Acta Parasitologica

, Volume 64, Issue 1, pp 1–6 | Cite as

Redescription of Porrocaecum semiteres (Zeder, 1800) (Nematoda: Ascaridida) from the Song Thrush Turdus philomelos (Passeriformes: Turdidae)

  • Liang LiEmail author
  • Tomáš Scholz
Original Paper



Porrocaecum semiteres (Zeder, 1800) (Ascaridida: Ascaridoidea) occurs frequently in various birds in Europe. However, the knowledge of the morphology of this species remains insufficient.


Light and scanning electron microscopy were used to study the detailed morphology of adults of P. semiteres based on newly collected specimens from Turdus philomelos in the Czech Republic.


Some previously unreported morphological features were revealed, including the presence of a medio-apical notch, 70–80 small conical denticles and one pair of submedial pores on each lip, the absence of caudal alae, the presence of four pairs of postcloacal papillae, and a single, medio-ventral precloacal papilla.


Ascaridida Bird Porrocaecum Morphology Taxonomy SEM 



The authors wish to thank František Marec (Institute of Entomology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic) for providing the freshly dead host and František Moravec (Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic) for providing useful literature. We are also grateful to Dr. Hui-Xia Chen (Hebei Normal University, Shijiazhuang, China) for help with the illustrations. This study was supported by the National Natural Science Foundation of China (NSFC-31572231), Natural Science Foundation of Hebei Province (NSFH-C2016205088), the Youth Top Talent Support Program of Hebei Province for Liang Li, and the Institute of Parasitology (RVO: 60077344).

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Witold Stefański Institute of Parasitology, Polish Academy of Sciences 2019

Authors and Affiliations

  1. 1.Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life SciencesHebei Normal UniversityShijiazhuangPeople’s Republic of China
  2. 2.Institute of ParasitologyBiology Centre of the Czech Academy of SciencesČeské BudějoviceCzech Republic

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