Annelida Hanzhi Fang 100092540 Kaihao Yang 100098534 MuchuanSun 100100436
introduction • Classification of Annelida • Description • Ecological significance • Interaction with humans • Fossils
Classification of Annelida • Kingdom: Animalia • Superphylum: Lophtrochozoa • Phylum: Annelida
Description • Segmentation • Most of an annelid's body consists of segments that are practically identical, having the same sets of internal organs and hair. • reparation • Self repair • Reproduction • Sexual or without sexual
Ecological significance • Play an important role in the food chain. • It is an important part in the ecosystem.
Interaction with humans • Improve soil fertility and increases crop production • To be used for medical
Fossils • Very rare fossils, due to the fact that Annelidas are soft-bodies animals.
The small shell fossil Cloudina, from 549 to 542 million years ago, has been classified by some authors as an Annelide, but by others as a cnidarian (i.e. in the phylum to which jellyfish and sea anemones belong). • 2008---the earliest fossils widely accepted as annelids
Thank you • Hanzhi Fang 100092540 • Kaihao Yang 100098534 • Muchuan Sun 100100436
Sources • Rouse, G. (1998). "The Annelida and their close relatives". In Anderson, D.T.. Invertebrate Zoology. Oxford University Press. p. 202. ISBN 0-19-551368-1. • A group of worms classified by some as polychaetes and by others as clitellates, see Rouse & Fauchald (1997) "Cladistics and polychaetes“ • http://www.biodiversityexplorer.org/mm/annelids/index.htm • http://www.ucmp.berkeley.edu/annelida/annelidalh.html