Taxonomy
- Kingdom: Animalia
- Phylum: Arthropoda
- Subphylum: Chelicerata
- Class: Arachnida
- Order: Ixodida
- Family: Ixodidae
- Genus: Ixodes
- Species: I. kaiseri
Description
Ixodes kaiseri is an Old World ixodid (hard) tick species. Like other members of the genus, it possesses a scutum on the dorsal surface of the adult female and lacks one in males. Morphological characteristics distinguishing it from related species such as I. hexagonus include details of the basis capituli, festoons, and spiracular plates, which were first described by Arthur in 1957.
Distribution and habitat
The tick has been recorded across a broad region of southeastern Europe and the Near East, including Moldova, southern Ukraine, Crimea, Romania, Egypt, Israel, the northern Caucasus, Armenia, Azerbaijan, and Georgia. It inhabits forested environments as well as heavily overgrown riverbanks and steppe depressions where suitable host mammals are present.
Host range
I. kaiseri parasitizes a variety of mammalian hosts, primarily burrow‑dwelling or ground‑living species. Documented hosts include:
- Badgers (Meles meles)
- Red foxes (Vulpes vulpes)
- Steppe polecats (Mustela eversmanii)
- Raccoon dogs (Nyctereutes procyonoides)
- Common hedgehogs (Erinaceus europaeus)
The tick has also been collected from domestic dogs that frequent these habitats. All developmental stages (larva, nymph, adult) have been observed on hosts from March through October, with peak infestations occurring in March and April following host hibernation.
Life cycle and behavior
Developmental stages of I. kaiseri are found feeding on hosts throughout the active season. Males are infrequently encountered on hosts, suggesting that adult males typically remain unfed within burrows where mating occurs—a reproductive strategy shared with other burrow‑inhabiting ixodids. The species' phenology overlaps with that of Ixodes crenulatus, and multiple life stages may be present concurrently on the same host.
Etymology
The specific epithet “kaiseri” honors Dr. Makram N. Kaiser for his contributions to parasitology.
References
- Arthur, D.R. (1957). Two North African Ixodes Ticks: I. kaiseri sp. nov. from Egyptian Desert Fox Cubs. Journal of Parasitology, 43(5): 578–585.
- Filippova, N.A., & Uspenskaya, I.G. (1973). Ixodes kaiseri Arthur 1957 (Ixodidae) species taxonomic status. Parasitologiya, 7(4): 297‑306.
- Additional distribution and host records documented in subsequent molecular and morphological studies (e.g., Krumpálová et al., 2023).
