On Identity of the Type Species of The
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Acarina 17 (1): 89–100 © Acarina 2009 ON IDENTITY OF THE TYPE SPECIES OF THE FEATHER MITE GENUS ANHEMIALGES GAUD, 1958 (ASTIGMATA: ANALGIDAE), WITH THE DESCRIPTION OF A NEW GENUS OF THE ANALGID SUBFAMILY MEGNINIINAE S. V. Mironov Zoological Institute, Russian Academy of Sciences, Universitetskaya quay 1, Saint Petersburg 199034, Russia; e-mail: [email protected] ABSTRACT: This paper demonstrates that the genus Anheminalges Gaud, 1958 (Analgidae: Analginae) is based on the misidenti- fied type species “Anhemialges longipes (Trouessart, 1899)”. As indicated originally (Gaud 1958) and subsequently, this species commonly occurs on the barn swallow, Hirundo rustica (Passeriformes), and some other hirundinid species worldwide. Examination of the holotype specimen of Megninia longipes Trouessart, 1899 described from the horned screamer, Anhima cornuta (Anseri- formes), from South America revealed that it does not correspond to the species occurring on hirundinids and belongs to the subfam- ily Megniniinae rather than Analginae. The species actually involved in the misidentification, Anhemialges gaudi sp. n. (=A. longipes sensu Gaud, 1958, non Trouessart, 1899), is fixed here as the type species of the genus Anhemialges (Article 70.3.2, ICZN). A new genus, Anhimomegninia gen n., is established based on Megninia longipes. The genus Anhemialges is provided with an emended diagnosis and the species Anhimomegninia longipes (Trouessart, 1899), comb. n. is redescribed based on the holotype. KEY WORDS: feather mites, Analgidae, Anhemialges, Anhimomegninia, new taxa, systematics, taxonomic correction INTRODUCTION per Gaud (1953) reported this species from H. The feather mite genus Anhemialges Gaud, smithi in Oubangui-Chari (recently the Central 1958 (Analgidae) is a morphologically well out- African Republic). It is necessary to stress that lined genus of the subfamily Analginae (Gaud Trouessart (1899) actually described M. longipes 1958; Gaud and Till 1961; Gaud and Atyeo 1996). from the horned screamer Anhima cornuta (Lin- As for most Analgidae, representatives of this ge- naeus) (Anseriformes: Anhimidae) in Guyana. It nus live on down feathers and on the downy parts is impossible to guess why Gaud (1958) identified of body covert feathers (Mironov 1999). This ge- the mite species he found on the barn swallow as nus currently includes only four described species M. longipes. The original description (Trouessart from passerines of the families Hirundinidae and 1899) was very brief and without figures, and Zosteropidae. However, taking in account that Gaud probably relied on the redescription of this Atyeo (in: McClure and Ratanaworabhan 1973) species (Bonnet 1924), which included figures of reported unidentified Anhemialges species from the posterior end of opisthosoma and tarsus III of 23 hosts of eight passerine families and even one male. The finding of M. longipes on a host, which species from a piciform host in South-Eastern is phylogenetically very distant from the type host Asia, it is possible to suggest that this genus is and taken from a different continent, also did not probably as diverse as Analges Nitzsch, 1818, disturb Gaud. It is only possible to suggest that he most the species-richest genus in Analgidae, and considered the record of M. longipes from the also has a very wide host range. horned screamer as the result of accidental con- Investigation of the type material of the type tamination, because Trouessart collected feather species of this genus, Anhemialges longipes mite samples from museum skins. In establishing (Trouessart, 1899), revealed confusion in the iden- the new genus Anhemialges, Gaud (1958) even tity of the type species of the genus Anhemialges did not mention the type host of M. longipes. (see below for material and methods). It appeared Further, Gaud and Mouchet (1959) reported that “A. longipes” in sense of Gaud (1958) and A. longipes from the three more species of swal- subsequent authors does not correspond to the lows, H. nigrita Gray G.R., Cecropis abyssinica type specimen, and the genus Anhemialges was unitatis Sclater et Mackworth-Praed, and Psalido- actually based on a misidentified and undescribed procne pristoptera petiti Sharpe et Bouvier, in mite species. Cameroon. It is interesting that these authors indi- Gaud (1958) established the genus Anhemial- cated Hirundo senegalensis Linnaeus as the type ges in the course of systematic investigations of host instead of Anhima cornuta in their paper. Ap- feather mites in Morocco. Originally Gaud includ- parently they based their statement about the host ed in this genus a sole species, Megninia longipes species on the paper of Bonnet (1924), who re- Trouessart, 1899, which he collected in Morocco vised the genus Megninia Berlese, 1881 and listed from the barn swallow Hirundo rustica Linnaeus for M. longipes the three quite different hosts: (Passeriformes: Hirundinidae). In a bit earlier pa- Anh. cornuta, Streptoprocne zonaris Shaw (Apod- 89 S.V. Mironov iformes: Apodidae) and H. senegalensis. No hemialge longipes sensu Gaud, 1958, non Troues- doubts that the first host was taken from the paper sart, 1999) and fix it here as the type species of the of Trouessart (1899), while two others were added genus Anhemialges. I also provide in the present by Bonnet (1924) based on his own material. The paper an emended diagnosis of the genus Anhemi- two latter records apparently represented mites alges, establish a new genus Anhimomegninia gen. from the genera Cypselalges Gaud et Atyeo, 1991 n. with the type species Megninia longipes Troues- (a genus specific to swifts) andAnhemialges sensu sart, 1899 and redescribe the latter species as Anhi- Gaud, 1958, respectively. Thus, the “redescrip- momegninia longipes (Trouessart, 1899) comb. n. tion” of M. longipes given by Bonnet (1924) was MATERIAL AND METHODS apparently based on thee different species. In their review of feather mites living in sub- The type specimen of Megninia longipes was loaned from the Muséum national d’Histoire na- Saharan Africa, Gaud and Till (1961: Fig. 108A, turelle (Paris, France); other specimens used in the B) for the first time illustrated the mite from hirun- present study belong to the collection of the Zoo- dinids that they considered to be A. longipes. In logical Institute of the Russian Academy of Sci- that work they also mentioned that the genus An- ences (Saint Petersburg, Russia). hemialges included two species. Unfortunately The diagnoses and descriptions are given in these authors did not name the second species, and the modern formats used for analgid mites (Gaud it is only possible to guess that they probably and Atyeo 1991; Mironov and Galloway 2002a, meant Megninia aestivalis subintegra Berlese 2002b). General morphological terms, leg and idi- (1883), which was described from the martins osomal chaetotaxy follow Gaud and Atyeo (1996). Delichon urbicum (Linnaeus) and Riparia riparia All measurements are in micrometres (µm). Meas- (Linnaeus) (Hirundinidae) in Italy and was illus- urement standards for particular structures are as trated quite well (Berlese 1883: fasc. 26, No 1). follows: (i) idiosoma is measured from its anterior Since the 1960s, a number of subsequent au- margin to lobar apices in males and to posterior thors reported A. longipes (sensu Gaud, 1958) margin of opisthosoma in females, (ii) prodorsal from various hirundinids, mainly from common shield length is the greatest length from anterior European species (Černy 1967, Arutunjan and end to level of posterior angles and width is the Mironov 1983; Mironov 1983, 1996; Kolarova greatest width of its posterior part; (iii) hystero- and Mitov 2008). In the review of suprageneric soma is measured from the level of the sejugal fur- feather mite taxa of the World, Gaud and Atyeo row to lobar apices in males and to the posterior (1996) once more gave the drawings of the male margin of opisthosoma in females; (iv) hysterono- and female of A. longipes based on specimens tal shield length is the greatest length from the an- from some hirundinids. terior margin to lobar apices; width is measured at Investigation of the holotype specimen of the anterior margin; (v) distance between setae of Megninia longipes deposited in the Trouessart col- different pairs is the shortest distance between the lection (Muséum national d’Histoire naturelle, transverse levels formed by setae of correspond- Paris, France, slide 28i9) has shown that this spe- ing pairs. cies does not correspond to the species that com- Depositories of examined material: TRT — monly occurs on Hirundo rustica. Moreover, the the Muséum national d’Histoire naturelle, Paris, specimen of Megninia longipes described by France; ZISP — the Zoological Institute of the Trouessart (1899) even does not belong to the sub- Russian Academy of Sciences, Saint Petersburg, family Analginae. It represents a quite distinctive Russia. Systematics and scientific names of birds species of the subfamily Megniniinae and deserves follow Dickinson (2003). to be treated as a separate genus related to Megnin- iella Gaud, 1958. Thus, Gaud (1958) actually mis- SYSTEMATICS identified a mite species, which he used as the type Family Analgidae Trouessart et Mégnin, 1884 species for the genus Anhemialges. This species Subfamily Analginae Trouessart et Mégnin, has never been formally described, only its figures 1884 were reproduced in three papers (Gaud and Till Genus Anhemialges Gaud, 1958 1961; Arutunjan and Mironov 1983; Gaud and Gaud 1958: 36; Gaud and Mouchet 1959: Atyeo 1996). Applying Article 70.3.2 of the Inter- 159; Gaud and Till, 1961: 192, Arutunjan and Mi- national Code of Zoological Nomenclature (ICZN ronov 1996: 232; Gaud and Atyeo 1996 (Pt. I): 53, 1999), I describe Anhemialges gaudi sp. n. (=An- (Pt. II): 26. 90 The type species of the feather mites and a new genus of the analgid mites Type species: Megninia longipes non Troues- shield), flanked laterally by wide adanal mem- sart, 1899 by monotypy (ex Hirundo rustica, Mo- branes stretching from adanal shield to bases of rocco) (=Anhemialges gaudi sp. n. ex H. rustica). setae ps2. Area between anal field and posterior Diagnosis. Both sexes.