Phylogenetic analysis reveals cryptic species diversity within minute intestinal fluke, Stellantchasmus falcatus Onji and Nishio, (Trematoda, Heterophyidae)

作者：Wongsawad Chalobol^*; Nantarat Nattawadee; Wongsawad Pheravut

来源：Asian Pacific Journal of Tropical Medicine, 2017, 10(2): 159-163.

DOI：10.1016/j.apjtm.2017.01.016

• Cryptic species
• Trematode
• Host-parasite relationship
• Speciation
• Stellantchasmus

Objective: To examine the taxonomic boundaries in the Stellanteluismus populations in different hosts and reveal the cryptic speciation of the Stellaurchustruis in Thailand based on both morphological and molecular approaches. Methods: Stellantduisnuisfiikatus (S. fidaltus) s.l. was collected from different hosts throughout Thailand. The worms were examined and measured. The nuclear ITS2 gene and the mitochondrial OH gene were used to investigate the S..fideatus s.l. from Dermogenus pusillus and Liza subviridis. Results: Stellatachasmus was one of food -borne trematode that widely distribute throughout Thailand. The comparison of S. fidcatus s.l. from Dermogenus pusillus and Liza subviridis indicated a genetic divergence of nuDNA with 3.6% and nuDNA with 19.3%. respectively. Morphological characteristics were fairly different in the ratio of body size, length of prepharynx, and ratio of organ size. Conclusions: Our results provide initial evidence that S. fatearns s.l. from different hosts tend to he a different species based on both molecular and morphological characters. Cryptic species complexes are generally found among parasites that tend to have large populations and/or rapid evolution. The degree of genetic diversity existing would suggest the practice of targeted regimes to design and minimize these lections of anthelmintic resistance in the future.

• 出版日期2017-2