Definition: A group of hydrous aluminium phyllosilicate (phyllosilicates being a subgroup of silicate minerals) minerals (see clay minerals), that are typically less than 2micrometres in diameter. Clay consists of a variety of phyllosilicate minerals rich in silicon and aluminium oxides and hydroxides which include variable amounts of structural water.
Known occurrences, collected specimens and observations of Elaphrus (Elaphroterus) angusticollis angusticollis R. F. Sahlberg 1844. View this species on GBIF
