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 ?
Also, the Chapala specimens share with Postcopemys a paraloph not aligned with the anterior arm of the hypocone in upper molars, but with the entolophid aligned with the anterior arm of the protoconid in lower molars, and the protolophule is absent in M1.
Number of Occurrences Percentage Tooth First molar (P) 58 62.4 Fourth premolar (D) 18 19.4 Second molar (P) 14 15.1 Second premolar (D) 6 6.5 Third molar (P) 5 5.4 Third premolar (D) 5 5.4 Cusp Hypoconid 77 55.4 Protoconid 26 18.7 Metaconid 18 12.9 Entoconid 17 12.2 DISCUSSION
The ml (MBLUZ-P-3.990, MBLUZ-P-5.896, MBLUZ-P-4.690; Table I; Figure 2f) has an anteriorly projected paraconid without enamel band; a metaconid enamel band is present; meta-entoconid fold shallow and reflected 45[degrees] anteromesialy; ento-hypoconid fold deeper and less inclined (85[degrees]) anteromesialy than meta-entoconid fold; hypoconid buccolingually broad, looks like a trigonid size; anterior facet of the trigonid convex; the lingual enamel band extends to the metaconid to the anterolingual side of the hypoconid, without covering it totally; buccal enamel fold deeper; buccal enamel band covering the anteromesial protoconid facet through posteromesial hypoconulid facet; hypoconid lingually projected; buccal enamel broader than lingual enamel.
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.
A well developed furrow separates the hypoconid from the strong protoconid on the buccal side.
"minor") by a more obtuse angle between the protoconid and paraconid on ml; from the Asian species St.
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.
The functional equivalent of the shearing blade and carnassial notch is the paracristid crest connecting the paraconid to the protoconid, on the outer, anterior face of the lower molar tooth in a similar position to the eutherian carnassial blade [ILLUSTRATION FOR FIGURE 2 OMITTED].
The protoconid is slightly lower than the metaconid.
The hypoconid covers more area than the protoconid. The anterior transverse flange is present.