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Exaiptasia diaphana (Rapp, 1829)

photo of K. Sanamyan: specimen from reef tank
     
Exaiptasia diaphana This species is well known for every marine aquarist as a pest anemone "Aiptasia". In 2014 Grajales and Rodriguez showed that it differs in some significant points from true Aiptasia species and created a new genus Exaiptasia for it. These authors also synonymized several Aiptasia species, including European species Aiptasia diaphana (Rapp, 1829), with Aiptasia pallida (Agassiz in Verrill, 1864). In accordance with the International Code of Zoological Nomenclature the older name (Aiptasia diaphana) must be used as valid name. Grajales and Rodriguez (2014), however, preferred to use the junior (=invalid) synonym Aiptasia pallida as a valid species name. To validate the usage of the name Aiptasia pallida a request has been sent to International Commission on Zoological Nomenclature (Case 3633). The request has been declined by Commission in 2017 (Opinion 2404) - according to the decision of Commission the name Aiptasia diaphana has a precedence over Aiptasia pallida and therefore in the case of synonymisation of these two species valid name would be Aiptasia diaphana.

In 2019 Grajales and Rodriguez again submitted similar request to Commission (Case 3790). These authors claimed: "While the case is under consideration, the junior name is to be maintained". This opinion is wrong, this case is regulated by Article 82.1 which reads: "When a case is under consideration by the Commission, prevailing usage (see Glossary) of names is to be maintained until the ruling of the Commission is published." The key phrase here is the "prevailing usage". The name Aiptasia diaphana was (and is) widely used as a valid name for European specimens of this species by many authors (i.e. prevailingly used in Europe) and we see no reason why younger (=invalid) synonym, Aiptasia pallida, should be given a precedence. Valid name for this species is Exaiptasia diaphana. See a similar case described under Adamsia palliata.


Taxonomic position:
Phylum: Cnidaria
Class: Anthozoa
Order: Actiniaria

Family: Aiptasiidae

Species: Exaiptasia diaphana (Rapp, 1829)

Species list of sea anemones:
  • Acricoactis brachyacontis
  • Actinernus robustus
  • Actinia equina
  • Actinodendron sp
  • Actinostella bradleyi
  • Actinostephanus haeckeli
  • Actinostola chilensis
  • Actinothoe sphyrodeta
  • Adamsia palliata
  • Aiptasia couchii
  • Aiptasia mutabilis
  • Alicia mirabilis
  • Alicia sansibarensis
  • Allantactis parasitica
  • Amplexidiscus fenestrafer
  • Andresia parthenopea
  • Anemonia alicemartinae
  • Anemonia viridis
  • Antholoba achates
  • Anthopleura elegantissima
  • Anthopleura hermaphroditica
  • Anthopleura orientalis
  • Anthopleura sola
  • Anthopleura xanthogrammica
  • Anthothoe chilensis
  • Armactinia antarctica
  • Artemidactis victrix
  • Aulactinia vancouverensis
  • Aulactinia vladimiri
  • Bathyphellia margaritacea
  • Boloceroides mcmurrichi
  • Boloceropsis platei
  • Bunodactis verrucosa
  • Calliactis polypus
  • Cereus herpetodes
  • Cereus pedunculatus
  • Cerianthus lloydii
  • Charisea saxicola
  • Cnidopus japonicus
  • Condylactis aurantiaca
  • Condylactis gigantea
  • Corallimorphus karinae
  • Corallimorphus pilatus
  • Corynactis californica
  • Corynactis carnea
  • Corynactis viridis
  • Cribrinopsis albopunctata
  • Cribrinopsis crassa
  • Cribrinopsis fernaldi
  • Cribrinopsis olegi
  • Cribrinopsis rubens
  • Cryptodendrum adhaesivum
  • Dactylanthus antarcticus
  • Diadumene lineata
  • Discosoma nummiforme
  • Dofleinia armata
  • Edwardsia inachi
  • Edwardsiella loveni
  • Entacmaea quadricolor
  • Epiactis prolifera
  • Epizoanthus couchii
  • Epizoanthus fiordicus
  • Exaiptasia diaphana
  • Glyphoperidium bursa
  • Gonactinia prolifera
  • Gyractis octoradiata
  • Halcampa arctica
  • Halcampoides sp
  • Halcampoides mediterranea
  • Halcurias pilatus
  • Heteractis aurora
  • Heterodactyla hemprichii
  • Hormathia lacunifera
  • Hormathia nodosa
  • Hormathia pacifica
  • Hormathia pectinata
  • Hormosoma scotti
  • Isaurus tuberculatus
  • Isoparactis fabiani
  • Isoparactis fionae
  • Isosicyonis alba
  • Korsaranthus natalensis
  • Liponema brevicorne
  • Macrodactyla doreensis
  • Megalactis griffithsi
  • Mesozoanthus fossii
  • Metridium farcimen
  • Metridium lobatum
  • Metridium senile
  • Metridium senile fimbriatum
  • Nemanthus sp
  • Octineon suecicum
  • Oulactis concinnata
  • Pachycerianthus multiplicatus
  • Pachycerianthus solitarius
  • Paracondylactis sinensis
  • Paracorynactis hoplites
  • Paraisanthus tamarae
  • Paranthus niveus
  • Parazoanthus anguicomus
  • Parazoanthus axinellae
  • Parazoanthus elongatus
  • Peachia cylindrica
  • Phellia exlex
  • Phelliactis callicyclus
  • Phyllodiscus semoni
  • Phymactis papillosa
  • Phymanthea pluvia
  • Phymanthus crucifer
  • Phymanthus species
  • Platyzoanthus mussoides
  • Protanthea simplex
  • Protopalythoa mutuki
  • Pseudocorynactis caribbeorum
  • Ptychodactis aleutiensis
  • Ptychodactis patula
  • Radianthus crispa
  • Radianthus magnifica
  • Radianthus malu
  • Rhodactis inchoata
  • Rhodactis indosinensis
  • Ricordea yuma
  • Sagartia elegans
  • Sicyonis heliodiscus
  • Spongiactis japonica
  • Stichodactyla gigantea
  • Stichodactyla haddoni
  • Stichodactyla tapetum
  • Stomphia coccinea
  • Telmatactis sp
  • Triactis producta
  • Urticina clandestina
  • Urticina columbiana
  • Urticina crassicornis
  • Urticina eques
  • Urticina felina
  • Urticina grebelnyi
  • Urticina kurila
  • Urticina mcpeaki
  • Verrillactis paguri

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