C. solida

C. solida may refer to:


 * Archips solidus, a species of moth, synonymized as Cacoecia solida Meyrick, 1908
 * Cellana solida, a species of sea snail
 * Clathrodrillia solida, the solid drillia, a species of sea snail
 * Clavaria fragilis, fairy fingers, a fungus synonymized as Clavaria solida Gray, 1821
 * Coelolepis solida, an extinct species of jawless fish
 * Corydalis solida, the fumewort, a flowering plant of northern Eurasia
 * Crepidula adunca, a species of sea snail, synonymized as Crepidula solida Hinds, 1845
 * Eucithara solida, a species of sea snail, synonymized as Cytharopsis solida (Reeve, 1846)