A NEW SPECIES OF THE FEATHER MITE GENUS TROUESSARTIA (ACARIFORMES: TROUESSARTIIDAE) FROM ROBINS OF THE GENUS LARVIVORA (PASSERIFORMES: MUSCICAPIDAE) FROM ASIAN RUSSIA, WITH BARCODE DATA

Abstract

The paper describes a new species, Trouessartia cyane sp. n., collected from the Siberian Blue Robin Larvivora cyane (Pallas) (type host) and the Rufous-tailed Robin L. sibilans Swinhoe in Primorsky Krai (the Russian Far East). The description is supplemented with barcoding data (mitochondrial cytochrome C oxidase subunit I gene). Trouessartia cyane is closest to T. larvivorae Mironov, 2021 and T. rubecula Jablonska, 1968, differing mainly in measurable characteristics. In particular, in males of T. cyane, the length of terminal lamellae is 20–23 (vs. 25–30 in T. larvivorae and 30–35 in T. rubecula); in females, the length of idiosoma is 515–545 (vs. 555–590 in T. larvivorae and 570–625 in T. rubecula), the distance between setae se is 85–90 (vs. 100–120), the width of opisthosoma at the level of setae h2 is 87–97 (vs. 105–115), setae h1 are thin spiculiform (vs. lanceolate). Genetic distances within T. cyane, as well as between the new species and four closely related Trouessartia species from four muscicapids distributed in northern Eurasia, have been analyzed using Kimura’s two-parameter (K2P) model. Intraspecific genetic distances within T. cyane varied between 0.006 and 0.01; interspecific distances between the new species and morphologically close species ranged from 0.154 (T. rubecula) to 0.185 (T. calliope).