
akkest (trilobite)

silurian kaalaghattatthiludaneelam (venlock group) jeevichirunna phacopida oordaril vamshanasham sambhavicha trilobitinte oru janussaanu akaast. niravadhi enangal ulppeduthiyittundile, ippol ithinu oru inam maathrameyulloo, "akaast dauningiya."oru convex dorsal uparithalam, nattellukalude abhavam, head-sheeldinte hraswata, ellah konukaludeyum pothuvaaya vritham ennivayaanu ithinte savisheshatha. 
vargeekaranam.
munbu "akaast" ennu niyogikkappetta enangal.
akkest" ennu aadyam nischayichirunna chila enangale ippol mattu janussukalilekku punarniyamichirikkunnu.

