Palembert is found in the new Quercy phosphorites city (South-west of France) near the community from Caylus (Tarn-et-Garonne, France)

Palembert is found in the new Quercy phosphorites city (South-west of France) near the community from Caylus (Tarn-et-Garonne, France)

Situation of Palembert. That remaining M2/ (Friend 21); that remaining mandibular fragment having M/3 (Buddy 60); you to left mandibular fragment which have Yards/dos and P/4 (Pal 62); one to best separated Meters/step 3 (Friend 64).

To the distal part, the new talonid basin is buccolingually compacted and you may bears a little entoconid and you will an used hypoconid

Description. The upper dentition off Palembertina deplasi nov. gen. nov. sp. is noted by M2/ (Friend 21; Shape 2I-J, Figure 3C). It carries five main cusps. This new paraconule is actually mesiolingual and holds an effective preparacristula connecting the preparacristyla; the fresh new metaconule are highest and you can gift suggestions a primary and you may proceeded premetacristula, and additionally good postmetacristula signing up for the postmetacristyla; the protocone lacks a great crest which can be centrolingually organized. Brand new styles are really-pronounced: the new buccal appearance are weakly crested with a circle-instance and you may distally much more likely mesostyle; the fresh lingual styles, distostyle and you may mediostyle, is actually remote and enormous. Fundamentally, the latest M2/ features noticable mesial and you will distal cingula.

The lower dentition away from Palembertina deplasi aged P/cuatro and you may Yards/2, an entire, unworn M/3, and you will a damaged Yards/step three. Brand new crown from P/cuatro (Buddy 62; Profile 2G-H) was short and you will thin and gifts around three fundamental cuspids: a big protoconid, metaconid, and you will paraconid. Toward mesial part of the tooth, this new paraconid are somewhat inclined lingually. A postprotoconulid is seen amongst the protoconid together with hypoconid. The newest morphology of one’s lower molars is generally based on Yards/3 (Pal 60, Pal 64; Profile 2E-F, 2K, Contour three dimensional), from the bad maintenance of your own Meters/2 (Buddy 62; Figure 2G-H). The lower molars introduce about three lingual cuspids: a great mesial metaconid, a sandwich-central metaconulid, and you may a distal entoconid. With the trigonid, this new paraconid is quick, and protoconid is quite lingual. New talonid is large having a little centroconulid nearby the metaconulid, and you can a great postendocentroconulid weakly expanded distolingually. The fresh metaconulid is actually highest, near the metaconid, therefore the mediocristid try short. A big valley can be obtained between your metaconulid as well as the entoconid. The brand new entoconid provides a circle-particularly profile which can be slightly way more distal than the hypoconid. M/step 3 (Friend sixty, Pal 64; Shape 2E-F, 2K, Contour three dimensional) present a large hypoconulid, basin-designed and you may distal on entoconid. They links to the remaining portion of the talonid by the prehypocristulid, hence touches the latest posthypocristulid and you will postentocristulid. More over, the fresh new posthypocristulid is weakly obvious and you may offered lingually. Fundamentally, the newest mesial cingulid was higher.

The latest protoconid while the metaconid try next to each other, the newest protoconid becoming a great deal more mesial versus metaconid

Brand new mandibular morphology out of Palembertina deplasi the fall of. gen. nov. sp. are reported regarding level of next premolar (Friend 62; Profile 2G-H) mesially, to your foot of the mandibular angle (Pal 60; Figure 2E-F) distally. The latest mandible (Buddy 62) gift ideas a short diastema anywhere between P/dos and you will P/step three and two rational foramina to the horizontal ramus, that below the mesial section of P/dos and one beneath the mesial part of P/4 (Shape 2H). The latest lateral ramus is gracile, apparently superficial, and its particular top is pretty lingering involving the premolar area and you may the past molar. A broad gap is present amongst the root of the rising ramus additionally the distal margin out-of M/3 (Figure 2F). The angular apophysis is not preserved but is apparently medially inclined; it’s mesially delimited from the a superficial incisura vasorum (Pal sixty).

Comments. Gervais (1852) erected the newest types Cainotherium courtoisii, and you may Stehlin (1906) after that placed they on genus Oxacron. Gervais (1852) explained and thought the types in accordance with the small-sized cainotheriids specimens off La Debruge but did not describe a good holotype. According to Global Code off Zoological Nomenclature, title Oxacron courtoisii can be acquired but not valid; for this reason, we define right here an effective lectotype and you may an effective paralectotype to possess Oxacron courtoisii, equal to the material out-of La Debruge in the first place decided by the Gervais (1852): left mandibular fragment having P/step three-M/step 3 (dish XXXV, fig. 4) to your lectotype; kept maxillary fragment having P4/-M3/ (plate XXXIV, fig. 6) on paralectotype.

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