Hewan: Perbedaan antara revisi

Tabel berikut mencantumkan perkiraan jumlah spesies yang ada yang masih ada untuk kelompok-kelompok hewan dengan jumlah spesies terbesar,<ref name="Zhang2013">{{cite journal | last=Zhang | first=Zhi-Qiang | title=Animal biodiversity: An update of classification and diversity in 2013. In: Zhang, Z.-Q. (Ed.) Animal Biodiversity: An Outline of Higher-level Classification and Survey of Taxonomic Richness (Addenda 2013) | journal=Zootaxa | volume=3703 | issue=1 | date=2013-08-30 | doi=10.11646/zootaxa.3703.1.3 | url=https://biotaxa.org/Zootaxa/article/download/zootaxa.3703.1.3/4273 | page=5 | access-date=2018-03-15 | archive-date=2019-04-24 | archive-url=https://web.archive.org/web/20190424154926/https://biotaxa.org/Zootaxa/article/download/zootaxa.3703.1.3/4273 | dead-url=yes }}</ref> dengan habitat utama mereka (darat, air tawar,<ref name=Balian2008>{{cite book|last1=Balian |first1=E.V. |last2=Lévêque |first2=C. |last3=Segers|first3=H.|first4=K. |last4=Martens |title=Freshwater Animal Diversity Assessment |url=https://books.google.com/books?id=Dw4H6DBHnAgC&pg=PA628 |year=2008 |publisher=Springer |isbn=978-1-4020-8259-7 |page=628}}</ref> dan laut),<ref name="Hogenboom2016">{{cite web|last1=Hogenboom|first1=Melissa|title=There are only 35 kinds of animal and most are really weird|url=http://www.bbc.co.uk/earth/story/20150325-all-animal-life-in-35-photos|publisher=BBC earth|access-date=2018-03-15|archive-date=2018-08-10|archive-url=https://web.archive.org/web/20180810141811/http://www.bbc.co.uk/earth/story/20150325-all-animal-life-in-35-photos|dead-url=no}}</ref> dan cara hidup bebas atau parasit.<ref name=Poulin2007>{{cite book | last=Poulin | first=Robert |authorlink=Robert Poulin (zoologis) | title=Evolutionary Ecology of Parasites | url=https://archive.org/details/evolutionaryecol0000poul | publisher=Princeton University Press | year=2007 | isbn=978-0-691-12085-0 |page=[https://archive.org/details/evolutionaryecol0000poul/page/6 6]}}</ref> Perkiraan spesies yang ditunjukkan di sini didasarkan pada angka yang dideskripsikan secara ilmiah; perkiraan yang jauh lebih besar telah dihitung berdasarkan berbagai cara prediksi, dan ini bisa sangat bervariasi. Misalnya, sekitar 25.000–27.000 spesies nematoda telah dideskripsikan, sementara perkiraan jumlah nematoda yang dipublikasikan mencakup 10.000–20.000; 500.000; 10 juta; dan 100 juta.<ref name=Felder2009>{{cite book |last1=Felder |first1=Darryl L. |last2=Camp |first2=David K. |title=Gulf of Mexico Origin, Waters, and Biota: Biodiversity |url=https://books.google.com/books?id=CphA8hiwaFIC&pg=RA1-PA1111 |year=2009 |publisher=Texas A&M University Press |isbn=978-1-60344-269-5 |page=1111}}</ref> Dengan menggunakan pola dalam hierarki [[taksonomi]], jumlah spesies hewan—termasuk yang belum dideskripsikan—dihitung menjadi sekitar 7,77 juta pada tahun 2011.<ref>{{cite web |title=How many species on Earth? About 8.7 million, new estimate says |url=https://www.sciencedaily.com/releases/2011/08/110823180459.htm |accessdate=2 March 2018 |date=24 August 2011 |archive-date=2018-07-01 |archive-url=https://web.archive.org/web/20180701164954/https://www.sciencedaily.com/releases/2011/08/110823180459.htm |dead-url=no }}</ref><ref name="Mora2011">{{cite journal | last=Mora | first=Camilo | last2=Tittensor | first2=Derek P. | last3=Adl | first3=Sina | last4=Simpson | first4=Alastair G. B. | last5=Worm | first5=Boris | editor-last=Mace | editor-first=Georgina M. | title=How Many Species Are There on Earth and in the Ocean? | journal=PLoS Biology | volume=9 | issue=8 | date=2011-08-23 | doi=10.1371/journal.pbio.1001127 | page=e1001127 | pmid=21886479 | pmc=3160336}}</ref>{{efn|Aplikasi [[kode batang DNA]] pada taksonomi semakin memperrumit hal ini; sebuah analisis kode batang DNA pada 2016 memperkirakan bahwa terdapat 100.000 spesies [[serangga]] di [[Kanada]] saja, dan mengekstrapolasikan bahwa fauna serangga global seharusnya lebih dari 10 juta spesies, hampir 2 juta di dalam satu famili lalat yang disebut ''gall midge'' ([[Cecidomyiidae]]).<ref>{{cite journal |last1=Hebert |first1=Paul D. N. |last2=Ratnasingham |first2=Sujeevan |last3=Zakharov |first3=Evgeny V. |last4=Telfer |first4=Angela C. |last5=Levesque-Beaudin |first5=Valerie |last6=Milton |first6=Megan A. |last7=Pedersen |first7=Stephanie |last8=Jannetta |first8=Paul |last9=deWaard |first9=Jeremy R. |title=Counting animal species with DNA barcodes: Canadian insects |journal=Philosophical Transactions of the Royal Society B: Biological Sciences |date=1 August 2016 |volume=371 |issue=1702 |pages=20150333 |doi=10.1098/rstb.2015.0333 |pmid=27481785 |url=http://rstb.royalsocietypublishing.org/content/371/1702/20150333.long |pmc=4971185 |access-date=2018-05-04 |archive-date=2018-04-29 |archive-url=https://web.archive.org/web/20180429155232/http://rstb.royalsocietypublishing.org/content/371/1702/20150333.long |dead-url=no }}</ref>}}