Cochlioceras roemeri
Sugerowana cytacja: Moczyński 2019. Cochlioceras roemeri Dzik 1984. Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/viewrev/Species/Cochlioceras+roemeri)
 Cochlioceras roemeri Dzik, 1984; a reconstruction of the shell based on specimens from boulder E-252, Rozewie, Poland; b section through the siphuncle; d reconstruction of the shell based on specimens from boulder E-149, E. reclinatus Zone, Lasnamagian, Międzyzdroje, Poland; e section through the siphuncle, ZPAL N/016 boulder E-060, A. variabilis Zone, Kundan, Mochty, Poland; f reconstruction of a shell fragment, ZPAL N/001, erratic boulder of red limestone, Volkhovian?, Rozewie, Poland. Diagnoza Ventral siphuncle up to one third of the shell in diameter, filled with siphuncular deposits in its apical part in form of massive rod at ventral side, with flat rings at septal necks, cameral deposits well developed. Porównanie From other species of the genus differs in much wider siphuncle; from C. burchardi also in its siphuncle lying a little away from the shell wall and, consequently, in its straight septal suture. The presence of siphuncular and cameral deposits suggests proximity to the orthoceratids Autekologia Występowanie geograficzne Baltic region. Zasięg czasowy C. roemeri Dzik, 1984 occurs rather commonly in erratic boulders of the E. reclinatus Zone (Folkeslunda Limestone), but never in association with its coeval congener, C. burchardi; possibly also the E. reclinatus Zone of Estonia. One specimen was found in a boulder indistinguishable in lithology from those of the Paroistodus originalis Zone(untere rote Vaginatenkalk; Volkhovian). Materiały muzealne ZPAL Literatura Dzik, J. 1984a. Phylogeny of the Nautiloidea. Palaeontologia Polonica 45, 1-255 |
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