Tuba seriaformis (Schröder, 1995)
Sugerowana cytacja: Gryz, P. 2020. Tuba seriaformis (Schröder, 1995) . Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/view/Species/Tuba+seriaformis)
 Specimen ZPAL Ga.9/235 from the Valanginian (Early Cretaceous) of Wąwał in lateral and apical view. Diagnoza Teleoconch broadly cone-shaped with bulging whorls, 1.43 times as high as broad. Protoconch coaxial, smooth. Teleoconch starting with 3–4 spiral ribs and densely packed orthocline axial ribs. Number of spiral ribs increasing during ontogeny. Surface of teleoconch covered by spiral microornamentation. Porównanie The similar Campanian Tuba mississippiensis (Dockery, 1993) differs in having a higher number of primary spiral ribs, of which three become more prominent than the others during further growth. Autekologia Występowanie geograficzne Only in type locality. Zasięg czasowy Valanginian (Early Cretaceous). Materiały muzealne Only 144 shells. Literatura Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183. Schröder, M.1995. Frühontogenetische Schalen jurassicher und unterkretazischer Gastropoden aus Norddeutschland und Polen. Palaeontographica, Abteilung A 238, 1–95. |
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