Scientific Classification
| Kingdom: Animalia |
| Phylum: Brachiopoda |
| Class: Rynchonellata |
| Order: Atrypida |
| Family: Atrypidae |
| Genus: Spinatrypa |
| Species: Spinatrypa spinosa (Hall, 1843) |
Information
Geological Range
Paleogeographic Distribution
Stratigraphic Occurrences
References
Hall (1843): Original description and illustration: p. 200.
Hall (1867) (as Atrypa spinosa vel A. aspera): p. 322, pl. 53A.
Linsley (1994): p. 190, figs. 1-15.
Wilson, K., 2014: pp. 106, 107.
Remarks
Originally described as Atrypa spinosa by Hall in 1843. Recombined as Hystricina spinosa by Stainbrook in 1945, but due to already being used previously, was changed to Spinatrypa spinosa by Stainbrook in 1951.
From Wilson (2014, p. 107): “Medium-sized shell, with valves almost equally convex, marked by coarse plications ending in spine bases at the growth lines (spines rarely preserved). To 25-30 mm.”
From Carlton Brett and Gordon Barid: “Spinatrypa spinosa is a distinctive form; well preserved specimens display spines as long as 10 mm on both valves but these are frequently broken off. It is typical of carbonate rich facies and calcareous shales often associated with highly diverse brachiopod and coral biofcies. It is relatively common in Eifelian Onondaga, Columbus, Heffersonville and Grand Tower Formaitons. However, it does not reappear in any abundance with the exception of scattered occurrences through most of the Hamilton Group. In the Windom Member it abruptly becomes common in the Bay View, Fall Brook and South Lansing coral beds though lacking in most beds. It then occurs in the Tully Formation in some abundance both in the lower and higher units. This curious range is unexplained. It is unclear where the species was hiding through most of the Givetian or why it abruptly became common in the very high Hamilton and Tully.”
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