新的早白垩世 Zonocypris G. W. Mller, 1898（甲壳纲：介形目）物种来自巴西的 Crato 组。

New Early Cretaceous species of Zonocypris G. W. Mller, 1898 (Crustacea: Ostracoda) from the Crato Formation, Brazil.

机构信息

Laboratrio de Micropaleontologia Aplicada/Laboratrio de Geologia Sedimentar (LMA/LAGESE), LITPEG, Universidade Federal de Pernambuco, Av. da Arquitetura, s/n, 50740-550, Recife, PE, Brazil. Universidade Federal de Pernambuco, Departamento de Geologia, Programa de Ps-Graduao em Geocincias, PPGEOC, Av. da Arquitetura, s/n, 50740-550, Recife, PE, Brazil. .

Laboratrio de Micropaleontologia Aplicada/Laboratrio de Geologia Sedimentar (LMA/LAGESE), LITPEG, Universidade Federal de Pernambuco, Av. da Arquitetura, s/n, 50740-550, Recife, PE, Brazil. .

出版信息

Zootaxa. 2022 May 31;5141(6):581-591. doi: 10.11646/zootaxa.5141.6.4.

DOI:10.11646/zootaxa.5141.6.4

PMID:36095772

Abstract

Two new species of Zonocypris G. W. Mller, 1898 are described from the late Aptian of the Araripe Basin, Northeast Brazil: Zonocypris berthoui sp. nov. and Zonocypris dorsoconvexa sp. nov. Species of this genus occur from the Early Cretaceous to the Holocene and are characterized by a small globular carapace, often ornamented over the whole surface by concentric ridges with simple normal pore canals, showing a remarkable morphological stability during the evolution of the genus. The first records of the genus point to an Atlantic origin. In Aptian deposits, species of Zonocypris are rare, occurring in brackish/freshwater assemblages, with marine influence.

摘要

两种新的圆腹鱲属鱼类（Zonocypris G. W. Mller, 1898）被描述于来自巴西东北部的阿雷格里盆地晚白垩世地层中：伯氏圆腹鱲（Zonocypris berthoui sp. nov.）和隆背圆腹鱲（Zonocypris dorsoconvexa sp. nov.）。该属鱼类最早出现于早白垩世，一直延续至今，其特点是具有球形的小甲壳，通常整个表面都有同心脊纹装饰，具有简单的正常孔道，在属的演化过程中表现出显著的形态稳定性。该属的第一个记录表明其起源于大西洋。在白垩纪阿普第阶的沉积中，圆腹鱲属的物种较为罕见，存在于半咸水/淡水组合中，受海洋影响。