Deep-sea Kinorhyncha: two new species from the Guinea Basin, with evaluation of an unusual male feature

Sánchez, Nuria; Pardos, Fernando; Sørensen, Martin V.

doi:10.1007/s13127-014-0182-6

Cited by 16 publications

(22 citation statements)

References 15 publications

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“…Eight species were designated as outgroups: the cyclorhagids Echinoderes rex Lundbye et al., and Echinoderes sensibilis Adrianov et al., , as well as all the described Neocentrophyidae: Mixtophyes abyssalis Sánchez et al., 2014, Neocentrophyes intermedius Higgins, , Neocentrophyes satyai Higgins, , Paracentrophyes anurus Sørensen et al., , Paracentrophyes quadridentatus Zelinka, and Paracentrophyes praedictus Higgins, . Morphological data were coded for all of them whereas molecular sequences were only available for E. rex , E. sensibilis , Paracentrophyes anurus and Paracentrophyes quadridentatus .…”

Section: Methodsmentioning

confidence: 99%

“…Pycnophyidae is the second largest family of Kinorhyncha with one‐third of the all described species. Pycnophyidae includes the genera Pycnophyes , with 56 species, and Kinorhynchus , with 19 species, making them the second and third most diverse genera of the phylum, respectively (Neuhaus, ; Sørensen, ; Sánchez et al., ). Pycnophyidae is defined by the presence of one dorsal (tergal) and three ventral (sternal) plates on segment 1, followed by one tergal and two sternal plates on all subsequent segments.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the increased sampling effort by various researchers, the number of sequenced species of Pycnophyidae is still very low. This is not only due to the inherent difficulties of getting good quality sequences from small animals, but mainly due to the low abundances of many species and the restricted distribution areas of many pycnophyids, which are often exclusively known from single collections, for example in the polar regions, deep‐sea or even in the stomach content of a shrimp (Adrianov and Malakhov, ; Martorelli and Higgins, ; Sánchez et al., , , b).…”

Section: Introductionmentioning

confidence: 99%

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Morphology disentangles the systematics of a ubiquitous but elusive meiofaunal group (Kinorhyncha: Pycnophyidae)

et al. 2016

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Kinorhyncha is a group of benthic, microscopic animals distributed worldwide in marine sediments. The phylum is divided into two classes, Cyclorhagida and Allomalorhagida, congruent with the two major clades recovered in recent phylogenetic analyses. Allomalorhagida accommodates more than one-third of the described species, most of them assigned to the family Pycnophyidae. All previous phylogenetic analyses of the phylum recovered the two genera within Pycnophyidae, Pycnophyes and Kinorhynchus, as paraphyletic and polyphyletic. A major problem in these studies was the lack of molecular data of most pycnophyids, due to the limited and highly localized distribution of most species, often in the Arctic and the deep-sea. We here overcame the problem by adding a morphological partition with data for 79 Pycnophyidae species, 15 of them also represented by molecular data. Model-based analyses yielded seven clades, which each was supported by several morphological apomorphies. Accordingly, Kinorhynchus is synonymized with Pycnophyes and six new genera are described for the remaining recovered clades: Leiocanthus gen. nov., Cristaphyes gen. nov., Higginsium gen. nov., Krakenella gen. nov., Setaphyes gen. nov. and Fujuriphyes gen. nov.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphology disentangles the systematics of a ubiquitous but elusive meiofaunal group (Kinorhyncha: Pycnophyidae)

et al. 2016

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“…Cristaphyes abyssorum (5766 m) and Condyloderes kurilensis (5222 m) from the Kuril-Kamchatka Trench Maiorova 2015, 2016); Cristaphyes nubilis, Krakenella farinellii (Sánchez et al 2014a) and Mixtophyes abyssalis (Sánchez et al 2014b), collected from the Guinea Basin (5136-5174 m), and, finally, Campyloderes cf. vanhöffeni recorded in the Canary Islands (5055, 5102 and 5118 m) and also in the Guinea Basin (5064 m) (Neuhaus and Sørenson 2013).…”

Section: Metazoan Meiofaunamentioning

confidence: 99%

Characteristics of meiofauna in extreme marine ecosystems: a review

et al. 2017

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Extreme marine environments cover more than 50% of the Earth's surface and offer many opportunities for investigating the biological responses and adaptations of organisms to stressful life conditions. Extreme marine environments are sometimes associated with ephemeral and unstable ecosystems, but can host abundant, often endemic and welladapted meiofaunal species. In this review, we present an integrated view of the biodiversity, ecology and physiological responses of marine meiofauna inhabiting several extreme marine environments (mangroves, submarine caves, Polar ecosystems, hypersaline areas, hypoxic/anoxic environments, hydrothermal vents, cold seeps, carcasses/sunken woods, deep-sea canyons, deep hypersaline anoxic basins [DHABs] and hadal zones). Foraminiferans, nematodes and copepods are abundant in almost all of these habitats and are dominant in deep-sea ecosystems. The presence and dominance of some other taxa that are normally less common may be typical of certain extreme conditions. Kinorhynchs are particularly well adapted to cold seeps and other environments that experience drastic changes in salinity, rotifers are well represented in polar ecosystems and loriciferans seem to be the only metazoan able to survive multiple stressors in DHABs. As well as natural processes, human activities may generate stressful conditions, including deoxygenation, acidification and rises in temperature. The behaviour and physiology of different meiofaunal taxa, such as some foraminiferans, nematode and copepod species, can provide vital information on how organisms may respond to these challenges and can provide a warning signal of anthropogenic impacts. From an evolutionary perspective, the discovery of new meiofauna taxa from extreme environments very often sheds light on phylogenetic relationships, while understanding how meiofaunal organisms are able to survive or even flourish in these conditions can explain evolutionary pathways. Finally, there are multiple potential economic benefits to be gained from ecological, biological, physiological and evolutionary studies of meiofauna in extreme environments. Despite all the advantages offered by meiofauna studies from extreme environments, there is still an urgent need to foster meiofauna research in terms of composition, ecology, biology and physiology focusing on extreme environments.

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“…nov.: Cristaphyes cristatus ; Cristaphyes yushini (Adrianov, 1989); Fujuriphyes deirophorus (Higgins, 1983); Higginsium dolichurum (Sánchez et al, 2011); Krakenella argentinensis (Martorelli and Higgins, 2004); Krakenella farinellii (Sánchez et al, 2014a);…”

Section: On Segments 6 8;mentioning

confidence: 99%

Two new Pycnophyidae species (Kinorhyncha: Allomalorhagida) from Japan lacking ventral tubes in males

Sánchez

Yamasaki

2016

Zoologischer Anzeiger - A Journal of Comparative Zoology

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Deep-sea Kinorhyncha: two new species from the Guinea Basin, with evaluation of an unusual male feature

Cited by 16 publications

References 15 publications

Morphology disentangles the systematics of a ubiquitous but elusive meiofaunal group (Kinorhyncha: Pycnophyidae)

Morphology disentangles the systematics of a ubiquitous but elusive meiofaunal group (Kinorhyncha: Pycnophyidae)

Characteristics of meiofauna in extreme marine ecosystems: a review

Two new Pycnophyidae species (Kinorhyncha: Allomalorhagida) from Japan lacking ventral tubes in males

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