Brachiopoda) in the Les Valisettes Formation (Late Frasnian of the Philippeville Anticlinorium, Southern Belgium)
bulletin de l'institut royal des sciences naturelles de belgique sciences de la terre, 74: 35-44, 2004 bulletin van het koninklijk belgisch instituut voor natuurwetenschappen aardwetenschappen, 74: 35-44, 2004 The genus Iowatrypa Copper, 1973 (Brachiopoda) in the Les Valisettes Formation (late Frasnian of the Philippeville Anticlinorium, southern Belgium). by Bernard MOTTEQUIN Mottequin, B., 2004. - The genus Iowatrypa Copper, 1973 (Brachio¬ 1973. Costatrypa''% highest occurrence is less than 1 m poda) in the Les Valisettes Formation (late Frasnian of the Philippeville below the base of the Matagne Formation at position Anticlinorium, southern Belgium). Bulletin de l'Institut royal des Sciences naturelles de Belgique, Sciences de la Terre, 74: 35-44, eight meters higher than the level previously reported 1 pl., 4 figs., 1 table, Bruxelles-Brussel, March 31, 2004. - ISSN 0374- by Godefroid & Helsen (1998, p. 266, fig. 21). 6291. The dominant atrypids of the Les Valisettes Formation include species of the genera Iowatrypa and Costatrypa. Less abundant are species of the genera Spinatrypa (Spi- Abstract natrypa) Stainbrook, 1945, Desquamatia (Desquama- tia) Alekseeva, 1960, and A new species of the genus Iowatrypa Copper, 1973 [/. philippevil- possibly Waiotiypa Balinski, lensis n. sp. (Pseudogruenewaldtiinae)] is described from the late 1997. Spinatrypina Rzhonsnitskaya, 1964 may also be Frasnian (Upper Palmatolepis rhenana Zone) Les Valisettes Formation present in the massive reddish-pinkish limestone mounds (Philippeville Anticlinorium). developed within the formation but requires further in¬ Key-words: Brachiopods. Atrypida. Late Frasnian. Systematic pa- vestigation to confirm its occurrence. laeontology. All figured and measured specimens are stored at the Royal Belgian Institute of natural Sciences at Brussels, where they are numbered IRScNB al 1993 - a 12001.
[Show full text]