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Kermackodontidae

Mammalia - Kermackodontidae

Synonymy list
YearName and author
1998Eleutherodontidae Kermack et al. p. 586
2000Eleutherodontidae Butler
2004Eleutherodontidae Kielan-Jaworowska et al. pp. 253, 258
2005Kermackodontidae Butler and Hooker p. 186
2013Eleutherodontidae Zhou et al.
2014Eleutherodontidae Bi et al.
2017Eleutherodontidae Luo et al. p. 326
2018Eleutherodontidae Huttenlocker et al.
2022Kermackodontidae Mao et al. p. 4

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
RankNameAuthor
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
classMammalia
Allotheria()
Euharamiyida
familyKermackodontidae
familyKermackodontidae

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.

Fm. †Kermackodontidae Butler and Hooker 2005
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G. †Butlerodon Mao et al. 2022
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Butlerodon quadratus Mao et al. 2022
G. †Kermackodon Butler and Hooker 2005
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Kermackodon oxfordensis Kermack et al. 1998
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Invalid names: Kermackodon multicuspis Butler and Hooker 2005 [synonym], Kirtlingtonia catenata Butler and Hooker 2005 [synonym], Millsodon superstes Butler and Hooker 2005 [synonym]
Invalid names: Kirtlingtonia Butler and Hooker 2005 [synonym], Millsodon Butler and Hooker 2005 [synonym]
Invalid names: Eleutherodontidae Kermack et al. 1998 [synonym]
Diagnosis
ReferenceDiagnosis
K. A. Kermack et al. 1998 (Eleutherodontidae)Suborder is monotypic, erected to include the family Eleutherodontidae nov. The diagnosis is the same as for the suborder.
P. M. Butler and J. J. Hooker 2005Second uppermolar wide mesially and narrowed distally. Cusps pointed when unworn, of unequal height; cusps of each row connected by a longitudinal crest. Lingual row markedly convex, the last cusp closing the central valley distally. Seven lingual cusps, the most mesial ones smallest. Five buccal cusps, of which the last two are large, and the first three are elevations on the mesial crest of the fourth. Anterobuccal ridge possibly represented by a rounded cingular shelf. Differs from “Plagiaulacida” (except possibly Albionbaataridae ofwhich M2 is unknown) in themore numerous, pointed cusps, joined by longitudinal crests (as opposed to blunt cusps separated by transverse grooves). Resembles most Paulchoffatiidae and differs from other “Plagiaulacida” in the pointed distal end of the tooth, curvature of the lingual row, and closure of the central valley by a distal cusp. Referred posterior lower premolar (p4) differs from other multituberculates in being triangular in side view, the blade rising to a central peak; and falling to cingulum level at the mesial and distal ends; there are four denticulations, three close together near the peak; buccal cusp row semicircular, confined to the distal end of the tooth and in continuity with the distal end of the blade.
F. Mao et al. 2022Differs from other Jurassic euharamiyidans in having heart-shaped P4 and upper molars with three longitudinal rows of cusps; a secondary cusp Ax and central cusp row (row Ax) present between cusp row A and row B; a secondary basin developed between row Ax and row A; the ultimate lower premolar (p4) bearing a few uneven serrations and a small basined dis- tal heel. Differs from Triassic “haramiyidans” in having well-developed cusps A1 and a1, small cusps between A1 and Ax, broad central basin, and development of more cusps on the basin margin. Differs from multituberculates in having molar teeth with basined crowns that bear transverse flutings with sharp edge, cusps with uneven size in which the distobuccal one is the largest on upper molars, P4 is heart-shaped, and p4 with a high crown that has a triangular profile in buccal or lingual view, a distal basined heel, a few unevenly spaced serrations, mesial end not truncated.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialc
Locomotion: actively mobilec
Life habit: scansorialuc
Diet: insectivoreuc
Created: 2005-09-06 19:53:51
Modified: 2005-09-07 19:44:02
Source: c = class, subp = subphylum, uc = unranked clade
References: Hopson 1973, Hendy et al. 2009, Carroll 1988, Luo et al. 2003

Age range: base of the Late/Upper Bathonian to the top of the Early/Lower Callovian or 167.70000 to 161.20000 Ma

Collections (7 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Bathonian167.7 - 164.7United Kingdom (England) Eleutherodon oxfordensis, Millsodon superstes, Kermackodon multicuspis (131073) Eleutherodontidae indet., Kermackodontidae indet., Butlerodon quadratus, Kermackodon sp. (224639) Kirtlingtonia catenata, Kermackodon multicuspis, Multituberculata indet. (39075) Multituberculata indet. (57124)
Early/Lower Callovian164.7 - 161.2China (Nei Mongol) Megaconus mammaliaformis (27891)
Oxfordian163.5 - 157.3China (Liaoning) Xianshou linglong, Xianshou songae, Maiopatagium furculiferum (91487)
Oxfordian163.5 - 157.3China (Hebei) Vilevolodon diplomylos (167300)