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We combine photometric and spectroscopic data on twelve modes excited in FGVir to determine their spherical harmonic degrees, $\ell$, and to obtainconstraints on the star model. The effective temperature consistent with themean colours and the pulsation data is about 7200K. In six cases, the $\ell$identification is unique with above 80 % probability. Two modes are identifiedas radial. Simultaneously with $\ell$, we determine a complex parameter $f$which probes subphotospheric stellar layers. Comparing its values with thosederived from models assuming different treatment of convection, we findevidence that convective transport in the envelope of this star is inefficient.Comment: 9 pages, 8 figures, accepted for publication in A&

Inferences from pulsational amplitudes and phases for multimodeδSct star FG Vir