This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.
L. Hints, 2015 - The Hirnantian (Late Ordovician) brachiopod fauna of the East Baltic: Taxonomy of the key species - Acta Palaeontologica Polonica (60), 395-420 (journal article, English)
J. Colmenar, 2014 - A draboviid brachiopod association from the Upper Ordovician of Portugal: palaeoecological and palaeogeographical significance - GFF - Journal of the Geological Society of Sweden (136), 60-64 (journal article, English)
L. Hints, 2012 - New Hirnantian orthide brachiopods from the type section of the Porkuni Stage (Porkuni quarry, northeastern Estonia) - Estonian Journal of Earth Sciences (61), 227-241 (journal article, English)
J. J. Sepkoski, Jr., 2002 - A compendium of fossil marine animal genera - Bulletins of American Paleontology (363), 1-560 (serial monograph, English)
R. A. Astini, 1992 - El ,Ashgilliano tardio (Hirnantiano) del Cerro la Chilca, Precordillera de San Juan, Argentina - Ameghiniana (29), 249-264 (journal article, Spanish)
J. Bergström, 1968 - Upper Ordovician Brachiopods from Västergötland, Sweden - Geologica et Palaeontologica (2), 1-35 (journal article, English)