Carios

Latreille, 1796

Species Guides

Carios kelleyi

Carios is a of soft ticks in the Argasidae, comprising eight recognized . Members of this genus are primarily associated with bats, with a distribution spanning the Palearctic, Nearctic, and other regions. The genus is distinguished by morphological and ecological adaptations for life in bat roosts. Several species have documented medical significance due to aggressive biting and potential transmission.

Carios by (c) Jody, some rights reserved (CC BY), uploaded by Jody. Used under a CC-BY license.

Carios by (c) Benjamin Burgunder, some rights reserved (CC BY), uploaded by Benjamin Burgunder. Used under a CC-BY license.

Carios by (c) k_wells, some rights reserved (CC BY), uploaded by k_wells. Used under a CC-BY license.

Pronunciation

How to pronounce Carios: /ˈkæɹi.oʊs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Carios are soft ticks ( Argasidae) lacking the hard characteristic of ixodid ticks. The is distinguished from other genera by morphological features including mouthpart structure and body shape, though specific diagnostic characters require examination by acarologists. Species-level identification relies on subtle morphological differences in , tarsal structures, and body proportions. Carios vespertilionis, the type species, serves as a reference for comparisons with .

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Habitat

in this inhabit bat roosts in attics, burrows, hollow trees, and caves. Transient bat colonies, including maternal colonies, provide suitable . Some species occupy lowland and low mountain regions, with documented occurrences up to moderate elevations.

Distribution

distribution with confirmed records across the Palearctic (including Germany, Poland, and extending to South Africa), Nearctic (Canada, Montana), and potentially China. The occurs in central Germany across six federal states (Lower Saxony, Brandenburg, Saxony, North Rhine-Westphalia, Hesse, Rhineland-Palatinate), with new records in eastern Saxony connecting to Polish .

Seasonality

Winter activity documented for Carios vespertilionis, with collections made December through February. This pattern reflects the association with hibernating bats and the sheltered nature of roost .

Diet

Blood-feeding of bats. Larvae feed for extended periods (few days to 31 days), while nymphs and feed rapidly (less than one hour).

Host Associations

Eptesicus nilssonii - northern bat
Eptesicus serotinus - serotine bat
Myotis daubentonii - Daubenton's bat
Myotis myotis - greater mouse-eared bat
Nyctalus leisleri - Leisler's bat
Pipistrellus nathusii - Nathusius's pipistrelle
Pipistrellus pygmaeus - soprano pipistrelle
Pipistrellus pipistrellus - common pipistrelle
Vespertilio murinus - parti-coloured bat
Myotis lucifugus - little brown bat; C. kelleyi
Myotis volans - long-legged bat; C. kelleyi
Myotis californicus - California myotis; C. kelleyi
Myotis evotis - long-eared myotis; C. kelleyi
Myotis ciliolabrum - western small-footed myotis; C. kelleyi
Lasionycteris noctivagans - silver-haired bat; C. kelleyi
Eptesicus fuscus - big brown bat; C. kelleyi
Pipistrellus hesperus - western pipistrelle; C. kelleyi

Life Cycle

Development includes larval, nymphal, and stages. Larvae remain attached to for prolonged feeding periods (days to weeks), while nymphs and adults feed rapidly off-host. This dichotomy in feeding duration represents a distinctive trait within the .

Behavior

Carios vespertilionis has been observed attacking humans and is characterized as highly aggressive. Bites cause severe skin reactions including fever, ulceration, erythema, and edema. rates on individual bats are typically low (1–5 larvae), though exceptional cases of 72–97 larvae on single have been documented. High infestations may induce physiological stress and inflammatory responses in bats.

Ecological Role

Potential for multiple including virus, Issyk-Kul virus, Coxiella burnetii, Ehrlichia, , Borrelia , and spp. A Swedish study detected Borrelia in 24% of specimens. The may serve as a bridge for pathogen transmission between bat and, in some cases, to humans.

Human Relevance

Medical significance due to aggressive biting and severe cutaneous reactions. Potential public health concern as a for zoonotic . Carios kelleyi has been documented in New Jersey with implications for public health surveillance.

Similar Taxa

ArgasBoth are of soft ticks in Argasidae; Carios is distinguished by association with bats and morphological characters including structure
OrnithodorosBoth belong to Ornithodorinae; Carios is separated by morphological features and primarily chiropteran associations

More Details

Species diversity

The currently contains eight recognized : C. australiensis, C. daviesi, C. dewae, C. macrodermae, C. pusillus, C. quadridentatus, C. sinensis, and C. vespertilionis (type species).

Taxonomic history

Carios is one of nine in the Ornithodorinae. The genus was established by Latreille in 1796 with C. vespertilionis as the type .