Ixodes silvanus n. sp. (Acari: Ixodidae), a new member of the subgenus Trichotoixodes Reznik, 1961 from northwestern Argentina

BOTTERO, MARIA N. SARACHO; BEATI, LORENZA; VENZAL, JOSÉ M.; GUARDIA, LEONOR; THOMPSON, CAROLINA S.; MANGOLD, ATILIO J.; GUGLIELMONE, ALBERTO A.; NAVA, SANTIAGO

Ticks and Tick-borne Diseases

Elsevier

Año: 2021 vol. 12

1877-959X

Females, nymphs, and larvae of Ixodes silvanus n. sp. collected from birds and from the vegetation in northwesternArgentina (Yungas Phytogeographic Province) are described herein. The new species belongs to thesubgenus Trichotoixodes (Acari: Ixodidae). The female is diagnosed by a combination of the following characters:scutum with setae moderately long and more numerous in central field, fewer and moderately long setae onlateral fields, and inconspicuous setae in anterior field; basis capituli subtriangular dorsally; porose areas largeand irregular in shape, lacking distinct margins; auriculae with straight edges diverging posterolaterally andending with small blunt processes; hypostome narrow and pointed with dental formula 4/4 in the anterior third,then 3/3 and 2/2 near the base; coxae I with two spurs, sub-equal in size, internal slightly slimmer than external.The nymph is diagnosed by notum with numerous and long setae, ventral surface covered by numerous whitishsetae, scutum with short scapulae and few and shallow punctations, setae on scutum few, short and irregularlydistributed, basis capituli sub-triangular dorsally with posterior margin straight, cornua large and directedpostero-laterally, auriculae large and projected laterally, lateral margin of basis capituli above auriculae with alateral and triangular projection, hypostome pointed with dental formula 3/3 in the anterior third and then 2/2,and coxa I with two short, sub-equal, triangular spurs. The diagnostic characters of the larva are: basis capitulidorsally sub-triangular with lateral angles acute and posterior margin straight, auriculae as large triangularlateral projections, hypostome with apex bluntly pointed and dental formula 3/3 in the anterior third and then 2/2, coxa I with two short, sub-equal, triangular spurs, and pattern of dorsal and ventral body setae. This newspecies is phylogenetically related to Ixodes brunneus, Ixodes turdus and Ixodes frontalis, and the principal hosts forall its parasitic stages are birds.