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Beetles of Forensic Importance pt. 2

Beetles of Forensic Importance pt. 2. March 11, 2009. scutellum. Silphidae. 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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Beetles of Forensic Importance pt. 2

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  1. Beetles of Forensic Importance pt. 2 • March 11, • 2009

  2. scutellum

  3. Silphidae • 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

  4. Silphidae • Found all over • Show up early in decomposition • Adults/larvae stay until dry stage • May feed on carrion • Most eat fly larvae

  5. Silphidae Larvae • 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

  6. American Burying Beetle Nicrophorus americanus Carolina Carrion Beetle Nicrophorus carolinus Gold-necked Carrion Beetle Nicrophorus tomentosus Sexton beetle Nicrophorus orbicollis

  7. Carrion Beetle Oiceoptoma rugulosum Carrion Beetle Oiceoptoma noveboracense Lapland Carrion Beetle Thanatophilus lapponicus American Carrion beetle Necrophila americana

  8. Dermestidae • 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

  9. Skin beetle or Hide beetle Dermestes ater Skin beetle Dermestes maculatus Varied Carpet beetle Anthrenus verbasci

  10. Skin beetle or Hide beetle Dermestes ater Skin beetle Dermestes maculatus Varied Carpet beetle Anthrenus verbasci “wooly bear” FRASS

  11. Histeridae • 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

  12. Histeridae • Certain species on carrion and excrement • On carcasses, stay concealed • Adults and larvae predaceous • Isolated in collection

  13. Clown Beetle Hister quadrinotatus Clown Beetle Hister sedakovi Clown Beetle Saprinus pennsylvanicus Bloat-dry fresh-late

  14. Nitidulidae • 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

  15. Nitidulidae • Few species attracted to carrion • More advanced stages of decay • Prefer moist environments • Little known about importance

  16. Omosita colon

  17. Any questions?

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