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Background <p>Filarioses are common nematode infections in camels (<i>Camelus</i> spp.). The most significant disease is caused by <i>Deraiophoronema evansi</i>, which impacts camel reproductive function, working ability, and productivity. The taxonomy of this onchocercid is equivocal, and its phylogenetic relationships within Onchocercidae are ambiguous.</p> Methods <p>We analyzed <i>D. evansi</i> specimens from camels and examined their morphology. For comparative material, we analyzed fresh specimens from camels in Iran and specimens from Egypt deposited in the Muséum National d’Histoire Naturelle (MNHN) collections. Multi-locus sequence analyses based on seven genes (two mitochondrial genes <i>cox1</i> and <i>12S</i> ribosomal DNA (rDNA) and five nuclear genes <i>18S</i> rDNA, <i>28S</i> rDNA, <i>MyoHC</i>, <i>rbp1</i>, and <i>hsp70</i>) of these filarioids and six genes of <i>Wolbachia</i> (<i>16S</i> rDNA, <i>ftsZ</i>, <i>dnaA</i>, <i>coxA</i>, <i>fbpA</i>, and <i>gatB</i>) were analyzed.</p> Results <p><i>Deraiophoronema evansi</i> (Lewis, 1882) Romanovitch 1916 <i>combinatio nova</i> (n. comb.)(syn: <i>Dipetalonema evansi</i>) was described on the basis of morphological characteristics and its genetic divergence from congeners. Molecular characteristics of the new species revealed its close evolutionary relationship with <i>Setaria</i> sp. <i>Wolbachia</i> endosymbiont was not present in <i>D. evansi</i>.</p> Conclusions <p>We provide new molecular and morphological data on <i>D. evansi</i>, increasing the number of valid genera of Setariinae to four and setting up the taxonomic information regarding this species of veterinary importance.</p> Graphical abstract <p></p>

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Morphological redescription and taxonomic reassignment of Deraiophoronema evansi (Lewis, 1882) Romanovitch 1916 n. comb. (syn: Dipetalonema evansi) (Spirurida: Onchocercidae) from camels

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  • 发表日期：

    2025年10月10日

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  • Coralie Martin,
  • Jules Rodrigues,
  • Frédéric Fercoq,
  • Nathaly Lhermitte-Vallarino,
  • Alireza Sazmand,
  • Daisuke Kimura,
  • Shigehiko Uni

摘要

Background

Filarioses are common nematode infections in camels (Camelus spp.). The most significant disease is caused by Deraiophoronema evansi, which impacts camel reproductive function, working ability, and productivity. The taxonomy of this onchocercid is equivocal, and its phylogenetic relationships within Onchocercidae are ambiguous.

Methods

We analyzed D. evansi specimens from camels and examined their morphology. For comparative material, we analyzed fresh specimens from camels in Iran and specimens from Egypt deposited in the Muséum National d’Histoire Naturelle (MNHN) collections. Multi-locus sequence analyses based on seven genes (two mitochondrial genes cox1 and 12S ribosomal DNA (rDNA) and five nuclear genes 18S rDNA, 28S rDNA, MyoHC, rbp1, and hsp70) of these filarioids and six genes of Wolbachia (16S rDNA, ftsZ, dnaA, coxA, fbpA, and gatB) were analyzed.

Results

Deraiophoronema evansi (Lewis, 1882) Romanovitch 1916 combinatio nova (n. comb.)(syn: Dipetalonema evansi) was described on the basis of morphological characteristics and its genetic divergence from congeners. Molecular characteristics of the new species revealed its close evolutionary relationship with Setaria sp. Wolbachia endosymbiont was not present in D. evansi.

Conclusions

We provide new molecular and morphological data on D. evansi, increasing the number of valid genera of Setariinae to four and setting up the taxonomic information regarding this species of veterinary importance.

Graphical abstract