TY - JOUR JF - Acarologia T1 - A new opilioacarid species (Parasitiformes: Opilioacarida) from Crete (Greece) with notes on its karyotype VL - 61 IS - 3 SP - 548 EP - 563 PY - 2021 SN - 0044-586X SN - 2107-7207 PB - Les Amis d'Acarologia AU - Vázquez, Maria Magdalena AU - Ávila Herrera, Ivalú Macarena AU - Just, Pavel AU - Reyes Lerma, Azucena Claudia AU - Chatzaki, Maria AU - Heller, Tim Lukas AU - Král, Jiří UR - https://doi.org/10.24349/acarologia/20214449 DO - 10.24349/acarologia/20214449 DA - 2021-06-07 ET - 2021-06-07 KW - chromosome KW - internal structure KW - Opilioacaridae KW - Opilioacarus KW - ovipositor AB - A new species of opilioacarid mite, Opilioacarus thaleri n. sp., is described from mid-level elevation close to the seashore in Crete (Greece). It was found on moister sites, under stones or inside stone accumulations in phrygana vegetation. The peak of activity was found to be in early May. The diagnostic morphological characters include 7–8 eugenital setae (female), 5/7 setae on each sclerite at pregenital and genital areas, 11 setae on genital area (male), anterior dorsal shield with two pairs of eyes and 60–70 stout, ribbed setae, 5 (female) or 6 (male) leaf setae plus one pectinate seta on the palp tarsus, and the "simple" type of ovipositor with two pairs of glands, a pair of ducts plus a basal structure. The female karyotype comprises 16 monocentric chromosomes, predominantly with acrocentric morphology. Comparison with data of the ixodids and mesostigmatids indicates that a low number of chromosomes and predomination of acrocentric chromosomes could be plesiomorphies of the parasitiform mites. ER -