metacone


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metacone

[′med·ə‚kōn]
(vertebrate zoology)
The posterior of three cusps of primitive upper molars.
The posteroexternal cusp of an upper molar in higher vertebrates, especially mammals.
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References in periodicals archive ?
Three clear wear facets affect 1) the metacone, especially at the junction with the base of the metacone and at its apex 2) the central valley of the trigone extending onto the inner wall of the protocone, and 3) the base of the junction between the protocone and paracone.
Hypocone-metacone alternation in M1: 0 = no alternate, 1 = alternate, metacone anteriorly to hypocone.
3 (most-derived dichobunoids [dichobunine Dichobune, hyperdichobunine dichobunids; might include other dichobunids with quadrate hypoconiferous Ms] plus caenotheriids); Ms relatively selenodont, quadrate; tritubercular distal lobe with distinct metacone, metaconule, and hypocone; TV continuous; paraconule reduced/lost (OW).
In general, the P4 of amphicyonids is laterally compressed and the protocone is nearly in line with the paracone and metacone as exhibited by SDSM 82105.
The transverse ridge posterior to the metacone is well developed as in Recent S.
The paracone and metacone are subequal in size with metacone positioned slightly toward the midline (linguad).
1-2] ([ILLUSTRATION FOR FIGURE 1A OMITTED], points 5-8); for Stenodermatini and Glossophagini, points were taken on the presumed paracone and metacone of [M.
The paracone is contiguous with metacone through a narrow channel at the posterior side.
To determine cusp relief, we measured the depth of the valley between the paracone and metacone cusps as well as the anteroposterior length of each tooth using the computer software ImageJ 1.
The paracone is almost equal to the metacone in antero-posterior length.