Beetles of Forensic Importance pt. 2
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Transcript of Beetles of Forensic Importance pt. 2
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Beetles of Forensic Beetles of Forensic Importance pt. 2Importance pt. 2
Beetles of Forensic Beetles of Forensic Importance pt. 2Importance pt. 2
March 11, March 11, 20092009
March 11, March 11, 20092009
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scutellum
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SilphidaeSilphidaeSilphidaeSilphidaeCarrion beetles or burying beetles
Large beetles
Some have distinct markings
Flattened body
Sharp margins on head
Club-shaped antennae
Abdominal segments protrude from elytra
six abdominal sternites
Carrion beetles or burying beetles
Large beetles
Some have distinct markings
Flattened body
Sharp margins on head
Club-shaped antennae
Abdominal segments protrude from elytra
six abdominal sternites
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SilphidaeSilphidaeSilphidaeSilphidae
Found all over
Show up early in decomposition
Adults/larvae stay until dry stage
May feed on carrion
Most eat fly larvae
Found all over
Show up early in decomposition
Adults/larvae stay until dry stage
May feed on carrion
Most eat fly larvae
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Silphidae LarvaeSilphidae LarvaeSilphidae LarvaeSilphidae Larvae2 Sub-families: Silphinae and Nicrophorinae
Silphinae--large carcasses
Cluster 6 ocelli on each side of head
Sporadically sclerotized
Nicrophorinae--small carcasses
Single ocellus on each side
Heavily sclerotized
2 Sub-families: Silphinae and Nicrophorinae
Silphinae--large carcasses
Cluster 6 ocelli on each side of head
Sporadically sclerotized
Nicrophorinae--small carcasses
Single ocellus on each side
Heavily sclerotized
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Carolina Carrion BeetleNicrophorus carolinus
American Burying BeetleNicrophorus americanus
Nicrophorus
orbicollis
Sexton beetle Gold-necked Carrion BeetleNicrophorus tomentosus
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American Carrion beetleNecrophila americana
Carrion BeetleOiceoptoma noveboracense
Carrion BeetleOiceoptoma rugulosum
Lapland Carrion Beetle
Thanatophilus lapponicus
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DermestidaeDermestidaeDermestidaeDermestidae
Skin beetles, Leather beetles, Hide beetles, Carpet beetles, Larder beetles
World wide distribution--500 species
123 found in US
2-12 mm
Round-oval shaped
Covered in scales
Skin beetles, Leather beetles, Hide beetles, Carpet beetles, Larder beetles
World wide distribution--500 species
123 found in US
2-12 mm
Round-oval shaped
Covered in scales
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Skin beetle or Hide beetle
Dermestes ater
Skin beetleDermestes maculatus
Varied Carpet beetleAnthrenus verbasci
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Varied Carpet beetleAnthrenus verbasci
“wooly bear”
Skin beetle or Hide beetle
Dermestes aterSkin beetle
Dermestes maculatus
FRASS
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HisteridaeHisteridaeHisteridaeHisteridae
Clown Beetles or Hister Beetles
3000 species, 500 found in US
Under 10 mm in length
Rounded, shiny black
Most species associated with decaying matter
Clown Beetles or Hister Beetles
3000 species, 500 found in US
Under 10 mm in length
Rounded, shiny black
Most species associated with decaying matter
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HisteridaeHisteridaeHisteridaeHisteridae
Certain species on carrion and excrement
On carcasses, stay concealed
Adults and larvae predaceous
Isolated in collection
Certain species on carrion and excrement
On carcasses, stay concealed
Adults and larvae predaceous
Isolated in collection
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Clown BeetleHister quadrinotatus
Clown BeetleHister sedakovi
Clown BeetleSaprinus pennsylvanicus
Bloat-dry fresh-late
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NitidulidaeNitidulidaeNitidulidaeNitidulidaeSap beetles
2500 species world wide, 183 in US
Variable in appearance
Dark in color
4-12 mm, oval shaped
some look like staphylinidae, but have clubbed antennae
clubbed antennae
V
Sap beetles
2500 species world wide, 183 in US
Variable in appearance
Dark in color
4-12 mm, oval shaped
some look like staphylinidae, but have clubbed antennae
clubbed antennae
V
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NitidulidaeNitidulidaeNitidulidaeNitidulidae
Few species attracted to carrion
More advanced stages of decay
Prefer moist environments
Little known about importance
Few species attracted to carrion
More advanced stages of decay
Prefer moist environments
Little known about importance
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Omosita colon
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Any questions?