d="p-1">Four new species of colonial corals, one previously described coral, and two other unidentified species of coral have been recovered from the Baird Formation in the Klamath Mountains of northwestern California. The newly erected species are d-content genus-species" id="named-content-1">Heritschioides armstrongi n. sp., d-content genus-species" id="named-content-2">Pararachnastraea klamathensis n. sp., d-content genus-species" id="named-content-3">P. watkinsi n. sp., and d-content genus-species" id="named-content-4">P. kabyaiensis n. sp. These corals are associated with the fusulinids d-content genus-species" id="named-content-5">Millerella marblensis d="xref-ref-22-1" class="xref-bibr">Thompson, 1944, d-content genus-species" id="named-content-6">Paramillerella d="xref-ref-23-1" class="xref-bibr">Thompson, 1951, and d-content genus-species" id="named-content-7">Pseudostaffella d="xref-ref-21-1" class="xref-bibr">Thompson, 1942, emend d="xref-ref-7-1" class="xref-bibr">Groves, 1984, suggesting an early Atokan (Bashkirian) age. Both the coral and foraminiferal faunas bear a resemblance to those of similar age in the Brooks Range, Alaska, which could suggest geographic proximity between the two terranes at that time. These corals also represent the earliest known occurrence of the Family Durhamididae.