Animalia
by Muhammad Alif Danial
1. Arthropoda
1.1. Segmented bodies and jointed limbs, with Chitin exoskeleton
1.2. insects
1.3. crustaceans
1.4. arachnids
1.5. centipedes
1.6. millipedes
2. Brachiopoda
2.1. Lophophore and pedicle
3. Bryozoa
3.1. Lophophore, no pedicle, ciliated tentacles, anus outside ring of cilia
4. Chordata
4.1. Hollow dorsal nerve cord, notochord, pharyngeal slits, endostyle, post-anal tail
5. Ctenophora
5.1. Eight "comb rows" of fused cilia
6. Echinodermata
6.1. Fivefold radial symmetry in living forms, mesodermal calcified spines
7. Gastrotricha
7.1. Two terminal adhesive tubes
8. Hemichordata
8.1. Stomochord in collar, pharyngeal slits
9. Loricifera
9.1. Umbrella-like scales at each end
10. Mollusca
10.1. Muscular foot and mantle round shell
11. Nematomorpha
12. Onychophora
12.1. Legs tipped by chitinous claws
13. Placozoa
13.1. Differentiated top and bottom surfaces, two ciliated cell layers, amoeboid fiber cells in between
14. Platyhelminthes
15. Priapulida
16. Rotifera
16.1. Anterior crown of cilia
17. Tardigrada
17.1. Four segmented body and head
18. Acanthocephala
18.1. Reversible spiny proboscis that bears many rows of hooked spines
18.2. Archiacanthocephala
18.3. Eoacanthocephala
18.4. Palaeacanthocephala
19. Annelida
19.1. Multiple circular segment
20. Chaetognatha
20.1. Chitinous spines either side of head, fins
21. Cnidaria
21.1. Nematocysts (stinging cells)
22. Cycliophora
22.1. Circular mouth surrounded by small cilia, sac-like bodies
23. Entoprocta
23.1. Anus inside ring of cilia
24. Gnathostomulida
25. Kinorhyncha
25.1. Eleven segments, each with a dorsal plate
26. Micrognathozoa
26.1. Accordion-like extensible thorax
27. Nematoda
27.1. Round cross section, keratin cuticle
28. Nemertea
29. Orthonectida
29.1. Single layer of ciliated cells surrounding a mass of sex cells
30. Phoronida
30.1. U-shaped gut
31. Porifera
31.1. Perforated interior wall
32. Rhombozoa
32.1. Single anteroposterior axial cell surrounded by ciliated cells
33. Sipuncula
33.1. Mouth surrounded by invertible tentacles
34. Xenacoelomorpha
34.1. Bilaterian, but lacking typical bilaterian structures such as gut cavities, anuses, and circulatory systems
