A yammacin wata bazarar dubban shekaru da suka gabata, fitattun dabbobi biyu suna yawo a ƙasashen Jalisco, ɗaya don girmanta, gonfoterio; wani, saboda surar canines, saber haƙori. Dukansu sanannu ne sanadiyyar sake ginin kimiyya da burbushinsu, wanda ya bamu damar sanin ilimin halittar su.
Ba a sami dinosaur a ƙasashen Jalisco ba, amma ba a cire irin wannan binciken ba. A gefe guda kuma, a wannan bangare na kasar, wanda yake da yanayin dutsen aman wuta kuma ruwa ya rufe shi dubunnan shekaru, ragowar dabbobi masu shayarwa suna da yawa.
Injiniya Federico A. Solórzano, wanda ya sadaukar da rayuwarsa don nazarin burbushin halittu, ya zagaya mahallin, da farko a matsayin mai sonsu, sannan a matsayin dalibi, daga baya kuma a matsayin mai bincike da malami don gano ragowar burbushin na wannan yankin yammacin Mexico. Da yake ya tabbata cewa ba a amfani da ilmi don a ajiye shi, sai dai a raba shi, fitaccen mai binciken na kasar ta Mexico ya ba da rikon kayayyakin da aka tattara zuwa babban birnin Jalisco don nazari da nunawa. Partan ƙaramin ɓangaren wannan tarin ne kawai aka baje kolinsu a Guadalajara Museum of Paleontology, kamar yadda sauran masana ke ci gaba da nazarin su kuma suna jiran faɗaɗa shafin don a nuna wa jama'a.
Dangi tare da giwa
Raguwar matakin ruwa a Tafkin Chapala ya bayyana, a watan Afrilu na 2000, kasusuwan babbar dabba mai ban mamaki: gomphoteric, na wurare masu zafi ko kuma halittu masu rarrafe.
Saukarwar tana da mahimmanci saboda mafi yawan lokuta wani ko wani ƙashi yana nan, yayin da a wannan lokacin aka samu kusan kashi 90% na ƙashin. Ba da daɗewa ba aka cire shi daga wurin don sake dubawa, kuma bayan tafiyar hawainiya, masu binciken sun sake haɗa shi kuma a yau ya mamaye ɗayan manyan wuraren wannan gidan kayan gargajiya a Guadalajara. Dangane da sassan ana iya sanin cewa namiji ne, wanda shekarun sa sama da shekaru 50.
Wannan babbar dabbar tana zaune a Arewacin Amurka yayin manyan makarantu da Quaternary. An kiyasta cewa zai iya yin nauyi har tan huɗu. Manyan karninta na sama biyu - madaidaiciya kuma ba tare da rukunin enamel ba - ana kuskuren fahimtarsu kamar hauka; Suna faruwa a cikin maxilla kuma wani lokacin a cikin maɗaukaki. Tsarin kwancen gonfoterio yayi girma kamar na giwayen yanzu. Sananne ne cewa tsawon rayuwar sa yayi kama da na mutane kuma yana iya kaiwa shekaru 70 a kan matsakaita. Ya kasance ciyawar herbivore ce wacce ke da kyawawan kayan gogewa don yankewa da murƙushe rassa, ganye da tushe.
Singular feline
A cikin 2006 sabon mazaunin ya zo wannan gidan kayan gargajiya, haifuwa na saber damisa. An sani cewa wannan babban sojan ya kasance mai yawa a mazaunin Zacoalco, Jalisco. Haƙiƙa ta mamaye dukkanin nahiyar yayin zamanin Pleistocene.
Wakilan farko na jinsin sun dawo shekaru miliyan 2.5 kuma na ƙarshe sun wanzu shekaru 10,000 da suka gabata; a ƙarshen shekarun kankara na ƙarshe. Ba a yi amfani da haƙoranta na canine (masu lankwasa da ci gaba ba) don kashe abin farautar, amma don yanke shi ta ciki da kuma iya cin gashinta. Matsayin buɗewar muƙamuƙinsu ya kai digiri 90 da 95, yayin da na kuliyoyin yanzu ke tsakanin 65 zuwa 70 digiri. Tana da nauyin kilogram 400 kuma saboda girmanta ya ɗan fi na zakuna ayau. Tare da kakkarfan wuya, mai taurin baya da karami, yana da gajerun gaɓoɓi, saboda haka ana ɗauka cewa bai dace da neman ba, amma ƙwarewa ne ga kwanton-bauna.
Akwai nau'ikan nau'ikan damisa guda uku: Smilodon gracilis, waɗanda ke zaune a yankunan Amurka; Mawallafin Smilodon, a Kudancin Amurka, da Smilodon fatalis, waɗanda ke zaune a yammacin Amurka. Haihuwar da yanzu za a iya gani a cikin Guadalajara na karshen ne.
Bugu da kari, wannan gidan kayan tarihin yana da sauran abubuwan jan hankali na ilimi kamar bitoci da yawon bude ido don fahimtar yanayin da ya wanzu miliyoyin shekaru da suka gabata a wannan yanki na ƙasar.
Source: Ba a san Mexico ba No. 369 / Nuwamba 2007.
