1 Table S1. Parentage assignments in the free–living LuiKotale Bompusa bonobo group and the Taï Middle and South Western chimpanzee 2 groups. ID Bonobo3 Sex Mother Sire Mother – offspring mismatches infant infant infant infant Infant infant juvenile juvenile juvenile adolescent adolescent adolescent adolescent adult adult adult adult adult EVA HANNAH IRIS OLGA PAULA RIO MARTHA OLGA RIO HANNAH EVA n.a. PAULA ZOE MARTHA n.a. n.a. MARTHA Camillo Tito Tito Jack n.a. Tito n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 0 0 0 0 0 0 0 0 0 0 0 n.a. 0 0 0 n.a. n.a. 0 infant infant infant infant – juvenile juvenile – adolescent JESSICA JESSICA KADY NADESH KADY Urs Bob Léo Urs n.a. 0 0 0 0 0 Age class during study period Egon M Hugo M IDA F 4 OLIVIA F PEGGY F RITA F Moe M OPHELIA F Roque M Apollo* M Emil* M Max* M Pan* M Ben* M Camillo* M Dante* M Jack* M Tito* M Chimpanzee – Taï Middle JANINE Jonathan KASSIOPEÉ Noah KOULO F M F M F 1 Mismatches to next best female1 Parent – pair – offspring mismatches Mismatches to next best male2 5 4 5 5 3 3 3 4 4 0 0 0 1 n.a. 0 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 3 3 2 8 3 5 5 5 6 3 5 2 6 6 7 7 2 5 3 0 0 0 0 n.a. 3 5 4 4 4 Bob M Léo M UrsN M Chimpanzee – Taï South AKROUBA ALINA Caramel Huxel JAVA Kirikou Lukas Lula OPHELIA5 Ravel6 Téré7 Voltaire WALA Wamba YAOUNDE ZITA ZOE CÉLINE Kuba ATHÉNA ENDORA Ibrahim Inousha Jacobo Mustapha Oreste RÉBECCA Romario SETTUT F F M M F M M M F M M M F M F F F F M F F M M M M M F M F adult adult adult n.a. NADESH n.a. n.a. n.a. n.a. n.a. 0 n.a. infant infant infant infant infant infant infant infant infant infant infant infant infant infant infant infant infant infant – adolescent infant – adolescent infant – juvenile infant – juvenile infant – juvenile infant – juvenile infant – juvenile infant – juvenile infant – juvenile infant – juvenile infant – juvenile infant – juvenile ATRA ATRA COCO HARAKA JULIA KINSHASA LOUISE LOUISE OLIVIA RUBRA TITA VIRUNGA WAPI WAPI YUCCA ZORA ZORA COCO KABISHA ATRA EVA ISHA ISHA JULIA MARGOT OLIVIA RUBRA RUBRA SUMATRA Sagu n.a. Sagu Zyon Sagu Woodstock Kaos Sagu Zyon Zyon Zyon Sagu Besar Kaos Zyon Zyon Kaos Kaos Zyon Zyon Mkubwa Zyon n.a. n.a. n.a. n.a. n.a. Kaos Kaos 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 3 2 3 n.a. n.a. n.a. 2 5 3 0 n.a. 0 0 0 0 0 0 2 0 1 0 0 0 0 0 0 0 0 0 0 0 n.a. n.a. n.a. n.a. n.a. 0 0 2 2 3 3 2 6 3 2 5 2 3 5 3 4 4 3 5 3 4 3 5 3 5 5 4 3 2 3 4 Shogun8 Yao Max Olduvai Linus Utan Woodstock Gogol Taboo Yoghiti Besar Sagu Kaos Zyon M M M M M M M M M M M M M M infant – juvenile infant – juvenile juvenile juvenile juvenile – adolescent juvenile – adolescent juvenile – adolescent juvenile– adult juvenile– adult adolescent adolescent – adult adolescent – adult adult adult SUMATRA YUCCA MANDY OLIVIA LOUISE n.a. WAPI GARUDA TITA YUCCA n.a. SUMATRA n.a. n.a. Zyon Zyon Kaos n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 1 0 0 0 0 n.a. 0 0 0 0 n.a. 0 n.a. n.a. 2 3 4 7 5 5 2 4 6 5 1 0 0 n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. 6 4 5 4 5 3 5 2 4 4 2 4 2 4 3 4 Parentage was determined from genotypes comprised of 19 autosomal loci. As our chimpanzee study spans several years, the age class of an 5 individual might have changed over time. Maternal relationships known from behavior were confirmed in all infants and juveniles. All but one 6 assignment met the 99% confidence criterion (see footnote). Females are written in capitals. n.a., not assigned. 7 1 8 mother; 3 One adolescent female and two juveniles were not genotyped; 4 One mismatch (1 base pair indel common in that population) to assigned 9 sire; 5 One mismatch to mother at heterozygous locus (both alleles differ, one allele with one repeat unit difference to maternal allele), in triadic Reported only for male offspring being adolescent or adult in study period; 2 Reported for parent – pair comparisons with confirmed or assigned 10 comparison with potential sires one mismatch to the assigned sire at heterozygous locus (one repeat unit difference to one paternal allele); 6 11 Paternity assigned at 95% confidence level; 7 In triadic comparison one mismatch to the assigned sire at heterozygous locus (one repeat unit 12 difference); 8 One mismatch to mother at heterozygous locus (both alleles differ, one allele with one repeat unit difference to maternal allele). 3