|
Metapterodon markgrafi
|
Fayum |
Maxilla P4 – M2 |
Holroyd ()
2003)
)
(1980)
)
1947)
)
Gutiérrez (2009)
KO 466’04 (Pl. 6, Fig. 3) is a left P4 (L =
4.6 mm
, W =
3.2 mm
). The protocone and the postero-buccal border are lightly worn. It is quite sectorial with a reduced protocone located in front of the main cusp, which is conical.The posterior cusplet is strongly developed and approaches the morphology of the metastyle of the upper molars. There is a clearly visible notch between the protocone and the posterior cusp.
1999)
et al. (1988)
et al. (1988)
1999)
|
2007)
|
)
D i s c u s s i o n. The upper dentition attributed to
E. pilgrimi
differs completely from the rest of the known morphotypes in species of hyaenodonts from the Miocene of Africa, which prompts us to erect a new genus.
Exiguodon pilgrimi
possesses a highly original upper dentition, as shown in the diagnosis above, which is based mainly on the maxilla from
Napak
NAP IV-64 (Pl. 6, Fig. 2), described and figured by
Morales et al. (2007
: figs. 1-3 and 3-1), and which, combined with the much smaller dimensions of the molars, can be summarised as a combination of primitive features such as the presence of a strong buccal cingulum and a broad buccal shelf, with more derived ones such as the extreme reduction of the protocone, the broadening of the metastyle and the compression of the paracone.
|
2007)
|
|
Isohyaenodon zadoki
|
Napak I |
Mandible m3 – m2 |
Morales et al. (
|
Isohyaenodon pilgrimi
|
Rusinga |
Mandible p2 – m3 |
M1 (Songhor) |
Savage (1965
|
Isohyaenodon pilgrimi
|
Napak IV |
Maxilla M2 – M3 |
Morales et al. (
|