Topographical and numerical study of the idiosomal integumentary structures of the larva of four neotropical species of Amblyomma Koch, 1844 (Acari: Ixodidae) - Barbieri, Fabio da Silva; Chacón, Samuel Candanedo; Labruna, Marcelo Bahia; Battesti, Darci Moraes Barros; Faccini, João Luiz Horácio; Famadas, Kátia Maria (Systematic Parasitology, 2007)