130. Amblyomma triste Koch, 1844a. A Nearctic and Neotropical species whose adults are most frequently found on Artiodactyla: Bovidae and Cervidae, and Carnivora: Canidae, while larvae and nymphs are usually collected from Rodentia: Caviidae and Cricetidae. All parasitic stages of Amblyomma triste have been found on Carnivora: Felidae, Didelphimorphia: Didelphidae, and Rodentia: Caviidae. Adults and nymphs have been collected from Carnivora: Canidae, and Pilosa: Myrmecophagidae; adult ticks alone have been taken from Artiodactyla: Bovidae, Cervidae and Suidae, and Perissodactyla: Equidae and Tapiridae; nymphs and larvae have been recovered from Rodentia: Cricetidae and Echimyidae, and Passeriformes: Furnariidae, Passerellidae and Thraupidae; nymphs alone have been found on Chiroptera: Vespertilionidae; and larvae alone have been collected from Gruiformes: Rallidae, and Passeriformes: Turdidae (Guglielmone & Robbins 2018, Barbieri et al. 2019; Szabó et al. 2019). Amblyomma triste is a sporadic parasite of humans. M: Kohls (1956b) F: Koch (1844a) N: Estrada-Peña et al. (2002) L: Estrada-Peña et al. (2002) Redescriptions M: Estrada-Peña et al. (2005), Onofrio et al. (2006b), Voltzit (2007), Guzmán-Cornejo et al. (2011), Nava et al. (2017), Dantas-Torres et al. (2019b); see note below F: Koch (1847), Kohls (1956b), Estrada-Peña et al. (2005), Onofrio et al. (2006b), Voltzit (2007), Guzmán-Cornejo et al. (2011), Nava et al. (2017), Dantas-Torres et al. (2019b); see note below N: Estrada-Peña et al. (2005), Martins et al. (2010, 2014), Nava et al. (2017) L: Estrada-Peña et al. (2005) Note: see Amblyomma maculatum for a discussion of the confusion that exists between adults of this species and those of Amblyomma tigrinum and Amblyomma triste. Identification of the immature stages is even more problematic; morphological differentiation of the larvae of these species is almost impossible, as discussed in Estrada-Peña et al. (2005). Nava et al. (2017) state that there is a chance that Amblyomma maculatum and Amblyomma triste are conspecific. This hypothesis is further supported by the molecular and morphological study of Lado et al. (2018), but conclusive evidence is still needed for this proposal, and both species are treated here as provisionally valid. Lado et al. (2018) present four morphotypes of maculatum-triste, with morphotype I being Amblyomma triste sensu stricto.

Published as part of Guglielmone, Alberto A., Petney, Trevor N. & Robbins, Richard G., 2020, Ixodidae (Acari: Ixodoidea): descriptions and redescriptions of all known species from 1758 to December 31, 2019, pp. 1-322 in Zootaxa 4871 (1) on page 126, DOI: 10.11646/zootaxa.4871.1.1, http://zenodo.org/record/4423340