Himeoolithus

Naam beteken: “small egg stone, from Japanese 'hime' meaning small or pretty, and Greek 'oo' and 'lithos' meaning egg stone”1

Het geëet: VleisVleisvretende dino'sVroeë Kryt

Himeoolithus was a tiny meat-eating dinosaur that lived in what is now Japan about 110 million years ago. It is known from its eggs, which are some of the smallest theropod eggs ever found, about the size of a quail egg. These eggs show that small dinosaurs lived alongside the giants!2

Het geleef

113 tot 110 miljoen jaar gelede3

Vroeë Kryt

Fossiele gevind in

Kamitaki Egg Quarry, Hyogo Prefecture, Japan3 2

Topspoed

omtrent 47 km/h (29 mph)

Hardloop, skatting

Wanneer het dit geleef?

Trias

Jura

Kryt

252 miljoen jaar gelede20114566, die asteroïde

Hoe vinnig was dit?

'n Mens wat loop omtrent 5 km/h (3 mph)

'n Kind op 'n fiets omtrent 12 km/h (7 mph)

Himeoolithus omtrent 47 km/h (29 mph)

'n Galopperende perd omtrent 65 km/h (40 mph)

'n Jagluiperd omtrent 100 km/h (62 mph)

cool goed

Prettige feite

Himeoolithus eggs are the smallest non-avian theropod eggs known, with an estimated mass of only 9.9 grams, about the size of a modern quail egg.1

The eggs are unusually elongated for their size, with a length-to-width ratio of 2.25, which is more typical of larger theropod eggs.1

The nest was found in place, not moved by water or wind, because most eggshell fragments were positioned concave-up, which happens when they break in place.2

Over 1,300 eggshell fragments from Himeoolithus were found at the Kamitaki Egg Quarry, along with other small theropod eggs.2

The high diversity of small theropod eggs at this site makes it one of the most diverse Early Cretaceous egg localities known.2

KI-prent van Himeoolithus — 'n KI-prent van hoe Himeoolithus dalk gelyk het, deur 'n rekenaar gemaak uit wat wetenskaplikes weet. Dit is 'n raaiskoot: die regte dier het dalk anders gelyk, en niemand weet wat sy regte kleure was nie.

Mite-breker

Mite: Some people think all dinosaurs were huge, but Himeoolithus shows that many were small.

Waarheid: Himeoolithus eggs are tiny, and the dinosaur that laid them was likely small, showing that dinosaurs came in many sizes.2

Vir dino-kenners

Wetenskaplike naam: Himeoolithus
Benoem deur: Tanaka et al. 20203
Groep: Vleisvretende dino's
Familie / klade: Theropoda3
Klassifikasie: Theropoda3
Ouderdom van die rotse: 113 tot 110 miljoen jaar (Albian)3
Rotsformasies: Ohyamashimo3
Lande: Japan3
Fossielrekords: 1 in The Paleobiology Database3
Ontdekking: The eggs were first discovered in 2015 at the Kamitaki Egg Quarry in Japan, and the species was named by Tanaka and colleagues in 2020.2 3
Steeds omstrede: Scientists are not sure exactly which theropod dinosaur laid the eggs, since no bones of the adult have been found yet.2

Waar die feite vandaan kom

Exceptionally small theropod eggs from the Lower Cretaceous Ohyamashimo Formation of Tamba, Hyogo Prefecture, Japan (sciencedirect.com)
Tiny Japanese Dinosaur Eggs Help Unscramble Cretaceous Ecosystem | Research News - University of Tsukuba (tsukuba.ac.jp)
Himeoolithus in The Paleobiology Database (CC BY 4.0): ouderdom, plekke, rotsformasies, klassifikasie.

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