Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Placoolithus taohensis

Osteichthyes - Dendroolithidae

Taxonomy
Placoolithus taohensis was named by Zhao and Zhao (1998). It is considered to be a form taxon. Its type specimen is IVPP V11569.1 (field no. 7530), an egg (nest with 9 eggs), and it is a 3D body fossil. Its type locality is Majiacun, Taohe (IVPP Loc. 7530), which is in a Coniacian/Santonian terrestrial horizon in the Majiacun Formation of China. It is the type species of Placoolithus.

Synonymy list
YearName and author
1997Placoolithus taohensis Mikhailov p. 79
1998Placoolithus taohensis Zhao and Zhao pp. 284, 291 figs. Pl. I, fig. 1–4
2002Placoolithus taohensis Cousin p. 47
2002Placoolithus taohensis Zhou and Feng p. 69
2009Placoolithus taohensis Liang et al. p. 1591
2018Placoolithus taohensis Zhang et al. p. 677

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
RankNameAuthor
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Saurischia()
—Theropoda()
—Neotheropoda
—AverostraPaul 2002
—Tetanurae
—Coelurosauria()
—Maniraptoriformes
—TherizinosauriaRussell 1997
superfamilyTherizinosauroidea
familyDendroolithidae
genusPlacoolithus
speciestaohensis

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.

†Placoolithus taohensis Zhao and Zhao 1998
show all | hide all
Diagnosis
ReferenceDiagnosis
H. Zhao and Z. Zhao 1998Eggs nearly spherical and disposed at random in the nest. Eggshells
consisting of incomplete basic structure units. No obvious mark between cone layer
and columnar layer. Columns branching asymmetrically. Outer parts of the columns
connecting or interlocking, forming a continuous layer taking up 1/2 eggshell
thickness or 2/3 columnar height. Few pores on their outer surface. Pore canals very
developed, causing a big complex pore system.
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: terrestrialsuperf
Locomotion: actively mobileo
Life habit: ground dwellingsuperf
Diet: herbivoresuperf
Reproduction: oviparoussuperf
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2005-09-11 17:03:44
Modified: 2005-09-11 19:03:44
Source: superf = superfamily, o = order
References: Holtz et al. 2000, Kiessling 2004, Marsh 1875

Age range: base of the Late/Upper Coniacian to the top of the Late/Upper Santonian or 89.80000 to 83.60000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Late/Upper Coniacian - Late/Upper Santonian89.8 - 83.6China (Henan) Placoolithus taohensis (type locality: 275539)