Carinathilda saulae Kaim, 2004
Sugerowana cytacja: Gryz, P. 2020. Carinathilda saulae Kaim 2004. Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/view/Species/Carinathilda+saulae)
Diagnoza Shell broadly cone-shaped, 1.47 times as high as broad. Protoconch highly medioaxial, ornamented by abapical axial folds. Teleoconch starting with two spiral ribs. Lower rib becoming keel on second teleoconch whorl. On second and third teleoconch whorls, two secondary spiral ribs appearing. Spiral ribs crossed by weakly opisthocytic axial ribs (95–100 ribs per whorl). At intersections, blunt nodes appearing. Surface of teleoconch covered by spiral microornamentation. Porównanie The most similar to C. calloviensis Gründel, 1997 but the latter differs in the stable number of spiral ribs during ontogeny. From C. microstriata and C. squiresi differs in a much stronger spiral keel. C. kieli differs from C. saulae by the distinct nodes on the intersections of the axial and spiral ribs and the more sparsely distributed axial ribs. Autekologia Występowanie geograficzne Only in type locality. Zasięg czasowy Saynoceras verrucosum Zone, Late Valanginian (Early Cretaceous). Materiały muzealne Only one shell. Literatura Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183. |
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