The protocone is connected to the paracone by a protoloph, which lacks a small cusp ( the paraconule ).
2.
The fourth upper premolar ( P4 ) has not been recorded, but there is a specimen of its cusps ( protocone, paracone, hypocone, and metacone ) and lophs or crests ( protoloph, mesoloph, metaloph, and posteroloph ), separated by synclines or valleys.
3.
"Radinskya " is known only from a partial skull and upper dentition, which makes it difficult to assess its relationships to other fossils . described the upper molars as " quadrate with a rhomboid outline and a weak, ?-shaped crown pattern formed by the incipient ectoloph, protoloph, and metaloph ( crests on the crowns ).
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