Morphology and molecular phylogeny of two new species in genus Freyastera (Asteroidea: Brisingida: Freyellidae), with a revised key to close species and ecological remarks

Zhang, Ruiyan; Wang, Chunsheng; Zhou, Yadong; Zhang, Haibin

doi:10.1016/j.dsr.2019.103163

Cited by 13 publications

(10 citation statements)

References 30 publications

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“…5 and the nodes marked by black dots are support by both Bayes tree and ML tree. This tree is overall in line with results of the previous studies (Mah & Foltz, 2011;Zhang et al, 2019). Remarks for A. patricki sp.…”

Section: Systematicssupporting

confidence: 92%

“…DNA extraction method, primer sequences and PCR programs were as in Zhang et al (2017); Zhang et al (2019). Five barcoding genes of each specimen, COI (cytochrome oxidase subregion I), 16S rDNA, 18S rDNA, 12S rDNA and H3, were acquired and the sequences were deposited in GenBank database (see Table S1 for accession numbers).…”

Section: Dna Extraction Sequencing and Phylogenetic Analysismentioning

confidence: 99%

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A new sponge-associated starfish, Astrolirus patricki sp. nov. (Asteroidea: Brisingida: Brisingidae), from the northwestern Pacific seamounts

Zhang

Zhou

Xiao

et al. 2020

PeerJ

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426

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Seamounts are important deep ocean entities that serve as reservoirs for varied types of habitats and fauna. During the Chinese cruises in the northwestern Pacific seamount areas, a new starfish species of order Brisingida, Astrolirus patricki, was found at 1,458–2,125 m depth. All specimens of the new species were observed in situ attaching on hexactinellid sponges, suggesting a possible close relationship between the two taxa. A. patricki sp. nov. is the second known species of the genus, characterized by the abutting plates in the intercostal integument, separated first pair of adambulacral plates and densely distributed proximal spines. Phylogenetic analyses were conducted for order Brisingida to incorporate the new species as well as Hymenodiscus cf. fragilis (Fisher, 1906), Freyella cf. attenuata Sladen, 1889 and two Brisinga spp., for which we present the molecular data for the first time. Phylogenetic trees suggest a close relationship between A. patricki sp. nov. with Brisinga species rather than with Hymenodiscus species, which is inconsistent with morphological taxonomy. This study highlights the distinct morphological and ecological characters of the new species and provides new data for future investigation on Brisingida phylogeny.

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Section: Systematicssupporting

confidence: 92%

Section: Dna Extraction Sequencing and Phylogenetic Analysismentioning

confidence: 99%

A new sponge-associated starfish, Astrolirus patricki sp. nov. (Asteroidea: Brisingida: Brisingidae), from the northwestern Pacific seamounts

Zhang

Zhou

Xiao

et al. 2020

PeerJ

Self Cite

426

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“…In the Yap Trench, twenty-one species from hadal zone were reviewed and summarized (Belyaev, 1989;Jamieson, 2015), and three more species were recently reported (Zhang et al, 2017(Zhang et al, , 2019Wang et al, 2018). Fauna knowledge from previous research were mostly based on trawling specimens, among which small epibenthic animals with weak mobility were dominant.…”

Section: Hadal Fauna In the Yap Trenchmentioning

confidence: 99%

Megafaunal Community Structure From the Abyssal to Hadal Zone in the Yap Trench

et al. 2021

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Hadal trenches remain one of the unexplored ocean ecosystems due to the challenges of sampling at great depths. It is still unclear how a faunal community changes from the abyssal to the hadal zone, and which environmental variables are the key impacting factors. In this study, nine dives of the Human Occupied Vehicle (HOV) “JIAOLONG” were conducted from abyssal to hadal depths (4,435–6,796 m) in the Yap Trench on the southeastern boundary of the Philippine Sea Plate in the western Pacific, divided into 48,200 m video transects, to describe the megafaunal communities and reveal their relationship with environmental factors. A total of 1,171 megafauna organisms was recorded, 80 morphospecies (msps) from 8 phyla were identified based on the video data, most of which were reported for the first time in the Yap Trench. Arthropoda was the most abundant phylum and Echinodermata was the most diverse phylum of the megafaunal community. The faunal abundance increased with depth, whereas the Shannon diversity index decreased with depth. Cluster analysis suggested seven assemblages, with five abyssal groups, one mixed group, and one hadal dominant group. Although megafaunal communities changed gradually from abyssal zone to hadal zone, both PERMANOVA and PERMDISP analyses revealed that the communities are significantly different between abyssal zone and hadal zone, indicating 6,000 m as the boundary between the two depth zones. Depth, substrate, slope, and latitude were identified as four important environmental factors with significant influence on megafaunal community structure. This study proposed a transition pattern from the abyssal to hadal zone in the Yap Trench, highlighted the importance of habitat heterogeneity in structuring megafaunal community in a hadal trench.

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“…Paratype MBM286625 is deposited in the Marine Biological Museum (MBM), Institute of Oceanology of the Chinese Academy of Sciences (IOCAS), Qingdao, China. DNA extraction, sequencing and phylogenetic analysis DNA extraction method, primer sequences and PCR programs were as in Zhang et al (2017) and Zhang et al (2019). Five barcoding genes of each specimen, COI (cytochrome oxidase subregion I), 16S rDNA, 18S rDNA, 12S rDNA and H3, were acquired and the sequences were deposited in GenBank database (see Table S1 for accession numbers).…”

Section: Sample Collection and Examinationmentioning

confidence: 99%

Peer Review #1 of "A new sponge-associated starfish, Astrolirus patricki sp. nov. (Asteroidea: Brisingida: Brisingidae), from the northwestern Pacific seamounts (v0.1)"

Mah¹

2020

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Seamounts are important deep ocean entities that serve as reservoirs for varied types of habitats and fauna. During the Chinese cruises in the northwestern Pacific seamount areas, a new starfish species of order Brisingida, Astrolirus patricki sp. nov., was found at 1458-2125 m depth. All specimens of the new species were observed in situ attaching on hexactinellid sponges, suggesting a possible close relationship between the two taxa. A. patricki sp. nov. is the second known species of the genus, characterized by the abutting plates in the intercostal integument, separated first pair of adambulacral plates and densely distributed proximal spines. Phylogenetic analyses were conducted for order Brisingida to incorporate the new species as well as Hymenodiscus cf. fragilis (Fisher, 1906), Freyella cf. attenuata Sladen, 1889 and two Brisinga spp. , for which we present the molecular data for the first time. Phylogenetic trees suggest a close relationship between A. patricki sp. nov. with Brisinga species rather than with Hymenodiscus species, which is inconsistent with morphological taxonomy. This study highlights the distinct morphological and ecological characters of the new species and provides new data for future investigation on Brisingida phylogeny.

show abstract

Morphology and molecular phylogeny of two new species in genus Freyastera (Asteroidea: Brisingida: Freyellidae), with a revised key to close species and ecological remarks

Cited by 13 publications

References 30 publications

A new sponge-associated starfish, Astrolirus patricki sp. nov. (Asteroidea: Brisingida: Brisingidae), from the northwestern Pacific seamounts

A new sponge-associated starfish, Astrolirus patricki sp. nov. (Asteroidea: Brisingida: Brisingidae), from the northwestern Pacific seamounts

Megafaunal Community Structure From the Abyssal to Hadal Zone in the Yap Trench

Peer Review #1 of "A new sponge-associated starfish, Astrolirus patricki sp. nov. (Asteroidea: Brisingida: Brisingidae), from the northwestern Pacific seamounts (v0.1)"

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