Molecular and morphological description of a new species of Laelaps Koch, 1836 (Mesostigmata: Laelapidae) parasitic of Oligoryzomys flavescens Waterhouse (Rodentia: Cricetidae) from Argentina

SAVCHENKO EKATERINA; LARESCHI MARCELA

ACTA TROPICA

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2019 vol. 199 p. 105 - 146

0001-706X

Laelaps schatzi sp. nov. (Mesostigmata: Laelapidae) is described on the bases of mites collected from the sigmodontineOligoryzomys flavescens Waterhouse, 1837 (Rodentia: Cricetidae) in Pereyra, Buenos Aires, Argentina,based on morphological, morphometric and molecular data. Two DNA fragments, mtDNA cytochrome oxidasesubunit I (COI) and nuclear 18.S-ITS1-5.8S-ITS2 partial gene sequence were deposited in the public Genbankdatebase. The DNA extraction was conducted nondestructively using Chelex®100 modified for this study, toprevent vouchers for further microscopically examination. Laelaps schatzi sp. nov. is similar in general appearanceto Laelaps paulistanensis Fonseca, 1936 and Laelaps fonsecai Gettinger, 1992, but the new species is unique inpresenting a reticulated surface pattern on the genital shield from level of Zv1 up to posterior margin, and in thepresence of one or two additional impair seta/e between J4 setae of dorsal shield. Also, the phylogenetic analysesseparate the new species from all other species available in the GenBank of Laelaps.