Russian language
Russian is notable for its distinction based on palatalization of most of the consonants. While /k/, /ɡ/, /x/ do have palatalized allophones [kʲ, ɡʲ, xʲ], only /kʲ/ might be considered a phoneme, though it is marginal and generally not considered distinctive (the only native minimal pair which argues for /kʲ/ to be a separate phoneme is "это ткёт" ([ˈɛtə tkʲɵt], 'it weaves')/"этот кот" ([ˈɛtət kot], 'this cat')). Palatalization means that the center of the tongue is raised during and after the articulation of the consonant. In the case of /tʲ/ and /dʲ/, the tongue is raised enough to produce slight frication (affricate sounds). These sounds: /t, d, ts, s, z, n and rʲ/ are dental, that is pronounced with the tip of the tongue against the teeth rather than against the alveolar ridge.

Q: How are 'dental' sounds pronounced?
with the tip of the tongue against the teeth rather than against the alveolar ridge