A four cuspid third molar is moderately worn including its hypoconulid
. Transverse valleys are linear and shallow, while longitudinal valleys are wavy.
Multiple lingual cusps trait on mandibular premolars and hypoconulid
reduction trait on mandibular first molar in living Jordanian population.
A well-developed hypoconulid
is present posteriorly.
The posterolophid bears a small hypoconulid
, and connects the entoconid to the hypoconid.
had a fossette as well, and appeared as a deep pit.
The ml (MBLUZ-P-3.990, MBLUZ-P-5.896, MBLUZ-P-4.690; Table I; Figure 2f) has an anteriorly projected paraconid without enamel band; a metaconid enamel band is present; meta-entoconid fold shallow and reflected 45[degrees] anteromesialy; ento-hypoconid fold deeper and less inclined (85[degrees]) anteromesialy than meta-entoconid fold; hypoconid buccolingually broad, looks like a trigonid size; anterior facet of the trigonid convex; the lingual enamel band extends to the metaconid to the anterolingual side of the hypoconid, without covering it totally; buccal enamel fold deeper; buccal enamel band covering the anteromesial protoconid facet through posteromesial hypoconulid
facet; hypoconid lingually projected; buccal enamel broader than lingual enamel.
Additionally, Ankylodon progressus has a reduced anterior cingulid relative to Ankylodon annectens and a well developed hypoconulid
(2) both of which are seen in PTRM 1600.
In most anthracotheriids the metastyle is at least moderately developed on M3/ in order to occlude with the posteriorlyextended M/3 hypoconulid
(e.g., as in AMNH 1039, Fig.
It is a rather plastic feature that arises via multiple modes correlated with the development of the hypoconulid
and the hypocone.
A particular cusp, called the hypoconulid
, sits in a back central part of the tooth.
The apices of metaconid and entoconid are broken and hypoconulid
is missing (Fig.