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Impregnochelys pachytectis
Taxonomy
Impregnochelys pachytectis was named by Meylan and Auffenberg (1986). Its type specimen is BMNH R 5708, a partial shell (nearly complete plastron), and it is a 3D body fossil. Its type locality is Rusinga Island, which is in a Burdigalian terrestrial horizon in Kenya.
Synonymy list
| Year | Name and author |
|---|---|
| 1986 | Impregnochelys pachytectis Meylan and Auffenberg p. 292 |
| 2018 | Impregnochelys pachytestis Vlachos and Rabi p. 663 |
| 2021 | Impregnochelys pachytectis Georgalis 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.
†Impregnochelys pachytectis Meylan and Auffenberg 1986
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. L. Georgalis et al. 2021 | Impregnochelys pachytectis can be diagnosed as a member of Testudinidae and Geochelona by the full list of shell and appendicular characters provided for these clades above. Impregnochelys pachytectis can be differentiated from all other testudinids except for Kinixys by the unique combination of the following features: three axillary scutes, anteriorly extended peripherals, a long and narrow anterior plastral lobe, long and thick epiplastra with non-divergent paired gulars, prominent gular protrusion of the shell, humeral equal or shorter than gulars, and femoral head at high angle to shaft. Impregnochelys pachytectis can be further differentiated from Kinixys spp. by being significantly larger (plastron length exceeding 60 cm) and much more robust, the absence of a kinetic carapace, the presence of anterior peripherals with extreme ventral and anterior projection, the absence of a deep nuchal notch, the absence of a dorsal bump on the neural I, the presence of cervical scute (present also in all Kinixys spp. with the exception of Kinixys erosa [Schweigger, 1812]), the presence of either the rib-heads (or struts) for their support on all neurals, the absence of contact of the marginals IV with the pleurals II, and the presence of gibbosities in the vertebral area. |