Kaprosuchus

Kaprosuchus
Evolúciós időszak: késő kréta 95 Ma
↓
A Kaprosuchus saharicus koponyája
A Kaprosuchus saharicus koponyája
Természetvédelmi státusz
Fosszilis
Rendszertani besorolás
Ország: Állatok (Animalia)
Törzs: Gerinchúrosok (Chordata)
Altörzs: Gerincesek (Vertebrata)
Osztály: Hüllők (Reptilia)
Öregrend: Crocodylomorpha
Család: † Mahajangasuchidae
Nem: † Kaprosuchus
Sereno & Larsson, 2009[1]
Fajok
  • K. saharicus Sereno & Larsson (típus)
Hivatkozások
Wikifajok
Wikifajok

A Wikifajok tartalmaz Kaprosuchus témájú rendszertani információt.

Commons
Commons

A Wikimédia Commons tartalmaz Kaprosuchus témájú médiaállományokat és Kaprosuchus témájú kategóriát.

A Kaprosuchus (nevének jelentése: 'vadkan krokodil') a Mahajangasuchidae családba tartozó kihalt hüllőnem, amely a késő kréta kor cenomani időszakában, 95 millió évvel ezelőtt élt. Maradványait a nigeri Echkar-formációban találták meg. Neve vaddisznóéra emlékeztető agyaraira és fejformájára utal. A nemet először Paul Sereno és Hans Larsson írta le 2009-ben.[1]

Anatómia, osztályozás

A Kaprosuchus eddig egyetlen, csaknem teljesen ép, 507 mm hosszú koponyáról ismeretes. Legfeltűnőbb bélyegei a hosszú, agyarszerűen kiálló fogai, valamint a fejtetőről hátrafelé kiinduló szarvszerű nyúlványok. A Kaprosuchus fogai a modern krokodilokéval ellentétben oldalról lapítottak és határozott éllel rendelkeznek, a szemgödrök pedig oldalra és előre nyílnak, nem pedig felfelé.

A Kaprosuchus a Mahajangasuchus mellett a Mahajangasuchidae családba tartozik. Mindkét nem Afrikában élt (a Mahajangasuchus leleteit Madagaszkáron találták meg).[1]

A koponya háti (bal) és hasi (jobb) oldala. Hossza: 507 mm[1]

Táplálkozás

A Kaprosuchus, mint a legtöbb rokona, ragadozó életmódot folytatott. Az állat koponyájának egyes bélyegei alapján korábban úgy gondolták, hogy a Kaprosuchus elsősorban a szárazföldön való vadászathoz alkalmazkodott, ennek megfelelően a faj számos illusztráción látható hosszú, futásra alkalmas végtagokkal ábrázolva. Az újabb keletű kutatások azonban mégis inkább a mai krokodilokéhoz hasonló, vízhez kötött életmódot látszanak igazolni.[2]

Jegyzetek

  1. ↑ a b c d Sereno, Paul; Larsson, Hans (2009. november 19.). „Cretaceous Crocodyliforms from the Sahara”. ZooKeys 28, 1–143. o. DOI:10.3897/zookeys.28.325. ISSN 1313-2970. 
  2. ↑ Wilberg, Eric W., Christopher A. (2019. január 24.). „Evolutionary structure and timing of major habitat shifts in Crocodylomorpha” (angol nyelven). Scientific Reports 9 (1). DOI:10.1038/s41598-018-36795-1. ISSN 2045-2322. 

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