Je zuwa taken sashi: Irin nau'in dinosaurs
- Class: Amphibia = Amphibians
- Umarni: Temnospondyli † =
- Iyali: Mastodonsauridae † = Mastodonosaurids
- HALITTA: Mastodonsaurus † = Mastodonosaurus
- Jinsuna: Mastodonsaurus jaegeri † = Mastodonosaurus
- Abubuwa: Mastodonsaurus giganteus † = Mastodonosaurus
- Jinsuna: Mastodonsaurus torvus † = Mastodonosaurus
Mastodonosaurus
Mastodonosaurs ya rayu shekaru miliyan 250 da suka gabata. Kakanninsu na stegocephals ne. Wani nau'in halitta shine Mastodonsaurus giganteus, wanda G. Yeager ya bayyana a 1828 kan ragowar Tarihin Tsakiyan na Jamus. An gano su a Guildorf kuma sun ƙunshi haƙori da ɓangaren ɓangaren occipital, yana kwance kusa, amma masu tattara da yawa sun ba da su ga dakin gwaje-gwaje. Ko yaya dai, Yeager ya danganta hakori ga mai rarrafe (a zahiri Mastodonsaurus), da kuma nape, wanda ya danganta da kasancewar hadarurruka biyu, ya danganta shi ga 'yan amphibians (kwayoyin halittar Salamandroides).
Mastodonosaurs sune masu cin gashin kansu na ƙarni na ƙaƙƙarfan tunani, watakila kusan ba barin ruwan. Suna farautar kifaye saboda kifi kuma sabili da haka da wuya su bar yanayin ruwa. Suna kwance cikin ruwa suna jira ganima, kuma lokacin da ganima ta gabato, suka kama ta.
Dabbobin mastodonosaurus babbar dabba ce, jimlar zata iya kaiwa har zuwa 6 m, kuma kai kadai basu wuce mita a tsayi ba. Da farko dai, an yi imanin cewa tsawon kwanyar ya kusan kashi daya bisa uku na jimlar, amma binciken cikakkun kasusuwa daga Kupferzell ya nuna cewa wannan ba haka bane. A zahiri, kwanyar ya kusan kwata na duka tsawon, ko ma ƙasa da haka. Hannun ƙwayar mastodonosaurus ya kasance mai rauni. Jikin ya yi kama da na macijin, amma mai kauri kuma yana da yawa. A cewar wasu masu binciken, a bayyanar sun yi kama da manyan kwaɗi. Saransar.
Kwanyar kwanyar ta mastodonosaurus tana da girman triangular a cikin shimfida, lebur, amma tare da babban occiput; kwanyar ya kai 1.25-1.4 m. Kasusuwa kwanyar na da kauri Aka hada kwandon ido, tare kuma aka samu kusan a tsakiyar tsakiyar kwanyar, ana jagora sama. Bonearfin gaban yana kafa ɓarin ciki na kewayar orbit, orbit - ba tare da yin lafazi ba. Ana zuwa bayan tsohuwar kasusuwa na kasusuwa a gefe. Auricles ne ƙanana, buɗe. Mafi girman fuskokin bangarorin sashin cinya a kwanyar suna da kyau, kwanyar an rufe shi da sassaka mai zane-zane (alama ce ta gano kwayoyin halittar mutum). A gaban kafafen hancin hannu biyu ne ramuka wadda ta, tare da rufe bakin, yatsun “firam” daga cikin ƙananan muƙamuƙin. Jawaramin muƙamula tare da babban tsari. Hakora suna da yawa, ƙarami, akan maxilla an shirya su a cikin layuka 2. Manyan "fangs" suna cikin sama.
Fatar waɗannan dabbobin ta kasance mai narkewa tare da glandon mucous.
Mai yiwuwa sunan ɗan asalin yana da alaƙa da mastoid na hakora, kuma ba tare da girman girman su ba (haƙoran farko da aka samo sune, a fili, "ƙato") na ƙananan muƙamuƙin). Abin ban sha'awa shine, an riga an san wuraren da ke cikin gidan bayan ƙarni na 19, amma ba a bayyana su yadda ya dace. Daga nan ne ra'ayin cewa mastodonosaurus ya kasance sama da shekaru 100 a matsayin babban kumburi, wanda R. Owen ya fara. A lokaci guda, R. Dawson, tuni a ƙarshen karni kafin ƙarshe, ya rubuta cewa Triassic labyrinthodonts sun yi kama da sababbin ko karikoki.
Mastodonosaurus
Mulkin: | Dabbobi |
Nau'i: | Chordate |
Subtype: | Vertebrates |
Gilashi: | Tetrapods |
Fasali: | Amphibians |
Squad: | Takamatsu |
Iyali: | Mastodonsauridae |
Jinsi: | Mastodonsaurus |
- M. jaegeri
- M. giganteus
- M. torvus
Mastodonosaurus (lat. Mastodonsaurus) - babban wakilin labyrinthodonts na zamanin Triassic.
Bayanin
Tarshen ƙasa mai cin naman kifaye, galibi ba barin ruwan.
Kwanyar kwanyar tafinfin fatar mutum (Mastodonosaurus) mai siffar triangular ne a siffar, lebur, amma tare da babban occiput, tsawon kwanyar ya kai 1.75-2 m. Orbits din yana kusa, yana a kusan tsakiyar tsakiyar kwanyar, ana yinshi sama. Bonearfin gaban yana kafa ɓarin ciki na kewayar orbit, orbit - ba tare da yin lafazi ba. Kasusuwa na kwanyar suna da kauri sosai. Ana zuwa bayan tsohuwar kasusuwa na kasusuwa a gefe. Auricles ne ƙanana, buɗe. Mafi girman fuskokin bangarorin sashin cinya a kwanyar suna da kyau, kwanyar an rufe shi da sassaka mai zane-zane (alama ce ta gano kwayoyin halittar mutum).
A gaban kafafen hancin hannu biyu ne ramuka wadda ta, tare da rufe bakin, yatsun “firam” daga cikin ƙananan muƙamuƙin. Jawaramin muƙamula tare da babban tsari. Hakora suna da yawa, ƙarami, akan maxilla an shirya su a cikin layuka 2. Manyan "fanguna" suna kan ganima.
Da farko dai, an yi imanin cewa tsawon kwanyar ya kusan kashi daya bisa uku na jimlar, amma binciken cikakkun kasusuwa daga Kupferzell ya nuna cewa wannan ba haka bane. A zahiri, kwanyar ya kusan kwata na duka tsawon, ko ma ƙasa da haka.
Gashinan baya da rauni. Jikin ya yi kama da na macijin, amma mai kauri kuma yana da yawa. Stereoscopic vertebrae. Jimlar zata iya kaiwa zuwa 9 m.
Labarin Gano
Nau'in kallo - Mastodonsaurus giganteus, wanda G. Yeager ya bayyana a cikin 1828 kan ragowar ragowar Tarihin Tsakiyan na Jamus. An gano su a Guildorf kuma sun ƙunshi haƙori da ɓangaren ɓangaren occipital, yana kwance kusa, amma masu tattara da yawa sun ba da su ga dakin gwaje-gwaje. Koyaya, Yeager ya danganta haƙora ga mai rarrafe (a zahiri Mastodonsaurus), da kuma nape, wanda ya danganta da kasancewar wasu kwaro biyu, an sanya su a matsayin amarya (usan asalin halitta) Salamandroides).
Mai yiwuwa sunan ɗan asalin yana da alaƙa da mastoid na hakora, kuma ba tare da girman girman su ba (haƙoran farko da aka samo sune, a fili, "ƙato") na ƙananan muƙamuƙin). Kalaman wannan nau'in sune Mastodonsaurus salamandroides, Labyrinthodon jaegeri, Mastodonsaurus jaegeri, Mastodonsaurus acuminatus.
Abin ban sha'awa shine, an riga an san wuraren da ke cikin gidan bayan ƙarni na 19, amma ba a bayyana su yadda ya dace. Daga nan ne ra'ayin da mastodonosaurus ya kasance sama da shekaru 100 a matsayin babban kumburi, wanda R. Owen ya fara. A lokaci guda, R. Dawson, wanda ya kasance a ƙarshen karni kafin ƙarshe, ya rubuta cewa Triassic labyrinthodonts sun fi kama da sababbin ko karikoki. Ya zo daga Ladinia Jamus (Baden-Württemberg, Bavaria, Thuringia).
M. torvus - nau'in na biyu wanda ya samo asali daga Triassic of Urals (yankin Orenburg da Bashkiria). Sanarwa daga E. D. Konzhukova a cikin 1955. Wanda aka sani da ragowar guntu (kwanyar a cikin Gidan kayan tarihin PIN - sake gini). Ba shi da ƙasa da girma ga tsarin Jamusawa.