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Sierradiadema kristini

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Journal Article

First record and phylogenetic significance of a Jurassic diadematacean sea urchin from California

Rich Mooi, Richard P. Hilton
Published: 01 May 2014
Journal of Paleontology (2014) 88 (3): 421–433.
DOI: https://doi.org/10.1666/13-130
... Jurassic diademataceans have been described previously from North America. We describe a new genus and species, Sierradiadema kristini , from a single fossil from the Middle Jurassic (Callovian) Colfax sequence of the Mariposa Formation exposed in the Middle Fork American River drainage of the northern...
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Map showing locality for <span class="search-highlight">Sierradiadema</span> <span class="search-highlight">kristini</span> n. gen. n. sp. Fossil ech...

Map showing locality for Sierradiadema kristini n. gen. n. sp. Fossil ech...

Published: 01 May 2014
Figure 1 Map showing locality for Sierradiadema kristini n. gen. n. sp. Fossil echinoid icon and arrow indicate approximate location of slate deposit in which fossil was found.
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Comparison of features used to distinguish <span class="search-highlight">Sierradiadema</span> <span class="search-highlight">kristini</span> n. gen....

Comparison of features used to distinguish Sierradiadema kristini n. gen....

Published: 01 May 2014
Table 1 Comparison of features used to distinguish Sierradiadema kristini n. gen. n. sp. from near-contemporary groups. Names in parentheses indicate crown group represented by that taxon.
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Holotype of <span class="search-highlight">Sierradiadema</span> <span class="search-highlight">kristini</span> n. gen. n. sp., holotype, CASG 72939: ...

Holotype of Sierradiadema kristini n. gen. n. sp., holotype, CASG 72939: ...

Published: 01 May 2014
Figure 2 Holotype of Sierradiadema kristini n. gen. n. sp., holotype, CASG 72939: 1 , automontage image of entire specimen under direct lighting; 2 , image taken with low-angle lighting adjusted to create suggestion of relief instead of impression shown in actual specimen.
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Features of spination of <span class="search-highlight">Sierradiadema</span> <span class="search-highlight">kristini</span> n. gen. n. sp.: 1 , deta...

Features of spination of Sierradiadema kristini n. gen. n. sp.: 1 , deta...

Published: 01 May 2014
Figure 3 Features of spination of Sierradiadema kristini n. gen. n. sp.: 1 , detail from near tip of primary spine showing vestiges of internal meshwork (arrow) and absence of verticillation along spine shaft; 2 , detail of base of primary spine also showing lack of verticillation
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Tooth morphology of <span class="search-highlight">Sierradiadema</span> <span class="search-highlight">kristini</span> n. gen. n. sp.: 1 , overview ...

Tooth morphology of Sierradiadema kristini n. gen. n. sp.: 1 , overview ...

Published: 01 May 2014
Figure 5 Tooth morphology of Sierradiadema kristini n. gen. n. sp.: 1 , overview showing magnified view in 2 ; 2 , detail of part of lantern illustrating hollows once occupied by tooth material; 3 , magnified view of region inside box in 2 , U-shaped cross-section of hollow left by tooth
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Plate architecture, podial pores, and tuberculation of a single ambulacrum ...

Plate architecture, podial pores, and tuberculation of a single ambulacrum ...

Published: 01 May 2014
Figure 4 Plate architecture, podial pores, and tuberculation of a single ambulacrum and single interambulacrum (shaded) of Sierradiadema kristini n. gen. n. sp. Paired podial pores leading to a single podium outlined by dotted line, heavy line at bottom of image indicates edge of peristome.