Sisteronia

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

Yayitya: InyamaIi-ichthyosauriiCretaceous yokuqala ukuya ku-iCretaceous yamvaNgokwenene ayisiyo dayinaso

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

Inyani emnandi: esi sirhubuluzi saselwandle sasiqubha ngelixa iidayinaso zazihamba emhlabeni. Wonke umntu uzibiza ngokuba ziidayinaso, kodwa zazilisebe elahlukileyo lezirhubuluzi.

Yaphila

113 ukuya ku-94 izigidi zeminyaka eyadlulayo3

iCretaceous yokuqala ukuya ku-iCretaceous yamva

Iifosili zifunyenwe:

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

Esona santya siphezulu

malunga ne-46 km/h (29 mph)

Ukuqubha, uqikelelo

Yaphila nini?

iTriassic

iJurassic

iCretaceous

Izigidi ezingama-252 zeminyaka eyadlulayo20114566, i-asteroyidi

Yayikhawuleza kangakanani?

Umntu ohambayo malunga ne-5 km/h (3 mph)

Umntwana ekhwele ibhayisikile malunga ne-12 km/h (7 mph)

Sisteronia malunga ne-46 km/h (29 mph)

Ihashe elibaleka ngamandla malunga ne-65 km/h (40 mph)

Ingwenkala malunga ne-100 km/h (62 mph)

izinto ezimnandi

Iinyani ezimnandi

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

Umfanekiso owenziwe yi-AI: Sisteronia — Umfanekiso owenziwe yi-AI obonisa indlela Sisteronia esenokuba wayekhangeleka ngayo, wenziwe yikhompyutha ngokwento eyaziwa zizazinzulu. Kukuqikelela nje: esona silwanyana sinokuba sasikhangeleka ngenye indlela, kwaye akukho mntu waziyo imibala yaso yokwenyani.

Kwiingcali zeedayinaso

Igama lenzululwazi: Sisteronia
Inikwe igama ngu:: Fischer et al. 20143
Iqela: Ii-ichthyosauri
Usapho / iclade: Ophthalmosauridae3
Ukuhlelwa: Ichthyosauria > Ichthyosauromorpha3
Ubudala bamatye: 113 ukuya ku-94 izigidi zeminyaka (Albian / Cenomanian)3
Izakhiwo zamatye: Marnes bleues, West Melbury Marly Chalk, Gault3
Amazwe: iUnited Kingdom, iFransi, iRashiya3
Iirekhodi zeefosili: 6 kwi-Paleobiology Database3
Ukufunyanwa: 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
Kusaxoxwa ngayo: 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

Apho iinyani zivela khona

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): ubudala, iindawo, izakhiwo zamatye, ukuhlelwa.

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