Aracnida Flashcards
Arachnida
Mites and ticks
General characteristics
Simple eyes, if present No wings Presence of patella Claws, suckers or setae Larva 3 pair of legs Adults+nymphs 4 pair or legs Palms, hypostome, chelicerae
Order Astigmata
Mange mites genus: Sarcoptes Psoroptes Otodectes Notodres Knemidocoptes Chorioptes
Order Prostigmata
Mites Genus: Demodex Cheyletiella Neotrombicula
Order Mesostigmata
Mites
Genus:
Dermanyssus
Varroa
Order Metastigmata
Ticks
Family Ixodidae
Family Argasidae
Genus Sarcoptes
Sarcoptes scabei Host-adapted strains Small Smooth+striated cuticle, spines+setae Chelicerae+maxipalps Short limbs with suckers (sexual dimorphism), pedicles Burrows in epidermis Nymphs and fert.females infective (direct or fomite)
Genus Psoroptes
Non burrowing mite Wool/fur+ ears Longer legs w suckers on 3-jointed pretarsi Males have copulatory suckers Pointed capituli
Genus Otodectes
Non burrowing mites
Ears
Suckers without jointed pretarsi
Genus Knemidocoptes
Knemidocoptes-Birds, beak feathers and legs in parrots
Dermatophagoides-dust mite
Similar to Sarcoptes
Genus Demodex
Long bodies- podosoma, striated opistosoma
In hair follicles and sebaceous glands
Very host-specific
Transmits Streptococcus pyogenes (acne)
Genus Cheyletiella
“Walking dandruff” mites
Palpi claws
Genus Neotrombicula
Only larva parasitic
Mainly summer+autumn
Round patches btw eyes (in dogs)
Genus Dermanyssus
Chelicerae, elongated maxipalps Erlanger developed legs Idiosoma w shields Heamatophagous Birds, domestic rodents Nocturnal Allergic reactions Zoonotic
Genus Varroa
Bees
Large in relation to host
Vectors of DWV
Family Ixodidae
Respiratory stigma/spiracle after coax in last leg Dorsally visible capituli Hypostome w retrograde teeth Differentiated by scutum and capituli length/shape Permanent parasites Egg-larva-nymph-adult 3 types of life-cycle Vectors/spreaders of many diseases
Genus Ixodes
Transmits Tularemia, Lyme disease, Erlichia
3 hosts life-cycle
Genus Dermacentor
Ornamented
Transmits Babesia canis, Q-fever, Rocky Mountain spotted fever, Tlaremia
Generally 3 host life-cycle
Genus Rhipicephalus
Transmission of Babesia canis, Hepatozoon canis, Erlichia canis, filaria in dogs, Mediterranean spotted fever, Tularemia
3 hosts life-cycle
“Darth Wader”
Family Argasidae
Soft ticks Ventrally located capituli (camerostome) No sclerotized scutum Hypostome w less teeth Several egg laying Temporary parasites Nocturnal Egg-larva-2 to 6 nymphal-adults Differentiation through dorsal discs, capituli mood and hypostome
Genus Argas
Birds and bats
Inoculation of toxins
Genus Ornithodoros
Parasites in mammals+bats
Vector of African swine fever
Pointed capitulum
