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Jurgelėnas E, Jasinevičiūtė I, Daugnora L. Prevalence and Characterization of Dental and Skull-Bone Pathologies of the Raccoon Dog ( Nyctereutes procyonoides) in Lithuania. Animals (Basel) 2023; 13:2437. [PMID: 37570246 PMCID: PMC10417453 DOI: 10.3390/ani13152437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/24/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
The present investigation endeavours to discern dental and non-dental pathologies affecting cranial structures of raccoon dogs, while focusing on cases of periodontitis. Furthermore, the study aims to conduct a comparative analysis based on sex and the nature of the pathologies encountered. The number of investigated skulls amounted to 126, including 76 males and 50 females. The predominant pathology identified was hypodontia, which accounted for 26.7% of males and 20% of females. Notably, the majority of hypodontia cases involved the absence of the mandibular third molar. Another noteworthy pathology was various stages of periodontitis, with rates ranging from 21.3% in males to 8% in females. Other pathologies, like tooth fractures and abrasion, were significantly less encountered. Excessive bone formation was relatively abundant and localized in specific areas-the parietal bone and the occipital regions. This tendency was observed in 8% of male cases and 6% of females. We found that the total number of dental and skull-bone pathologies is significantly more common in males than in females (p = 0.003). Additionally, the total number of various cases of periodontitis is more common in males too (p = 0.04).
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Affiliation(s)
- Eugenijus Jurgelėnas
- Department of Anatomy and Physiology, Veterinary Academy, Lithuanian University of Health Sciences, Tilžės 18, LT-47181 Kaunas, Lithuania;
| | - Indrė Jasinevičiūtė
- Department of Anatomy and Physiology, Veterinary Academy, Lithuanian University of Health Sciences, Tilžės 18, LT-47181 Kaunas, Lithuania;
| | - Linas Daugnora
- Institute of Baltic Region History and Archaeology, Klaipėda University, Herkaus Manto 84, LT-92294 Klaipėda, Lithuania
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Ai HS, He K, Chen ZZ, Li JQ, Wan T, Li Q, Nie WH, Wang JH, Su WT, Jiang XL. Taxonomic revision of the genus Mesechinus (Mammalia: Erinaceidae) with description of a new species. Zool Res 2018; 39:335-347. [PMID: 29695683 PMCID: PMC6102679 DOI: 10.24272/j.issn.2095-8137.2018.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hedgehogs in the genus Mesechinus (Family Erinaceidae), which include two currently recognized species (M. dauuricus and M. hughi), are distributed from northeast Mongolia to the upper Amur Basin in Russia and adjacent areas in northeast and northern China. In recent years, a population of Mesechinus hedgehogs was discovered from Mt. Gaoligong, southwestern Yunnan, China, far from the known distribution range of the genus. Furthermore, these hedgehogs are the only known population to be distributed at elevations higher than 2 100 m and in sympatry with gymnures. To evaluate the taxonomic status of these hedgehogs, we examined specimens representing Mesechinus taxa in China and further conducted morphometric and karyotypic analyses. Our results supported the existence of four species in China. Specifically, we identified the hedgehogs from Mt. Gaoligong as a new species, Mesechinus wangisp. nov., and recognized M. miodon, previously considered as a synonym of either M. dauuricus or M. hughi, as a distinct species. Interestingly, we observed a supernumerary M4 on all specimens of Mesechinus wangisp. nov., which is an extremely rare event in the evolution of mammalian dentition.
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Affiliation(s)
- Huai-Sen Ai
- Gaoligongshan National Nature Reserve, Baoshan Yunnan 678000, China
| | - Kai He
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China; E-mail:.,The Kyoto University Museum, Kyoto University, Kyoto 606-8501, Japan
| | - Zhong-Zheng Chen
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China.,College of Life Sciences, Anhui Normal University, Wuhu Anhui 241000, China
| | - Jia-Qi Li
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing Jiangsu 210042, China
| | - Tao Wan
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Quan Li
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Wen-Huan Nie
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Jin-Huan Wang
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Wei-Ting Su
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Xue-Long Jiang
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China; E-mail:
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