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Beetles of Forensic Importance 3

Beetles of Forensic Importance 3. March 13, 2009. Beetles of Forensic Importance. Staphylinidae (Rove beetles) Silphidae (Carrion beetles) Scarabidae (Scarab beetles) Histeridae (Hister or clown beetles) Dermestidae (Skin beetles) Cleridae (Checkered beetles) Carabidae (Ground beetles).

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Beetles of Forensic Importance 3

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  1. Beetles of Forensic Importance 3 • March 13, • 2009

  2. Beetles of Forensic Importance • Staphylinidae (Rove beetles) • Silphidae (Carrion beetles) • Scarabidae (Scarab beetles) • Histeridae (Hister or clown beetles) • Dermestidae (Skin beetles) • Cleridae (Checkered beetles) • Carabidae (Ground beetles)

  3. 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

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

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

  6. Cleridae • 3500 species • Over 500 in North America • Often brightly colored • Bristly hairs • 3-12 mm • Narrow pronotum • Variable antennae

  7. Cleridae • Predaceous • Adults frequent flowers • Dryer stages of decay

  8. Necrobia rufipes

  9. Scarabidae • One of largest beetle families • 19,000 species • 1400 North America • Elongate, robust, convex • Decomposers

  10. Scarabidae • Sub family Scarabaeinae • Dung beetles, tumblebugs • Less than 1 inch • Larvae large and c-shaped • 14 species

  11. Deltochilum gibbosum gibbosum Phaneus vindex

  12. Trogidae--Hide Beetle • Sometimes treated as subfamily of Scarabidae • Troginae • 50 species in North America • 5-20 mm • Oblong to oval • Rough dorsum

  13. Trox suberosus

  14. Carabidae • Ground Beetles • 40,000 species • 1200-2500 species in North America • Omnivorous • Generally nocturnal

  15. Carabidae • First abdominal sternite divided by hind coxae • Heat at eyes narrower than pronotum • Antennae threadlike • Black and shiny with striated elytra

  16. Life Cycle • Spring or Autumn Breeders • Egg production related to food supply and size • 5-10 eggs or several hundred • Larvae--external digestion • Development takes 1 year

  17. 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

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

  19. Omosita colon

  20. Any Questions?

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