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<p>A new amphimictic species <italic>Oscheius indicus</italic> n. sp. is described and illustrated with morphological and molecular data. The species is characterized by a medium-sized and slender body (female: L = 1.1 to 1.5 mm; a = 16.8 to 20.6; b = 5.7 to 7.1; c = 7.5 to 10.4; c’ = 5.0 to 7.6; V = 45 to 51%), presence of four incisures each in the lateral fields with three minute warts, long rectum (2 to 3 anal body diameters), nine pairs of papillae arranged as 1+1+1/3+3 pattern, a prominent double-flapped epipytigma on vulval opening, presence of open leptoderan bursa and crochet needle-shaped spicules place it in the insectivora group. Morphologically, <italic>O. indicus</italic> n. sp. closely resembles <italic>O. carolinensis</italic>, <italic>O. chongmingensis</italic>, <italic>O. colombiana</italic>, and <italic>O. nadarajani</italic>. Molecular phylogenetic analysis carried out using ITS and D2/D3 expansion region of 28S rDNA sequences suggests that <italic>O. indicus</italic> n. sp. is closer to <italic>O. chongmingensis</italic> and <italic>O. rugaonensis</italic>. In summary, the morphometrical data, morphological observations and molecular phylogenetic analysis suggested that <italic>O. indicus</italic> n. sp. is sufficiently different from any known species and is therefore proposed as a new species within the insectivora group.</p>
</abstract>

A new amphimictic species Oscheius indicus n. sp. is described and illustrated with morphological and molecular data. The species is characterized by a medium-sized and slender body (female: L = 1.1 to 1.5 mm; a = 16.8 to 20.6; b = 5.7 to 7.1; c = 7.5 to 10.4; c’ = 5.0 to 7.6; V = 45 to 51%), presence of four incisures each in the lateral fields with three minute warts, long rectum (2 to 3 anal body diameters), nine pairs of papillae arranged as 1+1+1/3+3 pattern, a prominent double-flapped epipytigma on vulval opening, presence of open leptoderan bursa and crochet needle-shaped spicules place it in the insectivora group. Morphologically, O. indicus n. sp. closely resembles O. carolinensis, O. chongmingensis, O. colombiana, and O. nadarajani. Molecular phylogenetic analysis carried out using ITS and D2/D3 expansion region of 28S rDNA sequences suggests that O. indicus n. sp. is closer to O. chongmingensis and O. rugaonensis. In summary, the morphometrical data, morphological observations and molecular phylogenetic analysis suggested that O. indicus n. sp. is sufficiently different from any known species and is therefore proposed as a new species within the insectivora group.

Description of <italic>Oscheius indicus</italic> n. sp. (Rhabditidae: Nematoda) from India

Journal of Nematology

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

Description of  n. sp. (Rhabditidae: Nematoda) from India

running-head

A new amphimictic species Oscheius indicus n. sp. is described and illustrated with morphological and molecular data. The species is characterized by a...

Description of Oscheius indicus n. sp. (Rhabditidae: Nematoda) from India

Article Category: Arts & Humanities

Published Online: Apr 02, 2019

Page range: 1 - 11

Received: Sep 03, 2018

DOI: https://doi.org/10.21307/jofnem-2019-004

© 2019 Puneet Kumar et al., published by Sciendo

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