Condyloderes kurilensis sp. nov. (Kinorhyncha: Cyclorhagida)—a new deep water species from the abyssal plain near the Kuril-Kamchatka Trench

Adrianov, Andrey V.; Maiorova, Anastassya S.

doi:10.1134/s1063074016010028

Cited by 19 publications

(32 citation statements)

References 7 publications

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“…Actually, the degree of variation reached would have normally allowed the erection of more than a single new species. The new taxon also exhibited female-specific characters in line with those recently described for C. kurilensis (Adrianov & Maiorova 2016). Furthermore, numerous specimens of some undescribed congeneric species from different areas of the world which we had the opportunity to examine (information on part of this material is reported by: Sørensen et al 2012a: East China Sea; Neuhaus 2013: East Pacific; Dal Zotto & Todaro 2016: Mediterranean Sea; Yamasaki 2017: Japanese waters; Dal Zotto, Neuhaus & Yamasaki, unpubl.…”

Section: Introductionsupporting

confidence: 81%

“…Higgins, 1969 Included species. Condyloderes kurilensis Adrianov & Maiorova, 2016;C. multispinosus (McIntyre, 1962) Higgins, 1969C.…”

Section: Methodsmentioning

confidence: 99%

“…A type-6 sensory spot occurs ventromedially on segment 1 (slightly more paraventrally) and on segments 2, 4, 6, 8 and 9, lateroventrally on segment 10, sublaterally on segments 3, 5-7 and 9, midlaterally on segments 1 and 2, laterodorsally on segments 2, 3 and 7-9, subdorsally on segment 10, and paradorsally on segments 1 (almost subdorsally), 46, 8 and 9 (Figs 4-7; Tables 2, 7). The sublateral sensory spot on segment 1 could not be observed in the holotypic male and on segments 1 and 3 and in the paratypic female, but they are very likely to occur based on the documentation of the spots in the non-type male in the original publication (Adrianov & Maiorova 2016); therefore, these spots are indicated by dotted lines in Figures 4 and 5.…”

Section: Descriptionmentioning

confidence: 98%

“…The authors state that the female reveals more sensory spots in a slightly different arrangement than the male (Adrianov & Maiorova 2016, p. 18) but this is not corroborated by our study. According to their illustration of the paratypic female mounted for light microscopy (Adrianov & Maiorova 2016, fig. 2) and of the female SEM specimen (Adrianov & Maiorova 2016, fig.…”

Section: Comparison With Previous Descriptionmentioning

confidence: 99%

“…More recently, C. setoensis Adrianov, Murakami & Shirayama, 2002 was described from Honshu Island (Adrianov et al 2002) and C. storchi Higgins, 2004in Martorelli & Higgins 2004 was recovered and described from the stomach of the shrimp Pleoticus muelleri (Bate, 1888) found off the coast of Patagonia (Martorelli & Higgins 2004). The latest two known species are C. megastigma Sørensen, Rho & Kim, 2010, occurring in the Korea Strait (Sørensen et al 2010b) and C. kurilensis Adrianov & Maiorova, 2016 discovered at abyssal depths near the Kuril-Kamchatka Trench (Adrianov & Maiorova 2016).…”

Section: Introductionmentioning

confidence: 99%

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Revision of Condyloderes (Kinorhyncha, Cyclorhagida) including description of Condyloderes shirleyi sp. nov.

Neuhaus¹,

Zotto²,

Yamasaki³

et al. 2019

Zootaxa

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The description of a new representative of the species-poor genus Condyloderes Higgins, 1969 from the Northeast Pacific (Alaska) is reported. The analyzed specimens of Condyloderes shirleyi sp. nov. showed a significant variation of numerous morphological characters, along with female-specific traits known also from other congeneric species. These findings stimulated the re-investigation of the type material of the six species of Condyloderes described so far, i.e., C. kurilensis Adrianov & Maiorova, 2016, C. megastigma Sørensen, Rho & Kim, 2010b, C. multispinosus (McIntyre, 1962) Higgins, 1969, C. paradoxus Higgins, 1969, C. setoensis Adrianov, Murakami & Shirayama, 2002, and C. storchi Higgins, 2004 in Martorelli & Higgins, 2004. Our study allowed to reveal various morphological novelties and to emend the diagnosis of these species and of the genus Condyloderes. Furthermore, our analysis led to synonymize C. megastigma with C. setoensis. The results of our investigation about the significant variation in C. shirleyi sp. nov. raise a wider question on species identity within Kinorhyncha, underscoring the necessity, if possible, to describe new species from a higher number of specimens and to concentrate on the morphological variation of the going-to-be-described species.

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Section: Introductionsupporting

confidence: 81%

“…Higgins, 1969 Included species. Condyloderes kurilensis Adrianov & Maiorova, 2016;C. multispinosus (McIntyre, 1962) Higgins, 1969C.…”

Section: Methodsmentioning

confidence: 99%

Section: Descriptionmentioning

confidence: 98%

Section: Comparison With Previous Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Revision of Condyloderes (Kinorhyncha, Cyclorhagida) including description of Condyloderes shirleyi sp. nov.

Neuhaus¹,

Zotto²,

Yamasaki³

et al. 2019

Zootaxa

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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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Diversity and distribution of Kinorhyncha in abyssal polymetallic nodule areas of the Clarion-Clipperton Fracture Zone and the Peru Basin, East Pacific Ocean, with the description of three new species and notes on their intraspecific variation

Sánchez¹,

González-Casarrubios²,

Cepeda³

et al. 2022

Mar. Biodivers.

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Polymetallic nodule fields represent a large reservoir of undiscovered biodiversity that becomes particularly evident for meiobenthic organisms, the smallest-sized faunal group. Knowledge gaps are especially noticeable for the generally low-density metazoan groups, such as Kinorhyncha, the so-called mud dragons. Using both morphological and genetic (metabarcoding) approaches, we provide a general overview and comparison of the diversity of kinorhynchs collected during nine sampling campaigns (2016–2019) that targeted abyssal environments in several contract areas for exploration in the Clarion-Clipperton Fracture Zone (CCZ) and in the Peru Basin. Our findings from morphological analyses reveal a highly diverse mud dragon community, with 16 species present in the CCZ. Of these, 12 appear in the German contract area, including three new species described in the present contribution: Echinoderes delaordeni sp. nov., Echinoderes sanctorum sp. nov., and Echinoderes zeppilliae sp. nov. Furthermore, metabarcoding data of the kinorhynch community gathered from the area is provided, together with the geographic distribution of the known species stated per contractor area, including new records and still undescribed species. Most of the identified species in the CCZ seem to have a wide distribution, with Echinoderes sp.4 being the most common and abundant species with a distribution spreading across the CCZ and also present in the Peru Basin. Metabarcoding analyses targeting the V1V2 hypervariable region of the 18S gene from the 253 stations of the CCZ revealed 14 amplicon sequence variants (ASVs) belonging to Kinorhyncha with grade values higher than 98% detected at 15 different stations within six different areas along the CCZ. Concurring with morphology, the family Echinoderidae was the most diverse as the genus Cephalorhyncha had five ASVs, followed by Echinoderes with four ASVs. Semnoderes, however, showed the widest spread ASV, being detected at six stations. In the CCZ, the metabarcoding data showed there were no shared ASVs between the CCZ areas as well as the highest number of uniques, which was 11. Our morphological study showed a low number of specimens inhabiting nodules (surface/crevices), suggesting that specific kinorhynch species do not typically inhabit the nodules in addition to the surrounding sediment.

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Condyloderes kurilensis sp. nov. (Kinorhyncha: Cyclorhagida)—a new deep water species from the abyssal plain near the Kuril-Kamchatka Trench

Cited by 19 publications

References 7 publications

Revision of Condyloderes (Kinorhyncha, Cyclorhagida) including description of Condyloderes shirleyi sp. nov.

Revision of Condyloderes (Kinorhyncha, Cyclorhagida) including description of Condyloderes shirleyi sp. nov.

Characteristics of meiofauna in extreme marine ecosystems: a review

Diversity and distribution of Kinorhyncha in abyssal polymetallic nodule areas of the Clarion-Clipperton Fracture Zone and the Peru Basin, East Pacific Ocean, with the description of three new species and notes on their intraspecific variation

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