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Jimemys glaebosus
Discussion
species epithet fromthe Latin glaebosus,meaning lumpy, referring to the large, irregular carapacial tubercles of this species.
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Taxonomy
Jimemys glaebosus was named by Edgar et al. (2022). Its type specimen is ROM 56647, a partial shell (a partial nuchal and posterior carapace consisting of left and right costals VI–VIII, left costal V, right partial hyo-hypoplastron, right complete xiphiplastro), and it is a 3D body fossil. Its type locality is east side of McDonald Coulee, which is in a Santonian terrestrial siltstone in the Milk River Formation of Canada. It is the type species of Jimemys.
Synonymy list
| Year | Name and author |
|---|---|
| 2022 | Jimemys glaebosus Edgar et al. p. 207 |
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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.
†Jimemys glaebosus Edgar et al. 2022
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. E. Edgar et al. 2022 | The new taxon Jimemys glaebosus gen. et sp. nov. is diagnosed by the following autapomorphies within Plastomenidae: enlarged, rounded tubercles with smaller intermittent shallow pits across the dorsal surface of the carapace, pygal notch with a straight anterior edge and bordered laterally by costals VII, anteriorly emarginate nuchal, and fused hyo-hypoplastron. Within Plastomenidae, J. glaebosus is similar to Plastomenus thomasii, Helopanoplia distincta Hay, 1908, and Hutchemys spp. and different from Aspideretoides foveatus, Atoposemys superstes, and Gilmoremys spp., in having broad midline contact between the xiphiplastra and hypoplastra. It differs from P. thomasii in that the lateralmargin of the hyo-hypoplastron is straight instead of concave, and a posterior pygal notch bordered by the costals VII is present. It is similar to P. thomasii and different from Helopanoplia distincta, and Hutchemys spp. in that the hyo-hypoplastral bridge is narrow. |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum | |||||
| References: Uetz 2005, Carroll 1988, Hendy et al. 2009 | |||||
Age range: Late/Upper Santonian or 85.80000 to 83.50000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Santonian | Canada (Alberta) | Jimemys glaebosus (type locality: 224584) |