Description and molecular analysis of Tylencholaimus helanensis sp. n. from China (Dorylaimida, Tylencholaimidea)

Abstract

A new species, Tylencholaimushelanensissp. n., extracted from the rhizosphere soil of unidentified grasses from Helan Mountain, Inner Mongolia, China was identified. The new species is characterized by having a body length of 0.93–1.07 mm with the lip region approximately one-quarter of the body diameter at the posterior end of the neck region wide; female didelphic-amphidelphic; pars proximalis vaginae violin-shaped. Males were not found. SEM observations of the new species were made and a phylogenetic analysis of both the 18S rDNA and the D2-D3 region of 28S rDNA is presented.

Three new species, one new genus and subfamily of Dorylaimida (de Man, 1876) Pearse, 1942, and revisions on the families Tylencholaimellidae Jairajpuri, 1964 and Mydonomidae Thorne, 1964 (Nematoda: Dorylaimida)

“…However, Tylencholaimus zhongshanensis sp. nov. can be differentiated from T. helanensis mainly by body length and shorter odontostyle (473–605 µm vs. 0.93–1.07 mm; 5–6 µm vs. 8–9.5 µm), and female prodelphic (vs. didelphic-amphidelphic) (Wu et al, 2018) although the sequences showed the highest similarity to each other.…”

Five new and five known species of the genus Tylencholaimus de Man, 1876 (Nematoda: Dorylaimida: Tylencholaimoidea) from Western Ghats of India

“…The presently reported populations represented five known species (T. mirabilis, T. teres, T. micronanus, T. ibericus and T. cosmos) and five new species. With the addition of the presently described new species, the total number of valid species under this genus is raised to 62 (Ahad & Ahmad 2016;Wu et al 2018;Golhasan et al 2019), 27 of them are recorded from India, and 11 species are recorded from the Western Ghats. Tylencholaimus mirabilis, the type species is reported here for the first time from India.…”