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|+GENERIC CLASSIFICATION OF TICKS |- |rowspan=9|Rostrum terminal.
Dorsal shield present.
Sexual dimorphism marked ||rowspan=9|${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$ ||style="text-align:center;" rowspan=9|Family Ixodidæ ||rowspan=9|${\displaystyle \scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \\\ \\\ \\\ \ \end{matrix}}\right.}}$ ||Anal groove surrounding anus in front. ||style="text-align:center;" |Prostriata Ixodinæ || ${\displaystyle \scriptstyle {\left\{{\begin{matrix}\ \\\\\ \ \end{matrix}}\right.}}$||Inornate, without eyes and without festoons. Spiracles round or oval. Palps of variable form. Tarsi without spurs. Sexual dimorphism pronounced. In the ♂ the venter is covered by non-salient plates; one pregenital, one median, one anal, two adanal, and two epimeral plates. Parasitic on Ungulata, carnivora, rodents, marsupials (kangaroo), bats, and birds. ||${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$ ||style="text-align:center;"|1. Genus
Ixodes. |- |rowspan=8|Anal groove containing anus behind. ||style="text-align:center;" rowspan=8|Metastriata ||rowspan=8|${\displaystyle \scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \ \end{matrix}}\right.}}$ ||(a) Brevirostrata. Rostrum short.
Inornate, without eyes but with festoons. Usually with short conical palps, whose second articles project laterally. Small size and slightly chitinized. Sexual dimorphism slight. The ♂ shows no ventral plates or shields. ||${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$||style="text-align:center;"|2. Genus
Hæmaphysalis. |- |Usually ornate, with eyes and festoons. Short, broad, or moderate palps, and basis capituli rectangular dorsally. Spiracles sub-oval or comma-shaped. ||${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$||style="text-align:center;"|3. Genus
Dermacentor. |- |Inornate, with eyes and festoons. Short palps, with basis capituli hexagonal dorsally with prominent lateral angles. The ♂ resembles Rhipicephalus dorsally, Dermacentor ventrally. Spiracles sub-triangular or comma-shaped. ||${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$ ||style="text-align:center;"|4. Genus
Rhipicentor. |- |Usually inornate, with eyes and festoons. Short palps, and basis capituli usually hexagonal dorsally. The ♂ possesses a pair of adanal shields and usually a pair of accessory adanal shields. Spiracles bluntly or elongate comma-shaped. ||${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$||style="text-align:center;"|5. Genus.
Rhipicephalus. |- |Inornate, with eyes, but indistinct festoons. Short palps, and capitulum intermediate between that of Rhipicephalus and Boophilus. Highly chitinized. The ♀ with very small scutum. The ♂ with a median plate prolonged into two spines projecting beyond and to either side of the anus. Anal groove obsolete. Spiracles rounded or short, oval in both sexes. ||${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$||style="text-align:center;"|6. Genus
Margaropua. |- |Inornate, with eyes, but indistinct festoons. Very short compressed palps ridged dorsally and laterally. Basis capituli hexagonal dorsally. Slightly chitinized. Unfed adults of small size. The ♀ with small scutum. The ♂ with adanal and accessory adanal shields. Spiracles rounded or oval in both sexes. No anal groove. ||${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$||style="text-align:center;"|7. Genus
Boophilus. |- |(b) Longirostrata. Rostrum long.
Ornamentation absent or present, at times confined to the legs; with eyes, with or without festoons. Long palps. Basis capituli subtriangular dorsally. The ♀ approaching Amblyomma. The ♂ with a pair of adanal shields, and with or without accessory adanal shields, and two posterior abdominal protrusions capped by chitinized points. Spiracles comma-shaped.||${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$ ||style="text-align:center;"|8. Genus
Hyalomma. |- |Generally ornate, with eyes and with festoons. Long palps, of which the second article is especially long. Basis capituli of variable form. The ♂ without adanal shields, but small ventral plaques are occasionally present close to the festoons. Spiracles subtriangular or comma shaped.
Sub-genus Aponomma. Devoid of eyes, or in which the eyes are poorly developed. Body frequently very broad. Occur almost exclusively on reptilia. ||${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$ ||style="text-align:center;"|9. Genus
Amblyomma. |- |rowspan=2|Rostrum concealed by overlapping cephalothorax.
Dorsal shield absent.
Sexual dimorphism slight. ||rowspan=2|${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$ ||style="text-align:center;" rowspan=2|Family Argasidæ ||rowspan=2|${\displaystyle \scriptstyle {\left\{{\begin{matrix}\ \\\\\ \ \end{matrix}}\right.}}$ ||colspan=4|Body usually flat with thin edges. Ventral grooves absent or very shallow. Eyes absent. ||  ||style="text-align:center;"|Genus Argas. |- |colspan=4|Body with thick edges. Ventral grooves present. Eyes sometimes present. ||${\displaystyle \scriptstyle {\left\{{\begin{matrix}\ \\\ \end{matrix}}\right.}}$ ||style="text-align:center;"|Genus Ornithodoros. |}