Ixodidae
| Ixodidae Temporal range:
| |
|---|---|
| |
| Ixodes ricinus (engorged) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Chelicerata |
| Class: | Arachnida |
| Order: | Ixodida |
| Superfamily: | Ixodoidea |
| Family: | Ixodidae C. L. Koch, 1844 |
The Ixodidae are the family of hard ticks or scale ticks,[1] one of the three families of ticks, consisting of over 700 species. They are known as 'hard ticks' because they have a scutum or hard shield, which the other major family of ticks, the 'soft ticks' (Argasidae), lack. They are ectoparasites of a wide range of host species, and some are vectors of pathogens that can cause human disease.[citation needed]
Description
[edit]They are distinguished from the Argasidae by the presence of a scutum.[2] In both the nymph and the adult, a prominent gnathosoma (or capitulum, mouth and feeding parts) projects forward from the animal's body; in the Argasidae, conversely, the gnathosoma is concealed beneath the body.[citation needed]
They differ, too, in their lifecycle; Ixodidae that attach to a host bite painlessly and are generally unnoticed, and they remain in place until they engorge and are ready to change their skin; this process may take days or weeks. Some species drop off the host to moult in a safe place, whereas others remain on the same host and only drop off once they are ready to lay their eggs.[citation needed]
Classification
[edit]
There are 702 species in 14 genera.[3] The family contains these genera:[3]
- Africaniella – 2 species
- Amblyomma – 130 species (includes some of Aponomma)
- Anomalohimalaya – 3 species
- Archaeocroton – 1 species
- Bothriocroton – 7 species
- Cosmiomma – 1 species
- Cornupalpatum – 1 species
- Compluriscutula – 1 species
- Dermacentor – 34 species (includes Anocentor)
- Haemaphysalis – 166 species
- Hyalomma – 27 species
- Ixodes – 246 species
- Margaropus – 3 species
- Nosomma – 2 species
- Rhipicentor – 2 species
- Rhipicephalus – 82 species (includes Boophilus)
- Robertsicus – 1 species
Fossil genera
[edit]- †Compluriscutula Poinar and Buckley 2008 Burmese amber, Myanmar, Cenomanian
- †Cornupalpatum Poinar and Brown 2003 Burmese amber, Myanmar, Cenomanian
Medical importance
[edit]Many hard ticks are of considerable medical importance, acting as vectors of diseases caused by bacteria, protozoa, and viruses, such as Rickettsia and Borrelia.[2] Other tick-borne diseases include Lyme disease, babesiosis, ehrlichiosis, Rocky Mountain spotted fever, anaplasmosis, Southern tick-associated rash illness, tick-borne relapsing fever, tularemia, Colorado tick fever, Powassan encephalitis, and Q fever.[4]
See also
[edit]
References
[edit]- ^ "Ixodidae". NCBI taxonomy. Bethesda, MD: National Center for Biotechnology Information. Archived from the original on 14 May 2018. Retrieved 28 September 2017.
Lineage( full ) cellular organisms; Eukaryota; Opisthokonta; Metazoa; Eumetazoa; Bilateria; Protostomia; Ecdysozoa; Panarthropoda; Arthropoda; Chelicerata; Arachnida; Acari; Parasitiformes; Ixodida; Ixodoidea
- ^ a b D. H. Molyneux (1993). "Vectors". In Francis E. G. Cox (ed.). Modern parasitology: a textbook of parasitology (2nd ed.). Wiley-Blackwell. pp. 53–74. ISBN 978-0-632-02585-5. Archived from the original on 2017-02-15. Retrieved 2016-11-06.
- ^ a b Alberto A. Guglielmone; Richard G. Robbing; Dmitry A. Apanaskevich; Trevor N. Petney; Agustín Estrada-Peña; Ivan G. Horak; Renfu Shao; Stephen C. Barker (2010). "The Argasidae, Ixodidae and Nuttalliellidae (Acari: Ixodida) of the world: a list of valid species names" (PDF). Zootaxa. 2528: 1–28. doi:10.11646/zootaxa.2528.1.1. hdl:11336/97869. Archived (PDF) from the original on 2019-07-24. Retrieved 2015-06-28.
- ^ "CDC - Tick-Borne Diseases - NIOSH Workplace Safety and Health Topic". www.cdc.gov. 2018-11-14. Archived from the original on 2019-07-01. Retrieved 2019-07-01.
