5. Kinorhyncha (= Echinodera)

Neuhaus, Birger

doi:10.1515/9783110272536.181

Cited by 41 publications

(74 citation statements)

References 99 publications

(519 reference statements)

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“…Species of Echinoderes have traditionally been distinguished from other genera of Echinoderidae by the composition of segment 2 being formed by a completely closed cuticular ring (e.g., Higgins 1983;Neuhaus 2013;Sørensen et al 2015). However, it has since been established that some species, e.g., E. aureus Adrianov, Murakami & Shirayama, 2002, actually show a partially developed midventral intracuticular fissure in segment 2 (Adrianov et al 2002).…”

Section: Remarks On the Composition Of Segmentmentioning

confidence: 99%

Redescription of Echinoderes levanderi Karling, 1954 (Kinorhyncha: Cyclorhagida) – a kinorhynch tolerant to very low salinities

Sørensen

2018

EJT

761

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Abstract. The kinorhynch species Echinoderes levanderi Karling, 1954 is redescribed. The species can now be recognized by the presence of spines in middorsal positions on segments 4-8, and in lateroventral positions on segments 6-9, with lateroventral spines on segment 9 showing sexual dimorphism; tubes in subdorsal and ventrolateral positions on segment 2, in sublateral positions on segments 4 and 8, in lateroventral positions on segment 5, and in laterodorsal positions on segment 10. Furthermore, the enlarged sieve plates on segment 9 make the species highly characteristic. New records of the species extend its distributional range into the Bothnian Bay where the bottom water salinity drops below 5 ppt, which is the lowest salinity recorded for a habitat with kinorhynchs.

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Section: Remarks On the Composition Of Segmentmentioning

confidence: 99%

Redescription of Echinoderes levanderi Karling, 1954 (Kinorhyncha: Cyclorhagida) – a kinorhynch tolerant to very low salinities

Sørensen

2018

EJT

761

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“…Both regard sexually dimorphic characters, namely the extraordinary short lateral terminal accessory spines in females, and the significant difference in length of lateral terminal spines between males and females. The easy way to discriminate the sexes among species of Echinoderes is to look for the presence of either penile spines, present in males only, or for lateral terminal accessory spines that are restricted to females (see, e.g., Sørensen & Pardos 2008;Neuhaus 2013). In E. lusitanicus sp.…”

Section: Differential Diagnosismentioning

confidence: 99%

“…The phylum Kinorhyncha is a group of meiobenthic animals of microscopic size (less than 1 mm in length) that is found exclusively in marine, brackish or estuarine realms (Higgins 1988;Sørensen & Pardos 2008;Neuhaus 2013). These animals live in sediments such as sand, shell gravel and mud, from coarse to fine granulometry.…”

Section: Introductionmentioning

confidence: 99%

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First account on kinorhynchs from Portugal, with the description of two new species: Echinoderes lusitanicus sp. nov. and E. reicherti sp. nov.

Neves

Sørensen

Herranz

2016

Marine Biology Research

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The first exploration of the kinorhynch meiofauna in Portuguese marine waters has revealed the existence of two undescribed species of the cyclorhagid genus Echinoderes. In the present contribution we describe Echinoderes lusitanicus sp. nov. and Echinoderes reicherti sp. nov., both collected from subtidal regions of the coast of Algarve in the southernmost region of Portugal. Echinoderes lusitanicus sp. nov. is recognized by the presence of tubes on segment 2 in subdorsal and ventrolateral positions, on segment 5 in lateroventral positions, on segment 8 in lateral accessory positions, and on segment 10 in laterodorsal positions. Spines are present in middorsal position on segments 4 to 8, and in lateroventral positions on segments 8 and 9. The females have minute lateral terminal accessory spines. The second species, E. reicherti sp. nov., is characterized by tubes on segment 2 in subdorsal and ventrolateral positions, on segment 5 in lateroventral positions, and segment 8 in sublateral positions. In addition, the species possesses acicular spines in the middorsal position on segment 4, and in lateroventral positions on segments 6 to 9. Morphological aspects such as tube/spine pattern of the trunk or sexually dimorphic traits are discussed and compared with other Echinoderes species showing close resemblance.http://zoobank.org/urn:lsid:zoobank.org:pub:79C25EEE-9064-46F8-95E2-EE493DC82185 ARTICLE HISTORY

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“…They have been known since 1851, but knowledge about their diversity is still incomplete (Dujardin 1851;Neuhaus 2013). The current number of 217 valid described species (based on description of adult specimens) is expected to increase substantially by intensified research efforts (Sørensen 2013).…”

Section: Introductionmentioning

confidence: 99%

Zelinkaderes yong sp. nov. from Korea - the first recording of Zelinkaderes (Kinorhyncha: Cyclorhagida) in Asia

et al. 2015

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Background: A new kinorhynch species, Zelinkaderes yong sp. nov., is described from Korea.Results: Zelinkaderes yong sp. nov. is described from coastal, sandy habitats in Korea by means of light and scanning electron microscopic techniques. The new species is characterized by the presence of cuspidate spines in lateroventral positions on segments 2 and 9, ventrolateral positions on segment 5, and lateral accessory positions on segment 8; flexible tiny acicular spines in lateroventral positions on segment 2, more regular-sized lateroventral acicular spines on segment 8, and middorsal spines on segments 4, 6, 8, 9, and 11. Females furthermore have acicular spines in middorsal and midlateral positions on segment 10, whereas males have crenulated spines on this segment. The absence of acicular spines in the lateral series of segment 9 makes it easy to distinguish the new species from all previously described congeners. The new species differs most from Zelinkaderes submersus, whereas it is morphologically closest to Zelinkaderes klepali. In regard to the spine patterns, the new species only differs from Z. klepali by its lack of lateroventral acicular spines on segment 9. Conclusions: The finding of a new species of Zelinkaderes in East Asia extends the distributional range of the genus, which suggests that the genus basically could be present anywhere in the world and could be considered as cosmopolitan.

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5. Kinorhyncha (= Echinodera)

Cited by 41 publications

References 99 publications

Redescription of Echinoderes levanderi Karling, 1954 (Kinorhyncha: Cyclorhagida) – a kinorhynch tolerant to very low salinities

Redescription of Echinoderes levanderi Karling, 1954 (Kinorhyncha: Cyclorhagida) – a kinorhynch tolerant to very low salinities

First account on kinorhynchs from Portugal, with the description of two new species: Echinoderes lusitanicus sp. nov. and E. reicherti sp. nov.

Zelinkaderes yong sp. nov. from Korea - the first recording of Zelinkaderes (Kinorhyncha: Cyclorhagida) in Asia

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