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Ptaiochen pau

Reptilia - Anseriformes - Anatidae

Taxonomy
Ptaiochen pau was named by Olson and James (1991). Its type specimen is USNM 384776, a partial skull (cranium,rostrum,and mandiblelackingthe rightpost- dentaryportion), and it is a 3D body fossil. Its type locality is Auwahi Cave, which is in a Holocene cave horizon in Hawaii. It is the type species of Ptaiochen.

Synonymy list
YearName and author
1991Ptaiochen pau Olson and James p. 39

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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
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
RankNameAuthor
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Theropoda()
—Neotheropoda
—AverostraPaul 2002
—Tetanurae
—Coelurosauria()
—Maniraptora
—Paraves
classAves
subclassNeornithesGadow 1893
—Neognathae(Pycraft 1900)
—PangalloanseraeGauthier and de Queiroz 2001
—GalloanseraeSibley and Ahlquist 1990
superorderGalloanserimorphae
orderAnseriformesWagler 1831
familyAnatidaeVigors 1825
genusPtaiochen
speciespau

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.

†Ptaiochen pau Olson and James 1991
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Diagnosis
ReferenceDiagnosis
S. L. Olson and H. F. James 1991Similar to Thambetochenin having both jaws with bony toothlike projections, while lacking the very deep rostrum of Chelychelynechen.Differs from Thambetochenin having the rostrumproportionatelyshorter,the nostrils situated fartheranteriorly,with the rostraltip anteriorto the nostril being much shorter.The midline groove on the palatalsurfaceof the rostrumis deeperand
wider.The prefrontals(lacrimals)aremuchbetterdeveloped,extendingventrally and posteriorlytowardsthe equallywell developed postorbitalprocessesso as to come much closer to encirclingthe orbit than in Thambetochen.The roof of the orbitsis not expandedlaterallyand the ventralsurfacesdo not containimpressions for salt glands as in Thambetochen.The temporal fossae and the scars for at- tachment of the dorsal neck musculatureare much less extensive than in Tham- betochen,whereasthe scarfor M. depressormandibulaeis deeperand wider.The overall outline of the cranium in lateral and posterior views is more rounded,
ratherthan being flatteneddorsallyand squaredin posteriorview as in Tham- betochen.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: solitaryo
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: volanto
Diet: herbivoreo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2009-01-03 19:27:52
Modified: 2009-01-03 21:27:52
Source: o = order
References: Marsh 1875, Sedinger 1997

Age range: Holocene or 0.01170 to 0.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Holocene0.0117 - 0.0USA (Hawaii) Ptaiochen pau (type locality: 176476)