calliphoridae continued february 23, 2009. dichotomous key used to identify classification of...
TRANSCRIPT
Calliphoridae Continued
February 23, 2009
Dichotomous Key
Used to identify classification of organsims
Di=two
Usually has two couplets
Uses physical, unchanging characteristics
1. One pair of wings, halters present.....Diptera Two pairs of wings.............................................2
2. Hind legs enlarged for jumping.......Orthoptera Hind legs not as above.........................................3
3. With large unsegmented forceps-like cerci........................................................Dermaptera Cerci absent............................................................4
4. Piercing sucking mouthparts arising from anterior part of head, hemelytra usually present.......................Hemiptera Piercing sucking mouthparts arising from posterior part of head.......................................................................Homoptera
Adults
10-12 mm long
Usually metallic coloring
Bristles on meron
Plumose arista
2-3 notopleural bristles
Lucilia sp.
Lucilia sericata, Lucilia cuprina, Lucilia illustris
Bronze Bottle Flies
4.5-10 mm
Smaller than P. regina & Calliphora sp.
Lucilia sp.
Shiny green abdomen with coppery/bronzy reflections
Strong dorsal setae
Black thoracic spiracle
Lucilia sp.
Throughout US and Southern Canada
Warm weather fly--75-85 F
1st. genus in area to show up on corpse
Lucilia sp.
Life cycle: 9-21 days
4-8 generations per year
Temp. optimal mid 80’s
Fly up to 10 miles
Lucilia sp.
Females strongly attracted to flesh
Myiasis
Potential mechanical vector
Surgical maggots
Chrysomya rufifacies
Hairy Maggot Blow Fly
6-12 mm
Green, blue, copper, thoracic stripes
White bucca, white spiracle
Chrysomya rufifacies
Southern US
Warmer times of year--85+ F
Behavior close to Lucilia sp.
Facultatively predacious in 2nd/3rd instar
Usually 2nd to colonize
1-2 days after pioneer species
Chrysomya rufifacies
Little known--researched
9-12 days, 4-8 generations
Long flight (probably)
Larvae disperse like other green bottle flies, but not as far
Primary and secondary myiasis possible
Chrysomya megacephala
Oriental Latrine Fly/Big-Headed Blow Fly
6-12 mm
Large red eyes
Stumpy, box-like body
Buca yellowish-orange
Bristles on stem vein
Anterior spiracle blackish brown
Chrysomya megacephala
Widely distributed over Orient and Australian regions
South Africa, African Islands, Pacific Islands, Brazil
Southern US
Warm weather fly
Nusiance
Adults not easily distrubed
Chrysomya megacephala
Life cycle: 7-25 days
Larval dispersion orderly
10-20 feet, in soil
Nuisance in human dwellings
Potential to mechanically vector diarrhea bacteria
Accidental myiasis
Cochliomyia macellaria
Secondary screw worm
5-12 mm
Bright yellow gena, shiny blue-green thorax/abdomen
3 dark logitudinal stripes on thorax
White thoracic spiracle
Cochliomyia macellaria
Throughout US/parts of Canada
Warmer months
Sunny and shaded locations
rarely recovered from bodies indoors
Max flight range of 15 miles
Cochliomyia macellaria
9-39 days
10-14 generations per year
Adults live 2-6 weeks
Doesn’t infest living tissue
Mechanical vector for dysentery
Closely related to Cochliomyia hominivorax
Cochliomyia hominivorax
Sarcophagidae
Flesh flies
>2000 species
Larvae of most species breed in meat
Difficult to ID species--usually genitalia
Large--4-16 mm
Grey and black, stripes and checkerboard
Sarcophagidae
Global distribution
Sarcophaga haemorrhoidalis
Mostly attracted to carrion
Fly in rain, may be first to reach corpse
Otherwise arrive after blowflies
Feces
Sarcophagidae
Females deposit live 1st instar larvae
viviparous or larviviparous
Approx. 30-40 per female
At the moment, not commonly used in investigations
Any Questions?