Cosmocerithium antiquum
Sugerowana cytacja: Gryz, P. 2020. Cosmocerithium antiquum (Gründel, 2001) . Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/viewrev/Species/Cosmocerithium+antiquum)
 Diagnoza Shell elongate, 4.9 times as high as broad. First half of protoconch 2 whorl ornamented exclusively with pustules. Afterwards three spiral ribs appearing. Axial ribs appearing on second whorl of protoconch 2. Adapicalmost spiral rib disappearing on third whorl. Abapical ribs becoming keel-like. Axial ribs weakly opisthocyrtic. Teleoconch ornamented with net of spiral and axial ribs pointed at intersections. Number of spiral ribs ranging from four at first teleoconch whorl to eight at sixth. Number of axial ribs increasing from 18 to 26 per whorl. Porównanie Autekologia Występowanie geograficzne Germany and Gnaszyn in Poland Zasięg czasowy Bathonian Materiały muzealne Material from Germany and over 100 shells from Poland (ZPAL). Literatura Gründel, J. 2001. Nerithimorpha und weitere Caenogastropoda (Gastropoda) aus dem Dogger Norddeutschlands und des nordwestlischen Polens. Berliner Geowissenschaftliche Abhandlungen, Reihe E36, 45–99. Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183. |
|
