Dichotomous Key/Mollusca
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1
[edit | edit source]| Animalia keys |
| Subkingdom |
|---|
| Agnotozoa |
| Phyla |
| Acoelomorpha | Cnidaria | Ctenophora | Myxozoa | Orthonectida | Placozoa | Porifera | Rhombozoa |
| Superphylum:Deuterostomia |
| Chaetognatha | Chordata | Echinodermata | Hemichordata |
| Superphylum:Ecdysozoa |
| Arthropoda | Kinorhyncha | Loricifera | Nematoda | Nematomorpha | Onychophora | Priapulida | Tardigrada |
| Superphylum:Lophotrochozoa |
| Annelida | Brachiopoda | Ectoprocta | Entoprocta | Mollusca | Nemertea | Phoronida | Sipuncula |
| Superphylum:Platyzoa |
| Acanthocephala | Cycliophora | Gastrotricha | Gnathostomulida | Micrognathozoa | Platyhelminthes | Rotifera |
- Presence of a foot or derived organ
- Yes - 2
- No - Aplacophora (subclass Chaetodermomorpha)
2
[edit | edit source]- Torsion
- Present - Gastropoda
- Not present - 3
3
[edit | edit source]- Presence of chromatophores - Can the animal change color?
- Yes - Cephalopoda
- No - 4
4
[edit | edit source]- Shell divided into plates
- Yes - Polyplacophora
- No - 5
5
[edit | edit source]- Segmentation
- Yes, primitive - Monoplacophora
- No - 6
| Mollusca keys |
| Classes |
|---|
| Aplacophora | Bivalvia | Caudofoveata | Cephalopoda | Gastropoda | Monoplacophora | Polyplacophora | Scaphopoda |
6
[edit | edit source]- Presence of captacula
- Yes - Scaphopoda
- No - 7
7
[edit | edit source]- Shell
- Two parts - Bivalvia
- One part - Aplacophora