This study presents the identification and the best photometric solution of 92 low mass ratio (LMR) totally eclipsing contact binaries in Catalina Sky Survey data, among which 37 are new discoveries, six are candidates for mergers, and a unique ultra -short period LMR. C1 [Christopoulou, P. -E; Lalounta, E.; Papageorgiou, A.] Univ Patras, Dept Phys, Patras 26500, Greece. [Lopes, C. E. Ferreira] Univ Atacama, Inst Astronomia & Ciencias Planetarias, Copayapu 485, Copiapo, Chile. [Catelan, M.] Pontif Univ Catol Chile, Fac Fis, Inst Astrofis, Ave Vicuna Mackenna 4860, Macul 7820436, Santiago, Chile. [Catelan, M.] Millennium Inst Astrophys MAS, Nuncio Monsenor Sotero Sanz 100,Of 104, Providencia, Santiago, Chile. [Catelan, M.] Pontif Univ Catol Chile, Fac Fis, Ctr Astroingenieria, Ave Vicuna Mackenna 4860, Macul 7820436, Santiago, Chile. [Drake, A. J.] CALTECH, 1200 East Calif Blvd, Pasadena, CA 91225 USA. C3 University of Patras; Universidad de Atacama; California Institute of Technology