There are a number of species of Ixodes found in the UK and Europe that are considered to be host specific.  Their role as vector for disease, in some cases are not well understood due to their host specificity, however in some cases these ticks may accidentally be found on domestic animals such as cats due to close proximity rather than host choice.  Most of the species described in this section are mainly found on birds or small mammals such as voles.

 

As with other species of Ixodes covered in this website, males and females are separately identified, please scroll down to the male key

 

Key to Females

1a.)  Legs long and slender

female key 1a

Ixodes vespertilionis

1b.)  Legs of moderate length and thickness

female key 1b

2

2a.)  Porose area undivided

female key 2a

Ixodes unicavatus

2b.)  Two porose areas

female key 2b

3

3a.)  Basal segment of article i of the palps have a lateral spur

female key 3a

Ixodes trianguliceps

3b.)  Lateral spur absent

female key 3b

4

4a.)  Palps relatively long; article ii + iii as long or longer than the width of the basis capituli

female key 4a

5

4b.)  Palps relatively short; article ii+ iii may be fused or shorter that the width of the basis capituli

female key 4b

6

5a.)  Coxa I internal spur is long, external spur is small, auriculae is prominent and triangular in shape

female key 5a

Ixodes acuminatus

5b.)  Coxa I internal/external spurs small; auriculae large

Ixodes apronophorus

5c.)  Coxa I have small internal/external spur, external spur indistinct; auriculae is button-shaped

Ixodes frontalis

6a.)  Article iii wider than article ii creating a club-shape of the palps

female key 6a

7

6b.)  Article ii + iii similar width

female key 6b

8

7a.)  Coxa I has large, distinct external spur; auriculae are rounded and the palps are blade-shaped

female key 7a

Ixodes rothschildi

7b.)  Coxa I has large, distinct external spur; auriculae appear folded and the palps are club-shaped

female key 7b

Ixodes caledonicus

7c.)  Coxa I external spur absent; auriculae absent; palps are club-like

female key 7c

Ixodes uriae

8.)  Coxa I internal spur absent

female key 8

9

9a.)  Tarsus I stepped

female key 9a

Ixodes arboricola

9b.)  Tarsus I not stepped

female key 9b

Ixodes lividus

 

 

 

Key to Males

1a.)  Legs long and slender

male key 1a

Ixodes vespertilionis

1b.)  Legs of moderate length and thickness

male key 1b

2

2a.)  Brushes of setae present on festoons

male key 2a

3

2b.)  Brushes of setae on festoons absent

4

3a.)  Coxa I has an external spur

Ixodes unicavatus

3b.)  Coxa I lacks external spur

male key 3b

Ixodes uriae

4a.)  Coxa I lacks distinct spurs

male key 4a

8

4b.)  Coxa I has 1-2 distinct spurs

5

5a.)  Article ii + iii fused

Ixodes caledonicus

5b.)  Article ii + iii shows  true division

6

6a.)  Coxa I with external spur only

Ixodes frontalis

6b.)  Coxa I with internal and external spurs

7

7a.)  Pairing of internal and external spur unequal

Ixodes acuminatus

7b.)  Pairing of internal and external spur equal

Ixodes apronophorus

8a.)  Posterior margin of basis viewed dorsally is narrow

male key 8a

9

8b.)  Posterior margin of basis viewed dorsally wide

male key 8b

10

9a.)  Body is large and round, with a wide margin surrounding the conscutum; palps are club-like

male key 9a

Ixodes rothschildi

9b.)  Body is small, lacking margin around conscutum; palps small and uniform with a division visible

male key 9b

Ixodes trianguliceps

10a.)  Palps small; dorsal basis narrows posteriorly; spurs absent on coxa I

male key 10a

Ixodes arboricola

10b.)  Palps small; dorsal basis is rectangular in shape; spurs absent on coxa I

male key 10b

Ixodes lividus

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