Ornithodoros cerradoensis n. sp. (Acari: Argasidae), a member of the Ornithodoros talaje (Guerin-Meneville, 1849) group, parasite of rodents in the Brazilian Savannah

Autor(es)

Munoz-Leal, Sebastian ^[1] ; Martins, Maria M. ^[2] ; Nava, Santiago ^{[3, 4]} ; Landulfo, Gabriel A. ^[5] ; Simons, Simone M. ^[5] ; Rodrigues, Vinicius S. ^[2] ; Ramos, Vanessa N. ^[2] ; Suzin, Adriane ^[2] ; Szabo, Matias P. J. ^[2] ; Labruna, Marcelo B. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Med Vet & Zootecnia, Dept Med Vet Prevent & Saude Anim, Av Prof Orlando Marques Paiva, 87, Cidade Univ, BR-05508270 Sao Paulo, SP - Brazil

^[2] Univ Fed Uberlandia, Fac Med Vet, Lab Ixodol, Av Amazonas S-N, Campus Umuarama, Bloco 6T, BR-38405302 Uberlandia, MG - Brazil

^[3] Inst Nacl Tecnol Agr, Estn Expt Agr Rafaela, CC 22, RA-2300 Rafaela, Santa Fe - Argentina

^[4] Consejo Nacl Invest Cient & Tecn, CC 22, RA-2300 Rafaela, Santa Fe - Argentina

^[5] Inst Butantan, Lab Parasitol, Av Vital Brasil 1500, BR-05503900 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: TICKS AND TICK-BORNE DISEASES; v. 11, n. 5 SEP 2020.
• Citações Web of Science: 0

Resumo

Ornithodoros cerradoensis n. sp. is described from field-collected and laboratory reared nymphs, males, females, and larvae parasitizing the rodents Cavia aperea and Thrichomys sp. in the Brazilian Savannah. This new species is morphologically and genetically related with the Ornithodoros talaje group and can be separated from other Neotropical species using the following combination of characters: larva with 18 pairs of setae on dorsum (seven anterolateral, four central and seven posterolateral), hypostome with median dentition 2/2; adults provided with large mammillae; dorsal disks surrounded by bulked marginal ridges delimiting barely pebbled areas; three disks in the anterolateral file, and median disk not merging with the posteromedian file. Feeding assays in the la-boratory demonstrated that (1) larvae of O. cerradoensis are slow-feeders (similar to 6 days), (2) first nymphal instar (N1) molts to second instar (N2) without feeding, and (3) N2 and third nymphal instar (N3) engorge rapidly (min-utes). With the exception of Ornithodoros hasei nymphs that depict flattened bodies, O. cerradoensis N1, N2, and N3 highly resemble homologous instars of other species in O. talaje sensu lato, therefore are not suitable for morphological comparisons within the group. In addition to morphological signature of larvae and adults that separate this new species; results of cross-mating attempts between O. cerradoensis and Ornithodoros guaporensis a morphologically and phylogenetically closely related species that also parasitizes rodents in the Brazilian Savannah; a Principal Component Analysis using larval characters; and a phylogenetic analysis using mi-tochondrial markers, support O. cerradoensis as an independent lineage within the Ornithodorinae. (AU)

• Processo FAPESP: 18/02521-1 - Pesquisa de espiroquetas do grupo da febre recorrente (Spirochaetaceae: Borrelia) em carrapatos do gênero Ornithodoros (Acari: Argasidae) parasitas de humanos no Brasil
• Beneficiário: Sebastián Alejandro Munoz Leal
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 19/17960-3 - Técnicas de cultivo avançadas, sequenciamento de última geração e inmunoblot aplicado ao estudo de uma espiroqueta do grupo da febre recorrente brasileira
• Beneficiário: Sebastián Alejandro Munoz Leal
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado