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Shergoldia laevigata

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Journal Article

VENTRAL STRUCTURE AND ONTOGENY OF THE LATE FURONGIAN (CAMBRIAN) TRILOBITE GUANGXIASPIS GUANGXIENSIS ZHOU, 1977 AND THE DIPHYLETIC ORIGIN OF THE MEDIAN SUTURE

XUE-JIAN ZHU, NIGEL C. HUGHES, SHAN-CHI PENG
Published: 01 May 2010
Journal of Paleontology (2010) 84 (3): 493–504.
DOI: https://doi.org/10.1666/09-070.1
...-cranidial median suture that splits ventrally into a pair of posteriorly divergent connective sutures. The rostral plate of G. guangxiensis is thus triangular in outline, as in the co-occurrent Shergoldia laevigata , which also bore a conterminant hypostome. These two taxa appear to be closely related...
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View PDF for article title, VENTRAL STRUCTURE AND ONTOGENY OF THE LATE FURONGIAN (CAMBRIAN) TRILOBITE GUANGXIASPIS GUANGXIENSIS ZHOU, 1977 AND THE DIPHYLETIC ORIGIN OF THE MEDIAN SUTURE
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Figure2—Diagrams of ventral view of cephala of Shergoldia laevigata and Guangxiaspis guangxiensis. 1–2, early and late holaspid of Shergoldia laevigata respectively. Note variation of rostral plate shape. 3, Guangxiaspis guangxiensis

Figure 2 —Diagrams of ventral view of cephala of Shergoldia laevigata an...

Published: 01 May 2010
Figure 2 —Diagrams of ventral view of cephala of Shergoldia laevigata and Guangxiaspis guangxiensis . 1–2 , early and late holaspid of Shergoldia laevigata respectively. Note variation of rostral plate shape. 3 , Guangxiaspis guangxiensis
Image
A scenario for the evolution of holaspid trunk segmentation in tsinaniids expressed in segmentation diagrams (Hughes et al., 2006). Arrows mark the direction of inferred evolutionary change. Cephalon is shown to right as a set of conjoined segments, thorax is shown in shaded circles (degree of shading implies degree of confidence in the number of holaspid thoracic segments for that species), pygidial segments unshaded. Unit shapes represent segment morphotypes, macrospinous segments and terminal piece also shown. (A) ancestral condition as inferred from the pygidial morphology of Mansuyia orientalis, outgroup in the phylogenetic analysis, ten segments inferred from the condition of mansuyine trilobite G. guangxiensis (Zhu et al., 2010); (B) condition inferred for early holaspid L. megaspina, eight thoracic segments inferred from L. mansuyi; (C) condition in early holaspid Shergoldia laevigata (Zhu et al., 2007), eight thoracic segments know definitively.

A scenario for the evolution of holaspid trunk segmentation in tsinaniids e...

Published: 01 May 2013
holaspid Shergoldia laevigata ( Zhu et al., 2007 ), eight thoracic segments know definitively.
Journal Article

Onset of Maturity and Ontogenetic Tagmatization of the Pygidium in the Development of Lonchopygella megaspina (Trilobita, Later Furongian, Cambrian)

Xuejian Zhu, Nigel C. Hughes, Shanchi Peng
Published: 01 May 2013
Journal of Paleontology (2013) 87 (3): 472–483.
DOI: https://doi.org/10.1666/12-073.1
... holaspid Shergoldia laevigata ( Zhu et al., 2007 ), eight thoracic segments know definitively. ...
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View PDF for article title, Onset of Maturity and Ontogenetic Tagmatization of the Pygidium in the Development of Lonchopygella megaspina (Trilobita, Later Furongian, Cambrian)
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Journal Article

Satunarcus , a new late Cambrian trilobite genus from southernmost Thailand and a reevaluation of the subfamily Mansuyiinae Hupé, 1955

Shelly J. Wernette, Nigel C. Hughes, Paul M. Myrow, Apsorn Sardsud
Published: 01 September 2020
Journal of Paleontology (2020) 94 (5): 867–880.
DOI: https://doi.org/10.1017/jpa.2020.23
... , fig. 5.b, 5.g, 5.l, 5.p). Mansuyites futiliformis Shergold, 1972 .—Two cranidia and two pygidia (Shergold, 1972 , pl. 13, figs. 1, 6, pl. 14, figs. 1, 4) Pagodia thaiensis Kobayashi, 1957 .—Two cranidia and one pygidium (Kobayashi, 1957 , pl. 4, figs. 5–7). Shergoldia laevigata Zhu...
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View PDF for article title, Satunarcus , a new late Cambrian trilobite genus from southernmost Thailand and a reevaluation of the subfamily Mansuyiinae Hupé, 1955
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Cambrian and earliest Ordovician fauna and geology of the Sông Đà and adjacent terranes in Việt Nam (Vietnam)

Nigel C. Hughes, Shanchi Peng, David A. T. Harper, Paul M. Myrow, Ngân Kim Phạm, Shelly J. Wernette, Xuejian Zhu
Published: 27 September 2021
Geological Magazine (2022) 159 (1): 55–80.
DOI: https://doi.org/10.1017/S0016756821000844
... stratigraphically above DBT-1 collection. Đền Bà Triệu 1 (DBT-1) (see Fig.  5 ), 19° 55.567′ N, 105° 48.861′ E; Prosaukia sp. indet., Shergoldia sp. cf. S. trigonalis and Palaeostrophia sp. cf. P. jingensis . Phạm Kim Ngân’s locality TH16-/1 (for sketch of entire section see Phạm, 2008 , p. 55). Other...
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Journal Article

Cambrian rocks and faunas of the Wachi La, Black Mountains, Bhutan

NIGEL C. HUGHES, PAUL M. MYROW, N. RYAN MCKENZIE, D. A. T. HARPER, O. N. BHARGAVA, S. K. TANGRI, K. S. GHALLEY, C. M. FANNING
Published: 14 September 2010
Geological Magazine (2011) 148 (3): 351–379.
DOI: https://doi.org/10.1017/S0016756810000750
... funingensis , in a stratigraphic column but provided no description or illustrations of this species, which is thus nomen nudum. Kaolishania laevigata was erected based on a single quite poorly preserved pygidium that is kaolishaniid (Qian, 1994 ). It has only four axial...
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