Sisteronia

Hiika maqaa: “Sister's own, named after the Sisteron region in France”1

Kan nyaate: FoonIkteyoosarootaKireetaashasii Jalqabaa hanga Kireetaashasii DhumaaSeera saayinsiitiin daayinoosarii miti

Sisteronia was a fast-swimming marine reptile that lived in the Cretaceous seas. It had sharp teeth for catching small fish and squid. Sisteronia was an ichthyosaur, not a dinosaur, and looked a bit like a modern dolphin.1 2

Odeeffannoo bashannansiisaa: harkifataan galaanaa kun yeroo daayinoosarootni lafa irra deemaa turan daakaa ture. Namni hundi daayinoo jedhee isaan waama, garuu damee harkifattootaa adda ta'e turan.

Kan jiraate

waggaa miliyoona 113 hanga 94 dura3

Kireetaashasii Jalqabaa hanga Kireetaashasii Dhumaa

Fosiliiwwan kan itti argaman

England (Gault Formation, Cambridge Greensand Member), France (Vocontian Basin), and Russia3 1

Saffisa ol'aanaa

gara 46 km/sa'a (29 mph)

Daakuu, tilmaama

Yoom jiraate?

Tiraayaasikii

Juraasikii

Kireetaashasii

waggaa miliyoona 252 dura20114566, asteerooyidii

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)

Sisteronia gara 46 km/sa'a (29 mph)

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

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

wantoota bareedoo

Odeeffannoowwan bashannansiisoo

Sisteronia had teeth that were rectangular in cross-section, which is unusual among ichthyosaurs.2

It lived during the Albian and early Cenomanian stages of the Cretaceous, about 112 to 100 million years ago.2

Sisteronia is known from fossils found in England, France, and Russia, showing it lived in the seas of western Europe.3

This ichthyosaur belonged to the group Platypterygiinae, which were the last surviving ichthyosaurs before they went extinct.2

The name Sisteronia comes from the town of Sisteron in France, near where some of its fossils were found.1

Sisteronia had a raised process on the floor of the foramen magnum (the hole in the skull for the spinal cord), a unique feature not seen in other ichthyosaurs.2

Fakkii AI'n hojjetame: Sisteronia — Fakkii AI'n hojjetame kan Sisteronia 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.

Ogeeyyii daayinootiif

Maqaa saayinsii: Sisteronia
Kan maqaa baase: Fischer et al. 20143
Garee: Ikteyoosaroota
Maatii / kilaadii: Ophthalmosauridae3
Ramaddii: Ichthyosauria > Ichthyosauromorpha3
Umurii dhagaawwanii: waggaa miliyoona 113 hanga 94 (Albian / Cenomanian)3
Caasaawwan dhagaa: Marnes bleues, West Melbury Marly Chalk, Gault3
Biyyoota: Biriteen, Faransaay, Raashiyaa3
Galmee fosilii: 6 The Paleobiology Database keessa3
Argannoo: Sisteronia was named by Fischer and colleagues in 2014, based on fossils from the Cambridge Greensand Member in England and the Vocontian Basin in France.3 1
Ammallee falmisiisaa: Scientists are still debating exactly how diverse late Cretaceous ichthyosaurs were, and whether Sisteronia was part of a broader European hotspot of ichthyosaur diversity.1

Odeeffannoon eessaa dhufa

High Diversity in Cretaceous Ichthyosaurs from Europe Prior to Their Extinction (pmc.ncbi.nlm.nih.gov)
Sisteronia (en.wikipedia.org)
Sisteronia in The Paleobiology Database (CC BY 4.0): umurii, bakkeewwan, caasaawwan dhagaa, ramaddii.

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