<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The Family Criconematidae is commonly referred as ring nematodes that include some members with economic importance as plant parasites. During a recent nematode inventory survey at Zhejiang Province, China, a new species of genus <italic>Nothocriconemoides</italic> was detected in the rhizosphere of elm tree. <italic>Nothocriconemoides hangzhouensis</italic> n. sp. can be characterized by the female body having annuli with fine longitudinal striations and 2 to 3 anastomoses at the posterior half of the body. The first cephalic annulus is rounded and expanded enclosing the lip region, and the second annulus is narrow, offset, collar like. <italic>En face</italic> view shows a central elevated labial disk bearing four distinct equal-sized submedian lobes and “I” shaped oral aperture. Excretory pore is located 3–4 annuli posterior to esophageal bulb. Vagina is straight and vulva closed. The ventral side of postvulval annuli is inverted, in majority of individuals. Anus is indistinct and located on the next annuli posterior to vulva. Tail is short, conoid, with forked or branched terminus. Juveniles are devoid of collar-shaped annuli in the lip region. The cephalic region has two rounded annuli where the first annulus shows slight depression in the middle. Body annuli are finely crenated. Anus is indistinct and located 3 to 4 annuli from tail terminus. Tail is short ending in a single lobed terminus. Phylogenetic studies based on analysis of the D2–D3 expansion segments of the 28 S rRNA, ITS rRNA, partial 18 S rRNA, and <italic>cox</italic>I gene revealed that the new species formed a separate clade from other criconematid species, thereby supporting its status as a new species of the genus. The new species showed close relationships with <italic>Discocriconemella sinensis</italic>. Additionally, this is the first record of genus <italic>Nothocriconemoides</italic> from China.</p>
</abstract>

The Family Criconematidae is commonly referred as ring nematodes that include some members with economic importance as plant parasites. During a recent nematode inventory survey at Zhejiang Province, China, a new species of genus Nothocriconemoides was detected in the rhizosphere of elm tree. Nothocriconemoides hangzhouensis n. sp. can be characterized by the female body having annuli with fine longitudinal striations and 2 to 3 anastomoses at the posterior half of the body. The first cephalic annulus is rounded and expanded enclosing the lip region, and the second annulus is narrow, offset, collar like. En face view shows a central elevated labial disk bearing four distinct equal-sized submedian lobes and “I” shaped oral aperture. Excretory pore is located 3–4 annuli posterior to esophageal bulb. Vagina is straight and vulva closed. The ventral side of postvulval annuli is inverted, in majority of individuals. Anus is indistinct and located on the next annuli posterior to vulva. Tail is short, conoid, with forked or branched terminus. Juveniles are devoid of collar-shaped annuli in the lip region. The cephalic region has two rounded annuli where the first annulus shows slight depression in the middle. Body annuli are finely crenated. Anus is indistinct and located 3 to 4 annuli from tail terminus. Tail is short ending in a single lobed terminus. Phylogenetic studies based on analysis of the D2–D3 expansion segments of the 28 S rRNA, ITS rRNA, partial 18 S rRNA, and coxI gene revealed that the new species formed a separate clade from other criconematid species, thereby supporting its status as a new species of the genus. The new species showed close relationships with Discocriconemella sinensis. Additionally, this is the first record of genus Nothocriconemoides from China.

A new rare nematode <italic>Nothocriconemoides hangzhouensis</italic> n. sp. (Nematoda: Criconematidae) from Hangzhou, China

Journal of Nematology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A new rare nematode  n. sp. (Nematoda: Criconematidae) from Hangzhou, China

running-head

The Family Criconematidae is commonly referred as ring nematodes that include some members with economic importance as plant parasites. During a recent...

A new rare nematode Nothocriconemoides hangzhouensis n. sp. (Nematoda: Criconematidae) from Hangzhou, China

Published Online: Mar 18, 2020

Page range: 1 - 14

Received: Jan 06, 2020

DOI: https://doi.org/10.21307/jofnem-2020-006

Keywords
DNA sequencing, Elm tree, Morphology, Morphometrics, Nematode, New record, Species, Phylogeny, Scanning electron microscopy.

© 2020 Munawar Maria et al., published by Sciendo.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A new rare nematode Nothocriconemoides hangzhouensis n. sp. (Nematoda: Criconematidae) from Hangzhou, China

Published Online: Mar 18, 2020

Page range: 1 - 14

Received: Jan 06, 2020

DOI: https://doi.org/10.21307/jofnem-2020-006

KeywordsDNA sequencing, Elm tree, Morphology, Morphometrics, Nematode, New record, Species, Phylogeny, Scanning electron microscopy.

© 2020 Munawar Maria et al., published by Sciendo.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
DNA sequencing, Elm tree, Morphology, Morphometrics, Nematode, New record, Species, Phylogeny, Scanning electron microscopy.