First insights into the phylogeny of deep-sea glass sponges (Hexactinellida) from polymetallic nodule fields in the Clarion-Clipperton Fracture Zone (CCFZ), northeastern Pacific

Kersken, Daniel; Kocot, Kevin M.; Janussen, Dorte; Schell, Tilman; Pfenninger, Markus; Arbizu, Pedro Martínez

doi:10.1007/s10750-017-3498-3

Cited by 11 publications

(18 citation statements)

References 31 publications

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“…Caulophacella groups outside of Caulophacus, as sister to all other Lanuginellinae included here. This is different from previous studies that resolved a closer relationship of Caulophacella to Doconesthes and Lophocalyx (Dohrmann et al, 2017;Kersken et al, 2018;Dohrmann, 2019).…”

Section: Phylogenetic Analysis 16s Rdna and Coi Gene Phylogenycontrasting

confidence: 99%

“…Therefore, there are currently 4 subgenera of Caulophacus, which are differentiated by the terminations of microscleres: C. (Caulodiscus) having discoidal and onychoidal terminations, C. (Caulophacella) having exclusively oxyoidal terminations, C. (Caulophacus) mainly having discoidal terminations, and C. (Oxydiscus) having oxyoidal and discoidal terminations (Tabachnick, 2002;Janussen et al, 2004). However, molecular phylogenetic analyses indicate that inclusion of Caulophacella in Caulophacus is not justified and that C. (Caulodiscus) and C. (Caulophacus) are not monophyletic groups (Dohrmann et al, 2008;Dohrmann et al, 2017;Kersken et al, 2018;Dohrmann, 2019). Thus, the intrageneric classification scheme of Caulophacus requires revision based on morphological and molecular data.…”

Section: Introductionmentioning

confidence: 99%

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A new species of Caulophacus (Hexactinellida: Lyssacinosida: Rossellidae) from the western Pacific Ocean, with new insights into the mitochondrial genome characteristics of hexactinellid sponges

Gong

Yang²,

Janussen³

et al. 2023

Front. Mar. Sci.

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A new species, belonging to the rossellid subfamily Lanuginellinae Gray, 1872, is described based on two specimens collected from two different seamounts in the western Pacific Ocean. Species characterization was approached by analyzing the morphological and skeletal features as well as the complete mitochondrial genome. Caulophacus (Caulodiscus) iocasicus sp. nov. is distinguishable from its congeners by its branched external shape and a unique combination of microscleres. It only has hemionychohexasters while other C. (Caulodiscus) species additionally have either onychohexasters or discohexasters. Furthermore, the new species has microhexactins, which have not been reported from the other six species of C. (Caulodiscus). Regarding the mitochondrial genome, the occurrence of the atp8 gene, the absence of tRNA E, the translocation of tRNA D between cob and nad6, and the rearrangement of nad6-nad4 distinguish the new species from other rossellids and even other hexactinellids for which mitogenomic information is available. The herein revised morphological and molecular information of the genus Caulophacus also suggests that the monospecific subgenus C. (Caulophacella) should be removed from Caulophacus and reinstated as a separate genus in the subfamily Lanuginellinae.

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Section: Phylogenetic Analysis 16s Rdna and Coi Gene Phylogenycontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new species of Caulophacus (Hexactinellida: Lyssacinosida: Rossellidae) from the western Pacific Ocean, with new insights into the mitochondrial genome characteristics of hexactinellid sponges

Gong

Yang²,

Janussen³

et al. 2023

Front. Mar. Sci.

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“…The phylogeny of the family Pheronematidae through molecular approaches had been explored by Kersken's (2018) and Dohrmann's (2018). And they have obtained similar phylogenetic tree.…”

Section: Discussionmentioning

confidence: 99%

Phylogeny of two new pheronematid sponges from the Caroline Seamount and South China Sea

Gong

Lee

2020

Contrib. Zool.

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Two new species of genus Pheronemoides are described in this study. The Specimens were collected from the South China sea and the Caroline seamount in the northwestern Pacific Ocean. Pheronemoides crustiformis sp. nov. differs from its congeners in exhibiting large microamphidiscs, whip-like and slightly bent microuncinates and small spiny microdiactins. Pheronemoides curvipentactin sp. nov. possesses special pentactine atrialia with round terminal or tapering terminal curved pinular rays and crooked pentactins, making it easily distinguishable from its congeners. Partial sequences of the 28S rDNA and 16S rDNA genes were also amplified to confirm the family assignment of the two new species and to explore the systematic status of Pheronemoides.

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“…of larger filter-feeding organisms (Tilot et al, 2018;Simon-Lledó et al, 2019c), such as sponges (stalked - Kersken et al, 2018;encrusting -Lim et al, 2017), stalked and non-stalked crinoids, soft and hard corals (Cairns, 2016), xenophyophores (Gooday et al, 2017, sabellid worms, etc. (Bluhm, 2001).…”

Section: Polymetallic Nodules and Associated Faunamentioning

confidence: 99%

Megafauna community assessment of polymetallic-nodule fields with cameras: platform and methodology comparison

et al. 2020

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Abstract. With the mining of polymetallic nodules from the deep-sea seafloor once more evoking commercial interest, decisions must be taken on how to most efficiently regulate and monitor physical and community disturbance in these remote ecosystems. Image-based approaches allow non-destructive assessment of the abundance of larger fauna to be derived from survey data, with repeat surveys of areas possible to allow time series data collection. At the time of writing, key underwater imaging platforms commonly used to map seafloor fauna abundances are autonomous underwater vehicles (AUVs), remotely operated vehicles (ROVs) and towed camera “ocean floor observation systems” (OFOSs). These systems are highly customisable, with cameras, illumination sources and deployment protocols changing rapidly, even during a survey cruise. In this study, eight image datasets were collected from a discrete area of polymetallic-nodule-rich seafloor by an AUV and several OFOSs deployed at various altitudes above the seafloor. A fauna identification catalogue was used by five annotators to estimate the abundances of 20 fauna categories from the different datasets. Results show that, for many categories of megafauna, differences in image resolution greatly influenced the estimations of fauna abundance determined by the annotators. This is an important finding for the development of future monitoring legislation for these areas. When and if commercial exploitation of these marine resources commences, robust and verifiable standards which incorporate developing technological advances in camera-based monitoring surveys should be key to developing appropriate management regulations for these regions.

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First insights into the phylogeny of deep-sea glass sponges (Hexactinellida) from polymetallic nodule fields in the Clarion-Clipperton Fracture Zone (CCFZ), northeastern Pacific

Cited by 11 publications

References 31 publications

A new species of Caulophacus (Hexactinellida: Lyssacinosida: Rossellidae) from the western Pacific Ocean, with new insights into the mitochondrial genome characteristics of hexactinellid sponges

A new species of Caulophacus (Hexactinellida: Lyssacinosida: Rossellidae) from the western Pacific Ocean, with new insights into the mitochondrial genome characteristics of hexactinellid sponges

Phylogeny of two new pheronematid sponges from the Caroline Seamount and South China Sea

Megafauna community assessment of polymetallic-nodule fields with cameras: platform and methodology comparison

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