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Osteopygis russelli
Taxonomy
Judithemys russelli was named by Brinkman (2015). Its type specimen is UALVP 47598, a partial skeleton (articulated shell and pelvis. Carapace missing left peripherals six to nine and right peripherals five to seven. Plastron missing epiplastra and entoplastron. P), and it is a 3D body fossil. Its type locality is Long Fall Horizon, which is in a Lancian fluvial claystone/conglomerate in the Frenchman Formation of Canada.
It was recombined as Osteopygis russelli by Gentry et al. (2023).
It was recombined as Osteopygis russelli by Gentry et al. (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Judithemys russelli Brinkman |
| 2023 | Osteopygis russelli Gentry et al. |
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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.
†Osteopygis russelli Brinkman 2015
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. B. Brinkman 2015 | A species of the genus Judithemys differing from the two recognised species of Judithemys in features of both the carapace and plastron. It is similar to J. backmani and different from J. sukhanovi in having relatively narrower vertebral scutes and a fenestrated plastron. Judithemys russelli differs from J. backmani in features of the plastron, particularly the longer bridge; the greater contribution of the hyoplastron to the bridge; and the longer posterior lobe with a more rounded posterior end. The carapace also differs in being narrower, in that the anterior portion of the second vertebral scute is constricted relative to the posterior portion, and in the presence of a relatively larger twelfth marginal scute. | |
| A. D. Gentry et al. 2023 | Osteopygis russelli can be diagnosed as a representative of Osteopygis by the set of shell characters listed for the genus above. O. russelli can be differentiated from other members of Osteopygis by having a tall, narrow central plastral fenestra, contact between the fourth and fifth vertebrals which crosses the ninth neural, a notably sinuous contact between the left and right xiphiplastron, and by lacking a hypo-xiphiplastral fenestra. |