Seuratascaris schmackeri sp. nov. (Nematoda: Ascarididae) from the Chinese Frog Odorrana schmackeri Boettger, 1892 (Amphibia: Anura) Based on Morphological and Molecular Evidence
Seuratascaris schmackeri sp. nov. (Nematoda: Ascarididae) from the Chinese Frog Odorrana schmackeri Boettger, 1892 (Amphibia: Anura) Based on Morphological and Molecular Evidence
Ying Liu1,2, Ji-Yong Fang2, Na Zheng3 and Hai-Long Wu1*
ABSTRACT
Here, we examined the sequences of the internal transcribed spacer1 (ITS1) region, the partial small ribosomal RNA gene (18S), and mitochondrial cytochrome-c oxidase subunit 1 (COI) genes of Seuratascaris schmackeri sp. nov., a member of ascaridoids, exhibiting characteristics of Ascaridoidea sensu Chabaud (1965) identified through microscopy. This new species was collected from the small intestine of the Chinese frog species Odorrana schmackeri Boettger, 1892, acquired from four regions of Anhui Province, southeastern China. To our knowledge, one species of the Seuratascaris genus, namely Seuratascaris numidica (Seurat, 1917) Sprent 1985, has so far been recorded. The morphology of S. schmackeri sp. nov. differs from that of S. numidica and exhibit a few unique characteristics, including more denticles in the lip, shorter intestinal caecum, longer spicular, more caudal papillae, and pre-, ad-, and post-cloacal caudal papillae pairs in the ratio of 3: 1: 6-7. BLAST analyses of the COI sequences show 59.31% nucleotide divergence with Seuratascaris numidica (Seurat, 1917) (GenBank acc. no. MG434691 and MG434692). Through morphological and molecular characterization of S. schmackeri sp. nov., we generated new data on the Seuratascaris genus, providing a crucial scientific basis for future studies on the genus.
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