taxonID	type	description	language	source
131387B3FF94FF96FE6702DDD8131497.taxon	type_taxon	Type species: Ptilonyssus echinatus Berlese & Troussart, 1889 Remarks To date, more than 170 species of the genus Ptilonyssus have been described (Domrow 1969 ; Pence 1975 ; Butenko 1984 ; Knee 2008 ; Dimov and de Rojas 2012 ; Dimov 2020). Representatives of this genus mainly parasitize birds from the order Passeriformes; a few species of this genus were recorded from host species of the order Falconiformes and Apodiformes (Knee and Proctor 2010; Beron 2020).	en	Haarder, Simon, Dimov, Ivan (2025): A new species of nasal mite genus Ptilonyssus (Mesostigmata: Rhinonyssidae) from Parus major and the first record of Rhinoecius brikinboricus from Asio otus in Denmark. Persian Journal of Acarology 14: 87-95, DOI: 10.22073/pja.v14i1.85958
131387B3FF97FF95FDB104B3DD231496.taxon	materials_examined	Type material Female holotype (RASP 8) from Parus major Linnaeus, 1758 (Passeriformes: Paridae), Denmark, Lejre, near train station (55 ° 36 ' 12.0 " N, 11 ° 58 ' 19.0 " E), 12 April 2023, bird collected by Lars Holm Hansen. Description (Female)	en	Haarder, Simon, Dimov, Ivan (2025): A new species of nasal mite genus Ptilonyssus (Mesostigmata: Rhinonyssidae) from Parus major and the first record of Rhinoecius brikinboricus from Asio otus in Denmark. Persian Journal of Acarology 14: 87-95, DOI: 10.22073/pja.v14i1.85958
131387B3FF97FF95FDB104B3DD231496.taxon	description	Measurements – LB – 468; WID – 194; LPS – 176; WPS – 144; LOS – 178; WOS – 112; LSS – 83; WSS – 72; LGS – 64; WGS – 72; LAS – 72; WAS – 43; LG – 82; WG – 41; LCH – 63; WCH – 9; Lleg I – 228; Lleg II – 179; LlegIII – 184; Lleg IV – 225. Dorsum (Fig. 1) – Podosomal shield (PS) occupies most of the podosomal area. Anterior part of the shield is gradually narrowed to the anterior end, posterior margin straight. Surface of this shield with 8 pairs of setae (j 2 - 6, z 2 - 5), [in holotype left seta z 5 absent]. Soft dorsal surface of podosoma with four pairs of mesolateral setae (r 5, r 6, s 5, s 6). Soft dorsal surface of opisthosoma with 6 pairs of setae (Z 1 - 4, R 1 - 2). Opisthosomal shield (OS) roughly oval-shaped, with wide shallow concavity on anterior margin; surface of this shield with 3 pairs of setae (J 1, J 2, J 4). Stigmata (Stg) with peritremes located dorsolaterally at level of coxae III. Venter (Fig. 2) – Sternal shield (SS) large, with oval shape, 3 pairs of sternal setae located on its surface (St 1 - 3), sternal formula (St 1 <St 2 = St 3). Genital shield (GS) large, surface with 1 pair of short genital setae (he 4). Soft cuticle of opisthosoma with 10 setae (Jv 1, 2, 4, Zv 1). Anal shield oval, its surface with 2 longer preanal setae are located laterally to anus (An) and 1 short postanal posterior to it, anal formula (Ad> PA). Aspero (Asp) present. Gnathosoma – Gnathosomal formula 2 - 0 - 2. Setae hyp 2 and hyp 3 are absent. Five deutosternal denticles (Dd) arranged in longitudinal row. Legs: All legs six-segmented. Formula of coxal setae 2 - 2 - 2 - 1. Tarsal receptor complex (Fig. 3 a) – Two chemo-mechanoreceptor sensilla with apical pore (up), four olfactory porous single-cavity sensilla (sw), and seven chemoreceptor sensilla with peripheral cavities (dw). Palpal receptor complex (Fig. 3 b) – Five (three large and two small) tactile sensilla, three pair of little tactile sensilla with apical pore (np), three double-walled with apical pore sensilla (dw-up), and two single-walled with apical pore sensilla (sw-up). These minute setal structures were examined and recognized with a light microscope. Male, larva, and nymph unknown. Differential diagnosis Ptilonyssus holmhanseni sp. nov. is most similar to the widespread Holarctic species Ptilonyssus pari Fain & Hyland, 1963. The differential characters between the species are given in Table 1. In short, P. holmhanseni sp. nov. supports fewer setae on the opisthosomal shield and ventral opisthosoma when compared to P. pari. The opisthosomal shield of P. holmhanseni sp. nov. is roughly ovate (with narrow posterior end in P. pari) and the anterior margin is concave (straight in P. pari). Further important differences are found in the shape of the posterior margin of the podosomal shield as well as the general shape of the sternal shield. More discrete differences are observed in the gnathosomal and sternal formula, and tarsal receptor complex. Etymology The new species is named after Lars Holm Hansen, the eminent Danish naturalist, who has contributed immensely to the on-going study of the Danish avian mite fauna.	en	Haarder, Simon, Dimov, Ivan (2025): A new species of nasal mite genus Ptilonyssus (Mesostigmata: Rhinonyssidae) from Parus major and the first record of Rhinoecius brikinboricus from Asio otus in Denmark. Persian Journal of Acarology 14: 87-95, DOI: 10.22073/pja.v14i1.85958
131387B3FF91FF92FDB50140DADB1252.taxon	materials_examined	Material examined Female and deutonymph (RASP 9) from Asio otus L. (Strigiformes: Strigidae), Denmark, Ravnholt, country road outside the city (55 ° 32 ' 28.1 " N, 9 ° 15 ' 05.0 " E), 22 February 2022, bird collected by Ken Alminde. Type locality Russia, Ryazanskaya Obl., Brikin Bor. Distribution Russia (Butenko 1976), Canada (Knee et al. 2008; Knee and Galloway 2017), Denmark (this study). Type host Asio otus (Strigiformes: Strigidae). Our record represents the first finding of Rhinoecius brikinboricus in Western Europe. Hitherto, R. brikinboricus has been reported from Canada and Russia. It is closely related to R. oti Cooreman, 1946, which is known from Asio otus from Belgium. According to Butenko (1984), R. brikinboricus can be distinguished from R. oti by the bell-shaped podosomal shield, its greater length, and the location of setae j 6 on the surface of the podosomal shield.	en	Haarder, Simon, Dimov, Ivan (2025): A new species of nasal mite genus Ptilonyssus (Mesostigmata: Rhinonyssidae) from Parus major and the first record of Rhinoecius brikinboricus from Asio otus in Denmark. Persian Journal of Acarology 14: 87-95, DOI: 10.22073/pja.v14i1.85958
131387B3FF91FF93FDD506A8DA1A178D.taxon	type_taxon	Type species: Rhinoecius oti Cooreman, 1946 Remarks Representatives of the genus Rhinoecius are specific parasites of owls (Strigiformes). This genus currently includes 12 species (Cooreman 1946; Pereira and Castro 1949; Zumpt and Patterson 1951; Strandtmann 1952; Zumpt and Till 1955; Fain 1956, 1957, 1959; Strandtmann and Wharton 1958; Amaral 1962; Bregetova 1965; Wilson 1968; Domrow 1969; Butenko 1971; McClure et al. 1973; Pence 1975; Butenko 1984; Úbeda-Ontiveros et al. 2000; Knee et al. 2008; Knee and Galloway 2017). Fain (1959) treated mite species differing from typical Rhinoecius species by the presence of tritosternum as a separate genus Zumptnyssus Fain, 1959. However, Domrow (1969) suggested that the presence or absence of tritosternum cannot serve as a diagnostic criterion for rhinonyssid genera, and treated Zumptnyssus as a synonym of Rhinoecius.	en	Haarder, Simon, Dimov, Ivan (2025): A new species of nasal mite genus Ptilonyssus (Mesostigmata: Rhinonyssidae) from Parus major and the first record of Rhinoecius brikinboricus from Asio otus in Denmark. Persian Journal of Acarology 14: 87-95, DOI: 10.22073/pja.v14i1.85958
