Class Arachnida, Suborder Mesostigmata

Chelicerae

first pair of appendage that helps in feeding

Order Mesostigmata

Stigmata- pair of respiratory spiracles

Peritreme-tracheal trunk extending anteriorly

from each stigma

Gnathosoma- forms a tube surrounding the

mouthparts

Tectum -present above the mouth

Tritosternum- ventral bristlelike organ, usually

is present immediately behind the gnathosoma

Palpal tarsus- has a forked tine at its base

dorsum of adults usually has one or two sclerites

called shields or dorsal plate

Varroa destructor (Varroa jacobsoni)

parasites of honey bees; ectoprasite; very large

Haemogamasus pontiger

- occurs in rodents, insectivores and beddings

scorpions, spiders, ticks and

mites

Class Arachnida Includes the

small

Class Arachnida mouth size

carnivorous

Class Arachnida is (Carnivorous, Omnivorous)

Hypostome

-used to penetrate/pierce

-there is a tooth

- release saliva that has: toxic substance

Hypostome

If Gnathosoma is more elongated it is***

Metapodosoma

last 2 pairs of legs

basis capituli

Gnathosoma is also called ___

-Prosoma

-Opisthoma

-Idiosoma

Class Arachnida Segments of Body

Prosoma

the 1st 6 segments of the body, bears

chelicerae, pedipalps and 4 pairs of walking legs

Gnathosoma

bears chelicerae and

pedipalps

Opisthosoma (abdomen)

the remaining segments

cuticle

mites & ticks breathe through their

Idiosoma

Represents the posterior single piece of mites and ticks

Ticks

Ticks or Mites.

Hypostome toothed, exposed

Mites

Ticks or Mites. Hypostome unarmed, hidden

Ticks

Ticks or Mites. Large, easily macroscopic

Mites

Ticks or Mites. Small usually microscopic

Mites

Ticks or Mites. Peritreme present in Mesostigmata

-Protonymph

-Deutonymph

-Tritonymph

Nymphal Instar of Supra Anactinotrichida

Stigmata

pair of respiratory spiracles

Gnathosoma

forms a tube surrounding the

mouthparts

Tectum

present above the mouth

Ventral plate

Aside from Dorsal Plate, Order Mesostigmata has a visible ____ which is in the ventral part & peripheral part of Anus

Dermanyssus gallinae

cosmopolitan species attacks fowl, pigeon, canary,

cage birds and also wild birds

2

Dermanyssus gallinae Sternal Plate #

1 (single)

Dermanyssus gallinae Dorsal plate #

man

Dermanyssus gallinae can also feed on ___ but cannot have dev't if here

red

Dermanyssus gallinae color engorged

does not reach end posterior end of body, truncated

Dermanyssus gallinae

Dorsal shield:?

Posterior margin:?

48-72 hours

Dermanyssus gallinae Eggs is hatched after

Borrelia anserina

Dermanyssus gallinae is a vector of this disease which causes spirochaetosis in fowls

house mouse mite

Allodermanyssus sanguineus is called

North America, Eurpose, Asia, Africa

Allodermanyssus sanguineus occurs in domestic rat, house mouse and spiny mouse (Acomys) in these countries

Rickettsia akari

Allodermanyssus sanguineus transmits this disease which is the cause of ricketssial pox of man

3

Allodermanyssus sanguineus Sternal (Ventral) plate Setae #

black or dark red

Family Macronyssidae when it is alive the guy often appears as this color

White/Northern Mite of Poultry

Ornithonyssus sylviarum is called

temperate

Ornithonyssus sylviarum is found in fowls & other birds in this climate

wide 2/3 of its length

and tapers to form tongue-like

continuation about half wide for

remainder of its length

Ornithonyssus sylviarum Dorsal plate description

Ornithonyssus sylviarum (Northern Fowl Mite)

Gut: appears X

Anterior/Middle part of the body

Ornithonyssus sylviarum's reproductive organ can be found in

Ornithonyssus bursa

This species cannot survive for longer than 10

days away from host bird

tapers to a blunt posterior end

Ornithonyssus bursa Dorsal plate description

anterior half of anal plate

Ornithonyssus bursa anus location

Ornithonyssus bursa Life Cycle

▪ Eggs hatch in 3 days

▪ Liberating 6-legged larvae w/c do not feed

▪ Moults to protonymph in 17 hours w/c feed on

host's blood

▪ Develop to deutonymph in 1 to 2 days that feed

on host's blood and become adult

True

T or F. The Larval stage of all mites DOES NOT feed on host

6 legged

# of legs of Larvae that hatch from Ornithonyssus bursa

Ornithonyssus bacoti (tropical rat mite)

Dorsal plate is narrower than that of

previous species and tapers gradually

to a blunt point w/ numerous setae

3 pairs

Ornithonyssus bacoti STERNAL PLATE bears how many pairs of setae

anterior half of anal plate

Ornithonyssus bacoti ANUS location

98

Ornithonyssus bacoti lays # of eggs in a lifetime

24 hours

Ornithonyssus bacoti moults into Protonymph in

Murine typhus (Ricketssia typhi) & Q fever (Coxiella burnetii)

Ornithonyssus bacoti transmits

60 days

lifetime of Ornithonyssus bacoti

0.6-1.33 mn

Ophionyssus natricis Adult size

yellow-brown

Color of Unengorged Ophionyssus natricis

2

# Dorsal Plates of Ophionyssus natricis

Genera Entonyssus and Entophionyssus

Other Genera of Snake Mites

rim of eyes

Ophionyssus natricis Larvae are non-feeders; nymphs and adults are

blood-feeders often on

- Pneumonyssoides caninum

- Pneumonyssus simicola

Spp under Family Halarachnidae, Gebus Pneumonyssus

in nasal passages and nasal sinuses of dogs

Pneumonyssoides caninum lives in

scanty

Pneumonyssoides caninum's smooth cuticle Shape

irregular

Pneumonyssoides caninum Dorsal plate shape

transverse slit bw 4th coxae

Pneumonyssoides genital opening

unknown

Mode of Transmission of Pneumonyssoides caninum

mucosal surface

Pneumonyssoides caninum can burrow in

Kennel cough

Pneumonyssoides caninum can be mistaken as

Non-Human Primates

Pnuemonyssus simicola is parasitic in bronchi [lower respiratory] of

Macaca mulatta (Rhesus monkey/macaque)

Pneumonyssus simicola is first isolated in

absent

Clinical signs of infection of Pseumonyssus simicola is usually

Tuberculosis

Pneumonyssus simicola may be mistaken as this disease because lessons may vary from few pale spots/yellowish foci to several

hundreds of tubercle-like lesions w/ associated

pneumonitis and cellular infiltration

snicking

instead of sneezing, birds do this instead

1-1.55mm

Varroa destructor size

Family Gamasidae/Raillietidae

Tegument is tough

Dorsal shield does not extend beyond

mouth parts

Stigmal openings occur b/w 3rd and 4th

coxae

Male genital pore is in front of sternal plate

3rd & 4th coxae

Family Gamasidae/Raillietidae STIGMAL OPENING occur between

Railletia auris, Railletia hopkinsi

Spp under Genus Railletia

Raillietia hopkinsi

occurs on the ears of antelopes

Echinolaelaps echidninus (spiny rat mites)

definitive host of haemogregarine protozoon, Hepatozoon of rat and

hamster and other parasitic on rodents

Eulaelaps stabularis

- parasite of small mammals and found in beddings, poultry houses, grain

stores and can cause annoyance to workers

- Vector of Pasteurella tularensis

Haemolaelaps casalis

occurs in birds and litters and may attack humans working in

association w/ such animals and places

Antennae,

mandible,

wings, and

compound

eyes,

thorax and

abdomen

Structures absent in Suborder Mesostigmata

tissue fluids of other animals

Class Arachnida feeds on ______ by sucking pharynx

Gnathosoma & Podosoma

Prosoma Divisions

Idiosoma

podosoma and opisthosoma joint

together

-Anterior Gnathosoma

-Idiosoma

2 Parts of Mites & Ticks

Mites

Ticks or Mites. Haller's organ ABSENT

indistinct/absent

Supraorder Anactinotrichida's Segmentation is

egg, larvae, nymphs, adults

Life Cycle of Supraorder Anactinotrichida

Order Mesostigmata

(-puncture in the middle) Parasitiform Mites

3rd & 4th basal coxa

Spiracles (stigmata) location

after feeding

When does the Tectum retract

shields or dorsal plate

dorsum of adults usually has one or two sclerites

called [Order Mesostigmata]

Caruncle

thread-like structure at the end of the tarsus

1 week

Dermanyssus gallinae Life Cycle can be completed within

4-8

Dermanyssus gallinae can lay how many eggs per laying period

Smaller

Dermanyssus gallinae Setae is (Smaller, Larger) than on skin around Dorsal plate