Genus
Formal taxon Extinct

Subtiliolithus

Mikhailov 1991

Subtiliolithus is an oogenus of fossil egg from the Nemegt Formation of Mongolia and the Ohyamashimo Formation of Japan. The eggs are notable for a very thin eggshell. It contains three oospecies: S. hyogoensis, S. kachchhensis and S. microtuberculatus. They were originally classified as a distinct oofamily, Subtiliolithidae, but numerous similarities to Laevisoolithus have led to their reclassification as Laevisoolithid eggs. A complete skeleton of Nanantius valifanovi was found associated with Subtiliolithus eggshells, indicating that the oogenus represents eggs of enantiornithine birds.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
5
Group
Dinosaures
Carnivore Ground dwelling, solitary Terrestrial
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PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Theropoda Unranked clade
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Laevisoolithidae Family
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Subtiliolithus Genus
Fossil sites 5 geolocated sites
Distribution
Top countries
🇯🇵 Japan
2
🇮🇳 India
2
🇲🇳 Mongolia
1
Geological formations
Ohyamashimo
2
Nemegt
1
Temporal distribution
Maastrichtian (72.2–66 Ma)
3
Albian (113.2–100.5 Ma)
2
Species (3)
Subtiliolithus hyogoensis 113 Ma
Subtiliolithus kachchhensis 72 Ma
Subtiliolithus microtuberculatus 72 Ma
Bibliography
Original description
K. E. Mikhailov. 1991. Classification of fossil eggshells of amniotic vertebrates. Acta Palaeontologica Polonica 36(2):193-238
Bibliography (4)
K. Tanaka, D. K. Zelenitsky, and F. Therrien, T. Ikeda, K. Kubota, H. Saegusa, T. Tanaka, K. Ikuno. 2020. Exceptionally small theropod eggs from the Lower Cretaceous Ohyamashimo Formation of Tamba, Hyogo Prefecture, Japan. Cretaceous Research 114:104519:1-14 DOI ↗
A. Khosla, G. V. R. Prasad, and O. Verma, A. K. Jain, A. Sahni. 2004. Discovery of a micromammal-yielding Deccan intertrappean site near Kisalpuri, Dindori District, Madhya Pradesh. Current Science 87(3):380-383
A. Khosla and A. Sahni. 1995. Parataxonomic classification of Late Cretaceous dinosaur eggshells from India. Journal of the Palaeontological Society of India 40:87-102
K. E. Mikhailov. 1991. Classification of fossil eggshells of amniotic vertebrates. Acta Palaeontologica Polonica 36(2):193-238