Ophiuroid fauna of cobalt-rich crust seamounts in the Northwest Pacific Ocean

Chen, Wanying; Na, Jieying; Shen, Chengcheng; Zhang, Ruiyan; Lü, Bo; Cheng, Hong; Wang, Chunsheng; Zhang, Dongsheng

doi:10.1007/s13131-021-1887-y

Cited by 4 publications

(3 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on these results, it is evident that the summit of OSM17 is a region of high DSi suitable for the survival and growth of Farrea occa. Farrea occa species were identified at a depth of 1935 m in Weijia Guyot in the Magellan seamount cluster (Chen et al, 2021), and the FMP was similar to that of previous studies on the oscular diameter, thickness, and length of the main tube (Reiswig, 2002;Ehrlich et al, 2007;Ehrlich, 2019). The results of this study are consistent with those of previous studies on the species identification of porifera.…”

Section: Identification Of Porifera Species and Reconstruction Of The...supporting

confidence: 91%

Geochemical-mineralogical analysis of ferromanganese oxide precipitated on porifera in the Magellan seamount, western Pacific

et al. 2023

View full text Add to dashboard Cite

This study investigated ferromanganese oxide (Fe-Mn oxide) precipitated on porifera located on the tabletop of the Magellan seamount (OSM17, 1571 m depth) in the western Pacific. As the growth rate of Fe-Mn oxide is several mm/Myr and porifera skeletons are difficult to preserve posthumously, geochemical and mineralogical studies have not yet been conducted on this topic. Fe-Mn oxides from porifera have a morphological differentiation from general ferromanganese deposits because porifera act as substrates for the Fe-Mn oxide. The thickness of Fe-Mn oxide cannot be visually confirmed because it thinly precipitates on the skeletons of porifera. Therefore, high-resolution fluctuations are reflected in marine environmental factors, such as redox conditions and surface productivity over tens of thousands of years, compared to ferromanganese deposits representing tens of millions of years. Hence, the geochemical and mineralogical characteristics were investigated. Porifera skeletons were confirmed, displaying a stratified lattice-like structure, thickness of Fe-Mn oxide of up to 110 μm, and age of approximately 55,000 years. Irregular distribution of major elements of Fe-Mn oxide, Mn, Fe, Ni, and Co was due to the characteristics of the structures. The presence of Fe-vernadite, identified by quantitative and mineralogical analysis, indicates oxidative environmental conditions at the tabletop of OSM17. Biomineralization was identified by confirming the presence of Fe-Mn oxides with a globular, sheath-like structure. Because of its conservation state, species identification of porifera was not based on the shape of the spicule, but was confirmed to be Farrea occa. This study verified that the tabletop of OSM17 has been in an oxidative environment for approximately 55,000 years, and through species identification, high dissolved silica (DSi) concentrations provide appropriate conditions for Farrea occa to survive. The sample in this study can be used as a new indicator in paleo-environment research.

show abstract

Section: Identification Of Porifera Species and Reconstruction Of The...supporting

confidence: 91%

Geochemical-mineralogical analysis of ferromanganese oxide precipitated on porifera in the Magellan seamount, western Pacific

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Most of the specimens were frozen without preservation fluid, then transported to the Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences ( CAS ), Sanya, China, for further analysis. The samples were sorted and the species identified using available literature ( Thomson 1877 ; Lyman 1878 , 1882 , 1883 ; Koehler 1904 , 1922 , 1930 , 1897 ; Clark 1900 , 1911 , 1915 , 1939 ; Matsumoto 1917 ; Clark 1949 ; Mortensen 1933 ; John and Clark 1954 ; Cherbonnier and Sibuet 1972 ; Guille 1981 ; O’Hara and Stöhr 2006 ; Chen et al 2021a , b ; Na et al 2021 ) and by molecular analysis.…”

Section: Materials and Methodsmentioning

confidence: 99%

“…Recent studies suggested Ophioplinthaca species were dominant megafauna on seamounts from the Northwest Pacific region ( Cho and Shank 2010 ; Chen et al 2021a ; Na et al 2021 ). However, species diversity and geography of Ophioplinthaca species are still not fully understood due to limited collecting efforts in this area ( Cho and Shank 2010 ; Yesson et al 2011 ; Chen et al 2021a , b ; Na et al 2021 ). Previous morphological studies reported that Ophioplinthaca species were difficult to separate due to complex intraspecific morphological variation ( O’Hara and Stöhr 2006 ; Chen et al 2021a , b ; Na et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Review of Ophioplinthaca Verrill, 1899 (Echinodermata, Ophiuroidea, Ophiacanthidae), description of new species in Ophioplinthaca and Ophiophthalmus, and new records from the Northwest Pacific and the South China Sea

Nethupul¹,

Stöhr²,

Zhang³

2022

View full text Add to dashboard Cite

The ophiuroid genus Ophioplinthaca is well characterized by the deep incisions in the disc. Prior to this study, it contained 32 accepted species, but species limits and geographic distributions were not well understood. The manned submersible vehicle ‘Shenhaiyongshi’ was used to collect ophiuroid specimens from the deep-sea seamounts and cold seeps in the South China Sea and Northwest Pacific at 602–3600 m depth, during 2018 to 2020. The genus Ophioplinthaca was reviewed using both morphological data and a phylogenetic analysis, based on COI sequences. The taxonomic status of the genus Ophiophthalmus Matsumoto, 1917, a junior homonym of Ophiophthalmus Fitzinger, 1843 (a reptile) was clarified by proving prevailing usage of the ophiuroid name. A total of eight species were identified, including two new species, described asOphioplinthaca brachispinasp. nov. and Ophiophthalmus serratussp. nov., and two new records. The new species are characterized by unique features of the arm skeletons. Tabular keys to all Ophioplinthaca and Ophiophthalmus species are provided. Interspecific and intraspecific genetic distance of Ophioplinthaca species ranged from 2.32% to 19.72%, and from 0.26% to 0.90%, respectively. The data suggest that species of the genus Ophioplinthaca are more widely spread around the Northwest Pacific region deep-sea seamounts than previously known.

show abstract

Community structure of benthic megafauna on a seamount with cobalt-rich ferromanganese crusts in the northwestern Pacific Ocean

Shen

Lü

et al. 2021

Deep Sea Research Part I: Oceanographic Research Papers

View full text Add to dashboard Cite

Ophiuroid fauna of cobalt-rich crust seamounts in the Northwest Pacific Ocean

Cited by 4 publications

References 68 publications

Geochemical-mineralogical analysis of ferromanganese oxide precipitated on porifera in the Magellan seamount, western Pacific

Geochemical-mineralogical analysis of ferromanganese oxide precipitated on porifera in the Magellan seamount, western Pacific

Review of Ophioplinthaca Verrill, 1899 (Echinodermata, Ophiuroidea, Ophiacanthidae), description of new species in Ophioplinthaca and Ophiophthalmus, and new records from the Northwest Pacific and the South China Sea

Community structure of benthic megafauna on a seamount with cobalt-rich ferromanganese crusts in the northwestern Pacific Ocean

Contact Info

Product

Resources

About

Ophiuroid fauna of cobalt-rich crust seamounts in the Northwest Pacific Ocean

Cited by 4 publications

References 68 publications

Geochemical-mineralogical analysis of ferromanganese oxide precipitated on porifera in the Magellan seamount, western Pacific

Geochemical-mineralogical analysis of ferromanganese oxide precipitated on porifera in the Magellan seamount, western Pacific

﻿Review of Ophioplinthaca Verrill, 1899 (Echinodermata, Ophiuroidea, Ophiacanthidae), description of new species in Ophioplinthaca and Ophiophthalmus, and new records from the Northwest Pacific and the South China Sea

Community structure of benthic megafauna on a seamount with cobalt-rich ferromanganese crusts in the northwestern Pacific Ocean

Contact Info

Product

Resources

About

Review of Ophioplinthaca Verrill, 1899 (Echinodermata, Ophiuroidea, Ophiacanthidae), description of new species in Ophioplinthaca and Ophiophthalmus, and new records from the Northwest Pacific and the South China Sea