Description and comparison: The paraconid
is present mesially and entoconid distally in the third premolar (Fig.
is well distinguished and compressed laterally.
The p4 has a strongly developed posterior cuspid, m1 with strong and voluminous metaconid, m2 big with reduced to absent paraconid
, narrow talonid almost completely occupied by the hypoconid.
The partial lower jaw also appears to have the alveolus of i1 extending posteriorly beneath the paraconid
of m1, a distinguishing feature of the genus Notiosorex (Carraway and Timm, 2000).
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.
Ankylodon is characterized by having moderate curvature of the trigonid, reduced paraconid
, strongly convex buccal margin of the protoconid and metaconid, and boarder nature of the tooth when compared to Metacodon (1) all of which are seen in PTRM 1600.
The P4 has the paraconid
well separated from the parastylid.
"minor") by a more obtuse angle between the protoconid and paraconid
on ml; from the Asian species St.
The paracristid is strong, descending the face of the paraconid
in a shallow arc, terminating near the middle of the metaconid's base and a few millimeters above the slight anterior cingulum.
The species is characterized by a first lower molar with distinct lingual cusps (paraconulid) between the paraconid
The functional equivalent of the shearing blade and carnassial notch is the paracristid crest connecting the paraconid
to the protoconid, on the outer, anterior face of the lower molar tooth in a similar position to the eutherian carnassial blade [ILLUSTRATION FOR FIGURE 2 OMITTED].
, metaconid and entoconid can be clearly differentiated.