Zamanin Mesozoic yana dauke da lokaci guda 3 inda dinosaur suka bazu kuma suka kare. Wadannan lokuta guda uku sune: Triassic, Jurassic y Tsamiya. A tsakanin kowane lokaci akwai babban ci gaba na fauna da dinosaur, musamman ma Jurassic fauna. A yau zamu tattauna game da ci gaba da fadada faretin Fauna.
Idan kana son karin bayani game da fadada dinosaur din da Fauna mai laushi, wannan shine post din ku.
Fauna mai laushi
Duk tsawon shekaru miliyan 79 da wannan lokacin ya wanzu da kuma zamunnan biyu da suke dashi, faretin Caca ya mamaye galibi dinosaur. A wancan lokacin akwai nau'ikan nau'ikan dinosaur na ruwa da na duniya. Bugu da kari, wasu kifaye da invertebrates suma sun bazu. Dabbobi masu shayarwa a wannan lokacin sun kasance ƙananan rukuni amma sun fara haɓaka a cikin wannan lokacin.
Zamu binciko daya bayan daya nau'ikan dabbobin da suka bunkasa a lokacin Kretta.
Invertebrates
Daga cikin dukkanin ƙananan ƙwayoyin da suka ci gaba, musamman ma a cikin yanayin ruwan teku, zamu iya ambaton mollusks. Daga cikin maƙerin, ammonoids waɗanda suke cephalopods ne suka fito waje. Sauran invertebrates da suka yadu sune coleoids da nautiloids.
Phylum na echinoderms yana da haɓaka a wannan lokacin. A cikin wannan phylum mun haskaka wasu daga cikin manyan nau'in kifin kifi, echinoids, da ophiuroids. Duk waɗannan bayanan an tattara su ne saboda burbushin abubuwan da aka sani da amber. Waɗannan rukunin yanar gizon suna ƙunshe da babban bayani game da cututtukan zuciya. Ya yiwu a samo kwatancen gizo-gizo, mazari, ƙudan zuma, wasps, butterflies, tururuwa, ciyawar ciyawa, da sauransu.
Vertebrates
Hakanan Vertebrates sun sami yaduwa sosai a lokacin Cretaceous. Mafi shahararrun cikin wannan rukunin sune dabbobi masu rarrafe. A cikin rukunin dabbobi masu rarrafe, dinosaur din ya fita dabam a cikin muhallin halittu da kuma na muhallin tekun. Wadannan dinosaur din sun rayu tare da dabbobi masu rarrafe da kifi.
A cikin tsarin halittu na cikin ƙasa ƙungiyar dabbobi masu shayarwa sun fara haɓaka a hankali. Yunkurinsa ya fara ne da wasu nau'ikan halittun da suka samo asali daga mazaunin ruwa. Hakanan ya faru da ƙungiyar tsuntsaye.
Mahimmancin dinosaur a cikin faretin Cretaceous
Kamar yadda muka ambata a baya, dinosaur sun zama muhimmin ɓangare na faretin Cretaceous. Kuma wannan shine a wannan lokacin, a matsayin shekarun zinariya na dinosaur, Dukkanin dinosaur na maciji da na dabbobi masu ci gaba harma da na ruwa. Za mu bincika kowane ɗayansu.
Dinosaur na ƙasa
Ya kasance rukuni mafi banbanci a duk tsawon wannan lokacin. Sun kasu kashi biyu manyan kungiyoyi bisa tsarin abincin su. A gefe guda, muna da dinosaur masu cin nama, kuma a dayan, ciyawar ciyawar.
Dinosaur mai tsire-tsire
An kuma san su da sunan ornithopods. Wannan rukunin dinosaur din yana da abincin da ya kunshi tsirrai kawai. A cikin wannan rukunin mun sami yawancin jinsuna kamar:
- AnkylosaurWadannan dinosaur din suna da girma kuma wani lokacin sukan kai tsawon mita 7 da tsayi kusan mita 2. Matsakaicin nauyin waɗannan nau'in ya kasance tan 4. Don kare kanta daga masu farautar ta, mutane sun rufe jikin ta ko kuma faranti waɗanda suke aiki a matsayin cuirass. Duk wannan bayanin an same shi ne saboda burbushin halittar da aka samo wanda a cikin sa akwai yuwuwar ganin cewa gabban gabban sun fi na baya baya. Kan nasa ya yi kama da alwatika, domin faɗinsa ya fi tsayi yawa.
- Hadrosaurs: Wadannan dinosaur din ana kiransu da suna duckbills. Hakanan suna da babban girma tsakanin kusan mita 4 zuwa 15. Suna iya samun adadi mai yawa don su sami damar niƙa ciyawa da kyau. A wasu lokuta, ana samun burbushin tare da muƙamuƙin hakora har zuwa 2000 da aka jera a jere, dukkansu sun kasance masu ɗanye. Wutsiyar ta daɗe sosai kuma ta yi sulhu. Babban manufar wannan jelar ita ce kiyaye daidaito lokacin da ake tafiya akan ƙafafu biyu don gujewa daga maharan.
- Pachycephalosaurs: Manyan dinosaur ne wadanda babban halayyar su ita ce samun kashi na kasusuwa wanda aka kwaikwaya kamar hular kwano. Babban aikinta shine na kariya. A wasu samfurin, kumburin zai iya kaiwa kaurin da ya kai santimita 25. Nau'in dinosaur mai kafa biyu kuma yana iya kaiwa tsayi har zuwa mita 5 da nauyin tan 2, kusan.
- Ceratopsids: wadannan dinosaur sun kasance quadrupeds. Suna da ƙaho a fuska. Hakanan sun sami faɗaɗa daga bayan kai wanda ya faɗaɗa zuwa wuya. Suna da tsawo har zuwa mita 8 kuma sun isa fursuna har zuwa tan 12.
Dabbobin dinosaur masu cin nama
Dabbobin masu cin nama sun haɗa da rukunin kayan masarufi. Su dinosaur masu cin nama suna da girma kuma suna wakiltar manyan dabbobi. Yawancinsu suna da girma cikin girma tare da haɓakar hannu da ƙarfi. Sun kasance bipeds kuma babban fasalin su shine suna da fuska biyu gaba da baya.
Daga wannan rukunin dinosaur mai cin nama yana iya zama sanannen sanannen Tyrannosaurus Rex.
Tashi mai rarrafe
Daga cikin dabbobi masu rarrafe mafi sani shine Pterosaurs. Kodayake mutane da yawa sun haɗa waɗannan dabbobin a cikin ƙungiyar dinosaur, ba haka lamarin yake ba. Waɗannan dabbobi sune farkon vertebrates waɗanda zasu iya mallakar ikon tashi. Girmansa zai iya kaiwa mita 12 na fukafukai.
Dabbobi masu rarrafe
Wani rukuni wanda ya haɓaka da yawa a cikin halittun ruwa na Cretaceous su ne dabbobi masu rarrafe. Yawanci suna da girma tsakanin mita 12 zuwa 17 a tsayi. Mafi sanannun sune masarauta da elasmosaurids. Elasmosaurids yana da wasu manyan halaye wanda a cikinsu ya tsaya don samun dogon wuya saboda yana da adadi mai yawa na kashin baya. Suna ciyarwa galibi akan kifi da mollusks.
A gefe guda kuma, masallacin dabbobi masu rarrafe ne waɗanda aka daidaita su da rayuwar ruwa. Suna da doguwar jela da fin a tsaye.
Ina fatan cewa tare da wannan bayanin zaku iya koyo game da fauna na Cretaceous.