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

<p>The tea plant is native to China; the country has the greatest tea production areas in the world. In an attempt to investigate the nematode biodiversity associated with the tea plantations of Hangzhou, Zhejiang Province, a population of stunt nematode was detected. This group of nematodes is comprised of migratory ecto-parasites of roots and can subsist on a variety of host plants. Therefore, the detected population was studied carefully using the integrative taxonomy approach and identified as a new species of genus <italic>Geocenamus</italic>. <italic>Geocenamus chengi</italic> n. sp. can be characterized by females having six incisures in the lateral field; labial region is dome shaped and slightly offset from the rest of the body having four to five annuli; head framework is weakly developed; deirids are absent; excretory pore is located at the anterior region of basal pharyngeal bulb. Under SEM, the vulva is a transverse slit, vulval lips are elongated and ellipsoidal with epiptygma. The tail is annulated, elongated, and conical having bluntly pointed tip and a terminal hyaline region that forms 21 to 33% of the tail length. Spicule is 22 to 25 μm long, gubernaculum is saucer shaped; bursa is crenated covering the tail until the hyaline tail region. Morphologically, the species is close to <italic>G. circellus</italic>, <italic>G. joctus</italic>, <italic>G. loofi</italic>, <italic>G. ordinarius</italic>, <italic>G. processus</italic>, <italic>G. tetyllus</italic>, and <italic>G. tortilis</italic>. Phylogenetic relationships of the new species based on D2-D3 expansion domains of 28 S, ITS, and 18 S rRNA genes indicated that <italic>G. chengi</italic> n. sp. clustered in a separate clade with <italic>G. vietnamensis</italic>.</p>
</abstract>

The tea plant is native to China; the country has the greatest tea production areas in the world. In an attempt to investigate the nematode biodiversity associated with the tea plantations of Hangzhou, Zhejiang Province, a population of stunt nematode was detected. This group of nematodes is comprised of migratory ecto-parasites of roots and can subsist on a variety of host plants. Therefore, the detected population was studied carefully using the integrative taxonomy approach and identified as a new species of genus Geocenamus. Geocenamus chengi n. sp. can be characterized by females having six incisures in the lateral field; labial region is dome shaped and slightly offset from the rest of the body having four to five annuli; head framework is weakly developed; deirids are absent; excretory pore is located at the anterior region of basal pharyngeal bulb. Under SEM, the vulva is a transverse slit, vulval lips are elongated and ellipsoidal with epiptygma. The tail is annulated, elongated, and conical having bluntly pointed tip and a terminal hyaline region that forms 21 to 33% of the tail length. Spicule is 22 to 25 μm long, gubernaculum is saucer shaped; bursa is crenated covering the tail until the hyaline tail region. Morphologically, the species is close to G. circellus, G. joctus, G. loofi, G. ordinarius, G. processus, G. tetyllus, and G. tortilis. Phylogenetic relationships of the new species based on D2-D3 expansion domains of 28 S, ITS, and 18 S rRNA genes indicated that G. chengi n. sp. clustered in a separate clade with G. vietnamensis.

A new stunt nematode, <italic>Geocenamus chengi</italic> n. sp. (Nematoda: Merliniinae) in the rhizosphere of tea (<italic>Camellia sinensis</italic>) from Zhejiang Province, China

Journal of Nematology

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

A new stunt nematode,  n. sp. (Nematoda: Merliniinae) in the rhizosphere of tea () from Zhejiang Province, China

running-head

The tea plant is native to China; the country has the greatest tea production areas in the world. In an attempt to investigate the nematode biodiversity...

A new stunt nematode, Geocenamus chengi n. sp. (Nematoda: Merliniinae) in the rhizosphere of tea (Camellia sinensis) from Zhejiang Province, China

Publié en ligne: 16 avr. 2020

Pages: 1 - 13

Reçu: 02 févr. 2020

DOI: https://doi.org/10.21307/jofnem-2020-042

Mots clés
DNA sequencing, 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 stunt nematode, Geocenamus chengi n. sp. (Nematoda: Merliniinae) in the rhizosphere of tea (Camellia sinensis) from Zhejiang Province, China

Publié en ligne: 16 avr. 2020

Pages: 1 - 13

Reçu: 02 févr. 2020

DOI: https://doi.org/10.21307/jofnem-2020-042

Mots clésDNA sequencing, 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.

Mots clés
DNA sequencing, morphology, morphometrics, nematode, new record, species, phylogeny, scanning electron microscopy