Dichotomous Key/Animalia
From Wikibooks, the open-content textbooks collection
< Dichotomous Key(Redirected from Dichotomous Key:Animalia)
| Dichotomous Key: Animalia | |
|---|---|
|
[edit] 2
- Symmetry
- Radial or pentamerism - #4: Radiata or Echinodermata
- Bilateral - #5: Bilateria
[edit] 3: Parazoa or Agnotozoa
[edit] 4: Radiata or Echinodermata
- Bilateral larvae, water vascular system
- Present - Echinodermata
- Not present - #21: Radiata
[edit] 5: Bilateria
- First body opening to develop
- Mouth - #6: Protostomes
- Anus - #19: Deuterostomes
[edit] 6: Protostomes
- Trochophore larvae
- Yes - #8: Trochozoa
- No - #7
[edit] 7
- Presence of a lophophore
- Yes - #17: Lophophorate
- No - #12
[edit] 8: Trochozoa
[edit] 9
[edit] 10
[edit] 11
- Adults secrete chitinous tubes in which to live
- Yes - Phoronidae
- No - Bryozoa
[edit] 12
- Ecdysis
- Yes - #13: Ecdysozoa
- No - #18
[edit] 13: Ecdysozoa
- Segmentation
- Yes - #14: Panarthropoda
- No - #16
[edit] 14: Panarthropoda
- Jointed legs
- Yes - Arthropoda
- No - #15
[edit] 15
- Four body segments and a head
- Yes - Tardigrade
- No, one segmented and a three-segmented head - Onychophora
[edit] 16
- Presence of skeleton-like scales at each end, used for movement
- Yes - Loricifera
- No - #22
[edit] 17: Lophophorate
- Presence of two shells
- Yes - Brachiopoda
- No - #11
[edit] 18
- Presence of coelum
- Pseudocoelomate - #25: Gnathifera
- Acoelomate - #24
[edit] 19: Deuterostomes
[edit] 20
- Radial symmetry present at some point in the life cycle
- Yes - Echinodermata
- No - Chaetognatha
[edit] 21: Radiata
- Presence of cnidocytes
- Yes - Cnidaria
- No - Ctenophora
[edit] 22
- Presence of spines around head
- Yes - Kinorhyncha
- No - #23
[edit] 23
- Presence of spines on proboscis
- Yes - Priapulida
- No - could be Nematoda or Nematomorpha
[edit] 24
- Presence of two adhesive tubes
- Yes - Gastrotricha
- No - Platyhelminthes
[edit] 25: Gnathifera
- Presence of an evertable proboscis
- Yes - Acanthocephala
- No - #26
[edit] 26
Could be Rotifera, Gnathostoma or Limnognathia
| Glossary for this page (all links are to Wikipedia articles) |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|

