Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Protolambda hatcheri
Taxonomy
Protolambda hatcheri was named by Osborn (1898). Its type specimen is AMNH 2202, a maxilla (right maxilla with M3), and it is a 3D body fossil. It is the type species of Protolambda.
It was recombined as Pediomys hatcheri by Simpson (1927), Simpson (1929), Clemens (1966), Lillegraven (1969), Clemens (1979), Archibald (1982), Storer (1991), Lofgren (1995), Hunter (1997) and Kielan-Jaworowska et al. (2004); it was recombined as Aletridelphys hatcheri by Davis (2007).
It was recombined as Pediomys hatcheri by Simpson (1927), Simpson (1929), Clemens (1966), Lillegraven (1969), Clemens (1979), Archibald (1982), Storer (1991), Lofgren (1995), Hunter (1997) and Kielan-Jaworowska et al. (2004); it was recombined as Aletridelphys hatcheri by Davis (2007).
Synonyms
|
Synonymy list
Year | Name and author |
---|---|
1898 | Protolambda hatcheri Osborn |
1898 | Synconodon sexicuspis Osborn |
1902 | Protolambda hatcheri Hay p. 692 |
1902 | Synconodon sexcuspis Hay p. 692 |
1927 | Pediomys hatcheri Simpson p. 122 |
1927 | Synconodon sexicuspis Simpson p. 123 |
1929 | Pediomys hatcheri Simpson pp. 117-118 |
1966 | Pediomys hatcheri Clemens |
1969 | Pediomys hatcheri Lillegraven |
1979 | Pediomys hatcheri Clemens p. 193 |
1982 | Pediomys hatcheri Archibald |
1991 | Pediomys hatcheri Storer |
1995 | Pediomys hatcheri Lofgren |
1997 | Pediomys hatcheri Hunter |
2004 | Pediomys hatcheri Kielan-Jaworowska et al. pp. 443, 457 |
2007 | Aletridelphys hatcheri Davis p. 233 |
2010 | Protolambda hatcheri Wilson et al. p. 513 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Protolambda hatcheri Osborn 1898
show all | hide all
Invalid names: Synconodon sexicuspis Osborn 1898 [synonym]
Diagnosis
Reference | Diagnosis | |
---|---|---|
G. P. Wilson et al. 2010 | —DMNH 52228 is a worn fragment
of a left M2 that preserves the lingual root, the posmetacrista, and the remainder of the crown lingual to the apices of the paracone and metacone (Fig. 10B). Among Lancian pediomyids, it is most consistent with the size and morphology of Protolambda hatcheri. The metacone was taller than the slightly more buccal paracone. The protocone is tall with a broad distally expanded base. The conules are largely worn away. Measurements: L ≥ 2.65 mm, MW ≥ 3.62 mm, DW ≥ 3.24 mm. UCM 40589 is a left dentary fragment with a well-preserved p3 and a distal alveolus for p2 (Fig. 10C–E). We refer it to P. hatcheri on the basis of size, robustness, and general agreement with specimens in Clemens (1966). The p3 is double-rooted tooth with a robust crown. The mesial half is dominated by a cusp with a somewhat blunted apex. A weak cingulid extends one-third the length of the crown from the mesial aspect along the lingual base (Fig. 10E). A distinct cristid that exhibits minor wear descends steeply from the apex to the talonid (Fig. 10C). It forms a notch at the base of the talonid and then ascends to the dominant talonid cusp (hypoconid). A second, minor talonid cusp is mesiolingual to the hypoconid. A small crisitd extends mesially from this cusp forming a small basin (Fig. 10C, E). A postcingulid descends from the distal aspect of the hypoconid and extends mesially along the buccal base of the talonid. Measurements of p3: L = 3.80 mm, W = 1.57 mm. P. hatcheri was previously known from as far south as the North Horn Formation of central Utah. |