Pycnophyes abyssorum sp. n. (Kinorhyncha: Homalorhagida), the deepest kinorhynch species described so far

Adrianov, Andrey V.; Maiorova, Anastassya S.

doi:10.1016/j.dsr2.2014.08.009

Cited by 23 publications

(15 citation statements)

References 12 publications

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“…All species in the clade “ Crista‐phyes ” ( Cristaphyes abyssorum comb. nov. (Adrianov and Maiorova, ), C. anomalus comb. nov. (Lang, ), C. arctous comb.…”

Section: Discussionmentioning

confidence: 99%

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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“…All species in the clade “ Crista‐phyes ” ( Cristaphyes abyssorum comb. nov. (Adrianov and Maiorova, ), C. anomalus comb. nov. (Lang, ), C. arctous comb.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2016

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“…Kinorhynchs are meiofaunal organisms, occurring in a wide spectrum of marine habitats all over the world, from the shallow waters to the abyssal depths (e.g., Sørensen 2008;Neuhaus 2013;Herranz et al 2014;Adrianov and Maiorova 2015;Yamasaki 2016a). Although their presence is frequently reported in a number of ecological meiofaunal studies, knowledge on their taxonomic composition and distribution is rather limited, since kinorhynch specimens are usually not identified to genus or species level.…”

Section: Introductionmentioning

confidence: 99%

Diversity and distribution of Arctic Echinoderes species (Kinorhyncha: Cyclorhagida), with the description of one new species and a redescription of E. arlis Higgins, 1966

Grzelak

Sørensen

2018

Mar Biodiv

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The kinorhynch fauna from Svalbard and the Arctic Ocean north of Svalbard was explored, and a total of nine species of Echinoderes was identified. Two species were new to science, and one, Echinoderes balerioni sp. nov., is described. Echinoderes balerioni sp. nov. is characterized by the presence of short middorsal spines on segments 4, 6, and 8, and in lateroventral positions on segments 6 to 9. Tubes are present in laterodorsal, sublateral, and ventrolateral positions on segment 2, lateroventral positions on segment 5, and lateral accessory positions on segment 8, and tergal extensions conspicuously long and spiniform. The collected material also offered the first chance to examine specimens of Echinoderes arlis with scanning electron microscopy, which prompted a redescription of the species. The recorded species are compared with all other known records of Echinoderes in the Arctic region, and the summarized data suggests that at least some species show a circumpolar distribution.

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“…The six remaining species with lateral terminal spines, and conspicuously projecting middorsal process of segment 10 include: C. arctous , C. chukchiensis , C. cristatus ( Sánchez et al, 2013 ), C. furugelmi (Adrianov, 1999 in Adrianov & Malakhov, 1999 ), C. nubilis ( Sánchez, Pardos & Sørensen, 2014 ), and C. abyssorum ( Adrianov & Maiorova, 2015 ) (see Higgins, 1991 ; Adrianov & Malakhov, 1999 ; Sánchez et al, 2013 ; Sánchez, Pardos & Sørensen, 2014 ; Adrianov & Maiorova, 2015 ). C. dordaidelosensis sp.…”

Section: Systematic Accountmentioning

confidence: 99%

New mud dragons from Svalbard: three new species ofCristaphyesand the first Arctic species ofPycnophyes(Kinorhyncha: Allomalorhagida: Pycnophyidae)

Sørensen

Grzelak

2018

PeerJ

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BackgroundKinorhynchs are marine, microscopic invertebrates inhabiting the seafloors. Their segmented trunk equipped with spines and processes has inspired scientists to give them the common name “mud dragons.” Even though kinorhynchs have been known since the 19th century, less than 300 species are known to science, and it is still considered a largely understudied animal group—in particular in the Arctic, from which only 23 species are known so far.MethodsSamples were collected at eight stations around Svalbard and in the fjords of Spitsbergen. Meiofauna was extracted from the sediment cores with LUDOX centrifugation method, and kinorhynchs were picked up and mounted for light- and scanning electron microscopy.ResultsFour new species of the kinorhynch family Pycnophyidae are described from Svalbard: Cristaphyes dordaidelosensis sp. nov., C. glaurung sp. nov., C. scatha sp. nov., and Pycnophyes ancalagon sp. nov. The new species are generally recognized by their distribution of setae along the trunk segments.DiscussionAfter the discovery of the new species, Pycnophyidae becomes with 14 species the most diverse kinorhynch genus in the Arctic, closely followed by Echinoderidae with 13 species. So far, these are the only kinorhynch families with an Arctic distribution.

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Pycnophyes abyssorum sp. n. (Kinorhyncha: Homalorhagida), the deepest kinorhynch species described so far

Cited by 23 publications

References 12 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)

Diversity and distribution of Arctic Echinoderes species (Kinorhyncha: Cyclorhagida), with the description of one new species and a redescription of E. arlis Higgins, 1966

New mud dragons from Svalbard: three new species ofCristaphyesand the first Arctic species ofPycnophyes(Kinorhyncha: Allomalorhagida: Pycnophyidae)

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