Tree of marine life · Kingdom
Animalia · Kingdom
4,038 species · 346 recorded on this coast
This is the WoRMS classification (World Register of Marine Species) of the species in the guide: phylum, class, order, family and genus. That list is not an evolutionary tree; the cladogram after the list of phyla does show how they are related.
Showing the whole Peruvian register.Only those recorded on the coast where ORKA dives
What you see most
The groups with the most species recorded on the coast where ORKA dives.
- TeleosteiClass · 936 species · 111 recorded on this coast
- GastropodsGastropodaClass · 679 species · 66 recorded on this coast
- BivalvesBivalviaClass · 431 species · 58 recorded on this coast
- ReptiliaSuperclass · 88 species · 37 recorded on this coast
- MammalsMammaliaClass · 33 species · 14 recorded on this coast
- ElasmobranchiiClass · 116 species · 13 recorded on this coast
- MalacostracaClass · 592 species · 12 recorded on this coast
- PolychaetesPolychaetaClass · 21 species · 8 recorded on this coast
The 19 phyla
- ChordataPhylum · 1,205 species · 175 recorded on this coast
- MolluscsMolluscaPhylum · 1,190 species · 127 recorded on this coast
- ArthropodsArthropodaPhylum · 859 species · 18 recorded on this coast
- AnnelidsAnnelidaPhylum · 30 species · 8 recorded on this coast
- CnidariansCnidariaPhylum · 164 species · 7 recorded on this coast
- SpongesPoriferaPhylum · 64 species · 6 recorded on this coast
- EchinodermsEchinodermataPhylum · 204 species · 5 recorded on this coast
- Spiny-headed wormsAcanthocephalaPhylum · 6 species
- BrachiopodsBrachiopodaPhylum · 4 species
- BryozoansBryozoaPhylum · 24 species
- Arrow wormsChaetognathaPhylum · 15 species
- Comb jelliesCtenophoraPhylum · 7 species
- EntoproctsEntoproctaPhylum · 1 species
- HemichordatesHemichordataPhylum · 1 species
- NematodesNematodaPhylum · 32 species
- Ribbon wormsNemerteaPhylum · 8 species
- Horseshoe wormsPhoronidaPhylum · 1 species
- FlatwormsPlatyhelminthesPhylum · 221 species
- Water bearsTardigradaPhylum · 2 species
How the phyla are related
How the major groups are related, according to the Open Tree of Life (synthesis opentree16.1, 9 studies). Where the studies disagree, the relationship is drawn unresolved.
How to read it: each branch joins the groups most closely related to each other. When three or more branches leave the same point, with a dashed line, it means unresolved relationship: the studies do not agree on the order in which they split.
- Metazoa — all animals: many-celled living things that feed on other organismsInside, the relationship between its 4 branches is unresolved.
- Comb jellies · Ctenophora
- Sponges · Porifera
- Cnidarians · Cnidaria
- Bilateria — animals with bilateral symmetry: a left side and a right side that mirror each otherSupported by 2 studies; none contradicts it.Inside, the relationship between its 3 branches is unresolved.
- Chordata
- Ambulacraria — echinoderms and hemichordates, more closely related to each other than to the chordatesSupported by 3 studies; none contradicts it.
- Protostomia — animals whose embryo forms the mouth first: the great majority of the invertebratesSupported by 4 studies; none contradicts it.Inside, the relationship between its 3 branches is unresolved.
- Lophotrochozoa — molluscs, annelids and animals with a lophophore (a crown of tentacles for filtering), such as brachiopods and bryozoansSupported by 2 studies; none contradicts it.Inside, the relationship between its 4 branches is unresolved.
- Flatworms · Platyhelminthes
- Spiny-headed worms · Acanthocephala
- Group without a name of its ownSupported by 2 studies; none contradicts it.
- Group without a name of its ownSupported by 5 studies; none contradicts it.Inside, the relationship between its 4 branches is unresolved.
- Molluscs · Mollusca
- Annelids · Annelida
- Ribbon worms · Nemertea
- Grouped by a change from Open Tree. Read the note on the change
- Arrow worms · Chaetognatha
- Ecdysozoa — animals that moult their outer covering in order to grow: arthropods, nematodes, tardigrades…Supported by 3 studies; none contradicts it.
- Panarthropoda — arthropods and tardigrades: animals with legs that grow by moultingSupported by 2 studies; none contradicts it.
- Nematodes · Nematoda
One change from Open Tree
- Phoronida is shown as a phylum of its own, beside Brachiopoda, following WoRMS. Open Tree's taxonomy places it inside Brachiopoda, so its position was not queried separately.
Which groupings of the synthesis are drawn unresolved (8)
Open Tree always returns a tree that branches in twos. Here a grouping is drawn only if at least 2 studies support it and no study contradicts it; these do not pass that rule:
- all except comb jellies — at least one study contradicts it.
- all except comb jellies and sponges — at least one study contradicts it.
- Deuterostomia: Chordata, echinoderms and hemichordates — at least one study contradicts it.
- spiny-headed worms, annelids, brachiopods, bryozoans, arrow worms, entoprocts, molluscs, ribbon worms and flatworms — at least one study contradicts it.
- spiny-headed worms, bryozoans, entoprocts and flatworms — at least one study contradicts it.
- spiny-headed worms and flatworms — supported by fewer than 2 studies.
- brachiopods, molluscs and ribbon worms — at least one study contradicts it.
- brachiopods and ribbon worms — at least one study contradicts it.
Based on the Open Tree of Life (CC0 1.0, synthesis opentree16.1, taxonomy ott3.7draft3), with 1 change noted.