Merriam-Webster Collegiate Dictionary - detritivore

 noun  Etymology: International Scientific Vocabulary detritus + -i- + -vore (from Latin -vorus -vorous)  Date: 1959 an organism (as an earthworm or a fungus) that feeds on dead and decomposing organic matter DETRITUS  noun  (plural ~)  Etymology: French detritus, from Latin ~, past participle of deterere  Date: 1802  1. loose material (as rock fragments or organic particles) that results directly from disintegration  2.  a. a product of disintegration, destruction, or wearing away ; debris  b. miscellaneous remnants ; odds and ends sifting through the ~ of his childhood — Michael Tomasky  • detrital adjective