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Leptolophus
Taxonomy
Leptolophus was named by Remy (1965). It is not extant. Its type is Leptolophus stehlini.
It was assigned to Plagiolophinae by Badiola et al. (2002); to Palaeotheriinae by Remy (2017); and to Palaeotheriidae by Hooker (1986), Prothero and Schoch (1989) and Perales-Gogenola et al. (2021).
It was assigned to Plagiolophinae by Badiola et al. (2002); to Palaeotheriinae by Remy (2017); and to Palaeotheriidae by Hooker (1986), Prothero and Schoch (1989) and Perales-Gogenola et al. (2021).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1965 | Leptolophus Remy p. 4362 |
| 1986 | Leptolophus Hooker p. 343 |
| 1989 | Leptolophus Prothero and Schoch p. 532 |
| 2002 | Leptolophus Badiola et al. p. 842 |
| 2017 | Leptolophus Remy |
| 2021 | Leptolophus Perales-Gogenola et al. |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Leptolophus Remy 1965
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†Leptolophus cuestai Perales-Gogenola et al. 2021
†Leptolophus franzeni Perales-Gogenola et al. 2021
†Leptolophus magnus Remy 1998
†Leptolophus nouleti Remy 1998
†Leptolophus stehlini Remy 1965
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. Perales-Gogenola et al. 2021 | (after Remy, 1998, 2015)—Dentition characterized by canines that are high and compressed labiolin- gually from the base to the apex, and by a very hypsodont (HIupper molars = 0.81–1.19; HIlower molars = 1.83–>4.11) (Tables 1– 4), lophodont and heterodont jugal series. Jugal series comprised of highly reduced premolar series with three non-molariform premolars, combined with large, hypsodont molars, with enlarge- ment of last molars (mainly M3/m3). Upper premolars with one external cusp and one internal cusp joined by two transverse crests and strong posterior cingulum. p4 with reduced talonid, without entoconid, and much lower than trigonid. Upper molars with: trapezoidal outline, being longer in the occlusal facet than at the base of the crown and wider mesially than dis- tally (in M1 and M2); without large paraconule and metaconule, which are slightly differentiated inside the protoloph and meta- loph, respectively; and with tendency to develop symmetric hyp- sodonty, labial and lingual cusps being similar in height. Ectoloph flattened but with a W-shaped external wall, which is slightly to moderately lingually inclined, and with styles and stylar ribs (especially mesostyle) from subtle to very prominent. No cingula in lower dentition. Weak to thick coronal cementum and dental enamel with horizontal perikymata weakly marked, sometimes inclined toward the cusps. Relatively narrow cranium with a particularly thin snout. Nasal indentation reaches the level of P2 or P3. Very short infraorbital canal, and moderately elongated post-canine diastema, longer than in Palaeotherium and shorter than in Plagiolophus (Paloplotherium). High mandibular ramus narrower in the articular region. |
Measurements
No measurements are available
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| Source: g = genus, subc = subclass, c = class, subp = subphylum | |||||
| References: Legendre 1988, Hendy et al. 2009, Lillegraven 1979, Carroll 1988 | |||||
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bartonian | France (Quercy, Midi-Pyrenees Region) | L. stehlini (12840) | |
| Bartonian | France (Languedoc-Roussillon Region) | L. stehlini, L. magnus (31736 183350) | |
| Bartonian | Spain (Castilla y Leon) | L. sp. (40358) | |
| MP 18 | Spain (Basque County) | L. new species, L. cuestai, L. franzeni, Plagiolophus mazateronensis (38817) |