A new genus and species of abyssal sponge commonly encrusting polymetallic nodules in the Clarion-Clipperton Zone, East Pacific Ocean

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Lim, S. C. (författare)

A new genus and species of abyssal sponge commonly encrusting polymetallic nodules in the Clarion-Clipperton Zone, East Pacific Ocean

Artikel/kapitelEngelska2017

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2017-09-24
Informa UK Limited,2017

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LIBRIS-ID:oai:gup.ub.gu.se/259491
https://gup.ub.gu.se/publication/259491URI
https://doi.org/10.1080/14772000.2017.1358218DOI

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Språk:engelska

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The Clarion-Clipperton Zone (CCZ) in the East Pacific is a vast region targeted for deep-sea mineral exploration, for which there are almost no published taxonomic data. Here we describe Plenaster craigi gen. nov. sp. nov. from depths of similar to 4000 m in the eastern CCZ polymetallic nodule province. Despite over 40 years of intense exploration in the area, we reveal that P. craigi sp. nov. is the most abundant sponge and the most common metazoan encrusting on nodules in our study area at the eastern CCZ. It has a mean abundance of 15.3 +/- 8.9 individuals per m 2 across 11 stations in a 30 x 30 km study site nested within the Singapore exploration area. The white encrusting sponge is filled with spheroxyasters with occasional styles protruding the surface. Plenaster craigi sp. nov. is morphologically similar to genera from three different families in two orders: Timea (Timeidae; Tethyida); Hemiasterella and Leptosastra (Hemiasterellidae; Tethyida); and Paratimea (Stelligeridae; Axinellida). However, based on the molecular (COI and 28S) phylogenetic trees generated in this study, P. craigi sp. nov. was located in the Order Axinellida and appeared to be distant to Timea, Hemiasterella, Leptosastra, and Paratimea. We propose a new genus for our material to be placed provisionally in the family Stelligeridae, as it is the only family in the order Axinellida whose members possess euasters. This provisional placement may change when sequences of the type specimens of these genera and advanced phylogenetic reconstruction methods become available in the future. However, we have shown clearly that Plenaster gen. nov. is unique and distinct from all currently known taxa. Plenaster craigi sp. nov. being an abundant metazoan encrusting on nodule and easily identified filter-feeding animal is a potentially indicator species for future mining impacts in the eastern CCZ, and possibly across the entire CCZ.

Ämnesord och genrebeteckningar

NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng
NATURVETENSKAP Biologi Biologisk systematik hsv//swe
NATURAL SCIENCES Biological Sciences Biological Systematics hsv//eng
28S
abyss
deep-sea mining
manganese nodule
new species
Plenaster gen. nov.
Porifera
multiple sequence alignment
porifera demospongiae
north pacific
morphological characters
phylogenetic inference
fracture-zone
systematics
fauna
foraminifera
megafauna
Biodiversity & Conservation
Life Sciences & Biomedicine

Biuppslag (personer, institutioner, konferenser, titlar ...)

Wiklund, H. (författare)
Glover, A. G. (författare)
Dahlgren, Thomas G.,1963Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences(Swepub:gu)xdahth (författare)
Tan, K. S. (författare)
Göteborgs universitetInstitutionen för marina vetenskaper (creator_code:org_t)

Sammanhörande titlar

Ingår i:Systematics and Biodiversity: Informa UK Limited15:6, s. 507-5191477-20001478-0933

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Av författaren/redakt...: Lim, S. C.; Wiklund, H.; Glover, A. G.; Dahlgren, Thomas ...; Tan, K. S.

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NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Ekologi

NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Biologisk system ...

Artiklar i publikationen: Systematics and ...

Av lärosätet: Göteborgs universitet

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