Biology:Taxonomy of invertebrates (Brusca & Brusca, 2003)

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Short description: System of classification of animals with emphasis on the invertebrates


The biological systematics and taxonomy of invertebrates as proposed by Richard C. Brusca and Gary J. Brusca in 2003 is a system of classification of invertebrates, as a way to classify animals without backbones.[1]

Prokaryotes

  • Kingdom Eubacteria, also known as Bacteria – Domain of microorganisms
  • Kingdom Biology:Archaea, also known as Archaebacteria – Domain of single-celled organisms

Eukaryotes (Eukaryota, or Eukarya)

  • Kingdom Fungi – Biological kingdom, separate from plants and animals
  • Kingdom Plantae – Kingdom of photosynthetic eukaryotes (= Metaphyta)
  • Kingdom Protista – Eukaryotes other than animals, plants or fungi
  • Phylum Stramenopila – Infrakingdom of protist eukaryotes
  • Phylum Rhizopoda – Polyphyletic group of unicellular eukaryotes with the ability to shapeshift
  • Phylum Actinopoda – Polyphyletic group of unicellular eukaryotes with the ability to shapeshift
  • Phylum Granuloreticulosa – Phylum of amoeboid protists
  • Phylum Biology:Microspora – Taxon of autotrophic fungus-like protists
  • Phylum Ascetospora – A group of eukaryotes that are parasites of animals
  • Phylum Choanoflagellata – Group of eukaryotes considered the closest living relatives of animals
  • Phylum Biology:Chlorophyta – Phylum of green algae
  • Phylum Opalinida – Small group of peculiar heterokonts, family Opalinidae, order Slopalinida
  • Incertae sedis: Genus Stephanopogon – Genus of flagellate marine protozoan

Kingdom Animalia (Metazoa)

Parazoa

Phylum Porifera
  • Class Hexactinellida
  • Class Demospongiae

Mesozoa

Phylum Placozoa
Phylum Monoblastozoa
Phylum Rhombozoa
  • Phylum Rhombozoa
Phylum Orthonectida

Eumetazoa

Radiata
Phylum Cnidaria
  • Order Hydroida
  • Suborder Anthomedusae (= Gymnoblastea or Athecata)
  • Suborder Leptomedusae (= Calyptoblastea or Thecata)
  • Subclass Ceriantipatharia
Phylum Ctenophora
Bilateria

The authors divide the bilaterians in three informal groups:

  • acoelomates (phyla Platyhelminthes, Gastrotricha, Entoprocta, Gnathostomulida, Cycliophora)
  • blastocoelomate (or pseducoelomate, phyla Rotifera, Kinorhyncha, Nematoda, Nematomorpha, Acanthocephala, Loricifera)
  • coelomates (or eucoelomates, phyla Nemertea, Priapula, Annelida, Sipuncula, Echiura, Onychophora, Tardigrada, Arthropoda, Mollusca, Phoronida, Ectoprocta, Brachiopoda, Echinodermata, Chaetognatha, Hemichordata, Chordata).

Several groups traditionally viewed as having a blastocoelomate condition are viewed here as acoelomates (e.g., Gastrotricha, Entoprocta, Gnathostomulida).

Some of the coelomates groups (e.g., Arthropoda, Mollusca) have greatly reduced celomic spaces; often the main body cavity is a bloodfilled space called a hemocoel, and is associated with an open circulatory system.

The Brachiopoda, Ectoprocta and Phoronida are viewed as lophophorates.

In a phylogeny,[3] the bilaterians are divided in:

  • Protostomia
  • Deuterostomia
Phylum Platyhelminthes
Phylum Nemertea
Phylum Rotifera
  • Class Digonata
Phylum Gastrotricha
Phylum Kinorhyncha
Phylum Nematoda (= Nemata)
  • Subclass Enoplia
  • Subclass Chromadoria
Phylum Nematomorpha
Phylum Priapula
  • Phylum Priapula
Phylum Acanthocephala
Phylum Entoprocta (= Kamptozoa)
Phylum Gnathostomulida
Phylum Loricifera
Phylum Cycliophora
Phylum Annelida
  • Class Polychaeta, with 25 orders and 87 families (not all are listed)
  • Order Lumbriculida
  • Order Haplotaxida, with 25 families (not all are listed)
  • Subclass Hirudinoidea
Phylum Sipuncula
  • Class Phascolosomida
  • Class Sipunculida
  • Order Golfingiaformes
Phylum Echiura
  • Order Echiuroinea
  • Order Xenopneusta
  • Order Heteromyota
Phylum Onychophora
  • Family Peripatidae
  • Family Peripatopsidae
Phylum Tardigrada
Phylum Arthropoda
  • Order Lepstostraca
  • Superorder Acrothoracica
  • Superorder Rhizocephala
  • Superorder Thoracica
  • Infraclass Progymnoplea
  • Order Platycopioida
  • Infraclass Neocopepoda
  • Subphylum Myriapoda
  • Subclass Chilognatha
  • Subclass Notostigmophora
  • Subclass Pleurostigmophora
  • Subphylum Cheliceriformes
  • Superfamily Mygalomorpha
Phylum Mollusca
  • Class Bivalvia (=Pelecypoda, or Lamellibranchiata)
  • Order Nuculida (= Palaeotaxodonta)
  • Order Solemyida (= Cryptodonta)
  • Subclass Lamellibranchia
  • Superorder Filibranchia (= Pteriomorpha)
  • Superorder Eulamellibranchia (= Heterodonta)
  • Order Sepioida
  • Order Teuthoida (= Decapoda)
  • Order Octopoda
  • Order Vampyromorpha
Phylum Phoronida
Phylum Ectoprocta (= Bryozoa)
Phylum Brachiopoda
Phylum Echinodermata
  • ”Sea daisies” (previously the class Concentricycloidea, but assigned by many authorities to the Spinulosida)
  • Class Ophiuroidea
  • Class Echinoidea
  • Subclass Aspidochirotacea
  • Subclass Apodacea
Phylum Chaetognatha
Phylum Hemichordata
Phylum Chordata
  • Subphylum Urochordata (= Tunicata)

See also

References

  1. Richard C. Brusca & Gary J. Brusca (2003). Invertebrates (2nd ed.). Sunderland, Massachusetts: Sinauer Associates. ISBN:978-0-87893-097-5.
  2. Brusca, R. C.; Brusca, G. J. (2005). Invertebrados (2nd ed.). Madrid: McGraw-Hill-Interamericana. ISBN 978-0-87893-097-5. 
  3. Richard C. Brusca & Gary J. Brusca (2003), p. 875.