Page:Tropical Diseases.djvu/288

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 * +GENERIC CLASSIFICATION OF TICKS
 * rowspan=9|Rostrum terminal. Dorsal shield present. Sexual dimorphism marked ||rowspan=9| || rowspan=9| ||rowspan=9| ||Anal groove surrounding anus in front. || | || ||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. || |||1. Genus
 * rowspan=8|Anal groove containing anus behind. || rowspan=8| ||rowspan=8| ||(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. |||||2. Genus
 * Usually ornate, with eyes and festoons. Short, broad, or moderate palps, and basis capituli rectangular dorsally. Spiracles sub-oval or comma-shaped. |||||3. Genus
 * 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. || |||4. Genus
 * 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. |||||5. Genus.
 * 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. |||||6. Genus
 * 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. |||||7. Genus
 * (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.|| |||8. Genus
 * 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. || |||9. Genus
 * rowspan=2|Rostrum concealed by overlapping cephalothorax. Dorsal shield absent. Sexual dimorphism slight. ||rowspan=2| || rowspan=2| ||rowspan=2| ||colspan=4|Body usually flat with thin edges. Ventral grooves absent or very shallow. Eyes absent. || |||Genus
 * colspan=4|Body with thick edges. Ventral grooves present. Eyes sometimes present. || |||Genus
 * }
 * 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. |||||7. Genus
 * (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.|| |||8. Genus
 * 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. || |||9. Genus
 * rowspan=2|Rostrum concealed by overlapping cephalothorax. Dorsal shield absent. Sexual dimorphism slight. ||rowspan=2| || rowspan=2| ||rowspan=2| ||colspan=4|Body usually flat with thin edges. Ventral grooves absent or very shallow. Eyes absent. || |||Genus
 * colspan=4|Body with thick edges. Ventral grooves present. Eyes sometimes present. || |||Genus
 * }
 * rowspan=2|Rostrum concealed by overlapping cephalothorax. Dorsal shield absent. Sexual dimorphism slight. ||rowspan=2| || rowspan=2| ||rowspan=2| ||colspan=4|Body usually flat with thin edges. Ventral grooves absent or very shallow. Eyes absent. || |||Genus
 * colspan=4|Body with thick edges. Ventral grooves present. Eyes sometimes present. || |||Genus
 * }
 * colspan=4|Body with thick edges. Ventral grooves present. Eyes sometimes present. || |||Genus
 * }