Pterosauria: Ni ba "dinosaur mai tashi" ba ne
A fahimtarmu, dinosaurs su ne shugabannin duniya a zamanin da. Mun ɗauka cewa dabbobi makamantan wannan a wancan lokacin duk an rarraba su cikin rukunin dinosaurs. Don haka, Pterosauria sun zama "dinosaurs masu tashi". A gaskiya ma, Pterosauria ba dinosaurs ba ne!
Dinosaurs na nufin wasu dabbobi masu rarrafe na ƙasa waɗanda za su iya ɗaukar tafiya madaidaiciya, ban da pterosaurs. Pterosauria dabbobi ne masu rarrafe kawai, tare da dinosaur duka suna cikin magudanar juyin halitta na Ornithodira. Wato, pterosauria da dinosaur suna kama da "'yan uwan". Su dangi ne na kud da kud, kuma su ne hanyoyi biyu na juyin halitta waɗanda suka rayu a lokaci ɗaya, kuma kakanni na baya-bayan nan ana kiransa Ornithischiosaurus.
Ci gaban reshe
Ƙasar ta mamaye da dinosaurs, kuma sararin samaniya ya mamaye da pterosaurs. Su iyali ne, ta yaya ɗaya yake sama ɗayan kuma yana ƙasa?
A yammacin lardin Liaoning na kasar Sin, an sami wani ƙwai na pterosauria wanda aka matse amma bai nuna alamun karyewa ba. An lura cewa fatar fikafikan tayi a ciki sun girma sosai, wanda ke nufin cewa pterosauria na iya tashi jim kaɗan bayan haihuwa.
Binciken da masana da yawa suka gudanar ya nuna cewa pterosauria na farko ya samo asali ne daga ƙananan kwari masu gudu a ƙasa masu dogayen kafafu kamar Scleromochlus, waɗanda ke da membrane a ƙafafunsu na baya, suna miƙewa zuwa jiki ko wutsiya. Wataƙila saboda buƙatar rayuwa da farauta, fatarsu ta yi girma kuma a hankali ta zama siffar kama da fikafikai. Don haka ana iya tuƙa su sama a hankali su zama dabbobi masu rarrafe masu tashi.
Burbushin halittu sun nuna cewa da farko waɗannan ƙananan yaran ba ƙanana kawai ba ne, har ma da tsarin ƙasusuwan da ke cikin fikafikan ba a bayyane yake ba. Amma a hankali, sun ɓullo zuwa sama, kuma babban fikafikan Pterosauria mai gajeren wutsiya mai tashi a hankali ya maye gurbin "dwarfs", kuma daga ƙarshe ya zama mamaye sararin samaniya.
A shekara ta 2001, an gano wani burbushin pterosauria a Jamus. An adana fikafikan burbushin a wani ɓangare. Masana kimiyya sun haskaka shi da hasken ultraviolet kuma sun gano cewa fikafikansa fata ce mai jijiyoyin jini, tsokoki da dogayen zare. Zare na iya tallafawa fikafikan, kuma ana iya jan fatar jikinta sosai, ko kuma a naɗe ta kamar fanka. Kuma a shekara ta 2018, burbushin pterosauria guda biyu da aka gano a China sun nuna cewa suna da gashin fuka-fukai na asali, amma ba kamar gashin fuka-fukan tsuntsaye ba, gashin fuka-fukansu ƙanana ne kuma sun fi laushi wanda za a iya amfani da shi don kula da zafin jiki.
Da wahalar tashi
Shin ka sani? Daga cikin burbushin da aka gano, fikafikan babban pterosauria na iya faɗaɗa mita 10. Saboda haka, wasu ƙwararru suna ganin cewa ko da suna da fikafikai biyu, wasu manyan pterosauria ba za su iya tashi sama kamar tsuntsaye na dogon lokaci da nisa ba, kuma wasu mutane ma suna tunanin cewa ba za su taɓa tashi sama ba kwata-kwata! Domin suna da nauyi sosai!
Duk da haka, yadda pterosauria ke tashi har yanzu ba a kammala ba. Wasu masana kimiyya kuma suna hasashen cewa wataƙila pterosauria ba ta yi amfani da shawagi kamar tsuntsaye ba, amma fikafikansu sun samo asali ne daban-daban, suna samar da wani tsari na musamman na iska. Duk da cewa manyan pterosauria suna buƙatar gaɓoɓi masu ƙarfi don sauka daga ƙasa, amma ƙasusuwa masu kauri sun sa su yi nauyi sosai. Ba da daɗewa ba, suka gano wata hanya! Kasusuwan fikafikan pterosauria sun rikide zuwa bututu masu ramuka masu siraran bango, wanda ya ba su damar "rage nauyi" cikin nasara, suna zama masu sassauƙa da nauyi, kuma suna iya tashi cikin sauƙi.
Wasu kuma sun ce pterosauria ba wai kawai tana iya tashi ba, har ma tana shawagi kamar gaggafa don farautar kifaye daga saman teku, tafkuna, da koguna. Tashi ya ba pterosauria damar yin tafiya mai nisa, tserewa daga mafarauta da kuma haɓaka sabbin wurare.
Kawah Dinosaur Official Website:www.kawahdinosaur.com
Lokacin Saƙo: Nuwamba-18-2019