BIO 203

Classification of Riftia pachyptila


The only meaning of Riftia pachyptila that I could find was "thick and feathery" which would be because of its red plume.









               Species-Riftia pachyptila



Break down of classification.

Eukarya-All eurkaryotic organisms contain a true nucleus.. There is a broad range of eukarya from large animals like the moose (Alces alces) to the smaller like damselflies (Zygoptera) and the common water flea (Daphnia pulex).


Animalia-Members of the kingdom animalia are multicellular and heterotrophic. This consists of most of the animals we learn early on in school. Like in infamous great white shark (Carcharodon carcharias).


Annelida-The annelids are characterised by segmented bodies. Like the common earth worm (Eisenia fetida). This group can look a lot like Platyhelminthes or Nematodes however they should not be confused. Here is a good example of a Platyhelminthes the Tiger Flat worm (Maritigrella crozieri) and here a super nasty Nematode for your enjoyment Trichinella spiralis.


Polychaeta-Members of polychaeta are characterized by having parapodia or fleshy protrusions and chaeta. The name polychaeta literally means "many chaeta". Chaeta are bristles made of chitin. This should not be cofused with animals that seem to have many bristles like the magnificent anemone (Heteractis).


Canalipalpata-These organisms are generally filter feeders and are characterised by having cilia. However for Riftia pachyptila and all others in the Siboglinidae family they have lost their cilia in adult form.


Siboglinidae-Common characterisitcs of the siboglinidae group is that they are usually fixed to a substrate (marine) and form colonies. Also this group is classified by its use of a chitinous tube for support.



This phylogenic tree is of the animal kingdom, Riftia pachyptila is classified under annelida. Under this classification we can also see that Riftia pachyptila has a coelom, is a protosome and has Bilateral symmetry.



This phylogenic tree shows Riftia pachyptila and the type of endosymbiont it uses.