Morphological descriptions of the nymph and adults of Ornithodoros clarki, the larva and nymph of Ornithodoros rondoniensis, with notes on their phylogenetic relationships
Por:
Labruna, Marcelo B., Nava, Santiago, Rebollo-Hernandez, Andrea, Guzman-Cornejo, Carmen, Hernandez, Ligia V., Dominguez, Lillian, Munoz-Leal, Sebastian, Venzal, Jose M.
Publicada:
1 jun 2021
Ahead of Print:
1 mar 2021
Categoría:
Parasitology
Resumen:
Based on tick specimens collected recently in Mexico, Nicaragua, Panama
and Brazil, we provide morphological descriptions of the nymph and
adults of Ornithodoros clarki Jones & Clifford, 1972 from the first
three countries, and the larva and nymph of Ornithodoros rondoniensis
(Labruna, Terassini, Camargo, Brandao, Ribeiro & Estrada-Pena, 2008)
from Brazil. Also, an analysis of mitochondrial 16S rDNA sequences was
performed to analyze the phylogenetic relationships of these tick
species. Adults and nymphs of O. clarki and O. rondoniensis are unique
among the Argasidae family by presenting exceptionally large spiracular
plates with small goblets, and an integument with smooth polygonal
mammillae. However, these two species are morphologically distinct based
on specific patterns of coxal folds, idiosomal mammillae and pilosity,
and female genital flap. In contrast, the larvae of O. clarki and O.
rondoniensis are morphologically identical, except for a general larger
size of the former species; this slight difference is corroborated by
Principal Component Analysis (PCA) by using 40 morphometric variables.
Phylogenetic analyses including 16S rDNA partial sequences of different
Ornithodoros taxa from Central and South America indicate that O.
rondoniensis from Brazil diverges from O. clarki from Mexico, Nicaragua
and Panama. However, phylogenetic distance separating both alleged
species is similar or slightly lower than the distances depicted for
conspecific populations of a few other Ornithodoros species.
Nonetheless, our primary criterion to maintain O. rondoniensis as a
valid species is because its adult and nymphal stages do present
distinct morphological traits that easily distinguish these postlarval
stages from O. clarki.
Filiaciones:
Univ Sao Paulo, Fac Med Vet & Zootecnia, Dept Med Vet Prevent & Saude Anim, Av Prof Orlando Marques Paiva 87, BR-05508270 Sao Paulo, SP, Brazil
INTA Rafaela, EEA, CONICET, IDICAL,INTA, Rafaela, Santa Fe, Argentina
Univ Nacl Autonoma Mexico, Dept Biol, Fac Ciencias, Lab Acarol, Mexico City, DF, Mexico
Univ Nacl Autonoma Nicaragua, Escuela Ciencias Agr & Vet, Campus Agr Leon,AP 68, Leon, Nicaragua
Inst Conmemorat Gorgas Estudios Salud, Dept Invest Entomol Med, Panama City, Panama
AIP, Estn Cient Coiba, Coiba, Panama
Univ Concepcion, Fac Ciencias Vet, Dept Patol & Med Prevent, Chillan, Nuble, Chile
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