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Table 2 Summary of distinctive morphological character combinations in the four different morphotypes

From: The Amblyomma maculatum Koch, 1844 (Acari: Ixodidae) group of ticks: phenotypic plasticity or incipient speciation?

Morphotype Origin Males Males Males + Females Males Females Females
Scutes on ventral festoons Postero-median spot in relation to width of adjacent stripe Tibial armature Spiracular plates (width of projection in relation to width of adjacent festoon) Spiracular plates (width of projection in relation to width of adjacent festoon) Brown central spot
I UY, AR, BR Present Wider 1 spine + 1 stout seta Oval, with short wide projection (± 1 festoon) Comma-shaped, wide (± 1 festoon) Reaching posterior margin of scutum
II USA, CO, CR, VE Present, less conspicuous Wider 2 spines of almost equal length Comma-shaped with narrow projection (± 1/2 festoon) Comma-shaped, with narrow projection (± 1/2 festoon) “Mostly” reaching posterior margin of scutum
III USA (AZ), MX Present “Mostly” wider 1 spine + 1 fine seta Comma-shaped, elongated, with narrow projection (± 1/2 festoon) Comma-shaped, with narrow projection (± 1/3 festoon) Reaching posterior margin of scutum
IV PE, CH, EC Present Wider 2 spines of unequal length Comma-shaped, elongated, with narrow projection (± 1/2 festoon) Comma-shaped, with narrow projection (± 1/2 festoon) “Mostly” reaching posterior margin of scutum
  1. Abbreviations: AR, Argentina; BR, Brazil; CO, Colombia; CR, Costa Rica; VE, Venezuela; USA, United States; AZ, Arizona; MX, Mexico; PE, Perú; CH, Chile; EC, Ecuador