Paracone bears a quite low parastyle
. An anterior cavity is crescent shaped and shallow, found between protocone and paracone.
PT was defined as 'parastyle
' when it is located on upper molars and as 'protostylid' when it is located on lower molars (Dahlberg, 1945; Dahlberg, 1950).
P4 with distinct protocone, and an incipient to well-developed parastyle
. Mandible much elongated with diastemata between the premolars.
The preprotocrista runs from the protocone to the parastyle
, forming a wide shelf anterior to the paracone and preparacrista.
Occlusal surface of molars complex with labial and lingual styles; well-developed parastyle
and mesostyle, and protostyle and enterostyle (Fig.
Diagnosis.--Differs from all other Heptacodon (where known) in its smaller size and in having a moderately-developed mesiobuccal cingulum on the upper molar parastyle
and relatively greater buccal projection of parastyle
, mesostyle and metastyles are present labially.
The paracone rib lies close to the parastyle
. A strong entostyle is present in the upper molars (Fig.
is connected to the anteroloph, and separated from the protoloph by a wide and deep valley.
The preprotocrista is continuous with a precingulum extending to the parastyle
. The lingual cingulum is interrupted on the talon and at the base of the protocone.
is heavy, the mesostyle is high and the metastyle is incipient.