Heterotrypa
Heterotrypa sp. in longitudinal (left) and tangential (right) sections. Field of view is 1.0 mm. SMH collection.
Heterotrypa is frondose, ramose, or less commonly encrusting, and it often bears monticules. Typically, endozone has few diaphragms, but diaphragms are commonly regular and closely spaced in exozone. Walls vary in thickness. Mesozooids are often common, but may be absent, and are commonly beaded proximally and tend to terminate within exozone. Heterotrypa has two types of styles. One type occurs within all or part of exozone, lies between zooecial corners, and may be offset from the wall. The other type is larger, starts in both endozone and exozone, lies at zooecial corners, and typically terminates within the exozone.
Species
Heterotrypa cystata (Cumings, 1901)
Occurrence: Mount Hope, Fairmount, Bellevue, Corryville, Mount Auburn, Arnheim, Whitewater
Reference: Brown and Daly, 1985; Schumacher et al. in Davis and Cuffey, 1998 (mention)
Also called Dekayella cystata and Dekayia frondosa cystata
Heterotrypa foliacea (Ulrich and Bassler, 1904)
Occurrence: Clays Ferry
Reference: Karklins, 1984
Also called Dekayella foliacea, Dekayella milleri, Heterotrypa foerstei
Heterotrypa frondosa (d'Orbigny, 1850)
Occurrence: Mount Hope, Fairmount, Bellevue, Corryvilles, Mount Auburn, Arnheim
Reference: Singh, 1979; Brown and Daly, 1985; Cuffey in Davis and Cuffey, 1998 (mention)
Originally named Monticulipora frondosa. Also called Chaetetes frondosus, Dekayia frondosa, Dekayia perfrondosa.
Heterotrypa inflecta Ulrich, 1890
Occurrence: Corryville, Whitewater
Reference: Dalvé, 1948; Schumacher et al. in Davis and Cuffey, 1998 (mention)
Heterotrypa lobata (Cumings)
Occurrence: Fairmount
Reference: Dalvé, 1948
Heterotrypa microstigma Cumings and Galloway, 1915
Occurrence: Waynesville
Reference: Brown and Daly, 1985
Heterotrypa paupera (Ulrich, 1883)
Occurrence: Corryville
Reference: Dalvé, 1948
Originally named Dekayia paupera.
Heterotrypa robusta (Foord, 1884)
Occurrence: McMicken, Mount Hope, Fairmount
Reference: Brown and Daly, 1985
Also called Dekayella robusta, Monticulipora ohioensis, Dekayia ulrichi robusta, Dekayia ulrichi expansa, and Dekaykia ulrichi lobata
Heterotrypa singularis Ulrich, 1890
Occurrence: Whitewater
Reference: Utgaard and Perry, 1964
Also called Monticulipora singularis
Heterotrypa solitaria Ulrich, 1883
Occurrence: Fairmount, Bellevue
Reference: Singh, 1979; Brown and Daly, 1985; Cuffey in Davis and Cuffey, 1998 (mention)
Heterotrypa subfrondosa (Cumings, 1902)
Occurrence: Mount Hope, Fairmount
Reference: Brown and Daly, 1985
Also called Dekayia subfrondosa
Heterotrypa subpulchella (Nicholson, 1875)
Occurrence: Fairmount
Reference: Dalvé, 1948
Originally named Chaetetes subpulchellus. Also called Monticulipora subpulchella.
Heterotrypa subramosa (Ulrich, 1879)
Occurrence: Waynesville
Reference: Utgaard and Perry, 1964; Dalvé, 1948
Originally named Atactopora subramosa. Includes Heterotrypa prolifica
Heterotrypa ulrichi (Nicholson, 1881)
Occurrence: Kope
Reference: Bassler, 1906; Anstey and Perry, 1972; Anstey and Wilson, 1996
Originally named Monticulipora (Heterotrypa) ulrichii. Also called Dekayella ulrichi. Includes Monticulipora ohioensis James, 1884 and Dekayella robusta Foord, 1884.
