In this work, the extended Gursey-Radicati mass formula is used to analyze the masses of the tetraquark system with configurations /, /, / and (Q = c, b). The discovery of two singly heavy tetraquark structures and at LHCb acts as a motivation for this work. They were observed in the and invariant mass spectra in two B-decay processes and , respectively. By using the SU(3) f flavor representation, we classified the recently observed singly heavy tetraquarks having quark content and in octet representation with J P value 0+ and forming the isospin triplet(I = 1). Our thorough comparison of mass spectra with both experimental and theoretical data demonstrates reasonable agreement. Further, decay channels and widths for the hidden-charm tetraquark states are computed in the framework of the diquark-antidiquark model. Our results may provide useful enlightenment for future experimental studies.