Kuze kube manje, isayensi yethu yanamuhla ivame ukwamukela ukuthi i- "proboscis - into ende, efana nolimi esetshenziswa amabhu anamuhla nezimvemvane" ukufinyelela umpe ngaphakathi kwamashubhu ezimbali, empeleni yavela ngemuva kokusungulwa kwezimbali ukusizakala ngalokhu ku-mint isimo inala yokudla. Kepha okutholakele kwakamuva kwe-palaeontological kodwa kukhomba kwenye inkolelo-mbono engabazisayo.
Ucwaningo oluyinqaba lwama-fossil cores aqhamuka ngasekupheleni kukaTriassic nasekuqaleni kweJurassic luholwa yithimba labaphenyi bamazwe aphesheya eJalimane; lapho, bahlangabezana nezinhlobo ze-weeny zesikali zamathambo ezifosiwe ezitholakala ku-butterflies namabhu.
Kamuva, ukuhlaziywa okuqhubekayo kuveze ukuthi lezi zimvemvane ezaziseminyakeni eyizigidi ezingama-200 ubudala nazo zazine-proboscis, yize izimbali zazingeke zibe khona eminye iminyaka eyizigidi ezingama-70.
Yize kungaphakanyiswa ukuthi i-proboscis ibingabasiza ekuqedeni amathonsi okushukela e-pollination ama-gymnosperms (uhlobo lwesitshalo olwaluvame kakhulu ngesikhathi okusolwa ngaso), kubonakala sengathi imibono yamanje yokuvela kwalezi zinambuzane ibonakala ingekho yanele ngokwanele.
