Midtterm II Flashcards
Goniodes dissimilis – a typical example of ischnoceran lice of birds. Members of this group are equally frequent on birds and mammals. Antennae are short but thin and never can be hidden into the head. An egg is in the abdomen
Chewing lice
Menopon gallinae - an example of amblyceran lice. Species of this group of lice are more frequent on birds than on mammals. Antennae are stout, short and can be retracted into cavities on both sides of head.
Chewing lice
Columbicola columbae an ischnoceran louse of pigeons.
Chewing lice
Felicola subrostratus: the only louse species of cat in Europe
Chewing lice
A nit of Felicola with lid is attached to hair. It contains egg yolk or embryo.
Chewing lice
A nit of Trichodectes without lid sits on hair with the first nymph inside before hatching.
Chewing lice
Adult Trichodectes canis grasps the hair with its mandibles. A claw on hind legs is seen. Only one claw on each leg is characteristic for each mammalian louse. (Avian lice have two.)
Chewing lice
Bovicola ovis nymph. Its first two legs embrace the hind part of the head. Only one claw on the tip of some legs can be seen. Particles of ingested hair are in the body as dark masses.
Chewing lice
An adult specimen of Werneckiella equi.
Chewing lice
A small nymph of Werneckiella equi.
Chewing lice
Haematopinus suis with equal sized legs and claws. Members of this genus are the biggest lice that live on livestock.
Blood sucking lice
Linognathus vituli First legs are smaller than the next ones, the head is elongated. On cattle.
Blood sucking lice
Solenopotes capillatus louse of cattle [For comparison only: NO DEMONSTRATION SPECIMEN] Similar to Linognathus but has a stouter head.
Blood sucking lice
S. capillatus has a wide head but it is slimmer than the distance between of the stems of first legs. [For comparison only! NOT SHOWN SPECIMEN!]
Blood sucking lice
Linognathus setosus louse of dog.
Blood sucking lice
A squashed nymph of Haematopinus from a nit.
Blood sucking lice
Male Pulex irritans. Male flea is smaller than the female. Chitinous copulatory organs as bent rods lay inside the abdominal part.
Fleas
Female Pulex irritans. A developing egg can be seen inside the abdomen as spherical mass. Dark masses are remnants of ingested blood.
Fleas
Ctenocephalides canis ♀
Fleas
Ctenocephalides canis ♂.
Fleas
Ctenocephalides canis.
Fleas
Ctenocephalides felis
Fleas
Tibia of the third leg of Ctenocephalides canis.
Fleas
Tibia of the third leg of Ctenocephalides felis.
Fleas
Female C. felis. General shape of it does not differ too much from the shape of C. canis.
Fleas
Second and third stages of flea larvae. Their intestine is filled with dark digested blood.
Fleas
Nymph of Cimex lectularius. Mass of blood meal is in the body. Antennae are 4 segmented.
Bedbugs
Long, skin-piercing feeding organ erects backwards from the tip of the head of Cimex.
Bedbugs
A non-parasitic female of Psychoda species. Parallel veins of wings run without crossveins.
Sand flies
A parasite Phlebotomus with long mouthparts and weak wings. Legs were artificially removed
Sand flies
A flattened female ceratopogonid biting midge with pale dark patches on its wings. Stem of broken antenna bears very short hairs.
Biting midges
A flattened male ceratopogonid biting midge with very pale dark patches on his wings. His antennae bear long hair. Eyes are extremely large.
Biting midges
Head of a female mosquito. Her antennae bear few and short bristles. The rod-like palps are very short organs near the base of proboscis.
Mosquitoes
Head of a male mosquito. His antennae bear long and dense hairs. The hairy palps are longer than the length of proboscis.
Mosquitoes
A thick breathing siphon runs inside the tip of tail of mosquito larva. Between of two tufts of anal hairs four plates of anal gills are seen
Mosquitoes
Large mouth brushes in front of the mouth on the head of mosquito larva. Rod-like antennae stretch near the darker eyes.
Mosquitoes
General characters of flies – compared with specialised flies
Every fly (brachyceran Diptera) has two short, club-shaped antennae which have 3 segments each. Bristles on them can be longer than the length of the antenna. Mouthparts sometimes are longer than the antennae.
Head of a fruit fly with two swollen antennae. Colorless bristled organs are the compound eyes.
Mouthparts of Melophagus are longer than the almost invisible antennae. Eyes are big.
Cephalopharyngeal skeleton of a muscoid fly larva with a grabbing hook. The skeleton supports the inner organs of the head but don’t act as a chewing organ. The crown like object above is a spiracle.
Muscoid flies
Posterior spiracles of a fly larva. The dark circle around the plate is the peritreme and the wavy strips are air slits. Number of slits is equal to the developmental stage of larva.
Muscoid flies
Two tubes of spiracles on the rear end of the 2nd instar larva of Hypoderma. They have a few circular air holes. Cuticular spines are very small.
Botflies and warble fli
Frontal view of the large spiracles on the rear end of the 3rd instar larva of Hypoderma. Air slits were united in a porous circular band.
Botflies and warble fli
Gasterophilus egg with lid and a larva inside.
Botflies and warble fli
Empty shell of Gasterophilus egg on a hair
Botflies and warble fli
The strong cephalopharyngeal skeleton of Gasterophilus larva is equipped with large hooks in order to grasp firmly to the mucosa of stomach. Bands of spines belt the cuticular exoskeleton.
Botflies and warble fli
Frontal view of the coalesced spiracles on the rear end of the 2nd instar larva of Gasterophilus. Two long air slits run in parallel on each side of the united plate. The ring of peritreme is thick.
Botflies and warble fli
Rows of strong spines cover the whole body of 2 nd and 3rd instar larvae of Gasterophilus - while the maggots of other botflies and warble flies are hardly spiny. Large spines prevent the detachment from the wall of stomach.
Botflies and warble fli
Frontal view of the coalesced spiracles on the rear end of the 3rd instar larva of Gasterophilus. Three long air slits run in parallel on each side of the united plate. The semicircular rings of the peritreme are thick.
Botflies and warble fli
Long hooks of Oestrus larvae resemble hooks of Gasterophilus larvae. Their function is the same as in case of botfly of horse. [For comparison only: NO DEMONSTRATION SPECIMEN
Botflies and warble fli
Frontal view of one of the spiracles on the rear end of the 3rd instar larva of Oestrus ovis. Whole surface of it is perforated by many holes. [For comparison: NO DEMONSTRATION SPECIMEN!]
Botflies and warble fli
Carnivorous mites have two long chelicerae that erect between of short pedipalps on the gnathosoma. An egg lays inside the idiosoma of this female.
General features of mites and ticks (Acari)
Scissor-like chelicerae are similar to the pincers of crabs. Between them a sharp hypostome is seen. Jointed pedipalps extend beyond the mouthparts.
General features of mites and ticks (Acari)
Female Sarcoptes mite with short legs. Long stalked ambulacrums (“walking sticks”) are seen on the tips of first two legs.
Mange mites
The long ambulacral stalks of Sarcoptes are non segmented. Between the stout and segmented pedipalps small chelicerae are seen.
Mange mites
After dissolving the skin sample with lye only the destroyed parts of mites remain in the liquid.
Mange mites
Surface of Notoedres mite is patterned with concentric circles.
Mange mites
Ventral side of Notoedres mite is similar to the shape of Sarcoptes. Both genera have non segmented ambulacral stalks on frontal pairs of legs. They’re rare mites of cat and rabbit
Mange mites
Females of Knemidokoptes mites of birds have extremely short legs and mouthparts, too. Hind legs are barely visible. They live in the dept of the keratinous layer of skin.
Mange mites
Ventral side of Psoroptes female. This mite does not burrow into skin but walks on it therefore it has long legs. Thread-like ambulacral stalks are long and segmented on the tip of first four legs.
Mange mites
Ventral side of Psoroptes male. Males are less common than females. Their ambulacrum is similar to the female’s one. They have two circular suckers close to the anal pore on the rear end.
Mange mites
Psoroptes mites paired. Males often mate with female nymphs but the fertilisation of eggs takes place only after the last moult of the nymph when she reaches the adult stage.
Mange mites
Larva of Psoroptes has only six legs. (The fourth pair of legs is missing on them.) They are much smaller than the members of subsequent stages
Mange mites
Chorioptes bovis female. The species is similar to the Psoroptes mites but its funnel-shaped ambulacrums are short because they short stalked.
Mange mites
Chorioptes bovis male. Last pair of legs in males of non-burrowing mites is always longer than the same legs of females.
Mange mites
Frontal pairs of legs of Chorioptes mite. Funnel-shaped suckers of ambulacrums on the tarsal tips of front legs can be seen well.
Mange mites
Otodectes cynotis male. Funnel-shaped suckers of ambulacrums on tips of frontal pairs of legs are precisely in case of Chorioptes.
Mange mites
Otodectes cynotis female. Her ambulacrums are similar to the males’ ones. Hind legs are so small that sometimes avoid recognition. This species is almost indistinguishable from species of Chorioptes genus by morphology but its habitat and host precisely indicate their real identity. They much more often can be found on cats than on dogs.
Mange mites
A male feather mite from a zoo bird. Body of every species is elongated in order to avoid the effect of preening. Harmless mites in quill and shaft of feathers or among the barbs are very common in wild birds. They feed on keratin. Sometimes the barbs brake in consequence of chewing and the vane of feather becomes porous.
Mange mites
Suckers of Sarcoptes species are on a long unsegmented stalk. They are on the 1st, 2nd, and 4 th legs of males or 1st and 2nd legs of females.
Ambulacrums of mange mites
Suckers of Notoedres species are on a rather long unsegmented stalk. They are found on the same legs as in the case of Sarcoptes.
Ambulacrums of mange mites
Knemidokoptes females have no ambulacrums. All legs of males have similar ambulacrums as Sarcoptes species have, but males are rare.
Ambulacrums of mange mites
Suckers of Psoroptes species are on a long segmented stalk. They are on the 1st, 2nd, and 3rd legs of males or on 1 st , 2 nd and 4th legs of females.
Ambulacrums of mange mites
Suckers of Chorioptes species are on a short stalk. They are on all of the legs of males and on the 1st , 2nd and 4th legs of females
Ambulacrums of mange mites
Suckers of Otodectes species are on a short stalk. They are on all of the legs of males but only on the 1st , 2nd legs of females.
Ambulacrums of mange mites
Small specimen of Demodex canis near the brown hair. Four small legs are on its left side.
Hair follicle mites
A fully developed living specimen of Demodex mite in a very fresh sample. Opisthosoma is long.
Hair follicle mites
Mostly only the contour of the empty cuticle of dead Demodex is visible in the fat collected from the skin.
Hair follicle mites
If the mite gets into the sample alive we can see all of the legs and the distinct gnathostome.
Hair follicle mites
Longitudinal sections of more Demodex mites in a hair follicle.
Hair follicle mites
Mass of Demodex mites in a nodule within the subcutaneous tissue of a cattle.
Hair follicle mites
Cheyletiella mites are smaller as the size of mange mites in general. This larva (and adults too) has a hooked claw on both of its pedipalps.
Cheyletiella mites
Comb-like end of the ambulacrum on the legs is a very characteristic feature of this genus.
Cheyletiella mites
Unmistakable feature of these mites are the claws.
Cheyletiella mites
Empty shell of a Cheyletiella egg attached to hair.
Cheyletiella mites
A long legged adult harvest mite is never seen on animals because it preys on other arthropods
Harvest mites or chiggers
Red pigment of chigger larva partly leaked out of the body during the process of preservation.
Harvest mites or chiggers