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ENTO 431 exam 2 questions and answers
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ENTO 431 exam 2 questions and answers
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ENTO 431 exam 2 questions andanswers
Key characteristics of coleoptera - Answer-- Elytra fully scaleritized. Leathery forewings.
- Holometabolous or complete metamorphosis that is temperature regulated.
- Chewing mouthparts
Family Dermestidae: - Answer-- Skin or hide beetles (common name)
- Scavengers
- Stored product and medical importance
- Late stage decomposition
- 1-12mm long (bullet form)
- Frass (feces) is an important indicator
- Development can take months
- Multiple instars (larval development stage) (this is a problem because each species
has a different number of instars, they're very inconsistent)
- 500-700 species
Family Silphidae: - Answer-- CARRION beetles or burying beetle
- Small family
- 7-45mm in length
- Black with red on them
- Antennae have 11 segments that get bigger towards the end. Clubbed antennae
- 1 or 2 abdominal segments are exposed.
- Scavengers or predators
- Development about a month long.
- Parental care **
Family Staphylinidae - Answer-- ROVE beetles
- Short elytra compared to the rest of the body. Long abdomen is exposed.
- Predators and scavengers
- Common in forensics (can use them to determine if remains have been moved from
one place to another)
Family Cleridae - Answer-- CHECKERED beetles. Red legged hand beetle.
- covered in lots of hairs as adults.
- Brightly colored.
- 5 tarsal segments on each leg. "5-5-5 tarsal formula"
- Good to use to know if a body has been moved
Family Tenebrionidae - Answer-- 11 segmented antennae
- First sternite not divided
- DARKING beetles
- 5-5-4 tarsal formula
, - Stored product pest and in forensics
Family Carabidae - Answer-- Head < thorax < abdomen in size
- Ground beetles
- Predators
Family Trogidae - Answer-- HIDE beetles
- Warty appearance on elytra, oval shape, soil encrusted
- Late in the decomposition process eat hair, cartilage, skin.
Family Nititdulidae - Answer-- 11 segmented club antennae
- 5-5-5 tarsal formula
- Pits on elytra (punctured appearance)
- Spread product pest
- Important in forensics
Family Scarabaeidae - Answer-- Antennae look like they have plates (lammellae)
- Front legs are broad for digging
- Stout body.
- We do not know the development time period
Forensic entomology dates back to the _____th century - Answer-13th
Megnin and Bergeret studies what in 19th century france? Who backed up their studies
by publishing similar findings? - Answer-What bugs are attracted to a decomposing
body over time. Murray Motter backed that up in 19th century USA
In the 1950s, the university of tennessee discovered that... - Answer-narcotics affect
how a body decomposes and different bigs are found during the winter.
In the 1960s, the university of Clemson studied and published... - Answer-The 6 stages
of terrestrial and aquatic decomposition as they realte to the presence of absence of
bugs.
The 6 stages of terrestrial decomposition - Answer-1. Fresh; No insects present
2. Bloated; Microbes travel all around the body. Flies begin to lay eggs on any availiable
orface.
3. Active Decay; maggot activity on the body
4. Advanced Decay; maggots leave the body and disperse into the environment
5. Dry; Maggots gone, beetles feed on tissue remaining
6. Remains; just skeleton. no bugs.
The 6 stages of aquatic decomposition - Answer-1. Submerged Fresh; No insects
present
2. Early Floating; Produce gas and float to the top. Colonized by bugs.
3. Floating Decay; maggot activity on the body. Maggots begin to sink again.
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