Gettinger - Comp Parasitol 76(2 2009 pp 162166 A New...

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A New Species of Laelapine Mite (Acari: Parasitiformes: Laelapidae) Associated with the Abrotrichine Rodent Abrothrix longipilis (Waterhouse) (Cricetidae: Sigmodontinae) in Argentina D ONALD G ETTINGER 1 AND M ARCELA L ARESCHI 2,3 1 Harold W. Manter Laboratory of Parasitology, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0514, U.S.A. (e-mail: [email protected]), and 2 Centro de Estudios Parasitolo ´gicos y de Vectores, CEPAVE (CCT-La Plata. CONICET-UNLP) calle 2 N u 584, 1900 La Plata, Argentina (e-mail: [email protected]) ABSTRACT : Androlaelaps abrothrix n. sp., a new laelapine mite (Acari: Parasitiformes: Laelapidae), is described from the pelage of the abrotrichine rodent, Abrothrix longipilis (Waterhouse) (Cricetidae, Sigmodontinae, Abrotrichini), collected from the Andean Patagonia region of Argentina. The description is based on the female, male, deutonymph, and protonymph. KEY WORDS : Androlaelaps abrothrix n. sp., Abrothrix longipilis , mite, Laelapinae, Acari, abrotrichine, Argentina, Patagonia, sigmodontine rodent, ectoparasite. The subgenus Eubrachylaelaps Ewing (Laelapi- dae: Androlaelaps ) currently comprises 8 recognized species (Furman, 1955). Seven of these species are found in North and Central America, primarily infesting neotomine rodents (Rodentia: Cricetidae: Neotominae), but in South America, only a single species, Androlaelaps rotundus (Fonseca, 1936), has been formally described, infesting a wide range of sigmodontine rodents (Rodentia: Cricetidae). Gettin- ger and Owen (2000) demonstrated that A. rotundus is composite in Paraguay, with morphologically distinct species infesting a number of akodontine rodents. In this paper, we describe a distinctive new species infesting Abrothrix longipilis (Waterhouse) (Rodentia: Cricetidae: Sigmodontinae: Abrotrichini) from the province of Neuque ´n, in Argentinean Patagonia. Laelapine mites associated with neotrop- ical rodents and marsupials are known almost exclusively from the female stage; males, deuto- nymphs, protonymphs, and larvae are rarely collected from the pelage of the host. Because our samples included all the life stages, we give preliminary formal descriptions here. MATERIALS AND METHODS Mites were sampled in the field by brushing rodents and were stored in 70 % ethyl alcohol. In the laboratory, mites were mounted individually in Hoyer medium, ringed with Glyptal, and measured with a stage-calibrated ocular micrometer. Measurements are presented in micrometers ( m m) as mean values 6 the standard deviation followed by range values in parentheses. We follow Gettinger and Owen (2000) for setae nomenclature, Wilson and Reeder (2005) for mammalian species names, and D’Elı´a et al. (2007) in the use of their proposed tribe ‘‘Abrotrichini.’’ RESULTS Androlaelaps abrothrix n. sp. (Figs. 1–8) Diagnosis Females of A. abrothrix are similar in size to A.
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