The following information accompanied stocks donated to the Bloomington Stock Center by Susan Haynes, National Institute of General Medical Sciences.
caz8b is an EMS-induced, recessive lethal mutation isolated by Dipak Mahato and Jim Mahaffey as a recessive lethal mutation failing to complement Df(1)4b18. It was originally called l(1)8b. caz1 is a synonym, but it is not the same as the caz1 genotype used by Wang et al. (http://flybase.org/reports/FBrf0216240.html) to refer to the combination of Df(1)383 and P{CG32576.+t5.0}.
caz5g11 is a recessive lethal mutation originating in the work of Stanewsky et al. (http://flybase.org/reports/FBrf0064715.html) and used by Rutherford (http://flybase.org/reports/FBrf0083559.html). It is currently denoted l(1)5g115g11. It is likely an EMS-induced mutation. caz2 is a synonym, but it is not the same as the caz2 allele described by Frickenhaus et al. (http://flybase.org/reports/FBrf0227831.html).
The molecular natures of caz8b and caz5g11 are not known. Hemizygotes and transheterozygotes are lethal with at least some mutants surviving to pharate adults.
P{caz+t5} is a caz genomic rescue construct in a CaSpeR-class vector carrying an insertion of approximately 5 kb including approximately 700 bp upstream of caz. It rescues the lethality of caz mutant males as well as caz8b/caz5g11 females and females with caz mutations combined with Df(1)4b18. 
P{caz+t5}3 is a third chromosome insertion.