Acta Parasitologica

, Volume 63, Issue 1, pp 154–159 | Cite as

Morphological and molecular characterization of Seuratascaris numidica (Seurat, 1917) (Ascaridida: Ascarididae)

  • Chen Hui-Xia
  • Zhang Kuang
  • Zhang Lu-Ping
  • Li LiangEmail author


Seuratascaris numidica (Seurat, 1917) is a specialized nematode species parasitizing amphibians only. In the present study, the detailed morphology of this poorly known species was studied using light and scanning electron microscopy based on the newly material collected from Hoplobatrachus chinensis (Osbeck) (Amphibia: Anura) in China. We found that the relative length of intestinal caecum in our male specimens (representing 68.4–71.1% of oesophageal length) is slighter longer than the previously reported data (not over 60.0% of oesophageal length). Our SEM observations also revealed the presence of ca. 64–76 small conical denticles on each lip. In addition, Angusticaecum wuyiensis Wang, 1981, collected from Rana schmackeri Boettger (Amphibia: Anura) from Wuyi Mountain in Fujian Province, China was considered as a new synonym of S. numidica. The ITS and cox1 sequences of S. numidica were also sequenced for the first time and there is no nucleotide variability detected in both regions. The present supplementary morphological and molecular data (especially the ITS and cox1 sequences) obtained herein is extremely important and useful to determine the morphological variability, population genetics and phylogenetic position of S. numidica in the future.


Nematode Amphibia Seuratascaris morphology internal transcribed spacer (ITS) cytochrome c oxidase subunit 1 (cox1) 


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Copyright information

© Witold Stefański Institute of Parasitology, Polish Academy of Sciences 2018

Authors and Affiliations

  • Chen Hui-Xia
    • 1
  • Zhang Kuang
    • 1
  • Zhang Lu-Ping
    • 1
  • Li Liang
    • 1
    Email author
  1. 1.Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life SciencesHebei Normal UniversityShijiazhuang, Hebei ProvinceP. R. China

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