
zenacanthus

zenacanthus (pracheen yunani seey φένος, xénos, 'videshi, videshi' + άκανθος, acanthos, 'reedh') pragaitihasik zenacanth kaa ack vansh haye. duniya bhar mein vibhinn prajaatiyon key jeevaashm paae gaye hain.
varnan.
"zenacanthus" mein kaee visheshtaen theen joe ise aadhunik shark seey alag karati theen. yeh meethe paani kii shark aamtaur parr lagbhag ack meater (3.3 feat) lambi hoti thee, aur kabhi bhee usase adhik lambi naheen hoti thee. prishthiya pankh ribbon jaisa thaa aur peechhe kii poori lambai aur poonchh koo goal kartaa thaa, jahaan yeh gudaa pankh key saath juda jaataa thaa. yeh vyavastha aadhunik conger eals seey milati-julati haye, aur "zenacanthus" shayed isi tarah tairta haye. sir key peechhe seey ack vishisht reedh kii huddy prakshepit kii gaee aur genus koo iska naam diyaa gayaa. spike key vishaakt honey kaa bhee anuman lagaaya gayaa haye, shayed ack sting ray key samaan tareeke seey. yeh kaafee prashansaniya haye kyonki kiranen shark key nikat sambandh rakhti hain. daanton kaa aakar asamanya "vee" thaa, aur yeh shayed chhote crustatian aur bhaari paimaane parr scale kii gaee pelioniskid machhliyon koo khilaata thaa.
sabhi jeevaashm sharkon kii tarah, "zenacanthus" mukhya roop seey jeevaashm daanton aur reedh kii huddy key kaaran jaanaa jaataa haye.
jeevaashm uttari america, europe aur dakshin america key carboniferous-shukranuon seey gyaat hain. tricic prajaatiyon koo alag genus "mooredonts" mein sthanantarit curr diyaa gayaa haye.

