BC Rock (The Missing Link)

Adult animated comedy with rock music soundtrack portraying a far-fetched explanation of the Dawn of Man. Le chaînon manquant (original title)
Cast (in credits order)

Ron Venable ... O (voice: English version)
John Graham ... Igua (voice: English version)
Bob Kaliban ... Croak / No Lobes (voice: English version)

Christopher Guest ... No Lobes (voice: English version)
Clark Warren ... No Lobes (voice: English version)

Bill Murray ... Dragon (voice: English version)
Mark Smith ... Narrator (voice: English version)
rest of cast listed alphabetically:
Joseph Plewa ... Bone (voice)

Jonathan Schmock ... Slick (voice)
James Vallely ... Stewie Babcock (voice)
key words:
Cartoon Nudity
Surrealism
Dinosaur
Sexual Joke
Baby Dinosaur
Satire
Adult Humor
Parody
Animated Sex
Caveman
Explicit Sexual Humour
Adult Animation
Cartoon Sex
Dinosaur Egg
Lampoon
Evolution
Darwinism
Cult Film
Sexual Humor
Cartoon Spoof
Sexual Arousal
Cartoon Violence
Spoof
Sex
Cartoon Dinosaur
Cult Director
Sexual Intercourse