prior to onset of the holaspid stage (see text for details).
Published: 01 May 2013
Figure 4 Pygidium segmentation schedule for Lonchopygella megaspina Zhou, 1977. Abbreviations: H=holaspis, M=meraspis, M-Hn=number of the meraspid instar prior to onset of the holaspid stage (see text for details).
Journal Article
Published: 07 August 2017
Journal of Paleontology (2017) 91 (5): 933–959.
...; b=border, d=doublure; f=facet: ( 1 ) NIGP 164838, exoskeleton, meraspis degree 4, LYX-1; ( 2 ) NIGP 164839, exoskeleton, meraspis degree 4, LYX-1; ( 3 ) NIGP 163346, exoskeleton, meraspis degree 5, XHZA407-3, original of Lei (2015, fig. 3.3); ( 4 ) NIGP 164952, distorted exoskeleton, meraspis degree...
Journal Article
Published: 01 January 2006
Geological Magazine (2006) 143 (1): 89–104.
...Figure 7. Drevermannia antecurvata sp. nov., upper Famennian (to V), lower part of the Breternitz Member, Breternitz locality, Thuringia, Germany. All figures are scanning electron micrographs of silicified specimens. Scale bars 0.5 mm. (a–h) Cranidia, dorsal views. (a) Smallest meraspis, MB.T...
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Fig. 10.
Published: 30 August 2018
21188, dorsal view, ×20. ( e–g ) NBMG 21189, dorsal, posterior, and lateral views, ×20. ( h ) Meraspis, NBMG 21190, dorsal view, ×40. ( i ) NBMG 21191, dorsal view, ×30.
Journal Article
Published: 01 January 2008
Geological Magazine (2008) 145 (1): 55–71.
..., dorsal views; (f) smallest meraspid specimen, UMC-IP493; (g) meraspis, UMC-IP494; (h) meraspis, UMC-IP495; (i) meraspis, UMC-IP496; (j) meraspis, UMC-IP497; (k) meraspis (?), UMC-IP498; (l) meraspis (?), UMC-IP499; (m) meraspis (?), UMC-IP500; (n) holaspis (?), UMC-IP501; (o) holaspis, UMC-IP502; (p...
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First thumbnail for: The ontogeny and systematics of the otarionine tri...
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