Two new species of feather mites (Acarina: Psoroptidia) from the Oriental Magpie-Robin, Copsychus saularis (Passeriformes:

Two new feather mite species from the bird host Copsychus saularis (Linnaeus) collected in Indonesia (Kalimantan) are described: Dolichodectes latilobus n. sp. (Proctophyl-lodidae, Pterodectinae), and Trouessartia saularis n. sp. (Trouessartiidae). The new species, Dolichodectes latilobus , has the following distinctive characters: in males, the opisthosomal lobes are widened in the posterior half; the opisthoventral shields are fused, forming a single shield that covers ventrally the posterior quarter of the body; legs I have longitudinal crest-like processes ; and setae ra on these legs are spiculiform. In females of D. latilobus , the posterior margin of the hysteronotal shield has a deep median invagination, and epimerites II extend to the level of the anterior margin of epigynum. The males of T. saularis have the adanal apodemes with two narrow lateral membranes, and the females have the terminal cleft width smaller than the opisthosomal lobe width, and the collar of the spermatheca cover 1/2 from the length of secondary spermaduct.


Introduction
With over 100 known species, Indonesian archipelago is ranked 11th in the world with respect to recorded feather mite biodiversity (Doña et al. 2016). Studies on feather mites in this area began over 100 years ago, with the first papers realized by early acarologists on the feather mite fauna associated with parrots (Psittaciformes) (Trouessart 1884(Trouessart , 1885Favette and Trouessart 1904). The fauna of parrots in this country, particularly varied and spectacular, with endemic or rare species, has continued to fascinate acarologists over time; so other feather mites species from these hosts have been described or reinvestigated in a series of papers published in the past forty years (Atyeo and Pérez 1982;Atyeo and Gaud 1991;Gaud and Atyeo, 1996;Mironov and Perez 2003;Mironov and Dabert 2010;Mironov et al. , 2014. A comprehensive paper, dedicated to feather mites that live on birds from the family Megapodidae (Galliformes), includes 34 species of feather mites from Indonesia (Atyeo 1992). Descriptions of feather mite species from other hosts orders in Indonesia are scattered in various taxonomic papers (Bonnet 1924;Atyeo and Braasch 1966;Santana 1976;Peterson and Atyeo 1977;Pérez and Atyeo 1981;Gaud et al. 1985;Atyeo 1986, 1987;Atyeo and Gaud 1992;Dabert and Ehrnsberger 1996;Mironov et al. 2002Mironov 2006;Dabert and Labrzycka 2009). Atyeo (in McClure and Ratanaworabhan 1973) reported 11 species of feather mites from this country, 9 of which are presumably new species. There are 1,748 species of birds in Indonesia (Clements et al. 2016), and 609 in Kalimantan (Indonesian Borneo) (Lepage 2017). Each is a potential host for several feather mite species, so it is evident that the investigation of this group in this country is far from being exhaustive. The genus Copsychus (Passeriformes: Muscicapidae) comprises 11 species of magpie-robins and shamas, distributed in Madagascar, South Asia, Indonesia and the Philippines (Clements et al. 2016). The Oriental Magpie Robin, Copsychus saularis (Linnaeus) is a small sized species distributed in the tropical area of southern Asia, being native to Bangladesh, Bhutan, Brunei Darussalam, Cambodgia, China, India, Indonesia, Laos People's Democratic Republic, Malaysia, Myanmar, Nepal, Pakistan, Singapore, Sri Lanka, Thailand, Vietnam, and was introduced to Taiwan (BirdLife International 2017). It is an anthropophilic bird, common in forests, parks, gardens and feeds on insects and other small invertebrates on the ground (MacKinnon and Phillipps, 1993).
The goal of the present paper is to describe two new feather mite species belonging to genera Trouessartia and Dolichodectes, collected from the Oriental Magpie-Robin, Copsychus saularis.

Materials and methods
Mites were collected by the authors from museum specimens of birds preserved in ethanol, from the Ornithological Collection of "Grigore Antipa" National Museum of Natural History (Bucharest, Romania). The ethanol in which the birds were conserved was filtered through filter paper, and mite specimens were collected manually with a needle, and placed in tubes with 96% ethanol. Then mite specimens were cleared in 90 % lactic acid for 24 hours, and mounted on microscope slides in Hoyer's medium. Drawings were made using an Olympus CX21 microscope, equipped with a camera lucida drawing device. The taxonomy of birds follows Clements et al. (2016). The body setation of mites follows that of Griffiths et al. (1990) with the modifications of Norton (1998) concerning coxal setae, while the leg setation follows Gaud and Atyeo (1996). In the descriptions, we used a set of standard diagnostic characters used for species of the family Trouesartiidae (Mironov and González-Acuña 2013;Hernandes 2014;Hernandes and Valim 2015) and Dolichodectes (Hernandes and Valim 2006, respectively. Measurements are given for the holotype (male) and followed by ranges for paratypes. All measurements are in micrometers (μm). The mite specimens studied herein are deposited in the Acari Collection of "Grigore Antipa" National Museum of Natural History, Bucharest, Romania (MGAB) and in the Acari Collection of the Department of Zoology of the Universidade Estadual Paulista, Rio Claro, São Paulo, Brazil (DZUnesp-RC).

Taxonomy
Family Proctophyllodidae Trouessart et Mégnin, 1884 Subfamily Pterodectinae Park et Atyeo, 1971 Genus Dolichodectes Park et Atyeo, 1971 The feather mite genus Dolichodectes Park and Atyeo, 1971 currently includes nine species; one of them is widespread throughout the Old Word, one is described from Europe, one is from Asia, and six other species are recorded from Africa (Trouessart 1885;Gaud and Mouchet 1957;Mironov and Fain 2003;Mironov et al. , 2012Mironov et al. , 2015. Atyeo (in: McClure and Ratanaworabhan 1973) reported 16 undetermined and presumably new species of this genus from Asia. To date, only one species of the genus Dolichodectes has been described from birds of the genus Copsychus: Dolichodectes furcilobus Mironov, Literák, Hung and Čapek, 2012 from the White-rumped Shama, Copsychus malabaricus (Scopoli) (Passeriformes: Muscicapidae) in Vietnam . Of the nine species of the genus, three species were identified from birds of the family Muscicapidae, two species from birds of the family Acrocephalidae, and one from birds of the families Platysteiridae, Turdidae, Stenostiridae and Passeridae. Dolichodectes latilobus is the fourth species described from birds of the family Muscicapidae. Type material -Holotype male and 16 paratypes (5 males and 11 females), from Copsychus saularis (Linnaeus) (Passeriformes: Muscicapidae), Indonesia, Kalimantan Island, Lhok Tuan, east of the Kutai National Park, 18 May 1991, bird inventory number 15719-47, no other data.
Etymology -The specific epithet refers to the widened posterior ends of the opisthosomal lobes in males (from Latin latus = wide, broad).
Differential diagnosis -The new species Dolichodectes latilobus n. sp. is most similar to D. furcilobus Mironov, Literák, Hung and Čapek, 2012 described from the White-rumped Shama, Copsychus malabaricus in Vietnam . In both sexes of this species, the prodorsal and hysteronotal shields are very close to each other, and the ornamentation of these dorsal shields is similar, with transverse dashes and ovate lacunae; the prodorsal shield has the antero-lateral extensions widely connected to bases of epimerites Ia. In males, the prodorsal shield has the anterior margin with triangular rostral process and bilobate apices of opisthosomal lobes. In females, the shape of lobar region is similar, with median part of anterior margin slightly convex; the supranal concavity is absent; the terminal cleft is parallel-sided, narrow and with lateral margins almost touching. Dolichodectes latilobus n. sp. clearly differs from D. furcilobus by the following features: in males, the opisthosomal lobes are widened in the posterior half and the posterior end of each lobe has a pair of divergent extensions (outer extensions are round, inner extensions are pointed); the hysteronotal shield is strongly narrowed between the levels of setae d2 and e1; the genital shields are fused to each other at the midline of the body, and the opisthoventral shields are fused together forming a single shield that covers the posterior quarter of the body; the aedeagus does not reach the anterior margins of the anal suckers; legs I have dorsal crest-like processes on genu, tibia and tarsus, and setae ra of tarsi I are spiculiform. In females of the new species, the posterior margin of the hysteronotal shield has a deep median invagination extending up to the level of e2 setae and epimerites II extend to the level of the anterior margin of the epigynum. In males of D. furcilobus, the opisthosomal lobes are narrowed in the posterior half and the posterior end of each lobe has a pair of pointed and almost parallel extensions; the hysteronotal shield is moderately narrowed between the pairs of setae d2 and e1; the genital shields are separated and the opisthoventral shields are connected by only a wide transverse bridge; the aedeagus reaches the anterior margins of the anal suckers; legs I are devoid of any dorsal processes, and setae ra of tarsi I are filiform. In females of D. furcilobus, the posterior margin of hysteronotal shield is slightly concave and lacks the median invagination, and epimerites II are much shorter and do not extend to the level of the anterior margin of the epigynum.
Epimerites I free. Epigynum 42 -48 in length, 70 -80 in width (Figure 9). Epimerites IVa present. Anal opening with two small ovate adanal sclerites situated at level of its anterior end. Setae sR of trochanters III narrowly lanceolate, with pointed apices, 18 -20 long, setae cG and mG of genua I, II filiform. Legs IV with ambulacral disc extending to midlevel between setae h2 and h3.  Differential diagnosis -Trouessartia saularis n. sp. morphologically is most similar to T. microfolia Gaud, 1952 described from Copsychus albospecularis from Madagascar (Gaud 1952). In both sexes of these species, the antero-lateral extensions of the prodorsal shield are not connected with bases of epimerites Ia, the lateral margins of the hysteronotal shields are without dorsal hysteronotal apertures and setae c2 are lanceolate and almost two times longer than setae c3 and sRIII. Males of both species have the hysteronotal shield entire and its prohysteronotal and lobar parts delimited from each other by small lateral incisions at the level of setae e2. In females, setae h1 are spiculiform and the collar of the spermathecal head has a fringe of minute spines. Trouessartia saularis differs from T. microfolia by the following features. In both sexes of T. saularis, the prodorsal shield lacks ornamentation; in males, the terminal lamellae are slightly attenuate apically, the inner ends of epimerites IVa do not extend  to the level of setae g, the postgenital plaque is absent; in females, the terminal cleft width is smaller than the opisthosomal lobe width and the collar of the spermatheca covers 1/2 the length of the secondary spermaducts. In both sexes of T. microfolia, the prodorsal shield has an ornamentation of a faint network; in males, the terminal lamellae are bluntly rounded, the inner ends of epimerites IVa extend to the level of setae g, the postgenital plaque is present; in females, the terminal cleft is larger than the opisthosomal lobe width, and the collar of the spermatheca covers about 1/6 the length of the secondary spermaduct.