GPI-anchored chitinase involved in the degradation of chitin, a component of the cell walls of fungi and exoskeletal elements of some animals (including worms and arthropods). Required to reshape the cell wall at the sites where cell wall remodeling and/or cell wall maturation actively take place such as sites of conidia formation (By similarity). Random endo-hydrolysis of N-acetyl-beta-D-glucosaminide (1->4)-beta-linkages in chitin and chitodextrins. Localizes at the germ tubes of conidia, at hyphal branching sites and hyphal tips. Expression decreases during stationary and autolytic stages. Expression is induced during conidiospore formation (PubMed:9501518). Significantly up-regulated expression with colloidal chitin and chito-oligomers, namely N-acetyl-D-glucosamine (GlcNAc), N,N'-diacetylchitobiose (GlcNAc)2 and N,N',N''-triacetylchitotriose (GlcNAc)3. Expression is not affected by changes in the levels of reactive oxygen species or in the glutathione-glutathione disulfide redox balance, the changes which are physiological characteristics developing in aging and autolyzing fungal cultures. Down-regulated by the oxidative-stress-generating agent diamide, but not by menadione or hydrogen peroxide (PubMed:17455791). O-glycosylated but not N-glycosylated. Decreases the frequency of germination. Belongs to the glycosyl hydrolase 18 family. Chitinase class III subfamily.