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Istiorachis

Hiika maqaa: “sail spine”1

Kan nyaate: BiqiltootaBiqiltuu-nyaattota afaan simbirroo qabanKireetaashasii Jalqabaa

Istiorachis was a plant-eating dinosaur that lived on the Isle of Wight over 120 million years ago. It had a tall sail on its back made of long spines, which might have helped it show off to other dinosaurs. It was about the size of an American bison and weighed as much as a small car.2

Kan jiraate

waggaa miliyoona 133 hanga 121 dura4

Kireetaashasii Jalqabaa

Fosiliiwwan kan itti argaman

Isle of Wight, England, UK1 2

Ulfaatina

1 toonii (2,200 lb)2

Ol-dheerina

2 m (6.6 ft)2

Saffisa ol'aanaa

gara 33 km/sa'a (21 mph)

Fiiguu, tilmaama

Yoom jiraate?

Tiraayaasikii

Juraasikii

Kireetaashasii

waggaa miliyoona 252 dura20114566, asteerooyidii

Hammam guddaa ture?

Hammam ol-dheeraa ture?

Hammam ulfaataa ture?

akka saree 50 ulfaata

akka habxuu 200 ulfaataakka ijoollee KG 53 ulfaataakka ijoollee mana barumsaa 31 ulfaataakka beeraa adii 2 ulfaatameetira 100 sekondii 11 keessatti fiiguu danda'a (namni hunda caalaa saffisaan 9.6 barbaada)

SI wajjin yoo wal bira qabamu, Istiorachis hammam guddaa ture?

Herrega qofa barbaadduu kee keessatti. Wanti tokkollee hin olkaa'amu, eessayyuu hin ergamu.

Hammam saffisaa ture?

Nama miilaan deemu gara 5 km/sa'a (3 mph)

Daa'ima saayikilii irra jiru gara 12 km/sa'a (7 mph)

Istiorachis gara 33 km/sa'a (21 mph)

Farda gulufu gara 65 km/sa'a (40 mph)

Cheetaa gara 100 km/sa'a (62 mph)

wantoota bareedoo

Odeeffannoowwan bashannansiisoo

Istiorachis had very long spines on its back and tail bones, making a sail-like structure that was probably used for showing off to mates or scaring predators.1

Its name honors Dame Ellen MacArthur, a famous sailor from the Isle of Wight who sailed solo around the world.1

The only known fossil of Istiorachis was found in a plant debris bed near Grange Chine on the Isle of Wight.1

Some of the skeleton was stolen by poachers before scientists could collect it.1

Istiorachis belonged to a group of dinosaurs called iguanodontians, which were common in the Early Cretaceous.2

The sail of Istiorachis was made of neural spines that were over four times taller than the main part of the backbone.1

Fakkii AI'n hojjetame: Istiorachis — Fakkii AI'n hojjetame kan Istiorachis maal fakkaachuu akka danda'u agarsiisu, kompiitaraan beekumsa saayintistootaa irratti hundaa'uun hojjetame. Tilmaama qofa: bineensi dhugaa adda ta'ee mul'achuu danda'a, halluu isaa dhugaa immoo namni beeku hin jiru.

ati gaafatte

Gaaffiiwwan waa'ee Istiorachis baay'ee gaafataman

?How big was Istiorachis?

It was about the size of an American bison, stood around two metres tall, and weighed about one tonne (1,000 kilograms).2

?What did Istiorachis eat?

It was a plant-eating dinosaur, so it ate plants like ferns, cycads and conifers that grew in its warm, forested environment.3

?Why did Istiorachis have a sail?

Scientists think the sail was mostly used for signalling, such as attracting mates or scaring predators, rather than for controlling body temperature.2 1

?When did Istiorachis live?

It lived more than 120 million years ago, during the Early Cretaceous Period (specifically the Barremian age).2 3

Ogeeyyii daayinootiif

Maqaa saayinsii: Istiorachis
Kan maqaa baase: Lockwood et al. 20254
Garee: Biqiltuu-nyaattota afaan simbirroo qaban
Maatii / kilaadii: Styracosterna4
Ramaddii: Ornithischia > Ornithopoda > Iguanodontia4
Umurii dhagaawwanii: waggaa miliyoona 133 hanga 121 (Hauterivian / Barremian)4
Caasaawwan dhagaa: Wessex4
Biyyoota: Biriteen4
Galmee fosilii: 1 The Paleobiology Database keessa4
Argannoo: Istiorachis was named in 2025 by Jeremy Lockwood, David Martill, and Susannah Maidment. The fossil was dug up by Nicholas Chase from the Wessex Formation on the Isle of Wight.1
Ammallee falmisiisaa: Scientists are not sure exactly what the sail was used for. It might have helped with walking on four legs, or it might have been for showing off to other dinosaurs.1

Odeeffannoon eessaa dhufa

The origins of neural spine elongation in iguanodontian dinosaurs and the osteology of a new sail-back styracosternan (Dinosauria, Ornithischia) from the Lower Cretaceous Wealden Group of England (onlinelibrary.wiley.com)
New sail-backed dinosaur species unearthed on the Isle of Wight | Natural History Museum (nhm.ac.uk)
Istiorachis (en.wikipedia.org)
Istiorachis in The Paleobiology Database (CC BY 4.0): umurii, bakkeewwan, caasaawwan dhagaa, ramaddii.

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