protoconid

pro·to·co·nid

(prō'tō-ko'nid),
The mesiolingual cusp of a lower molar tooth in a mammal.

pro·to·co·nid

(prō'tō-kon'id)
1. The mesiobuccal cusp of human lower molars.
2. The first lower molar cusp to develop evolutionarily.
See also: protocone
[protocone + -id]

pro·to·co·nid

(prō'tō-kon'id)
Mesiolingual cusp of mammalian lower molar tooth.
[protocone + -id]
References in periodicals archive ?
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.
Enamel is missing on the posterior face of the protoconid and mesiobuccal corner of the protoconid, and the posterior half of the hypoconid is missing.
In the second case, the holes could have been made by the paracone of the upper carnassials or by the protoconid of the lower carnassials of a large carnivore with strong jaws and very pointed carnassials.
An exostylid was present between the protoconid and hypoconid.
geismarianus is characterized by an m I with a low, short trigonid with the metaconid slightly more posterior than the protoconid, a large talonid, subequal entoconid and hypoconid, compressed m2 trigonid with an anterobuccal cingulid, and a very small paraconid SDSM 8640 differs from N geismarianus in that the length of the ml is not as reduced and has a lesser degree of trigonid compression on the m2.
Protoconid is slightly longer anteroposteriorly and higher than the paraconid.
The paraconid is only slightly smaller than the protoconid and not as tall, with heavy dorsal wear.
Predominantly, these facets were found on the mesiobuccal aspect of the protoconids and were manifest as cusp-tip facets, although Phase II facets on the hypoconid were viewed on a few specimens that had poorly preserved protoconids.