Hard Ticks: Genus Amblyomma


General Characteristics of the Genus: Most species have whitish markings, long palpi, a long hypostome, and festoons on the posterior margin of the abdomen.

# of Species: 90 species. Eight of which are found in the United States, Amblyomma being more common in the tropics.

Where Found: East of central Texas to the Atlantic Coast and northward to Iowa.

Lone Star Tick, Amblyomma americanum,
(Also called Speck Back Tick in the Ozark Mountains)

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Commonly Carry: Spotted Fever, Tularemia, and possibly Q Fever.

Markings:

  •  Females: Conspicuous silvery-white spot at the tip of the scutum
  •  Males: The pale markings are diffuse on the male specimens.

 

 

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Ticks change size as they feed. Adult Lonestar tick before feeding, and after varying lengths of feeding.

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Lonestar larvae (seed ticks), nymph, and adult (before and after feeding).

 

 

 

CommonHosts: livestock, dogs, deer, birds and man.

Where Found: Southern states east of Texas this species will bite man readily in the larval, nymphal and adult stages

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Gulf Coast Tick, Amblyomma maculatum,

Diseases Commonly Carried: Rickettsia parkeri Rickettsiosis

Markings:Slide022 - Version 2

  •  Spurs on the second, third and fourth pairs of legs
  •  More diffuse pale markings on the female than does the lone star tick.

Common Hosts: livestock, deer, dogs and man

When present in an area, the ticks often infest the ears of cattle. Screwworm flies are often attracted by the smell of fresh blood in these wounds, laying eggs in them. Later screwworm larvae may feed voraciously, cause festering sores that can kill cattle

Where Found: Along the Gulf and South Atlantic coastlines

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