Like the upper teeth, they bear four cusps ( metaconid, protoconid, entoconid, and hypoconid ), four lophs ( metalophid, mesolophid, hypolophid, and posterolophid ) and three valleys.
22.
The cheek teeth in the lower jaw are also dilambdodont, with broad, high metalophids ( posterior crest ) and tall metaconid ( posterior-interior cusp ) with much lower paracristids and small paraconids.
23.
The anteroconid, the cusp at the front of the tooth, is oriented perpendicularly to the main axis of the tooth and on the lingual ( inner ) side is separated from the metaconid cusp.
24.
Two crests descend from it at right angles in a lingual direction ( towards the inner side of the tooth ) : the protolophid towards the front, ending at the low paraconid, and the metalophid towards the back, reaching the elongate metaconid.
25.
In m2, the trigonid ( the front portion of the tooth ) consists of three very distinct cusps : the paraconid at the front, and behind it the paired protoconid ( on the buccal side ) and metaconid ( on the lingual side ).
26.
In " I . himalayensis " at least ( the structure is damaged in the only known lower molar of " I . kamlialensis " ) there is a well-developed hollow in the trigonid in front of the protoconid and metaconid.
27.
In " Indraloris himalayensis " lower molars, there are four main cusps ( protoconid and metaconid in the trigonid, hypoconid and entoconid in the talonid ), which give the crown a rectangular aspect, although the labial cusps ( protoconid and hypoconid ) are placed somewhat anterior to their lingual counterparts.
28.
The front half of the m1 and m2 consists of the trigonid, a group of three cusps forming a triangle : the paraconid at the front on the inner side, protoconid in the middle on the outer ( labial ) side, and metaconid at the back on the inner side ( see Figure 2 ).
29.
Features that are in common with the " Thylacinus " genus are the centrocrista is straight on the first upper molar, the angle of the crest at the paracone and metacone is wider than plesiomorphic thylacinidae and the loss of metaconid and further widening of the crests increasing the size of the talonid ( back half of the tooth ).
30.
Muirhead ( 1997 p . 372 ) describes " W . ridei " as having the following features that are unique : parametacrista on the first molar is straight, entoconid either missing of combined with the hypoconid in a more posterior position, the loss or reduction of styler crests, small metaconid, talonid basin reduced by the Ngamalacinus ", and that is the metaconid and protoconid are reduced.
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