Embryos show early defects in Malpighian tubule bud evagination and later have convoluted Malpighian tubules. Proventriculus morphogenesis and pharynx invagination are incomplete and embryos have a wide, corrugated oesophagus. Midgut constrictions do not form. Head involution is incomplete and tracheae are abnormal.
I. Kiss.
This allele was listed in the BDGP database as a lethal or sterile line during the period 1994-1999, but was discarded from the gene disruption project prior to the summary publication (FBrf0111489). Reasons for excluding lines from the collection described in FBrf0111489 include presence of more than one P insertion on the mutant chromosome, separation of lethality (or sterility) from the location of the insertion, and loss of lethality (or sterility) from the stock. Further information is available from http://www.fruitfly.org/bfd/ and from Dr. Spradling (spradling@mail1.ciwemb.edu).
The phenotype is reverted by excision of the P{lacW} element.