In " Nalacetus ", in contrast, the protocone lobe is larger in the first molar than in the second.
12.
The connection between the protocone and the paracone, the major cusps immediately after the anterocone, is located relatively far toward the front.
13.
It has a dominant central protocone flanked by denticles that decrease in size mesially and distally, resulting in a tooth with a triangular profile.
14.
The fossil genus " Nycticeboides " lacks the rounded lingual face of the protocone seen in ? " N . linglom " and possesses additional cuspules.
15.
They proposed that wear in the australosphenidan talonid occurs mainly on the rims, not in the talonid basin itself, and that australosphenidans may not have had a functional protocone.
16.
The parastyle is also less developed than in " Eosimias ", but the protocone, the main cusp on the lingual side of the tooth, is more expansive.
17.
As in M1, the paracone is connected to the front or middle of the protocone, the mesoloph is well-developed, and the valleys meet at the midline of the tooth.
18.
The mesoloph is present on M3, but the posteroloph, a crest at the back of the tooth, is absent or vestigial, as is the hypoflexus ( the valley between the protocone and the cusp behind it, the hypocone ).
19.
Flynn and colleagues identified two wear facets at the front and back margins of the talonid basin; they argue that these wear facets suggest the presence of a protocone ( another cusp on the outer side of the tooth ) on the upper molars.
20.
On M2, there is no protoflexus ( an indentation in front of the protocone, which on this tooth is the frontmost cusp ) and the valley between the paracone and the mesoloph, the mesoflexus, is not divided into two pieces by a paracone mesoloph connection.
