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Protolambda hatcheri

Mammalia - Pediomyidae

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 was recombined as Pediomys hatcheri by Simpson (1927), Simpson (1929), Hay (1930), 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
YearName and author
1898Protolambda hatcheri Osborn
1898Synconodon sexicuspis Osborn
1902Protolambda hatcheri Hay p. 692
1902Synconodon sexcuspis Hay p. 692
1927Pediomys hatcheri Simpson p. 122
1927Synconodon sexicuspis Simpson p. 123
1929Pediomys hatcheri Simpson pp. 117-118
1930Pediomys hatcheri Hay p. 390
1930Synconodon sexcuspis Hay p. 396
1966Pediomys hatcheri Clemens
1969Pediomys hatcheri Lillegraven
1979Pediomys hatcheri Clemens p. 193
1982Pediomys hatcheri Archibald
1991Pediomys hatcheri Storer
1995Pediomys hatcheri Lofgren
1997Pediomys hatcheri Hunter
2004Pediomys hatcheri Kielan-Jaworowska et al. pp. 443, 457
2007Aletridelphys hatcheri Davis p. 233
2010Protolambda hatcheri Wilson et al. p. 513

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
RankNameAuthor
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
subclassMetatheria()
—Marsupialiformes
superfamilyPediomyoideaSimpson 1927
familyPediomyidae()
genusProtolambdaOsborn 1898
specieshatcheriOsborn 1898

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
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Invalid names: Synconodon sexicuspis Osborn 1898 [synonym]
Diagnosis
ReferenceDiagnosis
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.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialc
Locomotion: actively mobilec
Life habit: scansorialsubc
Diet: omnivoresubc
Reproduction: viviparoussubc
Created: 2011-04-28 11:05:11
Modified: 2011-04-27 20:05:35
Source: subc = subclass, c = class, subp = subphylum
References: Carroll 1988, Hendy et al. 2009, Clemens 1979, Lillegraven 1979, Hopson 1973

Age range: base of the Judithian to the top of the Late/Upper Maastrichtian or 83.50000 to 66.00000 Ma

Collections (37 total)


Time interval Ma Country or state Original ID and collection number
Judithian83.5 - 70.6Canada (Alberta) Pediomys hatcheri (14463)
Lancian70.6 - 66.0Canada (Alberta) Pediomys hatcheri (14630)
Lancian70.6 - 66.0USA (Colorado) Protolambda hatcheri (96082 96083)
Lancian70.6 - 66.0USA (South Dakota) Pediomys hatcheri (14537 14604 14612)
Lancian70.6 - 66.0USA (Wyoming) Pediomys hatcheri (14505 14519 14527 14538 14561 14565 14566 14598)
Lancian70.6 - 66.0Canada (Saskatchewan) Pediomys hatcheri (14558)
Lancian70.6 - 66.0USA (Montana) Pediomys hatcheri (14515 14516 14517 14523 14534 14549 14575 14576 14582 14583 14597 14608 14616 14624 14647 14649 14652 172642 172644)
Lancian70.6 - 66.0USA (Utah) Pediomys hatcheri (14607)
Late/Upper Maastrichtian70.6 - 66.0USA (Wyoming) Pediomys hatcheri (14585)