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Integrative taxonomy and phylogenetic relationships between representatives of genera within Merliniinae (Nematoda: Merliniidae), with new data on fourteen known and one unknown species

Published online by Cambridge University Press:  30 November 2023

M. Hosseinvand Open the ORCID record for M. Hosseinvand [Opens in a new window] ,
A. Eskandari Open the ORCID record for A. Eskandari [Opens in a new window] ,
K. Azizi ,
J.E. Palomares-Rius Open the ORCID record for J.E. Palomares-Rius [Opens in a new window] ,
P. Castillo Open the ORCID record for P. Castillo [Opens in a new window] ,
J. Abolafia Open the ORCID record for J. Abolafia [Opens in a new window] ,
R. Ghaderi Open the ORCID record for R. Ghaderi [Opens in a new window] ,
J. Helder  and
X. Qing Open the ORCID record for X. Qing [Opens in a new window]
M. Hosseinvand*
Affiliation:
Department of Plant Protection, Faculty of Agriculture, University of Zanjan, 45371-38791, Zanjan, Iran
A. Eskandari*
Affiliation:
Department of Plant Protection, Faculty of Agriculture, University of Zanjan, 45371-38791, Zanjan, Iran
K. Azizi
Affiliation:
Department of Plant Protection, Lorestan University, 68151-44316, Khoramabad, Iran
J.E. Palomares-Rius
Affiliation:
Instituto de Agricultura Sostenible (IAS), Consejo Superior de Investigaciones Científicas (CSIC), Avenida Menéndez Pidal s/n, 14004 Córdoba, Campus de Excelencia Internacional Agroalimentario, ceiA3, Spain
P. Castillo
Affiliation:
Instituto de Agricultura Sostenible (IAS), Consejo Superior de Investigaciones Científicas (CSIC), Avenida Menéndez Pidal s/n, 14004 Córdoba, Campus de Excelencia Internacional Agroalimentario, ceiA3, Spain
J. Abolafia
Affiliation:
Departamento de Biología Animal, Biología Vegetal y Ecología, Universidad de Jaén, Campus ‘Las Lagunillas’ s/n, Edificio B3, 23071 Jaén, Spain
R. Ghaderi
Affiliation:
Department of Plant Protection, School of Agriculture, Shiraz University, 71441-65186, Shiraz, Iran
J. Helder
Affiliation:
Laboratory of Nematology, Department of Plant Sciences, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
X. Qing
Affiliation:
Department of Plant Protection, Nanjing Agricultural University, Nanjing, China
*
Corresponding authors: M. Hosseinvand and A. Eskandari; Emails: M.houseinvand@gmail.com; eskandari.a@znu.ac.ir
Corresponding authors: M. Hosseinvand and A. Eskandari; Emails: M.houseinvand@gmail.com; eskandari.a@znu.ac.ir
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Abstract

The application of integrative taxonomic approaches is useful to species delineation based on a combination of distinct types of characters, here morphological features and ribosomal DNA sequences. In this study, we surveyed ectoparasitic nematodes of the subfamily Merliniinae in cultivated and natural environments in Iran. Results of morphological and morphometrical studies, light and scanning electron microscopic observations, and molecular analyses allowed us the identification of fourteen known and one unknown species including representatives of the genera Amplimerlinius (five species), Geocenamus (one species), Merlinius (three species), Nagelus (two species), Paramerlinius (one species), Scutylenchus (two species), and Telomerlinius (one species). The unknown species, Scutylenchus sp., characterized by having 35–50 incisures at mid-body; lateral field with 6 longitudinal incisures; lip region slightly offset by a constriction, flattened at front end; bearing 5–7 annuli; cephalic framework not refractive; stylet robust, 18.3–27 μm long; post anal intestinal sac absent; tail elongate conical, dorsally convex, with 24 (19–28) annuli in ventral side, ending to a smooth terminus and males common; spicules 24.5–31 μm long. The phylogenetic analyses were carried out using molecular data from nuclear ribosomal DNA (rDNA) genes viz. D2–D3 expansion segments of the large ribosomal subunit (28S rRNA), partial small ribosomal subunit (18S rRNA), and internal transcribed spacer (ITS). The molecular variability of D2–D3 expansion segments of the 28S rRNA and partial 18S rRNA was low in this family in comparison to the ITS region, which could be a more helpful molecular marker in species and genus identification.

Keywords

MerliniusNagelusParamerliniusScutylenchusTelomerlinius
Type
Research Paper
Information
Journal of Helminthology , Volume 97 , 2023 , e89
Copyright
© university of Zanjan, 2023. Published by Cambridge University Press

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