Bald-faced hornet viable brood in the comb fragment. The physical nature of cues mediating natal comb recognition is unknown, though some researchers propose distinct cuticular hydrocarbon profiles allow wasps to recognize nest mates. "D. maculata" is characterized by low paternity, worker reproduction and queen-worker conflict. Divergent genetic interests between workers and their queen cause intra-nest struggle for control, which disrupts social organization. Because of haplodiploidy, workers are unable to mate. However, their unfertilized eggs become males. Workers and their queens are most related to their own sons. Natural selection will therefore favor those workers who produce their own sons rather than rearing
Vanzolini's bald-faced saki Vanzolini's bald-faced saki Vanzolini's bald-faced saki ("Pithecia vanzolinii") is a species of saki monkey, a type of New World monkey. Its range is in western Brazil. The monkey is named after Brazilian zoologist Paulo Vanzolini. This species was originally described by Hershkovitz as the subspecies "Pithecia irrorata vanzolinii" based on individuals collected in 1936 by Alfonso M. Olalla, but it was raised to full species status in 2014. For many years, there had been no record of the species in nature. Further specimens were collected in 1956 by Fernando Novaes (the then director of the Goeldi Museum in Pará) and