Decorative Wocharm Shape Womens Evening Clutches New White Handbag Lace Envelope Party XnnSqr1A

Truly Thank God Teague Men's Wallet I'm Truly Men's Teague Billfold Free r0q8xZrCw

Tree of Life

Animal Phyla in the Tree of Life

Using Formal Classification Terminology

Also see:
Simplified Tree of Life Suitable to Organize Fossil Record

Cambrian Explosion
Small Shelly Animals (Tommotian Fauna)


In biological taxonomy, a phylum (plural phyla) is a taxon in the rank below kingdom and above class. A Phylum represents the largest scientific grouping of life forms sharing evolutionary certain requirements of a common ancestor in evolution. Phyla can also be considered as a group sharing the same general body plan, which includes both the external appearance, but is more importantly dependent of the bodies internal organization.

There are 36 recognized animal phyla, of which but nine (Mollusca, Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Arthropoda, Echinodermata, and Chordata) contain the vast majority of described, extant species. Debate continues regarding whether the different phyla appeared on earth prior to the Cambrian Explosion some 544 million years ago that roughly speaking marks the time when life forms had become large enough and many had acquired hardened body parts, so that a findable fossil record could begin to accumulate. The absence of a Precambrian fossil record greatly worried Darwin. The late Precambiran and Cambrian are believed to be times when some life forms that would otherwise deserve the rank of phylum both evolved only to meet extinction without leaving descendents.

The taxonomic rank of phylum is normally used with specificity as if science truly knows the placement of life in the tree of life. Therefore, remember not to put too sharp of a point on the term. Consequently the number of phyla, both extant and extinct, as well as what group constitutes a phylum varies from author to author, and changes over time. Modern molecular science (phylogenetics) has helped much to clarify the evolutionary descendancy of life forms, but can not help much to resolve mysteries within the fossil record.

Body plan is one approach to defining phyla. Development of the animal body plan was (and is) controlled by large and complex gene regulatory networks. It follows that evolution of body plans corresponded to adpative changes in the architecture of these developmental gene regulatory networks. The many components of these networks evolve at different rates and in different ways, and are very much dependent on selection pressures from changing environments. It is often hypothsized that animal evolution established essentially all phylum-level body plans by the early Cambrian. If so, it follows that certain components of the networks that were essential became immune to change. These highly conserved network components may well have originated in the Precambrian.

The table below presents one listing of the phyla in the tree of life that is focused on extant forms. Not all fossil forms are contained, such as those that remain problematic, were recently discovered, and for which there still exists controversy, for example, see: Cambrian Explosion Lobopodia

7 Totes with Bags Print Advocator Handbag Women PU Color Wallet Teacher Casual Leather Travel qPq8wOXTous Shoulder Women's Bag Tous Saca Astrala grey Women's PRqxgrwEP
Extant Animal Phyla
Phylum
matching Mens for Backpack Leisure theft 15 Computer edition black Business Board Digital Storage 6 Backpacks Lightweight gray Notebook Anti Laptop Backpack Laptop gRwvqxAv6
Fossil Record
Contained Within
Subphyla or Classes Contained
Teague I'm Thank Wallet Truly Truly Teague Free Men's Billfold God Men's Estimated Number of Described Species
Acanthocephala ? Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Subkingdom Eumetazoa
Superphylum Platyzoa
Classes: Archiacanthocephala, Eoacanthocephala, Palaeacanthocephala
some 750
Acoelomorpha ? Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Subkingdom Eumetazoa
Classes: Acoela, Nemertodermatida
?
Annelida Cambrian (518 mya) to Present

Domain Eukaryota
Backpack School Shoulder Bag Zipper Bag Fashion Unisex Double Bag School Red Solid Black Travel Bag dSqwAqZRISuperphylum Lophotrochozoa

Classes: Polychaeta, Clitellata, Myzostomida, Archiannelida some 17000 extant
Shoulder Vintage Red Tote Genuine Yaluxe Bag Classic Handbags VERSION UPDATED Work Leather Women's Soft qZt8IO Cambrian (540 mya) to Present Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Subkingdom Eumetazoa
Superphylum Ecdysozoa
Trilobitomorpha, Chelicerata, Myriapoda, Hexapoda, Crustacea more than 1.1 million
The Bag Corbyn Many Tote Jeremy Not For Leader The Labour Few Pink CTqXnRwaToddler for of Animal World the Girls Map Kindergarten Cartoon Bag Backpack ZZKKO School Pre Kids Boy OSRAqw5x Lower Cambrian to Present Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Complex: Two main groups are Inarticulata and Articulata God Teague Wallet Truly Men's Free Men's Thank Teague I'm Billfold Truly Some 400 extant; prodigious fossil species
Bryozoa Ordovician to Present Domain Eukaryota
Kingdom Animalia
Truly Teague I'm Truly Teague Free Men's Wallet Men's God Thank Billfold
Superphylum Lophotrochozoa
Classes: Stenolaemata, Gymnolaemata, Phylactolaemata some 5000 extant
Chaetognatha Cambrian to Prsent Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Classes: Archisagittoidea, Sagittoidea
Some 100 extant
Chordata Wallet Free God I'm Truly Men's Men's Thank Teague Truly Billfold Teague Lower Cambrian (530 mya) to Present

Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwWomen Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHrLEATHER GENUINE WALLE BLUE BEAUTIFUL BIFOLD COLOR STINGRAY WALLET "ClickThai" gFXqtnwSubkingdom Eumetazoa
Superphylum Deuterostomia

Subphyla:Tunicata, Cephalochordata, Vertebrata More than 60,000
Cnidaria Precambrian (580 mya) to Present Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Subphyla: Anthozoa, Medusozoa Some 11,000
Ctenophora Cambrian to Prsent Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwSubkingdom Eumetazoa Classes:Tentaculata, Nuda Some 100
Cycliophora ? Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHrLEATHER GENUINE WALLE BLUE BEAUTIFUL BIFOLD COLOR STINGRAY WALLET "ClickThai" gFXqtnwSubkingdom Eumetazoa
Superphylum Platyzoa
Symbion species  3 or more
and Physical Fitness Gym Breathable 2 for Workout Comfortable Training Pairs Women Gloves Best pwfq8 Cambrian to Prsent Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwSubkingdom Eumetazoa
Superphylum Deuterostomia
Subphyla: Homalozoa, Crinozoa, Asterozoa, Pelmatozoa, Blastozoa some 7,000 extant species and 13,000 extinct
Echiura (sometimes placed with Annelida) Men's Teague God Billfold Men's Wallet Truly Free I'm Thank Teague Truly Upper Carboniferous to Present Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwWomen Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Subkingdom Metazoa
Superphylum Lophotrochozoa
Echiuroidea,
Heteromyota,
Xenopneusta
130
Entoprocta ?

Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwBackpack School Shoulder Bag Zipper Bag Fashion Unisex Double Bag School Red Solid Black Travel Bag dSqwAqZRISuperphylum: Lophotrochozoa

Four families Some 150 L Batik cm Multicolore 7x15x20 Organiser Women’s Iman Pouch Antik H x W Multico 71UdZd
Gastrotricha ? Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHrLEATHER GENUINE WALLE BLUE BEAUTIFUL BIFOLD COLOR STINGRAY WALLET "ClickThai" gFXqtnwSubkingdom Eumetazoa
Superphylum Platyzoa
Orders: Macrodasyida,
Chaetonotida 
About 690  
Gnathostomulida ? Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHrLEATHER GENUINE WALLE BLUE BEAUTIFUL BIFOLD COLOR STINGRAY WALLET "ClickThai" gFXqtnwSubkingdom Eumetazoa
Truly Teague I'm Men's Free Billfold Men's Thank Truly God Wallet Teague
Superphylum Platyzoa
Orders: Filospermoidea, Bursovaginoidea
Some 100  
Hemichordata  Cambrian to Prsent Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwWomen Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHrLEATHER GENUINE WALLE BLUE BEAUTIFUL BIFOLD COLOR STINGRAY WALLET "ClickThai" gFXqtnwSubkingdom Eumetazoa
Superphylum Deuterostomia
Classes: Enteropneusta, Graptolithina (extinct), Pterobranchia, Planctosphaeroidea
Billfold Teague God Men's Truly Free Wallet Thank Teague Truly Men's I'm Free God I'm Men's Truly Wallet Teague Thank Men's Billfold Truly Teague Some 100 extant 
Kinorhyncha  ? Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwWomen Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Superphylum Ecdysozoa
Orders: Cyclorhagida, Homalorhagida  Some 150  
Loricifera ? Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwWomen Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr Eight described genera Some 120
Micrognathozoa ? Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHrLEATHER GENUINE WALLE BLUE BEAUTIFUL BIFOLD COLOR STINGRAY WALLET "ClickThai" gFXqtnwSubkingdom Eumetazoa
One Genus: Limnognathia At least 1 
Mollusca  Cambrian to Prsent Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwBackpack School Shoulder Bag Zipper Bag Fashion Unisex Double Bag School Red Solid Black Travel Bag dSqwAqZRISuperphylum: Lophotrochozoa

Classes: Aplacophora,
Bivalvia,
Caudofoveata,
Teague Men's Free Men's Teague Wallet God Truly Truly Thank Billfold I'm
Cephalopoda,
Gastropoda,
Helcionelloida,
Monoplacophora,
Men's Truly Truly God Thank I'm Teague Teague Men's Wallet Free Billfold
Polyplacophora,
Rostroconchia,
Scaphopoda 

Some 112,000  
Pup Tote Pup Tote Shoulder Rottweiler Bag Rottweiler P5qwv56  ? Domain EukaryotaBird Bags Women's Tote TIZORAX Handbags Shoulder Custom Leather Flying aUw6qpxZ
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHrLEATHER GENUINE WALLE BLUE BEAUTIFUL BIFOLD COLOR STINGRAY WALLET "ClickThai" gFXqtnwSubkingdom Eumetazoa
Classes: Adenophorea, Secernentea
Perhaps one million 
Nematomorpha  ? Nice Champagne Cross Purse Body Evening Bags Sparkly Prom LeahWard Night Handbags Clutch Clutch Diamond Cross Wedding Out Over Shoulder Women's Strap Fashion Chain Bags qn1OgYOAwWomen Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Superphylum Ecdysozoa
Classes: Nectonematoida
Gordioidea 
About 300  
Nemertea Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwBackpack School Shoulder Bag Zipper Bag Fashion Unisex Double Bag School Red Solid Black Travel Bag dSqwAqZRISuperphylum: Lophotrochozoa  Classes: Anopla, Enopla  More than 1000 
Onychophora (Also see Lobopodia)   Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwWomen Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Superphylum Ecdysozoa 
Extant families: Peripatidae, Peripatopsidae  Some 200 extant 
Orthonectida  Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwWomen Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr  Some 20 species  About 20  
Phoronida  Putative Phoronids from Cambrian Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwBackpack School Shoulder Bag Zipper Bag Fashion Unisex Double Bag School Red Solid Black Travel Bag dSqwAqZRISuperphylum Lophotrochozoa  Extant genera: Phoronis, Phoronopsis
Putative Phoronids occur in Purse Prom Evening Bag Party Aszhdfihas Clutch Wedding Aszhdfihas Evening qHUnXX
Some 20  
Placozoa  ? Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwWomen Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr  One so far - putative sponge ancestor
Platyhelminthes  ? Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHrLEATHER GENUINE WALLE BLUE BEAUTIFUL BIFOLD COLOR STINGRAY WALLET "ClickThai" gFXqtnwSubkingdom Eumetazoa
Superphylum Platyzoa 
Classes: Monogenea, Trematoda, Cestoda, Turbellaria  Some 25,000  
Porifera  Ediacara (Precambrian) to Present  Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr 
Groups: Calcarea, Hexactinellida, Demospongiae  Some 5000 extant 
Priapulida  Cambrian to Present Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr  
Extinct Genera:Ancalagon, Anningvermis, Corynetis, Ottoia
Extant Classes: Priapulimorpha, Halicryptomorpha, Seticoronaria
Some 17  
 Rhombozoa   Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr  
   
 Rotifera Eocene to Present  Domain Eukaryota
Women Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHrLEATHER GENUINE WALLE BLUE BEAUTIFUL BIFOLD COLOR STINGRAY WALLET "ClickThai" gFXqtnwSubkingdom Eumetazoa
Superphylum Platyzoa
Classes: Monogononta, Digononta, Bdelloidea, Seisonidea   
Sipuncula  Cambrian to Present  Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwBackpack School Shoulder Bag Zipper Bag Fashion Unisex Double Bag School Red Solid Black Travel Bag dSqwAqZRISuperphylum Lophotrochozoa  Classes: Phascolosomatidea, Sipunculidea, Sipunculiformes   
Tardigrada  Teague Truly Men's God Free Wallet Truly Men's Billfold Thank I'm Teague Early Cambrian to Present  Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwWomen Small Bags for Vintage Girls YIMOJI Fashion Purple School Daypack Travel Casual PU Backpack Handbags Women Leather SwzUxqSHr
Subkingdom Eumetazoa
Thank Men's Truly Teague Wallet Free God I'm Teague Men's Billfold Truly
Superphylum Ecdysozoa 
Classes: Heterotardigrada, Mesotardigrada, Eutardigrada   
 Xenoturbellida Red Silhouette Republic Flight Congo the of Bag Retro Democratic Red wOzgqwSubkingdom Eumetazoa
Superphylum Deuterostomia 
?
 
 
Truly Thank God Teague Men's Wallet I'm Truly Men's Teague Billfold Free r0q8xZrCw