claim: The American Civil War began in 1861.
evidence: Neuroterus numismalis is a gall wasp that forms chemically induced leaf galls on oak trees .. Neuroterus. Neuroterus. gall wasp. gall wasp. gall. gall. It has both bisexual and agamic -LRB- parthenogenetic -RRB- generations and forms two distinct galls on oak leaves , the Silk button gall and Blister gall .. gall. gall. parthenogenetic. parthenogenetic. The galls can be very numerous with more than a thousand per leaf .