Unrecognized diversity of a scale worm, <i>Polyeunoa laevis</i> (Annelida: Polynoidae), that feeds on soft coral

Bogantes, Viktoria E.; Whelan, Nathan V.; Webster, Katelynn; Mahon, Andrew R.; Halanych, Kenneth M.

doi:10.1111/zsc.12400

Cited by 4 publications

(7 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We find conserved gene orders in scale worms from both anchialine caves and the midwater despite both habitats subjecting inhabitants to strong environmentally driven selective pressure, as shown by their behavioural shifts and morphological transformations (Fig. 3 a–d) 36 – 39 . Zhang et al 25 found significant differences between shallow- and deep-living polynoids, indicating purifying selection.…”

Section: Discussionmentioning

confidence: 90%

Morphological convergence and adaptation in cave and pelagic scale worms (Polynoidae, Annelida)

Gonzalez

Martínez

Worsaae

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Across Annelida, accessing the water column drives morphological and lifestyle modifications—yet in the primarily “benthic” scale worms, the ecological significance of swimming has largely been ignored. We investigated genetic, morphological and behavioural adaptations associated with swimming across Polynoidae, using mitogenomics and comparative methods. Mitochondrial genomes from cave and pelagic polynoids were highly similar, with non-significant rearrangements only present in cave Gesiella. Gene orders of the new mitogenomes were highly similar to shallow water species, suggestive of an underlying polynoid ground pattern. Being the first phylogenetic analyses to include the holopelagic Drieschia, we recovered this species nested among shallow water terminals, suggesting a shallow water ancestry. Based on these results, our phylogenetic reconstructions showed that swimming evolved independently three times in Polynoidae, involving convergent adaptations in morphology and motility patterns across the deep sea (Branchipolynoe), midwater (Drieschia) and anchialine caves (Pelagomacellicephala and Gesiella). Phylogenetic generalized least-squares (PGLS) analyses showed that holopelagic and anchialine cave species exhibit hypertrophy of the dorsal cirri, yet, these morphological modifications are achieved along different evolutionary pathways, i.e., elongation of the cirrophore versus style. Together, these findings suggest that a water column lifestyle elicits similar morphological adaptations, favouring bodies designed for drifting and sensing.

show abstract

Section: Discussionmentioning

confidence: 90%

Morphological convergence and adaptation in cave and pelagic scale worms (Polynoidae, Annelida)

Gonzalez

Martínez

Worsaae

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Polyeunoa laevis was obtained from various localities, including Adélie Land, Peninsula and Ross Sea continental regions, as well as from Kerguelen. Sequences from the Amundsen Sea, Argentinean seamounts, Indian Ocean, and New Zealand (Brasier et al, 2017 ; Bogantes et al, 2020 ; Serpetti et al, 2017 ; Schiaparelli unpublished, see Table A2 ) were also added to this analysis. The length of the alignment was 658‐bp, of which 103 sites were phylogenetically informative.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, cluster 2 identifies shared haplotypes between the Kerguelen archipelago and Argentinean seamounts, suggesting a possible transport of this lineage from east toward Kerguelen, following the APF. Tracing the complex history of P. laevis outside the Antarctic continent will require additional sequences from seamounts south and north of the APF, particularly near South America and other sub‐Antarctic archipelagos such as Prince Edward Island where the P. laevis holotype has been described (Bogantes et al, 2020 ). Southern Indian Ocean sequences provided by (Serpetti et al, 2017 ) have helped to reveal a group of haplotypes shared with samples from Kerguelen and uncovered two other genetically distinct individuals separated by 9 mutational steps (cluster 2, Figure 6 ).…”

Section: Discussionmentioning

confidence: 99%

“…To aid in the phylogenetic reconstructions, the determination of species geographic range and diversity at each location, additional polynoid Cox1 sequences were obtained from GenBank, including those originating from individuals taken from the Amundsen Sea continental region ( n = 12, Brasier et al, 2017 ). For Polyeunoa laevis (McIntosh, 1885 ) specifically, additional sequences were obtained from the Amundsen Sea ( n = 43, Bogantes et al, 2020 ), the Ross Sea ( n = 2, Gallego et al, 2014 ; n = 21, Bogantes et al, 2020 ), the Peninsula ( n = 45, Bogantes et al, 2020 ), the Indian Ocean ( n = 4, Serpetti et al, 2017 ), Argentinean seamounts ( n = 5, Bogantes et al, 2020 ), and New Zealand Macquarie Ridge ( n = 7, Schiaparelli unpublished) ( see Table A2 ). Sequence alignments were performed with the aid of Seaview v.4 (Gouy et al, 2010 ).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach

Cowart

Schiaparelli

Alvaro

et al. 2022

Ecology and Evolution

View full text Add to dashboard Cite

The Antarctic marine environment hosts diversified and highly endemic benthos owing to its unique geologic and climatic history. Current warming trends have increased the urgency of understanding Antarctic species history to predict how environmental changes will impact ecosystem functioning. Antarctic benthic lineages have traditionally been examined under three hypotheses: (1) high endemism and local radiation, (2) emergence of deep‐sea taxa through thermohaline circulation, and (3) species migrations across the Polar Front. In this study, we investigated which hypotheses best describe benthic invertebrate origins by examining Antarctic scale worms (Polynoidae). We amassed 691 polynoid sequences from the Southern Ocean and neighboring areas: the Kerguelen and Tierra del Fuego (South America) archipelagos, the Indian Ocean, and waters around New Zealand. We performed phylogenetic reconstructions to identify lineages across geographic regions, aided by mitochondrial markers cytochrome c oxidase subunit I (Cox1) and 16S ribosomal RNA (16S). Additionally, we produced haplotype networks at the species scale to examine genetic diversity, biogeographic separations, and past demography. The Cox1 dataset provided the most illuminating insights into the evolution of polynoids, with a total of 36 lineages identified. Eunoe sp. was present at Tierra del Fuego and Kerguelen, in favor of the latter acting as a migration crossroads. Harmothoe fuligineum , widespread around the Antarctic continent, was also present but isolated at Kerguelen, possibly resulting from historical freeze–thaw cycles. The genus Polyeunoa appears to have diversified prior to colonizing the continent, leading to the co‐occurrence of at least three cryptic species around the Southern and Indian Oceans. Analyses identified that nearly all populations are presently expanding following a bottleneck event, possibly caused by habitat reduction from the last glacial episodes. Findings support multiple origins for contemporary Antarctic polynoids, and some species investigated here provide information on ancestral scenarios of (re)colonization. First, it is apparent that species collected from the Antarctic continent are endemic, as the absence of closely related species in the Kerguelen and Tierra del Fuego datasets for most lineages argues in favor of Hypothesis 1 of local origin. Next, Eunoe sp. and H. fuligineum , however, support the possibility of Kerguelen and other sub‐Antarctic islands acting as a crossroads for larvae of some species, in support of Hypothesis 3. Finally, the genus Polyeunoa , conversely, is found at depths greater than 150 m and may have a deep origin, in line with Hypothesis 2. These “non endemic” groups, nevertheless, have a distribution that is either north or south of the Antarctic Polar Front, indicating that there is still a barrier to dispersal, even in the deep se...

show abstract

“…In 2016, DNA barcoding of 16 Antarctic polychete morphospecies found evidence of cryptic diversity in over half the morphospecies examined, including taxa identified in the present study, such as Aglaophamus trissophyllus and Maldane sarsi (Brasier et al, 2016), suggesting that assessment based on morphology alone may significantly underestimate true species diversity. More recently, evidence of cryptic diversity has been found in Southern Ocean lineages of the polynoid Polyeunoa laevis (Bogantes et al, 2020), a taxon also present in the JR17003a samples.…”

Section: Morphological Limitations and Future Molecular Workmentioning

confidence: 97%

Annelid Fauna of the Prince Gustav Channel, a Previously Ice-Covered Seaway on the Northeastern Antarctic Peninsula

et al. 2021

View full text Add to dashboard Cite

The Prince Gustav Channel is a narrow seaway located in the western Weddell Sea on the northeastern-most tip of the Antarctic Peninsula. The channel is notable for both its deep (>1200 m) basins, and a dynamic glacial history that most recently includes the break-up of the Prince Gustav Ice Shelf, which covered the southern portion of the channel until its collapse in 1995. However, the channel remains mostly unsampled, with very little known about its benthic biology. We present a preliminary account of the benthic annelid fauna of the Prince Gustav Channel in addition to samples from Duse Bay, a sheltered, glacier-influenced embayment in the northwestern portion of the channel. Samples were collected using an Agassiz Trawl, targeting megafaunal and large macrofaunal sized animals at depths ranging between 200–1200 m; the seafloor and associated fauna were also documented in situ using a Shallow Underwater Camera System (SUCS). Sample sites varied in terms of depth, substrate type, and current regime, and communities were locally variable across sites in terms of richness, abundance, and both taxonomic and functional composition. The most diverse family included the motile predator/scavenger Polynoidae, with 105 individuals in at least 12 morphospecies, primarily from a single site. This study provides first insights into diverse and spatially heterogeneous benthic communities in a dynamic habitat with continuing glacial influence, filling sampling gaps in a poorly studied region of the Southern Ocean at direct risk from climate change. These specimens will also be utilized in future molecular investigations, both in terms of describing the genetic biodiversity of this site and as part of wider phylogeographic and population genetic analyses assessing the connectivity, evolutionary origins, and demographic history of annelid fauna in the region.

show abstract

Unrecognized diversity of a scale worm, Polyeunoa laevis (Annelida: Polynoidae), that feeds on soft coral

Cited by 4 publications

References 69 publications

Morphological convergence and adaptation in cave and pelagic scale worms (Polynoidae, Annelida)

Morphological convergence and adaptation in cave and pelagic scale worms (Polynoidae, Annelida)

Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach

Annelid Fauna of the Prince Gustav Channel, a Previously Ice-Covered Seaway on the Northeastern Antarctic Peninsula

Contact Info

Product

Resources

About