Revision of Ostrea (Gigantostrea) gigantica Solander var. oligoplana Sacco and Ostrea (Ostrea) isseli Rovereto (Oligocene, Tertiary Piedmont Basin, NW Italy)

IF 1.5 4区地球科学 Q2 GEOLOGY Carnets De Geologie Pub Date : 2021-02-24 DOI:10.2110/CARNETS.2021.2103

M. Bonci, D. Dagnino, A. Mandarino, A. Mazzini, M. Piazza

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Abstract

The aim of this paper is the revision and redocumentation of Ostrea (Gigantostrea) gigantica Solander var. oligoplana Sacco, 1897, Ostrea (Ostrea) isseli n. denom. Rovereto, 1897, and Ostrea (Ostrea) isseli n. denom. var. elongata Rovereto, 1897. These taxa are from the Oligocene strata of the Molare Formation (Tertiary Piedmont Basin, southern Piedmont - central Liguria, NW Italy). The syntypes of O. (G.) gigantica var. oligoplana are in the "Collezione Bellardi e Sacco", at the Museo Regionale di Scienze Naturali di Torino; the syntypes of O. (O.) isseli and O. (O.) isseli var. elongata are in the "Collezione BTP" (BTP Collection, at the Dipartimento di Scienze della Terra, dell'Ambiente e della Vita - DISTAV - of the Università di Genova). The var. oligoplana is here moved to the species rank and allocated to the genus Pycnodonte Fischer von Waldheim, 1835. O. (O.) isseli and O. (O.) isseli var. elongata are recognized as junior synonyms of the Sacco's taxon. Rovereto (1897) compared his new species with Ostrea subgigantea Raulin & Delbos, 1855, a poorly known taxon, that is here figured for the first time and shown to represent a species different from P. oligoplana (Sacco, 1897).

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Ostrea (Gigantostrea) gigantica Solander var. oligoplana Sacco和Ostrea (Ostrea) isseli Rovereto(渐新世)的修正(意大利西北部第三纪山前盆地)

这篇论文的目的是对Ostrea (Gigantostrea)的修订和记录。罗弗里托，1897年，还有奥斯特里亚。1897年，var elongata Rovereto。这些税来自臼齿形成的上新世层。O. (G.) gi古董var.寡头plana在都灵区域自然科学博物馆的“贝拉迪和萨科收藏”中;热那亚大学地球、环境和生命科学系的BTP系列。1835年，Pycnodonte Fischer von Waldheim属。伊斯塞利和伊斯塞里瓦。Rovereto(1897)将他的新物种与鲜为人知的taxon进行了比较，这是第一次出现，并被证明与P.寡头统治物种不同(很多，1897)。

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