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1-20 OF 68 RESULTS FOR
meraspis
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Image
Figure 4. Small (A) to large (L) specimens of Triarthrus becki . A, Meras... Available to Purchase
in Morphometric analysis of ontogeny and allometry of the Middle Ordovician trilobite Triarthrus becki
> Paleobiology
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
Image
Drevermannia antecurvata sp. nov., upper Famennian (to V), lower part of t... Available to Purchase
in Ontogeny of Drevermannia and the origin of blindness in Late Devonian proetoid trilobites
> Geological Magazine
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
Image
Otarionella rastrum sp. nov. (a–m, t–v) Scanning electron micrographs of s... Available to Purchase
in The ontogeny and systematics of the otarionine trilobite Otarionella from the Devonian of the Montagne Noire, France and the Maider, Morocco
> Geological Magazine
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
Image
Figure 10. Silicified specimens representing the ontogenetic development of... Available to Purchase
in ONTOGENY AND GEOGRAPHIC VARIATION OF A NEW SPECIES OF THE CORYNEXOCHINE TRILOBITE ZACANTHOPSIS (DYERAN, CAMBRIAN)
> Journal of Paleontology
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
Image
Figure 5 — Porterfieldia acava n. sp. Las Aguaditas Formation, Quebrada d... Available to Purchase
in TRIARTHRINID TRILOBITES (OLENIDAE) FROM THE MIDDLE AND UPPER ORDOVICIAN, PRECORDILLERA OF ARGENTINA
> Journal of Paleontology
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
Image
Drevermannia sp. 1, upper Famennian (to V), lower part of the Breternitz M... Available to Purchase
in Ontogeny of Drevermannia and the origin of blindness in Late Devonian proetoid trilobites
> Geological Magazine
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.
Image
Otarionella rastrum sp. nov. (a–g, j–y, aa, bb) Scanning electron microgra... Available to Purchase
in The ontogeny and systematics of the otarionine trilobite Otarionella from the Devonian of the Montagne Noire, France and the Maider, Morocco
> Geological Magazine
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
Image
Tangshanaspis sp. 2. All from Signal Mountain Formation, Joins Ranch secti... Available to Purchase
in The Late Cambrian (Furongian) trilobite Tangshanaspis Zhou and Zhang, 1978, in North America
> Canadian Journal of Earth Sciences
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
Image
Drevermannia richteri Pfeiffer, 1959 , upper Famennian (to VI), upper part... Available to Purchase
in Ontogeny of Drevermannia and the origin of blindness in Late Devonian proetoid trilobites
> Geological Magazine
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
Morphometric analysis of ontogeny and allometry of the Middle Ordovician trilobite Triarthrus becki Available to Purchase
Journal: Paleobiology
Publisher: Paleontological Society
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...
Image
Figure 10 — Triarthrus jachalensis . Las Aguaditas Formation; 1 – 5, 8 – ... Available to Purchase
in TRIARTHRINID TRILOBITES (OLENIDAE) FROM THE MIDDLE AND UPPER ORDOVICIAN, PRECORDILLERA OF ARGENTINA
> Journal of Paleontology
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
Image
Pygidia of Tangshanaspis from Oklahoma. All from Signal Mountain Formatio... Available to Purchase
in The Late Cambrian (Furongian) trilobite Tangshanaspis Zhou and Zhang, 1978, in North America
> Canadian Journal of Earth Sciences
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.
Image
Eodiscus confossus sp. nov. from the Manuels River Formation, McLeod Point... Available to Purchase
in Pseudocryptic species of the Middle Cambrian trilobite Eodiscus Hartt, in Walcott, 1884, from Avalonian and Laurentian Newfoundland
> Canadian Journal of Earth Sciences
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
New species of Liostracina Monke, 1903 (Trilobita, Cambrian) from Yunnan, China: complete holaspid exoskeleton and implications for higher level classification Available to Purchase
Journal: Journal of Paleontology
Publisher: Paleontological Society
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...
Image
1–22 , Bancroftolithus pozoensis ( Baldis and Pöthe, 1995 ) from upper part... Available to Purchase
in The Upper Ordovician Trinucleid Trilobite Bancroftolithus from the Precordillera of Argentina
> Journal of Paleontology
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.
Image
Pygidium segmentation schedule for Lonchopygella megaspina Zhou, 1977. Ab... Available to Purchase
in Onset of Maturity and Ontogenetic Tagmatization of the Pygidium in the Development of Lonchopygella megaspina (Trilobita, Later Furongian, Cambrian)
> Journal of Paleontology
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
Revision of the oryctocephalid trilobite genera Arthricocephalus Bergeron and Oryctocarella Tomashpolskaya and Karpinski (Cambrian) from South China and Siberia Available to Purchase
Journal: Journal of Paleontology
Publisher: Paleontological Society
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
Ontogeny of Drevermannia and the origin of blindness in Late Devonian proetoid trilobites Available to Purchase
Journal: Geological Magazine
Publisher: Cambridge University Press
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...
Image
Eodiscus tuberculus sp. nov. from the Manuels River Formation, Fosters Poi... Available to Purchase
in Pseudocryptic species of the Middle Cambrian trilobite Eodiscus Hartt, in Walcott, 1884, from Avalonian and Laurentian Newfoundland
> Canadian Journal of Earth Sciences
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
The ontogeny and systematics of the otarionine trilobite Otarionella from the Devonian of the Montagne Noire, France and the Maider, Morocco Available to Purchase
Journal: Geological Magazine
Publisher: Cambridge University Press
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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