TY - JOUR JF - Acarologia T1 - A new species of Acarothrix (Trombidiformes: Halacaridae) with notes on its sperm cells VL - 66 IS - 2 SP - 601 EP - 611 PY - 2026 SN - 0044-586X SN - 2107-7207 PB - Les Amis d'Acarologia AU - Pepato, Almir R. AU - Moreira, Daniel B. P. UR - https://doi.org/10.24349/zk4z-iry3 DO - 10.24349/zk4z-iry3 DA - 2026-06-24 ET - 2026-06-24 KW - brackish water KW - Copidognathinae KW - Southwestern Atlantic KW - marine mites KW - estuarine species AB - A new species of the genus Acarothrix Bartsch, 1990 is described, A. geraldonae sp. nov., which may be distinguished from congeneric species by the presence of two well-developed corneae; first pair of dorsal setae lying at about the middle of anterior dorsal plate, third on striated cuticle between Ocular and Posterior Dorsal plates; six setae on tibiae I-II and accessory process present. Morphology of sperm cells and accompanying secretions are also reported, being identical in all relevant aspects to the closely related genus Copidognathus Trouessart, 1888. ER -