Summary description from Wikipedia:

Prionus californicus in languages:

English

California Prionus

English

California Root Borer

English

California Root Borer Beetle

Images from inaturalist.org observations:

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Parent Taxon

• Prionus

Sibling Taxa

• Prionus aztecus
• Prionus californicus
• Prionus coriarius
• Prionus corpulentus
• Prionus delavayi
• Prionus fissicornis
• Prionus flohri
• Prionus heroicus
• Prionus howdeni
• Prionus imbricornis
• Prionus insularis
• Prionus laminicornis
• Prionus laticollis
• Prionus lecontei
• Prionus mexicanus
• Prionus nakamurai
• Prionus pocularis
• Prionus poultoni
• Prionus scabripunctatus
• Prionus sejunctus

Child Taxa

• Prionus californicus californicus
• Prionus californicus compar

Top Observation Places

• Flagstaff
• Redding
• Boise
• Spokane
• Folsom
• Thousand Oaks
• Simi Valley
• Santa Rosa
• Walnut Creek
• Redwood City
• Palo Alto
• Escondido
• El Cajon
• Vista
• San Marcos
• Mira Mesa
• Encinitas
• La Mesa
• Rancho Penasquitos
• Santee
• Poway