A reassessment of the taxonomic status of Amblyomma cajennense based on the morphological analyses of ticks from the whole distribution area of the species resulted in the redescription of A. cajennense, the validation of 2 species which had been reduced to synonymy in the past, Amblyomma mixtum and Amblyomma sculptum, and the description and definition of 3 new species, Amblyomma tonelliae n. sp., Amblyomma interandinum n. sp., and Amblyomma patinoi n. sp. This study provides descriptions and redescriptions, scanning electron microscopic and stereomicroscopic images, updated synonymies, information on geographical distributions, and host associations for each of the 6 species. Amblyomma cajennense s.s. is found in the Amazonian region of South America, A. interandinum is reported from the northern part of the Inter-Andean valley of Peru, A. mixtum is present from Texas (U.S.A.) to western Ecuador, A. patinoi occurs in the Eastern Cordillera of Colombia, A. tonelliae is associated with the dry areas of the Chaco region which spans from central-northern Argentina to Bolivia and Paraguay, whereas A. sculptum is distributed from the humid areas of northern Argentina, to the contiguous regions of Bolivia and Paraguay and the coastal and central-western states of Brazil.
Bibliographical noteFunding Information:
We acknowledge the financial support of INTA, Asociación Cooperadora EEA-INTA Rafaela, CONICET, and PICT1298 to SN, AJM, and AAG. We wish to thank Jonathan Coddington (Smithonian Institution) for letting us use his BK Plus Digital Lab System and for teaching us how to use it, David Furth (Smithsonian Institution) for providing technical help and logistical support, and Patricia Sarmiento (Servicio de Microscopía Electrónica, Museo de La Plata, Argentina) for preparing the scanning electron micrographs. We would like to thank Jason Dunlop, Luca Bartolozzi, and Nikolaj Scharff for sending us type materials. This study was funded in part through grant NSF1026146 to L. Beati. We also wish to thank the anonymous reviewers for their constructive contributions. ICPS publication number 2.
- Amblyomma cajennense species group
- New species
- Taxonomic status