As of August 2023, the IUCN Red List of Threatened Species identified 8509 data deficient species in the Chordata phylum (Animalia kingdom).

Actinopterygii

Anguilliformes

Anguillidae

Chlopsidae

Colocongridae

Heterenchelyidae

Monognathidae

  • Monognathus ahlstromi
  • Monognathus berteli
  • Monognathus boehlkei
  • Monognathus bruuni
  • Monognathus herringi
  • Monognathus isaacsi
  • Monognathus jesperseni
  • Monognathus jesse
  • Monognathus nigeli
  • Monognathus ozawai
  • Monognathus rajui
  • Monognathus smithi
  • Monognathus taningi

Moringuidae

Muraenidae

Muraenesocidae

Myrocongridae

Ophichthidae

Protanguillidae

Saccopharyngidae

Serrivomeridae

  • Serrivomer neocaledoniensis

Synaphobranchidae

Atheriniformes

Atherinidae

Atherinopsidae

  • Atherinella balsana
  • Atherinella beani
  • Atherinella elegans
  • Atherinella nesiotes
  • Atherinella pellosemeion
  • Atherinella sallei
  • Atherinella schultzi
  • Basilichthys microlepidotus
  • Chirostoma arge
  • Chirostoma contrerasi
  • Chirostoma grandocule
  • Chirostoma labarcae
  • Chirostoma reseratum
  • Membras analis
  • Membras argentea
  • Membras vagrans
  • Menidia clarkhubbsi
  • Odontesthes bonariensis
  • Odontesthes retropinnis

Bedotiidae

Pseudomugilidae

Telmatherinidae

Beloniformes

Adrianichthyidae

  • Oryzias curvinotus
  • Oryzias haugiangensis
  • Oryzias pectoralis
  • Oryzias songkhramensis
  • Oryzias wolasi
  • Oryzias uwai

Exocoetidae

Hemiramphidae

  • Hyporhamphus mexicanus
  • Hyporhamphus rosae

Zenarchopteridae

Characiformes

Acestrorhynchidae

Alestidae

Characidae

  • Acestrocephalus anomalus
  • Acestrocephalus maculosus
  • Acestrocephalus nigrifasciatus
  • Aphyocharax agassizii
  • Argopleura conventus
  • Astyanax acatlanensis
  • Astyanax baileyi
  • Astyanax biotae
  • Astyanax brevirhinus
  • Astyanax caballeroi
  • Astyanax chaparae
  • Astyanax cocibolca
  • Astyanax dorioni
  • Astyanax epiagos
  • Astyanax fasslii
  • Astyanax gisleni
  • Astyanax jacobinae
  • Astyanax jenynsii
  • Astyanax kennedyi
  • Astyanax longior
  • Astyanax megaspilura
  • Astyanax myersi
  • Astyanax nasutus
  • Astyanax paranahybae
  • Astyanax saltor
  • Astyanax scintillans
  • Astyanax villwocki
  • Astyanax yariguies
  • Brycon acuminatus
  • Bryconacidnus hemigrammus
  • Bryconamericus arilepis
  • Bryconamericus ecai
  • Bryconamericus foncensis
  • Bryconamericus guizae
  • Bryconamericus icelus
  • Bryconamericus ichoensis
  • Bryconamericus megalepis
  • Bryconamericus miraensis
  • Bryconamericus multiradiatus
  • Bryconamericus novae
  • Bryconamericus simus
  • Ceratobranchia elatior
  • Ceratobranchia joanae
  • Characidium stigmosum
  • Cheirodon australe
  • Cheirodon galusdae
  • Cheirodon jaguaribensis
  • Cheirodon kiliani
  • Cheirodon luelingi
  • Cheirodon parahybae
  • Cheirodon pisciculus
  • Chrysobrycon eliasi
  • Creagrutus ephippiatus
  • Creagrutus machadoi
  • Creagrutus molinus
  • Creagrutus mucipu
  • Creagrutus nigrotaeniatus
  • Creagrutus saxatilis
  • Creagrutus xiphos
  • Creagrutus yanatili
  • Gephyrocharax caucanus
  • Gephyrocharax martae
  • Gephyrocharax sinuensis
  • Gephyrocharax torresi
  • Hemibrycon brevispini
  • Hemibrycon cairoense
  • Hemibrycon carrilloi
  • Hemibrycon divisorensis
  • Hemibrycon decurrens
  • Hemibrycon microformaa
  • Hemibrycon paez
  • Hemibrycon quindos
  • Hemibrycon raqueliae
  • Hemibrycon santamartae
  • Hemibrycon velox
  • Hemibrycon virolinica
  • Hemibrycon yacopiae
  • Hemigrammus aereus
  • Hemigrammus matei
  • Hemigrammus megaceps
  • Hemigrammus rubrostriatus
  • Hemigrammus skolioplatus
  • Hyphessobrycon albolineatus
  • Hyphessobrycon amaronensis
  • Hyphessobrycon catableptus
  • Hyphessobrycon chocoensis
  • Hyphessobrycon columbianus
  • Hyphessobrycon condotensis
  • Hyphessobrycon hexastichos
  • Hyphessobrycon iheringi
  • Hyphessobrycon klausanni
  • Hyphessobrycon latus
  • Hyphessobrycon melazonatus
  • Hyphessobrycon notidanos
  • Hyphessobrycon paepkei
  • Hyphessobrycon piabinhas
  • Hyphessobrycon scutulatus
  • Hyphessobrycon sebastiani
  • Hyphessobrycon stramineus
  • Hyphessobrycon wajat
  • Hyphessobrycon weitzmanorum
  • Hyphessobrycon werneri
  • Jupiaba mucronata
  • Knodus delta
  • Knodus mizquae
  • Melanocharacidium melanopteron
  • Microgenys lativirgata
  • Microgenys weyrauchi
  • Mimagoniates pulcher
  • Moenkhausia crisnejas
  • Moenkhausia dorsinuda
  • Moenkhausia levidorsa
  • Moenkhausia newtoni
  • Moenkhausia orteguasae
  • Moenkhausia robertsi
  • Nematobrycon lacortei
  • Nematobrycon palmeri
  • Oligobrycon microstomus
  • Parastremma album
  • Parastremma pulchrum
  • Parastremma sadina
  • Phenacogaster carteri
  • Phenacogaster wayampi
  • Piabina anhembi
  • Prodontocharax howesi
  • Pseudochalceus bohlkei
  • Pseudochalceus kyburzi
  • Pterobrycon landoni
  • Rhinopetitia myersi
  • Roeboides bussingi
  • Roeboides loftini
  • Schultzites axelrodi
  • Trochilocharax ornatus
  • Tyttobrycon hamatus

Distichodontidae

  • Nannocharax fasciolaris

Clupeiformes

Alosidae

Clupeidae

Ehiravidae

Engraulidae

Cypriniformes

Acheilognathidae

Balitoridae

Botiidae

  • Botia kubotai
  • Botia udomritthiruji
  • Leptobotia tchangi
  • Parabotia banarescui
  • Parabotia dubia
  • Parabotia kimluani
  • Parabotia lijiangensis
  • Parabotia vancuongi
  • Sinibotia longiventralis
  • Sinibotia pulchra
  • Sinibotia robusta
  • Sinibotia superciliaris
  • Sinibotia zebra
  • Syncrossus reversus
  • Yasuhikotakia longidorsalis

Gastromyzontidae

  • Vanmanenia homalocephala

Nemacheilidae

Catostomidae

Cobitidae

Cyprinidae

Cyprinodontiformes

Aplocheilidae

Cyprinodontidae

Nothobranchiidae

Poeciliidae

Rivulidae

Gasterosteiformes

Pegasidae

Gonorynchiformes

Kneriidae

  • Kneria ansorgii
  • Kneria sjolandersi
  • Parakneria fortuita
  • Parakneria marmorata

Gymnotiformes

Apteronotidae

  • Apteronotus apurensis

Rhamphichthyidae

  • Rhamphichthys atlanticus

Ophidiiformes

Bythitidae

Osmeriformes

Osmeridae

Osteoglossiformes

Mormyridae

Osteoglossidae

Perciformes

Ambassidae

Anabantidae

Blenniidae

Centrarchidae

Cichlidae

Eleotridae

Gobiidae

Kraemeriidae

Labridae

Latidae

Odontobutidae

  • Neodontobutis tonkinensis

Percichthyidae

Percidae

Polyprionidae

Scombridae

Serranidae

Terapontidae

Xiphiidae

Salmoniformes

Galaxiidae

Salangidae

  • Neosalanx argentea
  • Salanx reevesii

Salmonidae

Scorpaeniformes

Cottidae

Siluriformes

Amblycipitidae

Amphiliidae

Ariidae

Auchenipteridae

Bagridae

Clariidae

Claroteidae

Diplomystidae

Heptapteridae

Ictaluridae

Loricariidae

Mochokidae

Pimelodidae

Schilbeidae

  • Parailia occidentalis
  • Proeutropiichthys taakree
  • Schilbe angolensis
  • Schilbe nyongensis

Siluridae

Sisoridae

  • Glyptothorax sinensis
  • Pseudecheneis intermedia

Trichomycteridae

Synbranchiformes

Mastacembelidae

  • Macrognathus lineatomaculatus
  • Macrognathus meklongensis
  • Macrognathus obscurus
  • Macrognathus pavo
  • Macrognathus perakensis
  • Mastacembelus ansorgii
  • Mastacembelus pantherinus
  • Mastacembelus shiloangoensis
  • Mastacembelus thacbaensis
  • Mastacembelus undulatus

Synbranchidae

Syngnathiformes

Syngnathidae

Tetraodontiformes

Tetraodontidae

Amphibia

Anura

Amphignathodontidae

Aromobatidae

Arthroleptidae

Brachycephalidae

Brevicipitidae

Bufonidae

Centrolenidae

Ceratobatrachidae

Ceratophryidae

Craugastoridae

Cryptobatrachidae

Cycloramphidae

Dendrobatidae

Dicroglossidae

Eleutherodactylidae

Hemisotidae

Hylidae

Hylodidae

Hyperoliidae

Leiuperidae

Leptodactylidae

Mantellidae

Megophryidae

Micrixalidae

Microhylidae

Myobatrachidae

Nyctibatrachidae

Phrynobatrachidae

Pipidae

Ptychadenidae

Pyxicephalidae

Ranidae

Ranixalidae

Rhacophoridae

Strabomantidae

Caudata

Ambystomatidae

Hynobiidae

Plethodontidae

Salamandridae

Gymnophiona

Caeciliidae

Ichthyophiidae

Rhinatrematidae

Aves

Apodiformes

Apodidae

Trochilidae

Caprimulgiformes

Aegothelidae

Caprimulgidae

Columbiformes

Columbidae

Coraciiformes

Alcedinidae

Falconiformes

Accipitridae

Gruiformes

Rallidae

Turnicidae

Passeriformes

Alaudidae

Campephagidae

Cisticolidae

Cracticidae

Estrildidae

Eupetidae

Fringillidae

Hirundinidae

Melanocharitidae

Meliphagidae

Motacillidae

Muscicapidae

Petroicidae

Ploceidae

Pycnonotidae

Sylviidae

Timaliidae

Vangidae

Zosteropidae

Piciformes

Indicatoridae

Ramphastidae

Procellariiformes

Hydrobatidae

Strigiformes

Strigidae

Tytonidae

Cephalaspidomorphi

Petromyzontiformes

Petromyzontidae

Chondrichthyes

Carcharhiniformes

Carcharhinidae

Hemigaleidae

Proscylliidae

Pseudotriakidae

Scyliorhinidae

Sphyrnidae

Triakidae

Chimaeriformes

Chimaeridae

Rhinochimaeridae

Heterodontiformes

Heterodontidae

Hexanchiformes

Hexanchidae

Lamniformes

Megachasmidae

Odontaspididae

Orectolobiformes

Ginglymostomatidae

Hemiscylliidae

Orectolobidae

Parascylliidae

Pristiophoriformes

Pristiophoridae

Rajiformes

Anacanthobatidae

Arhynchobatidae

Dasyatidae

Gymnuridae

Mobulidae

Myliobatidae

Narcinidae

Narkidae

Platyrhinidae

Potamotrygonidae

Rajidae

Rhinobatidae

Rhinopteridae

  • Rhinoptera neglecta

Torpedinidae

Urolophidae

Urotrygonidae

Zanobatidae

Squaliformes

Centrophoridae

Dalatiidae

Echinorhinidae

Etmopteridae

Oxynotidae

Somniosidae

Squalidae

Squatiniformes

Squatinidae

Mammalia

Afrosoricida

Chrysochloridae

Tenrecidae

Carnivora

Herpestidae

Viverridae

Cetartiodactyla

Balaenopteridae

Bovidae

Cervidae

Delphinidae

Iniidae

Neobalaenidae

Phocoenidae

Physeteridae

Suidae

Tayassuidae

Tragulidae

Ziphiidae

Chiroptera

Emballonuridae

Hipposideridae

Molossidae

Nycteridae

Phyllostomidae

Pteropodidae

Rhinolophidae

Rhinopomatidae

Thyropteridae

Vespertilionidae

Cingulata

Dasypodidae

Dasyuromorphia

Dasyuridae

Didelphimorphia

Didelphidae

Diprotodontia

Macropodidae

Phalangeridae

Eulipotyphla

Erinaceidae

Soricidae

Talpidae

Lagomorpha

Leporidae

Ochotonidae

Macroscelidea

Macroscelididae

Notoryctemorphia

Notoryctidae

Peramelemorphia

Peramelidae

Primates

Aotidae

Atelidae

Callitrichidae

Cebidae

Cercopithecidae

  • Cercocebus chrysogaster
  • Cercopithecus ascanius atrinasus
  • Cercopithecus cephus ngottoensis
  • Cercopithecus mitis francescae
  • Cercopithecus mitis mitis
  • Colobus guereza dodingae
  • Colobus guereza gallarum
  • Colobus guereza matschiei
  • Lophocebus aterrimus opdenboschi
  • Macaca fascicularis atriceps
  • Macaca fascicularis aureus
  • Macaca fascicularis fuscus
  • Macaca fascicularis karimondjawae
  • Macaca fascicularis lasiae
  • Macaca fascicularis tua
  • Presbytis femoralis percura
  • Presbytis hosei hosei
  • Presbytis melalophos bicolor
  • Presbytis rubicunda carimatae
  • Presbytis rubicunda chrysea
  • Presbytis siamensis rhionis
  • Trachypithecus barbei
  • Trachypithecus pileatus brahma

Cheirogaleidae

Galagidae

Hylobatidae

Indriidae

Lemuridae

Lepilemuridae

Lorisidae

  • Perodicticus potto stockleyi

Pitheciidae

Tarsiidae

Rodentia

Abrocomidae

Anomaluridae

Bathyergidae

Calomyscidae

Caviidae

Chinchillidae

Cricetidae

Ctenodactylidae

Ctenomyidae

Dasyproctidae

Dipodidae

Echimyidae

Erethizontidae

Geomyidae

Gliridae

Heteromyidae

Muridae

Nesomyidae

Octodontidae

Sciuridae

Spalacidae

Scandentia

Tupaiidae

Reptilia

Squamata

Agamidae

Anguidae

Anomochilidae

Colubridae

Elapidae

Gekkonidae

Lacertidae

Leptotyphlopidae

Phrynosomatidae

Polychrotidae

Scincidae

Teiidae

Tropiduridae

Typhlopidae

Viperidae

Xantusiidae

Xenosauridae

Testudines

Chelidae

Cheloniidae

Emydidae

Kinosternidae

Pelomedusidae

Testudinidae

Trionychidae

References

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