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Developmental noise in P. entomophagus and P. pacificus. (Upper) In P. entomophagus RS145, the most common developmental error is a misspecification of P5.p. Instead of adopting the 2° fate, P5.p forms an independent invagination (arrow) that does not connect to the uterus. (Lower) In P. pacificus, very rarely P7.p, instead of adopting the 2° fate, remains undivided (3° fate, arrow).
