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Swiss Journal of Palaeontology
Fig. 12 | Swiss Journal of Palaeontology

Fig. 12

From: Emergence and early radiation of cyrtocrinids, with new species from a Lower to Middle Jurassic rock reef of Feuguerolles (Normandy, France)

Fig. 12

Praetetracrinus inornatus, basal circlets and columnals. a–m Praeteracrinus inornatus (Simms). a Basal circlet lateral; MHNLM 2015.1.82, sample 082-3, middle Toarcian (Bifrons Chronozone), Feuguerolles (Normandy). b Basal circlet, b1 distal (upper), b2 proximal (lower); MHNLM 2015.1.83, sample 082-2, middle Toarcian (Bifrons Chronozone), Feuguerolles (Normandy). c Basal circlet distal; MHNLM 2015.1.84, sample 490-3, middle Toarcian (Bifrons Chronozone), Feuguerolles (Normandy). d Basal circlet, d1 distal (upper), d2 proximal (lower); MHNLM 2015.1.85, sample 325-5, middle Toarcian (Bifrons Chronozone), Feuguerolles (Normandy). e Facet of proximal columnal; MHNLM 2015.1.86, sample 457-2, late Toarcian (Variabilis Chronozone), Feuguerolles (Normandy). f Topmost columnal, f1 upper facet with extension of radial cavity, f2 lower facet to column; MHNLM 2015.1.87, sample 082-1, middle Toarcian (Bifrons Chronozone), Feuguerolles (Normandy). g Cylindrical columnal, g1 lateral with furrows, g2 facet with three groups of crenulae; MHNLM 2015.1.88, sample 308-1, late Toarcian (Variabilis Chronozone), Feuguerolles (Normandy). h Cylindrical columnal, h1 lateral with furrows, h2 facet; MHNLM 2015.1.89, sample 325-6, middle Toarcian (Bifrons Chronozone), Feuguerolles (Normandy). i Cylindrical columnal, i1 lateral with epizoans, i2 facet; MHNLM 2015.1.90, sample 325-3, middle Toarcian (Bifrons Chronozone), Feuguerolles (Normandy). j Barrel-shaped columnal with weakly expressed facet, j1 lateral, j2 facet; MHNLM 2015.1.91, sample 370-3, middle Toarcian (Bifrons Chronozone), Feuguerolles (Normandy). k Barrel-shaped columnal, k1 lateral, k2 facet with perilumen, areola and crenulated rim; MHNLM 2015.1.92, sample 370-5, middle Toarcian (Bifrons Chronozone), Feuguerolles (Normandy). l Cylindrical columnal, l1 lateral, l2 tetramerous facet; MHNLM 2015.1.93, sample 389-1, late Toarcian (Thouarsense Chronozone), Feuguerolles (Normandy). m cylindrical columnal, m1 lateral, m2 facet with weakly expressed crenulae; MHNLM 2015.1.94, sample 400, early Aalenian (Opalinum Chronozone, last occurrence of species), Feuguerolles (Normandy)

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