Dekayia
Dekayia sp. in longitudinal (left) and tangential (right) sections. Field of view is 1.0 mm. SMH collection.
Dekayia may be ramose, encrusting, or massive, typically with low or flush monticules. Diaphragms typically absent in endozone and are also either absent or widely spaced in exozone. Zooecial walls are crenulated to undulatory for their entire length, but especially so at the zooecial bend; walls also show irregular thickenings in exozone. Mesozooids are commonly rare or absent between monticules, and they are typically beaded. Dekayia bears styles, which may start in both endozone and exozone, lie at zooecial corners (rarely between corners), and typically terminate within the exozone. A few species also have styles that originate in the exozone, lie between zooecial corners, and that are offset from the zooecial walls.
Species
Dekayia apressa Ulrich, 1883
Occurrence: Corryville, Dillsboro
Reference: Brown and Daly, 1985
Dekayia aspera Milne-Edwards and Haime, 1851
Occurrence: McMicken, Mount Hope, Fairmount, Bellevue, Arnheim
Reference: Anstey and Perry, 1972; Singh, 1979; Brown and Daly, 1985; Anstey and Wilson, 1996; Cuffey in Davis and Cuffey, 1998 (mention)
Dekayia catenulata (Cumings and Galloway, 1915)
Occurrence: Arnheim
Reference: Brown and Daly, 1985
Formerly called Stigmatella catenulata
Dekayia inflecta Author unknown
Occurrence: Grant Lake
Reference: Cuffey in Davis and Cuffey, 1998 (mention)
Dekayia maculata James, 1881
Occurrence: McMicken (abundant), Mount Hope, Corryville, Mount Auburn, Arnheim
Reference: Bassler, 1906; Brown and Daly, 1985
Also called Monticulipora (Dekayia) maculata
Ramose, with thick walls, prominent acanthopores, sparse and thin diaphragms, almost no mesopores, and large zooecia.
Dekayia magna Cumings, 1901
Occurrence: Fairmount, Bellevue, Arnheim
Reference: Brown and Daly, 1985; Cuffey in Davis and Cuffey, 1998 (mention)
Dekayia mesospinosa Brown and Daly, 1985
Occurrence: Dillsboro
Reference: Brown and Daly, 1985; Cuffey in Davis and Cuffey, 1998 (mention)
Dekayia multispinosa Ulrich, 1883
Occurrence: Mount Hope, Fairmount, Bellevue, Corryville, Mount Auburn, Arnheim
Reference: Brown and Daly, 1985
Dekayia pelliculata Ulrich, 1883
Occurrence: Mount Hope, Fairmount
Reference: Singh, 1979; Brown and Daly, 1985
Dekayia prolifica Author unknown
Occurrence: Grant Lake
Reference: Cuffey in Davis and Cuffey, 1998 (mention)
Dekayia semipilaris (Ulrich, 1890)
Occurrence: Mount Hope, Fairmount, Whitewater
Reference: Brown and Daly, 1985; Schumacher et al. in Davis and Cuffey, 1998 (mention)
Originally named Leptotrypa semipilaris. Also called Cyphotrypa semipilaris.
Dekayia stidhami (Ulrich, 1890)
Occurrence: Mount Hope, Fairmount, Whitewater, Saluda
Reference: Brown and Daly, 1985
Originally named Leptotrypa stidhami. Also called Monticulipora stidhami and Cyphotrypa stidhami.
