Research Article |
Corresponding author: Daniel R. Gustafsson ( kotatsu@fripost.org ) Academic editor: Susanne Randolf
© 2019 Daniel R. Gustafsson, Lucie Oslejskova, Tomas Najer, Oldrich Sychra, Fasheng Zou.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Gustafsson DR, Oslejskova L, Najer T, Sychra O, Zou F (2019) Redescriptions of thirteen species of chewing lice in the Brueelia-complex (Phthiraptera, Ischnocera, Philopteridae), with one new synonymy and a neotype designation for Nirmus lais Giebel, 1874. Deutsche Entomologische Zeitschrift 66(1): 17-39. https://doi.org/10.3897/dez.66.32423
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Thirteen species of chewing lice in the Brueelia-complex are redescribed and illustrated. They are: Brueelia blagovescenskyi Balát, 1955, ex Emberiza schoeniclus (Linnaeus, 1758); B. breueri Balát, 1955, ex Chloris chloris (Linnaeus, 1758); B. conocephala (Blagoveshchensky, 1940) ex Sitta europaea (Linnaeus, 1758); B. ferianci Balát, 1955, ex Anthus trivialis (Linnaeus, 1758); B. glizi Balát, 1955, ex Fringilla montifringilla Linnaeus, 1758; B. kluzi Balát, 1955, ex Fringilla coelebs Linnaeus, 1758; B. kratochvili Balát, 1958, ex Motacilla flava Linnaeus, 1758; B. matvejevi Balát, 1981, ex Turdus viscivorus Linnaeus, 1758; B. pelikani Balát, 1958, ex Emberiza melanocephala Scopoli, 1769; B. rosickyi Balát, 1955, ex Sylvia nisoria (Bechstein, 1792); B. vaneki Balát, 1981, ex Acrocephalus schoenobaenus (Linnaeus, 1758); Guimaraesiella haftorni (Balát, 1958) ex Turdus iliacus Linnaeus, 1758; G. lais (Giebel, 1874) ex Luscinia megarhynchos (Brehm, 1831). Redescriptions are made from type material where available. Holotypes are identified in Balát’s material when possible, and lectotypes are designated for B. blagovescenskyi, B. breueri, B. glizi, B. ferianci, B. kluzi, B. kratochvili, B. pelikani, and B. rosickyi; a neotype of Nirmus lais Giebel, 1874 is designated. Brueelia weberi Balát, 1982, is placed as a synonym of Brueelia conocephala (Blagoveshchensky, 1940).
Ischnocera , lectotype, neotype, Philopteridae , Phthiraptera , redescription
Correct identification of chewing lice (Phthiraptera) to species level is often hampered by inadequate species descriptions. During work on a recent revision of the species-rich Brueelia-complex (
To partially address the difficulties in identifying lice in this complex, we here redescribe 13 species of chewing lice in the Brueelia-complex: 10 species in the genus Brueelia Kéler, 1936 and two species in the genus Guimaraesiella Eichler, 1949. Redescriptions of 10 of these species are based on type material, complemented in some cases by non-type material. In most species, the present status of Balát’s specimens is addressed, including notes on specimens that must be regarded as lost. To stabilize the nomenclature and anchor the descriptions and illustrations here to specific specimens, we also designate a number of lectotypes and paralectotypes from Balát’s syntype series.
In addition, we redescribe Nirmus lais Giebel, 1874, based on specimens in Balát’s collection, and designate one of these as the neotype of this species. Moreover, we here consider one proposed species name, Brueelia weberi Balát, 1982, as a synonym of an older species name, Degeeriella conocephala Blagoveshtchensky, 1940. We take the opportunity to redescribe D. conocephala as well, based on non-type specimens in Balát’s collection.
With these redescriptions, only one species of Brueelia and Guimaraesiella described by Balát remain without modern redescriptions: Guimaraesiella tovornikae (Balát, 1981). We were unable to find any specimens of G. tovornikae at the Moravian Museum, and the types must therefore be assumed to be lost.
We examined slide-mounted specimens in František Balát’s collection deposited at the Moravian Museum, Brno (
Measurements were made in Quick PHOTO MIKRO 3.1 (Promicra, Prague, Czechia). Measurements are given in millimetres for the following dimensions: AW = abdominal width (at segment V); HL = head length (at midline); HW = head width (at temples); PRW = prothoracic width (at posterior end); PTW = pterothoracic width (at posterior end); TL = total length (at midline). Terminology of chaetotaxy and morphological structures follows
Host taxonomy follows
In the original descriptions of most of the species redescribed here, Balát explicitly mentioned a single male and a single female as type specimens but listed all other specimens examined as “other material”. Article 72.4.6 of the International Code of Zoological Nomenclature (1999) states that if an author establishing a new species-group taxon uses the term “type” or its equivalents for some specimens, but also lists other specimens, these additional specimens are excluded from the type series. Balát appears to have been unaware of this, and labeled several non-type slides as “paratypes”, including some slides deposited in other collections. These specimens have no special status, and are not either paratypes or paralectotypes.
Philopterus Nitzsch, 1818: 288 (in partim).
Nirmus Nitzsch, 1818: 291 (in partim).
Degeeriella Neumann, 1906: 60 (in partim).
Painjunirmus Ansari, 1947: 285.
Allobrueelia Eichler, 1951: 36 (in partim).
Nigronirmus Złotorzycka, 1964: 248.
Spironirmus Złotorzycka, 1964: 261.
Serinirmus Soler Cruz, Rodríguez, Florido-Navío and Muñoz Parra, 1987: 244.
Brueelia rossittensis Kéler, 1936: 257 [= Nirmus brachythorax Giebel, 1874: 134] (by original designation).
Brueelia blagovescenskyi Balát, 1955: 504.
Emberiza schoeniclus (Linnaeus, 1758), reed bunting (Emberizidae).
Hodonín, “Kapřiska”, Czechia.
Both sexes. Head trapezoidal (Fig.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Lectotype ♂, Hodonín, “Kapřiska”, Czechia, 2 Apr. 1949, F. Balát, 404a (
Non-types. 1♀, same data as lectotype, 404c (
The lectotype male and paralectotype female (404a–b) are mounted on slides using a second slide used as a cover slide, which blurs the outline of the thoracic and abdominal plates and prevents using higher magnifications. Accurate illustration of the male genitalia is impossible without remounting the specimen, which was not attempted; the genitalia are therefore illustrated approximately. Moreover, smaller setae are very hard to see, and especially smaller abdominal setae of the male may have been overlooked. The female 404b lacks a subgenital plate. For the head and female illustrations, the non-type female specimen (slide 404c) was used. Fresh collections are needed to establish the correct abdominal and leg chaetotaxy of males of this species, as well as the shape of the male genitalic elements.
Brueelia pelikani Balát, 1958: 414.
Emberiza melanocephala Scopoli, 1769, black-headed bunting (Emberizidae).
Sliven, Bulgaria.
Both sexes. Head slender, rounded dome-shaped (Fig.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Lectotype ♂, Sliven, Bulgaria, 24 May 1957, F. Balát, 969a (
The abdomen of this lectotype male is unfortunately disrupted distally, which has affected the genitalia. In the paralectotype male 934, the mesosome is partially obscured by gut content, and the shape of the proximal mesosome cannot be seen clearly. We have illustrated the mesosome as seen in the lectotype, but the other genital elements as seen in the paralectotype male (934).
Brueelia breueri Balát, 1955: 505.
Chloris chloris (Linnaeus, 1758), European greenfinch (Fringillidae).
Gabčíkovo, Slovakia.
Both sexes. Head flat dome-shaped (Fig.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Lectotype ♂ Gabčíkovo, Slovakia, 25 Mar. 1954, F. Balát, 676 (
Non-types. 1♀, same data as lectotype, 676 (
Both antennae of the lectotype male are folded underneath the head and seemingly squashed. We have here reversed the dorsal view of the antenna and illustrated it in a more natural position; the antenna in the ventral view is illustrated as in the specimen. However, in both cases the antennae are likely narrower than illustrated here. As both antennae are displaced, the precise location of antennal setae cannot be established, and these have therefore not been illustrated here. Additional material is needed to fully redescribe B. breueri.
Brueelia glizi Balát, 1955: 509.
Fringilla montifringilla Linnaeus, 1758, brambling (Fringillidae).
Hodonín, Czechia.
Both sexes. Head flat dome-shaped (Fig.
Brueelia glizi Balát, 1955, ex Fringilla montifringilla Linnaeus, 1758 22 Male head, dorsal and ventral views 23 Male genitalia, dorsal view, except mesosome which is distorted in specimen and here illustrated in dorso-lateral view 24 Male mesosome, ventro-lateral view 25 Male paramere, dorsal view 26 Female subgenital plate and vulval margin, ventral view.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Lectotype 1♂, Hodonín, Czechia, 10 Feb. 1952, F. Balát, 672a (
Non-type material. 6♀, same data as lectotype, F. Balát, 647, 672b–c (
Additional material is necessary to describe the male genitalia accurately.
Brueelia kluzi Balát, 1955: 512.
Fringilla coelebs Linnaeus, 1758, chaffinch (Fringillidae).
Lednice, Czechia.
Both sexes. Head flat-dome shaped (Fig.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Lectotype 1♂, Lednice, Czechia, 26 Mar. 1953, F. Balát, 1138 (
Non-type material. 3♂, 8♀, same data as lectotype (
All examined specimens in Brno are poorly cleared, and many are still attached to feather fragments that further obscure the morphology. As a result, thoracic and abdominal chaetotaxy and plates are not always clearly visible, and are here illustrated as accurately as possible. Vulval setae only clearly visible in one female, and range of variation may be greater than given above if more specimens are examined.
Degeeriella conocephala Blagoveshtchensky, 1940: 64.
Brueelia
conocephalus
(Blagoveshtchensky, 1940);
Brueelia
conocephala
(Blagoveshtchensky, 1940);
Brueelia weberi Balát, 1982: 44, new synonymy.
Sitta europaea caucasica Reichenow, 1901, Eurasian nuthatch (Sittidae).
Alexeyevka, Talysh Lowlands, Lenkoran province [= Lankaran], Azerbaijan.
Sitta europaea caesia Wolf, 1810. Sitta europaea rubiginosa Tschusi & Zarodny, 1905. Parus major Linnaeus, 1758. See
Both sexes. Head rounded triangular (Fig.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Holotype ♀ of Brueelia weberi, Serrahn, [Kreis Neustrelitz, Germany], 7 Oct. 1977, F. Balát, 1448 (
Non-type material. Ex Sitta europaea caesia: 10♂, 19♀, Košice, Slovakia, 5 Nov. 1953, F. Balát, 1080 (
We have examined Balát’s type and non-type material identified as B. weberi, and compared these with his extensive collection of B. conocephala from Sitta europaea caesia. No diagnostic characters that could separate these two species have been found, and most measurements for specimens from P. major fall within the range of the measurements for specimens from S. europaea. We therefore consider B. weberi to be a synonym of B. conocephala. There is enough variation in the head shape and measurements of Balát’s specimens of B. conocephala to accommodate the perceived differences in dimensions reported by
Balát collected B. weberi from several localities, and it would appear that this species is well established on the host, Parus major. This is in contrast to the only other material known from birds in the P. major-complex reported by
Interestingly, the “paratype” male on slide 1411 (Břeclav – Kančí obora, Czechia, 5 Mar. 1954, F. Balát, 1411,
Brueelia ferianci Balát, 1955: 508.
Nigronirmus
ferianci
(Balát, 1955);
Anthus trivialis trivialis (Linnaeus, 1758), tree pipit (Motacillidae).
Nesyt, Czechia.
Both sexes. Head trapezoidal (Fig.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Lectotype ♂, Nesyt, Czechia, 8 Apr. 1953, F. Balát, 1062 (
Non-type material. 1♂, 6♀, same data as holotype, F. Balát, 1062, 1127, 1177 (
The width of the frons differs somewhat between different specimens. The head is here illustrated from the holotype, whereas the full-body illustration is from a more narrow-headed specimen, to illustrate the variation in this species. Most specimens examined are more similar to the narrow-headed illustration. We do not presently consider these differences to be of any taxonomic importance, as the specimens we have examined are otherwise similar. However, fresh material from a number of host subspecies and populations may reveal that the material we have examined represents multiple species. Antennae in holotype and paratype males folded under the head, and here illustrated based on non-type material.
Brueelia kratochvili Balát, 1958: 413.
Nigronirmus
kratochvili
(Balát, 1958);
Motacilla flava feldegg Michahelles, 1830, yellow wagtail (Motacillidae).
Burgas, Bulgaria.
Motacilla flava Linnaeus, 1758, yellow wagtail. Motacilla tschutschensis macronyx (Stresemann, 1920), Eastern yellow wagtail. Motacilla alba Linnaeus, 1758, white wagtail, new host record.
Both sexes. Head slender, trapezoidal (Fig.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Lectotype ♂, Burgas, Bulgaria, 29 May 1957, F. Balát, 917a (
Non-type material. Ex Motacilla flava ssp.: 4♂, 4♀, Velké Kapušany, Slovakia, 18 Apr. 1959, F. Balát, 1485, 1486, 1487, 1488 (
Ex M. tschutschensis macronyx: 1♀, Bangkok, Thailand, 18 Sep. 1964, H.E. McClure, H-0953 (
Ex M. alba: 2♂, 1♀, Krišovská Liesková - Krížany, Slovakia, 14 Apr. 1959, F. Balát, 1215, 1216, 1217 (
In addition, there are two slides at
Notably, specimens from Asian subspecies of M. alba we have seen differ from the present material in the extent of head pigmentation, the male abdominal chaetotaxy, and the shape of the male genitalia, including both the parameres and the mesosome. These populations may represent a different species of Brueelia, and are not included under B. kratochvili here.
Brueelia rosickyi Balát, 1955: 517.
Sylvia nisoria (Bechstein, 1792), barred warbler (Sylviidae).
Těšice u Hodonína, Czechia.
Both sexes. Head slender, rounded triangular (Fig.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Lectotype ♂, Těšice u Hodonína, Czechia, 15 May 1953, F. Balát, 1133a (
Non-type material. 1♂, 14♀, same data as lectotype, F. Balát, 1133c–q (
Brueelia vaneki Balát, 1981: 277.
Acrocephalus schoenobaenus (Linnaeus, 1758), sedge warbler (Acrocephalidae).
Velký Dvůr u Pohořelic, Czechia.
Both sexes. Head elongated, rounded-trapezoidal (Fig.
Brueelia vaneki Balát, 1981, ex Acrocephalus schoenobaenus (Linnaeus, 1758) 64 Male head, dorsal and ventral views 65 Male genitalia, dorsal view, except mesosome which is distorted in specimen and here drawn in dorso-lateral view 66 Male mesosome, ventro-lateral view 67 Male paramere, dorsal view 68 Female subgenital plate and vulval margin, ventral view.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Holotype ♀, Velký Dvůr u Pohořelic, Czechia, 18 June 1978, F. Balát, 1519 (
Brueelia matvejevi Balát, 1981: 278.
Turdus viscivorus Linnaeus, 1758, mistle thrush (Turdidae).
Zabljak, Montenegro.
Both sexes. Head flat dome-shaped (Fig.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Holotype ♂, Žabljak, Montenegro, 3 July 1958, S. Brelih (6342), F.B. 1523. Paratypes. 1♀ same collection data as holotype, S. Brelih (6344), F.B. 1524. 3♂, 1♀ Brno – Obora, Czechia, 15 Jun. 1954, F. Balát, 1416, 1417a, b, 1419.
Non-types examined. Ex Turdus viscivorus viscivorus: 2♂, 2♀, Crno Jez, Durmitor, Montenegro, 8 July 1958, S. Brelih, 333, 1990, 1992–1993 (
Nirmus Nitzsch, 1818: 291 (in partim).
Degeeriella Neumann, 1906: 60 (in partim).
Brueelia Kéler, 1936: 257 (in partim).
Xobugirado
Allobrueelia Eichler, 1951: 36 (in partim).
Allobrueelia Eichler, 1952: 74 (near-verbatim redescription).
Allonirmus Złotorzycka, 1964: 263.
Nitzschnirmus Mey & Barker, 2014: 101.
Docophorus subalbicans Piaget, 1885: 6 [= Docophorus papuanus Giebel, 1879: 475], by original designation.
Allobrueelia haftorni Balát, 1981: 280.
Guimaraesiella
haftorni
(Balát, 1981);
Turdus iliacus Linnaeus, 1758. redwing (Turdidae).
Sokolnice, Czechia.
Both sexes. Head broad, rounded dome-shaped (Fig.
Male. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Holotype ♀, Sokolnice, Czechia, 1 Apr. 1958, F. Balát, 1242 (
The Guimaraesiella of European thrushes are all morphologically very similar, differing mainly in the male genitalia and the head shape. Moreover, we have seen some specimens of Guimaraesiella from non-type host species in European material (D. Gustafsson unpublished data). Unless these records are the result of contamination or misidentification of the host, this may suggest that at least some European species of Guimaraesiella occur on more than one host species. Relying on host relationships to obtain the species identity of Guimaraesiella samples from thrushes may thus be unreliable. However, almost all species of Guimaraesiella, including those from thrushes, are poorly described, and presently unidentifiable. Redescriptions of Guimaraesiella amsel (Eichler, 1951), Guimaraesiella marginata (Burmeister, 1838), Guimaraesiella turdinulae (Ansari, 1956), and Guimaraesiella viscivori (Denny, 1842) are urgently needed to establish the species limits in this group.
Nirmus …. Giebel, 1866: 366 [species 25].
Nirmus lais Giebel, 1874: 143.
Degeeriella
lais
Giebel, 1874;
Brueelia
lais
(Giebel), 1874;
Brueelia (Allobrueelia) lais
(Giebel);
Allonirmus
lais
(Gieb.);
Guimaraesiella
lais
(Giebel, 1874);
Allobrueelia
lais
(Giebel, 1874);
Luscinia megarhynchos (Brehm, 1831), common nightingale (Muscicapidae).
None given in original, but likely Germany. Neotype (designated herein) is from Nejdek u Lednice, Czechia.
Both sexes. Head broad, rounded pentagonal (Fig.
Male. Sternites II–IV partially ruptured and displaced in neotype, and here illustrated approximately. Thoracic and abdominal chaetotaxy as in Figure
Female. Thoracic and abdominal chaetotaxy as in Figure
Neotype 1♂, Nejdek u Lednice, Czechia, 6 May 1953, F. Balát, 1114 (
Giebel’s description of N. lais was based on a single female, and does not contain any specific character that can be used to place N. lais in either Brueelia or Guimaraesiella with certainty.
Apart from the specimens listed here, we have been unable to locate any specimens of Brueelia-complex lice from L. megarhynchos in any of the museum collections we have searched (see list in
To stabilize the nomenclature of the lice found on thrushes and flycatchers, we here designate a neotype for Nirmus lais Giebel, 1874, from Balát’s specimens. These specimens all belong to Guimaraesiella (sensu
Allonirmus tovornikae Balát, 1981: 281.
Nigronirmus atricapillae Soler-Cruz et al., 1984: 147.
Brueelia atricapillae Soler-Cruz et al., 1984; Price et al. 2003: 153 (nec B. atricapilla Cicchino, 1983: 290).
Brueelia neoatricapillae Price, Hellenthal & Palma, 2003 [in Price et al.: 153].
Guimaraesiella
tovornikae
(Balát, 1981);
Sylvia atricapilla (Linnaeus, 1758), blackcap (Sylviidae).
Antošovice, Czechia.
This is unfortunate, as A. tovornikae is considered to be a senior synonym of Nigronirmus atricapillae Soler-Cruz et al., 1984, from the same host (
In a wider perspective, using this approach in the Brueelia-complex is not without problems.
The species redescribed here show similar patterns. Most taxa treated here are fairly typical species for their respective host families. For instance, both B. ferianci and B. kratochvili have the head shape typical of Brueelia species parasitizing boreal (but not tropical or southern; Gustafsson and Bush in prep.) motacillids. The extensive dark pigmentation patterns of B. breueri are also typical of the species of Brueelia parasitizing many boreal fringillids.
However, the head shape of B. blagovescenskyi (Fig.
Descriptions of new species in large genera like Brueelia and Guimaraesiella thus need to be done with caution, as the close relatives may parasitize different host families (
Work was supported by the Introduction of Full-time High-level Talent Fund of the Guangdong Academy of Sciences grant 2018GDASCX-0809 to DRG, and the Guangdong Forestry Special Project Grant 0877-16GZTP01D060 and National Natural Science Foundation of China grant 31672265 to FZ. Igor Malenovsky (