Redescription of Synactinernus flavus for the First Time after a Century and Description of Synactinernus churaumi sp. nov. (Cnidaria: Anthozoa: Actiniaria)

Izumi, Tomio; Fujii, Takuma; Yanagi, Kensuke; Higashiji, Takuo; Fujita, Toshihiko

doi:10.2108/zs190040

Cited by 8 publications

(13 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sample collection, preservation, and ecological observation. Sample collections and observations were performed in the same method as described by Izumi et al (2019): anemones were found by remotely operated vehicles (ROV) to the east off Ishigaki and Okinawa Islands, Okinawa Prefecture (Fig. 1), on 5 April 2006, 19 July 2017, and 7 January 2019.…”

Section: Methodsmentioning

confidence: 99%

Gigantic Anemone Species in the Deep ‘Churaumi’—Description of a New Species of the Genus Telmatactis (Cnidaria: Anthozoa: Actiniaria: Metridioidea), Telmatactis profundigigantica sp. nov.

Izumi

Higashiji

2023

Spec.Div.

Self Cite

View full text Add to dashboard Cite

Although the members of the genus Telmatactis Gravier, 1916 have been reported from broad area of the world including Japanese waters, the localities of the species have been limited to shallow areas. In this study, we report a new species in this genus, Telmatactis profundigigantica sp. nov., collected from the deeper area than 200 m of the East China Sea off Okinawa Island, discovered by ROV, and taken care of in Okinawa Churaumi Aquarium. This new species is chiefly characterized by its comparatively huge size of its body, over 10 cm in diameter and height, far larger than the other known species of this genus. Moreover, this species has characteristic multiple-headed tentacles and large cnidae in its acrospheres. In the present article, we also discuss the severe toxicity of this species and touch on the ecology of deep-sea anemones.

show abstract

Section: Methodsmentioning

confidence: 99%

Gigantic Anemone Species in the Deep ‘Churaumi’—Description of a New Species of the Genus Telmatactis (Cnidaria: Anthozoa: Actiniaria: Metridioidea), Telmatactis profundigigantica sp. nov.

Izumi

Higashiji

2023

Spec.Div.

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, it can be easily distinguished from those genera because of the bilateral arrangement of the younger mesenteries in Actinernus (cyclic in the other two genera, Carlgren, 1918;Uchida, 2007;Izumi et al, 2019) and the distinct mesogleal aboral thickenings in the base of the tentacles in Actinernus (not distinct in the other two genera) (Izumi et al, 2019); furthermore, the lobes in species of Actinernus are not as marked as those in the other two genera (see Izumi et al, 2019). Actinernus mercedae is the third species of the genus described for the Southern Ocean: Actinernus antarcticus and A. mercedae are present in the Atlantic portion of Antarctica whereas A. elongatus is known from the sub-Antarctic Indian Ocean.…”

Section: Methodsmentioning

confidence: 99%

Deep-Sea Anemones (Cnidaria: Anthozoa: Actiniaria) from the South Atlantic

Gusmão

Rodríguez

2021

Bulletin of the American Museum of Natural History

View full text Add to dashboard Cite

Brazil has the longest coastline in South America with more than 7491 km of hydrologically and topologically complex continental margin. Despite its extensive coast, the sea anemone fauna of the country is sparsely known with only 54 species recorded. Difficulties of accessing Brazil's highly diversified coast and the historical small number of dredging expeditions and sea anemone taxonomists have contributed to the limited knowledge of its sea anemone diversity particularly in deep waters. Most species recorded from Brazil correspond to large, conspicuous intertidal species and only five species have been recorded from depths greater than 200 m: two small burrowing edwardsiids and three hormathiids from the southern coast of Brazil. Here, we provide complete descriptions, images of external and internal anatomy, microanatomy, cnidae, and geographic distribution for 10 species, six off the coast of Brazil and four from the southern portion of the Mid-Atlantic Ridge, one of which is also present in the Southern Ocean. Four of the six species found in Brazil represent new records of geographically widespread species for the country and the remaining two endemic species have their geographic and bathymetric ranges significantly extended northward. As a result, the number of species known for the Brazilian coast is raised to 63 species, 14 of which are known from the deep sea. We also recorded four deep-sea species in the south Mid-Atlantic Ridge (SMAR), including Actinernus mercedae, sp. nov., and two new records for the South Atlantic. We found that the deep-sea fauna of Brazil shares two deep-sea species with Argentina and two with the North Atlantic. Thus, La Plata River acts as a filter for shallow water species between Brazil and Argentina but is less effective for deep-sea anemones. The diversity of sea anemones recorded for SMAR shows similarities to the southwestern Atlantic and Southern Ocean. Finally, our finding of representatives of Bolocera in the SMAR and Actinoscyphia off the Brazilian coast suggests that they are bipolar genera with tropical emergence.

show abstract

“…The amplified products were verified on 1% agarose gel, purified using a High Pure PCR Product Purification Kit (Roche), and sequenced (Eurofins Genomics, Louisville, KY) using PCR primers for COXIII, 12S, and 16S or PCR and sequencing primers for 18S and 28S. The primers and the procedures for each amplification followed those of Izumi et al (2019). The sequence data were assembled using GeneStudio Professional version 2.2.0.0 and deposited in the DNA Data Bank of Japan (DDBJ) (Table A1).…”

Section: Molecular Analysismentioning

confidence: 99%

Carcinoecium-Forming Sea Anemone Stylobates calcifer sp. nov. (Cnidaria, Actiniaria, Actiniidae) from the Japanese Deep-Sea Floor: A Taxonomical Description with Its Ecological Observations

Yoshikawa

Izumi

Moritaki

et al. 2022

The Biological Bulletin

Self Cite

View full text Add to dashboard Cite

Here we describe Stylobates calcifer sp. nov. (Cnidaria, Actiniaria, Actiniidae), a new carcinoecium-forming sea anemone from the deep-sea floor of Japan. Stylobates produces a carcinoecium that thinly covers the snail shells inhabited by host hermit crabs Pagurodofleinia doederleini. The new species is distinct from other species by the shape of the marginal sphincter muscle, the distribution of cnidae, the direction of the oral disk, and host association. The species' novelty is supported by the data of its mitochondrial genes 12S, 16S, and COIII and nuclear genes 18S and 28S. Also, we conducted behavioral observation of this new species, focusing on the feeding behavior and interaction with the specific host hermit crab. Our observations suggest that this sea anemone potentially feeds on the suspended particulate organic matter from the water column or the food residuals of hermit crabs. When the host's shell changed, intensive manipulation for transference of S. calcifer sp. nov. was recorded. However, although the hermit crab detached and transferred the sea anemone to the new shell after shell change, the sea anemone did not exhibit active or cooperative participation. Our data suggest that the sea anemone may not produce a carcinoecium synchronously to its host's growth, contrary to the anecdotal assumption about carcinoecium-forming sea anemones. Conversely, the host hermit crab's growth may not depend entirely on the carcinoecium produced by the sea anemone. This study is perhaps the first observation of the behavioral interaction of the rarely studied carcinoecium-forming mutualism in the deep sea.

show abstract

Redescription of Synactinernus flavus for the First Time after a Century and Description of Synactinernus churaumi sp. nov. (Cnidaria: Anthozoa: Actiniaria)

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 8 publications

References 16 publications

Gigantic Anemone Species in the Deep ‘Churaumi’—Description of a New Species of the Genus <i>Telmatactis</i> (Cnidaria: Anthozoa: Actiniaria: Metridioidea), <i>Telmatactis profundigigantica</i> sp. nov.

Gigantic Anemone Species in the Deep ‘Churaumi’—Description of a New Species of the Genus <i>Telmatactis</i> (Cnidaria: Anthozoa: Actiniaria: Metridioidea), <i>Telmatactis profundigigantica</i> sp. nov.

Deep-Sea Anemones (Cnidaria: Anthozoa: Actiniaria) from the South Atlantic

Carcinoecium-Forming Sea Anemone Stylobates calcifer sp. nov. (Cnidaria, Actiniaria, Actiniidae) from the Japanese Deep-Sea Floor: A Taxonomical Description with Its Ecological Observations

Contact Info

Product

Resources

About