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5 results for “Porpoceras”
FIG. 1 in Revised stratigraphic range of the Toarcian ammonite genus Porpoceras Buckman, 1911
FIG. 1. — Early and Middle Toarcian ammonite biostratigraphy for the NW European realm, with stratigraphic occurrences of the genus Porpoceras Buckman, 1911 in the NW European realm and Morocco (Guex 1973). Modified after Rulleau et al. (2013).
FIG. 2 in Revised stratigraphic range of the Toarcian ammonite genus Porpoceras Buckman, 1911
FIG. 2. — Simplified map of the Early and Middle Toarcian up to the Variabilis subzone in the Thouars area (Western France). Modified after Bécaud (2006).
FIG. 3. — A in Revised stratigraphic range of the Toarcian ammonite genus Porpoceras Buckman, 1911
FIG. 3. — A, Stratigraphic succession of Middle Toarcian beds in the Airvault quarry; B, close-up view of the upper part of the Variabilis subzone in the Airvault quarry, with a Porpoceras specimen (UBGD 279076, see Fig. 5A) in situ indicated with a circle.
FIG. 5. — A, B in Revised stratigraphic range of the Toarcian ammonite genus Porpoceras Buckman, 1911
FIG. 5. — A, B, Specimens of Porpoceras gr. vortex (Simpson, 1855) -verticosum Buckman, 1914 from the Variabilis Subzone of the Airvault quarry; A, UBGD 279076; B, UBGD 279077; C, specimen UBGD 279075 of Porpoceras gr. vortex-verticosum from the Bifrons Horizon of the Belmont quarry. Scale bars: 10 mm.
FIG. 4. — A in Revised stratigraphic range of the Toarcian ammonite genus Porpoceras Buckman, 1911
FIG. 4. — A, Hildoceras sublevisoni Fucini, 1919 (UBGD 279080, Sublevisoni Subzone, Airvault); B-H, Porpoceras gr. vortex (Simpson, 1855) -verticosum Buckman, 1914 (B-E, UBGD 279078, Bifrons Horizon, Airvault; F-H, UBGD 279079, Bifrons Horizon, Airvault); I, Hildoceras bifrons (Bruguière, 1789) (UBGD 279081), Bifrons Horizon, Airvault); J, Haugia variabilis (d'Orbigny, 1844) (UBGD 279082), Variabilis subzone, Airvault). Scale bars: 10 mm.
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