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Exallaspis maccrackeni
Taxonomy
Exallaspis maccrackeni was named by Chatterton and Ludvigsen (2004). Its type specimen is GSC 122259, a pygidium (thoracopygidium), and it is a 3D body fossil. Its type locality is AN44, which is in an Aeronian/Telychian open shallow subtidal lime mudstone/mudstone in the Jupiter Formation of Canada.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2004 | Exallaspis maccrackeni Chatterton and Ludvigsen p. 31 figs. Pl. 21, fig. 2 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Exallaspis maccrackeni Chatterton and Ludvigsen 2004
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Aberhan et al. 2004, Hendy 2009 | |||||
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Aeronian | Canada (Quebec) | Exallaspis maccrackeni (184996) | |
| Aeronian - Telychian | Canada (Quebec) | Exallaspis maccrackeni (type locality: 186065 186068) | |
| Telychian | Canada (Quebec) | Exallaspis maccrackeni (186089) |