Revista de la Sociedad Entomológica Argentina ISSN: 0373-5680 [email protected] Sociedad Entomológica Argentina Argentina

KUN, MARCELO E.; VEGA, ROCÍO M. First record of the nasal Rallinyssus caudistigmus Strandtmann (: ) from Argentina Revista de la Sociedad Entomológica Argentina, vol. 75, núm. 1-2, 2016, pp. 97-100 Sociedad Entomológica Argentina Buenos Aires, Argentina

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ISSN 0373-5680 (impresa), ISSN 1851-7471 (en línea) Revista de la Sociedad Entomológica Argentina 75 (1-2): 97-100, 2016

First record of the nasal mite Rallinyssus caudistigmus Strandtmann (Acari: Rhinonyssidae) from Argentina

KUN, Marcelo1 E. & Rocío M. VEGA2

1Laboratorio de Zoología, Centro Regional Universitario Bariloche, Universidad Nacional del Co- mahue, Quintral 1250, Bariloche Río Negro, Argentina. E-mail: [email protected] 2Laboratorio de Parasitología, INIBIOMA (UNCo-CONICET), Quintral 1250, Bariloche Río Ne- gro, Argentina.

First record of the nasal mite Rallinyssus caudistigmus Strandtmann (Acari: Rhinonyssidae) from Argentina

RESUMEN. Durante el estudio de la parasitofauna de la gallareta de ligas rojas Fulica armillata del Lago Mari Menuco en el noroeste de la Patagonia argentina, se encon- traron ejemplares de ácaros nasales pertenecientes a Rallinyssus caudistigmus. Este es el registro más austral de R. caudistigmus en F. armillata como nuevo hospedador.

PALABRAS CLAVE. Ácaros Rhinonyssidae. Aves. Rallidae. Argentina.

ABSTRACT. During an examination of the parasite fauna of the Red-gartered Coot Fulica armillata from the Mari Menuco lake in the Northwestern Argentinean Patago- nia, nasal mite specimens belonging to Rallinyssus caudistigmus were found. This is the southernmost record of R. caudistigmus in F. armillata as a new host.

KEY WORDS. Rhinonyssidae. Birds. Rallidae. Argentina.

The most diverse group of nasal is the aquatic birds from the Mari Menuco lake in the Con- Rhinonyssidae (), members of which fluencia department of the Neuquen province in include only blood sucking species living on the Northwestern Argentinean Patagonia, seven Red- mucosa of bird nasal turbinates (Fain, 1994). gartered Coots Fulica armillata (Gruiformes: Ralli- Rhinonyssid genera vary in their degree of host dae) were examined (Neuquen hunting permit num- specificity, some genera being restricted to one ber 127/14 dated 02/28/14 File 4351-001461713). host family and others are found in different or- The interior of the nasal cavities was washed and ders (Pence, 1973). Among the most host-specific the contents and mucosa examined under a ste- rhinonyssids, Larinyssus Strandtmann species reomicroscope. Six females and one deutonymph parasitize gulls and terns (Laridae); Rallinyssus of Rallinyssus caudistigmus Strandtmann were col- Strandtmann species parasitize rails (Rallidae); lected from two F. armillata, preserved in 70% etha- and Rhinoecius Cooreman species parasitize owls nol, cleared in Nesbitt solution and then mounted in (Strigiformes) (Knee et al., 2008). Hoyer´s medium for identification. While the genus Rallinysus is cosmopolitan Members of the genus Rallinyssus are recog- in distribution, and host specificity seems fairly nized easily by the presence of a short peritreme well pronounced (Pence & Young, 1979), in Ar- located dorsally at the posterior end of the body gentina, none of the species of this genus have (Fig. 1). In the adults the dorsum has a podo- been reported so far. The aim of the present somal shield exhibiting varying degrees of scler- study was to report a new locality as well as a otizations (Fig. 2). The gnathosoma shows four new host for the occurrence of the nasal mite pair of ventral setae but has not a deutosternal Rallinyssus caudistigmus. groove. Epistoma can end anteriorly in a strongly During a parasitological survey of patagonian arched and toothed margin. Chelicerae are well

Recibido: 30-I-2016; aceptado: 22-III-2016 97 Revista de la Sociedad Entomológica Argentina 75 (1-2): 97-100, 2016 developed with two strong chelae nearly a fifth Rhinonyssinae and was created by Strandtmann of the total length. Tritosternum and metasternal (1948) while describing specimens of R. caudistig- setae are absent. Sternal and genital plates are mus found in the American coot Fulica americana present in the female (Fig. 3). The anal plate is and the king rail Rallus elegans. Later, Fain (1956) large. The anal pore can be surrounded by a described Rallinyssus congolensis and Rallinys- large circular membrane. The cribrum is present suslimnocaris both hosted by the black crake Lim- on the posterior margin of the anal plate. This nocorax flavirostra. Rallinyssus caudistigmus was genus is nearly always hosted by members of again found in the red-knobbed Coot Fulica cris- the family Rallidae of the order Gruiformes. tata from South Africa (Fain, 1959). Subsequently, Rallinyssus caudistigmus (Fig. 4) has always a fourth species of Rallinyssus was described as the anal circular membrane present (Fig. 5) and R. strandtmanni from a male found in the common the female podosomal plate is well developed, moorhen (Gallinulachloropus) in France (Gretillat, distinctly longer than wide (Fig. 3). There are two 1960). Thereafter Fain described R. gallinulae, pairs of setae on the anterior half of the podosom- again from the same bird species from Belgium al plate and a pair of setae posterior to this plate and created the new genus Rallinyssoides includ- separated by a convexity. All specimens studied ing R. congolensis and R. limnocoracis in it, based fit with the diagnosis of R. caudistigmus. on the anus without a large circular membrane The genus Rallinyssus belongs to the subfamily (Fain, 1960). The first described species of the

Figs. 1-5. Rallinyssus caudistigmus Strandtmann. 1, peritreme; 2,podosomal shield; 3, female genital shield; 4, female, dorsal view; 5, anal membrane.

98 KUN, M. E. & R. M. VEGA. First record of Rallinyssus caudistigmus from Argentina genus for South America was Rallinyssus trappi in Belgium (Fain & Bafort, 1963) and in the Cas- which was included in the genus Rallinyssoides pian Sea (Butenko, 1976). Rallinyssus verheyeni found in the saracura-sanà Pardirallus nigricans was also found in R. limicola and R. elegans from in Brazil (Amaral, 1962). Rallinyssus limnocora- USA (Pence, 1972). The last described Rallinys- cis was again found in the ruddy-breasted crake sus is R. sorae collected in the carolina crake Por- Porzana f. fusca from Malaya (Fain & Nadchatram, zana carolina in USA (Pence & Young, 1979). In 1962). Rallinyssus verheyeni was described after- Canada, R. caudistigmus was again found in the wards in Belgium, in the water rail Rallus aquaticus american coot Fulica americana (Pence, 1975). (Fain, 1963). Rallinyssoides was later synonimized We report here for the first time, a new host with Rallinyssus (Wilson, 1965). In the same work F. armillata for R. caudistigmus in the Argentine hosted by pacific birds were described R. amau- Northwestern Patagonia. Besides the fidelity of rornis from the white-breasted waterhen Amauror- the genus Rallinyssus to the Family Rallidae, nis phoenicurus chinensis in Taiwan, R. cychramus the nasal mite R. caudistigmus most frequently from the crake Porzana unknown species and the parasitizes members of the genus Fulica. These little crake Porzana parva, and R. rallus from the results could be related to the posterior diver- slated-breasted rail Rallus pectoralis both in New sification of the genus Fulica to a parasitization Guinea. Rallinyssus gallinulae was also found in event of a Fulica ancestor by this mite. This is the purple gallinule Porphyrio poliocephalus mela- supported by the different parasitized Fulica nopterus in New Guinea (Wilson, 1965) and in the species and the cosmopolitan distribution of R. buff-banded rail Hypotaenidia philippensis in Aus- caudistigmus. While only four species of Fulica tralia (Domrow, 1965). Rallinyssus amaurornis was have been found with R. caudistigmus, the pos- also found later in Philippines, in the white-browed sibility exists that the lack of records of these crake Amaurornis cinerea (Wilson, 1966). In this mites in the remaining seven species of Fulica same work, also in the Philippines, R. porzanae (Birdlife international, 2016) would result from from the spotless crake (filipina) Zapornia tabuen- the lack of surveys. sis filipina, and R. rallinae from the slaty-legged This is the southernmost record of R. caudistig- crake Rallina eurozonoides eurozonoides (Wilson, mus, corroborating its cosmopolitan distribution. 1966) were described. In an important study of the nasal mites of Queensland birds, R. congolensis ACKNOWLEDGEMENTS was synonymized with R. porzanae and R. gallinu- lae with R. rallus (Domrow, 1969). However, this last We thank the following funding agen- synonymy was later unsupported due to the char- cies; Agencia de Promoción Científica y Téc- acter fixity of the podosomal plate of these species nica PICT 1288-2011 and CONICET PIP No.: (Pence, 1972). Later R. gallinulae was found again 11220110100550, to Dra. Verónica Flores, to the in the purple gallinule Porphyrio poliocephalus Neuquen Fauna Direction, to Richard Greene of in the Caspian Sea (Butenko, 1976). Rallinyssus the Natural History Library Smithsonian Institu- caudistigmus was also found in Gallinula chloro- tion, to Yves Desdevises of the Observatoire pus in Austria (Sixl, 1972), in the virginia rail Rallus Océanologique de Banyuls Université Pierre et limicola in USA (Pence, 1972), in the eurasian coot Marie Curie France,and to Dalva Santos and Sil- Fulica atra in Rumania (Feider & Mironescu, 1973) via Galleti of the Arqivos do Instituto Biológico and in the Caspian Sea (Butenko, 1976), in the in- Universidade de Sao Paulo Brazil and to the dian moorhen Gallinula chloropus indica from Ja- suggestions of an anonymous reviewer. pan (Kadosaka et al., 1987). Rallinyssus caspicus was described in the common moorhen Gallinula chloropus in the Caspian Sea (Butenko, 1976). LITERATURE CITED

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