Records of terrestrial parasitengone mites (Acari: Erythraeidae, Microtrombidiidae) ectoparasitic on grasshoppers from Khorasan Razavi province with new morphological data

Eatoniana gonabadensis (Ahmadi, Hajiqanbar and Saboori, 2012), Charletonia saboorii Karimi Iravanlou, Kamali and Talebi, 2002 and Eutrombidium sorbasiensis Mayoral and Barranco, 2004 were collected and identified ectoparasitic on Acrididae and Tettigoniidae (Orthoptera) from Dehbar village, Mashhad city, Khorasan Razavi province in 2019. Eatoniana gonabadensis and C. saboorii belong to the subfamily Erythraeinae Robineau-Desvoidy, 1828 and Callidosomatinae Southcott, 1957 (Acari: Prostigmata: Erythraeidae), respectively. Eutrombidium sorbasiensis belongs to the family Microtrombidiidae Thor, 1935 and subfamily Eutrombidiinae Thor, 1935. Eatoniana gonabadensis has been described before from Gonabad city, Khorasan Razavi province ectoparasitic on Aphis craccivora Koch, 1854 (Hemiptera: Aphididae) and Dociostaurus cf. tartarus Stshelkanovtzev, 1921 (Orthoptera: Acrididae) and it is the second record from this province. Also, this species was recorded ectoparasitic on an unidentified grasshopper (Tettigoniidae) from Pol-e Sefid city, Mazandaran province, Iran. Charletonia saboorii has been described before from Varamin region ectoparasitic on Heteracris littoralis (Rambur, 1838) (Orthoptera: Acrididae). In the present paper, the new morphological data for E. gonabadensis (eight normal setae on Ge I; two pairs of setae between Cx II and III; fn Ta I–III 26-23-23; anterior hypostomalae (aHy) present; fPp: 0-B-B-BBB2-4Nωzz) and new metric data for C. saboorii are presented.