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Trematidae

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Journal Article
Published: 01 November 2016
Journal of Paleontology (2016) 90 (6): 1068–1080.
..., and rows of pustules are slightly more densely spaced (approximately seven per millimeter), whereas L . matutinum Cooper, 1956 , differs from the Argentinean species in having fewer and more widely spaced radial rows. Superfamily Discinoidea Gray, 1840 Family Trematidae Schuchert, 1893...
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Journal Article
Published: 27 February 2006
Canadian Journal of Earth Sciences (2006) 43 (1): 23–39.
... with an asterisk) (18.2%, 16/88). Lingulida— Linguloidea: Pseudolingulidae*, Obolidae*, Dysoristidae* ( Mergl 2001 ), Paterulidae* ( Mergl 2001 ). Discinoidea: Trematidae, Discinidae. Acrotretida—Acrotretoidea: Acrotre-tidae*, Scaphelasmatidae*, Torynelasmatidae*, Biernatidae*. Siphonotretida—Siphonotretoidea...
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