Acarina 28 (1): 29–38 © Acarina 2020 A NEW GENUS OF THE FEATHER MITE FAMILY PROCTOPHYLLODIDAE (ACARIFORMES: ANALGOIDEA) FROM WOODCREEPERS (PASSERIFORMES: FURNARIIDAE: DENDROCOLAPTINAE) IN THE NEOTROPICS Sergey V. Mironov1* and Sergio Bermúdez2 1Department of Parasitic Arthropods, Zoological Institute, Russian Academy of Sciences, Saint Petersburg, Russia 2Departamento de Investigación en Entomología Médica, Instituto Conmemorativo Gorgas de Estudios de la Salud, Panamá, Panama *corresponding author; e-mail: [email protected] ABSTRACT: A new feather mite genus Dendrocolaptobius gen. n. belonging to the Nycteridocaulus generic group (Proctophyl- lodidae: Proctophyllodinae) is described. The genus includes two species associated with woodcreepers (Furnariidae: Dendro- copaptinae): Dendrocolaptobius cuneiformis (Mironov, 2017) comb. n. previously described from Sittasomus griseicapillus (Vieillot) in Costa Rica; and D. lepidocolapti sp. n. described herein from Lepidocolaptes souleyetii (Lafresnaye) in Panama. The new genus Dendrocolaptobius is clearly distinguished from the other genera of the Nycteridocaulus group in having an inverted genital arch and enlarged bow-shaped basal sclerite in males and the copulatory opening situated dorsally on the lobar region in females. KEY WORDS: Analgoidea, Proctophyllodidae, Dendrocolaptobius, systematics, Dendrocolaptinae, Panama. DOI: 10.21684/0132-8077-2020-28-1-29-38 INTRODUCTION Woodcreepers (Furnariidae: Dendrocolaptinae) The genus Platyacarus represents one of two are a subfamily of arboreal suboscine passerines major lineages (generic groups) of proctophyllo- widely distributed throughout the Neotropical re- dines associated with suboscine passerines in the gion. This bird group was previously considered a Neotropical region (Klimov et al. 2017). This ge- distinct family Dendrocolaptidae (e. g., Howard and neric group, also including the genera Tanyphyl- Moore 1991), but the recent research places them lodes Atyeo, 1966 and Tyranniphyllodes Hernandes, as a monophyletic subfamily of the ovenbirds (Pas- Valim and Mironov, 2007, is restricted to birds of seriformes: Furnariidae) (Irestedt et al. 2009; Moyle the clade Furnariida (Atyeo 1966a; Hernandes et et al. 2009; Derryberry et al. 2011). The dendroco- al. 2007; Mironov and González-Acuña 2009). laptines currently contain around 57 species in 16 The second major lineage is the Nycterido- or more genera (Gill and Donsker 2018). They caulus generic group, which currently includes superficially resemble treecreepers (Passeriformes: 31 species in seven genera: Anisophyllodes Atyeo, Certhiidae) and woodpeckers (Piciformes: Picidae) 1967, Atrichophyllodes Hernandes, Pedroso and both morphologically and ecologically, but these Mironov, 2007, Armophyllodes Mironov and similarities are due to convergent evolution. Bermúdes, 2018, Diproctophyllodes Atyeo, 1966, The feather mite fauna associated with this Hemipterodectes Berla, 1959, Nycteridocaulus group of passerines is almost completely unex- Atyeo, 1966, and Rupicolacarus Atyeo, 1972 plored, except for the representatives of the family (Berla 1959; Atyeo 1966b, 1967, 1969, 1972; Atyeo Proctophyllodidae (Acariformes: Analgoidea). In and Gaud 1968; Hernandes et al. 2007; Hernandes a series of taxonomic papers, Kudon (1982a–e) and Valim 2014; Mironov et al. 2017; Mironov described the new proctophyllodid genus Platya- and Bermúdes 2018). In contrast to the Platyaca- carus Kudon, 1982 (Proctophyllodinae) with 12 rus group, the majority of representatives of the new species from the representatives of Dendroco- Nycteridocaulus group are associated with sub- laptinae and analyzed their host associations. Sub- oscines of the clade Tyrannida, with a few species sequent investigations by other researchers pro- known from oscine passerines of the families duced descriptions of seven more Platyacarus Parulidae and Troglodytidae. Only one species of species, among which five were also from wood- the second group—Anisophyllodes cuneiformis creepers, and two were from a different furnariid Mironov, 2017—was described from a representa- subfamily—the leaftossers (Sclerurinae) (Hernan- tive of Dendrocolaptinae, the Olivaceous Wood- des et al. 2007; Hernandes and Valim 2014; Miro- creeper, Sittasomus griseicapillus (Vieillot) in nov et al. 2017). Costa Rica. 29 S. V. Mironov and S. Bermúdez In the present paper we establish a new procto- Type species: Anisophyllodes cuneiformis phyllodine genus Dendrocolaptobius gen. n. belong- Mironov, 2017 (in: Mironov et al. 2017). ing to the Nycteridocaulus group and including two species: A. cuneiformis and one newly described Diagnosis. Both sexes. Moderately elongated species from the Streak-headed Woodcreeper, proctophyllodines. Prodorsal shield entire, covering Lepidocolaptes souleyetii (Lafresnaye), in Panama. almost the entire surface of the prodorsum, with anterolateral extensions, and with posterior oblique- MATERIALS AND METHODS ly angled. Vertical setae ve rudimentary, represented The material used in the present work was col- by alveoli. Scapular setae si and se situated on lected during our parasitological survey in central prodorsal shield and arranged in transverse line. and western Panama (Colón and Chiriquí Provinces) Humeral shields well-developed dorsally, encom- in April 2016. The birds were captured with mist-nets passing bases of setae cp, setae c2 on margin of these placed near the edge of tropical rainforest, identified shields. Subhumeral setae c3 lanceolate. Epimerites and checked for the presence of ectosymbionts. The I free, with posterior ends slightly divergent. Full set feather mites were taken from live birds under a of hysterosomal setae occurring in proctophyllodines stereomicroscope (magnification × 10–20) with a present. Solenidion σ of genu I longer than solenid- preparation needle or fine forceps and placed in tubes ion ω3 of tarsus I. Tarsi I and II with 3 ventral setae, with 96% ethanol. After this processing taking 5–10 seta wa slightly anterior to setae la and ra on these minutes, the captured birds were released into the tarsi. Segments of legs I and II without processes or wild. In the laboratory, the feather mites were moun- other modifications. ted on slides in Hoyer’s medium according to the Male. Hysteronotal shield covering almost all standard technique for small acariform mites (Krantz hysterosoma. Opisthosoma strongly attenuate pos- and Walter 2009). The investigation of mite speci- teriorly, roughly triangular in shape (Fig. 1A). mens and drawings were made using a Leica DM Opisthosomal lobes small, represented by small 2500 light microscope equipped with differential semi-ovate extensions on the posterior end of opis- interference contrast (DIC) and a camera lucida. thosoma, separated by very narrow terminal cleft, The description of the new species and tech- with narrow terminal lamellae along posterolat- niques for measuring morphological structures eral margin of lobes. Supranal concavity present. follow the current formats elaborated for procto- Setae h3 shorter than macrosetae h2. Setae h1 close phyllodid mites (Mironov 2006, 2012, 2017; Her- to transverse levels of setae ps2 and h2. Coxal fields nandes et al. 2007; Mironov and González-Acuña I–IV open, without extensive sclerotized areas. 2009; Hernandes 2014; Mironov et al. 2017). Genital organ at level of trochanters IV; genital General morphological terms and idiosomal chae- arch inverted (i. e. its apex in normal position di- totaxy follow Gaud and Atyeo (1996) with minor rected posteriorly), with thick bow-shaped branch- corrections for coxal setation by Norton (1998), es; aedeagus sword-shaped and longer than genital and the leg chaetotaxy follows Grandjean (1939). arch; basal sclerite thick, bow-shaped, comparable All measurements are in micrometers (µm). The in width to width of genital arch, occupying ante- taxonomic system and both common and scien- rior position in genital apparatus (Figs. 1B, 4A, B). tific names of birds follow Gill and Donsker (2018). Genital papillae situated on a pair of bow-shaped The abbreviations used in collection numbers plates (derivatives of paragenital apodemes) at and depository designations are as follows: BMOC anterior margin of genital apparatus. Pregenital and UMMZ—Museum of Zoology of the Univer- apodemes present, situated between epimerites IIIa sity of Michigan (Ann Arbor, USA); ZISP—Zoo- and genital apparatus. Opisthoventral shields pres- logical Institute of the Russian Academy of Sci- ent. Adanal apodemes present, fused to posterior ences (Saint-Petersburg, Russia). margins of opisthoventral shields. Adanal shields variable in form, situated anterolateral to adanal SYSTEMATICS suckers. Adanal suckers cylindrical, corolla den- Family Proctophyllodidae Trouessart and tate. Legs IV much thicker than legs III. Tarsus IV Mégnin, 1884 with apical claw-like process, without ventral ex- Subfamily Proctophyllodinae Trouessart tension at base of seta w, modified setae d and e and Mégnin, 1884 button-like. Genus Dendrocolaptobius Mironov and Female. Lobar region of opisthosoma clearly Bermúdez sp. n. separated from remaining part of hysterosoma, 30 New proctophyllodine genus from Dendrocolaptinae opisthosomal lobes well developed, with terminal Dendrocolaptobius lepidocolapti appendages. Anterior hysteronotal and lobar shields Mironov and Bermúdez sp. n. separated by narrow band of striated tegument. (Figs. 1–3, 4A and B) Lobar shield entire. Supranal concavity absent. Type material. Male holotype (BMOC 20- Macrosetae