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Microscopic structure of the tongue in the lesser hedgehog tenrec (Echinops telfairi, Afrosoricida) and its relation to phylogenesis

  • Petr CizekEmail author
  • Pavla Hamouzova
  • Karolina Goździewska-Harłajczuk
  • Joanna Klećkowska-Nawrot
  • Pavel Kvapil
Original Article

Abstract

The tongue of the lesser hedgehog tenrec (Echinops telfairi) was evaluated by light and scanning electron microscopy. Dorsal and lateral surfaces of the tongue were densely covered with various types of lingual papillae. Two types of mechanical papillae (filiform and conical) and two types of sensory papillae (fungiform and vallate) were observed. Rostrocaudally, the number of spikes in filiform papillae increased. Filiform, crown-like papillae were found on the radix, as well as large conical papillae with a wide base and a caudally bent single spike. Fungiform papillae were scattered in four rows on the dorsal surface. Three vallate papillae in inverse triangular layout were developed in the area of the lingual radix. Taste buds were found in the sensory papillae, i.e., fungiform and vallate. The lingual glands were predominantly seromucous. These glands were evenly scattered from the caudal portion of the lingual apex to the lingual radix. Purely serous glands were localized close to vallate papillae. A histochemical analysis of glands was performed. Results were compared to the Afrotheria (tenrec’s relatives) and Eulipotyphla (animals with similar feeding habits to tenrecs). This study is the first description of the lingual morphology in the member of the Order Afrosoricida. Moreover, it compares the effect of the phylogenetic relation to the effect of the feeding habits on the lingual morphology.

Keywords

Afrosoricida Afrotheria Eulipotyphla Morphology Tongue 

Notes

Acknowledgements

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Japanese Association of Anatomists 2020

Authors and Affiliations

  1. 1.Department of Anatomy, Histology and Embryology, Faculty of Veterinary MedicineUniversity of Veterinary and Pharmaceutical Sciences BrnoBrnoCzech Republic
  2. 2.Department of Physiology, Faculty of Veterinary MedicineUniversity of Veterinary and Pharmaceutical Sciences BrnoBrnoCzech Republic
  3. 3.Department of Biostructure and Animal Physiology, Faculty of Veterinary MedicineWrocław University of Environmental and Life SciencesWrocławPoland
  4. 4.Zoo LjubljanaLjubljanaSlovenia

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