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Alostera saskatchewanensis

Osteichthyes - Zhelestidae

Taxonomy
Alostera saskatchewanensis was named by Fox (1989) [genotype]. Its type specimen is UALVP 22753, a tooth (left M1), and it is a 3D body fossil. Its type locality is Wounded Knee (WK), which is in a Lancian coarse channel fill sandstone in the Frenchman Formation of Canada. It is the type species of Alostera.

Synonyms
Synonymy list
YearName and author
1986Paranyctoides megakeros Lillegraven and McKenna p. 37
1989Alostera saskatchewanensis Fox pp. 29-30
2004Paranyctoides megakeros Kielan-Jaworowska et al. pp. 494, 506
2004Alostera saskatchewanensis Kielan-Jaworowska et al. pp. 495, 512

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
RankNameAuthor
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
familyZhelestidaeNessov 1990
genusAlostera
speciessaskatchewanensis

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.

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Invalid names: Paranyctoides megakeros Lillegraven and McKenna 1986 [synonym]
Diagnosis
ReferenceDiagnosis
R. C. Fox 1989A small, Late Cretaceous eutherian mammal with M1-2 of "leptictoid" pattern, having no stylar shelf or stylocone, mesostyle present on at least some upper molars; paracone and metacone separate at their bases; conules and protocone robust; precingulum short and narrow; postcingulum longer, wider than precingulum and lacking hypocone.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: scansorialsubc
Diet: insectivoresubc
Reproduction: viviparoussubc
Created: 2005-09-06 20:43:42
Modified: 2005-09-06 22:44:32
Source: subc = subclass, c = class, subp = subphylum
References: Ji et al. 2002, Carroll 1988, Hendy et al. 2009, Lillegraven 1979

Age range: base of the Late/Upper Campanian to the top of the Lancian or 83.60000 to 66.00000 Ma

Collections (7 total)


Time interval Ma Country or state Original ID and collection number
Judithian83.6 - 72.2USA (Wyoming) Paranyctoides megakeros (14439)
Late/Upper Campanian83.6 - 72.2USA (Wyoming) Paranyctoides megakeros (70269 70490)
Lancian72.2 - 66.0USA (Montana) Alostera saskatchewanensis (14516)
Lancian72.2 - 66.0Canada (Alberta) Alostera saskatchewanensis (14634)
Lancian72.2 - 66.0Canada (Saskatchewan) Alostera saskatchewanensis (14558 type locality: 14655)