FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
denticle belt & embryonic prothoracic segment
In tsh mutants the T1 denticle belt is absent and the denticles themselves are smaller and more disorganized than wild type.
tshunspecified has denticle belt & embryonic thoracic segment phenotype, enhanceable by spenunspecified
tshunspecified has denticle belt & embryonic abdominal segment 1 phenotype, enhanceable by spenunspecified
tshunspecified is a non-suppressor of phenotype of arm3
spenunspecified, tshunspecified has denticle belt & embryonic thoracic segment phenotype
When also mutant for spen the denticle belts are missing from all thoracic segments, and the A1 denticle belt is poorly defined.