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Paceyodon davidi

Morganucodonta

Taxonomy
Paceyodon davidi was named by Clemens (2011). Its type specimen is NHMUK M45920, a tooth (right lower molariform), and it is a 3D body fossil. Its type locality is Pant 4 (St. Bride's Island), which is in a Hettangian/Sinemurian fissure fill limestone/marl in the United Kingdom. It is the type species of Paceyodon.

Synonymy list
YearName and author
2011Paceyodon davidi Clemens p. 1150 fig. 5

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
RankNameAuthor
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
orderMorganucodontaKermack et al. 1973
genusPaceyodon
speciesdavidi

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.

†Paceyodon davidi Clemens 2011
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Diagnosis
ReferenceDiagnosis
W. A. Clemens 2011The crown of the type and only specimen, interpreted to be a right lower molariform, is larger than lower molariforms of all currently known morganucodontans (sensu Kielan-Jaworowska et al. 2004) and most other Late Triassic or Early Jurassic mammaliaforms. Principal cusps are aligned along either side of an axis that diverges mesiobuccally from the mesiodistal axis of the crown. The mesiolingual shelf, which presumably carried cusp e, is exceptionally large and salient mesially, but lacks a notch to form an interlock with the preceding postcanine. If present, cusp g was relatively small. At the level of cusp c, the crown is narrower than its mesial end and then tapers distally. The two roots are large and not widely separated.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialuc
Locomotion: actively mobilec
Life habit: scansorialuc
Diet: insectivoreuc
Created: 2011-04-24 23:35:11
Modified: 2011-04-24 08:35:11
Source: c = class, subp = subphylum, uc = unranked clade
References: Carroll 1988, Hendy et al. 2009, Luo et al. 2003

Age range: base of the Hettangian to the top of the Sinemurian or 201.30000 to 190.80000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Hettangian - Sinemurian201.3 - 190.8United Kingdom (Wales) Paceyodon davidi (type locality: 46137)