PALEOECOLOGICAL CHARACTERIZATION OF OSTRACODS IN BEACHROCKS FROM THE NORTHERN SECTOR OF THE RIO GRANDE DO SUL COASTAL PLAIN, BRAZIL

被引:2
作者
Bergue, Cristianini Trescastro [1 ]
Lopes, Renato Pereira [2 ]
Caron, Felipe [1 ]
Ritter, Matias do Nascimento [1 ]
Rodrigues, Fabio Lameiro [1 ]
机构
[1] Univ Fed Rio Grande do Sul, Ctr Estudos Costeiros Limnol & Marinhos, Dept Interdisciplinar, Ave Tramandai 976, BR-95625000 Imbe, RS, Brazil
[2] Ave Rio Grande 45,Caixa Postal 15, BR-96207000 Rio Grande, RS, Brazil
来源
REVISTA BRASILEIRA DE PALEONTOLOGIA | 2022年 / 25卷 / 04期
关键词
Pelotas Basin; Quaternary; coastal environments; micropaleontology; taphonomy; FOSSOCYTHERIDEA SWAIN; CRUSTACEA OSTRACODA; SOUTHERN BRAZIL; MARINE; EVOLUTION; HOLOCENE; BARRIER; BASIN; FORAMINIFERA; QUATERNARY;
D O I
10.4072/rbp.2022.4.04
中图分类号
Q91 [古生物学];
学科分类号
0709 ; 070903 ;
摘要
A micropaleontological analysis on 15 beachrock samples from the Northern sector of Rio Grande do Sul Coastal Plain (RSCP), southern Brazil, revealed a relatively diverse and well-preserved ostracod assemblage composed of 16 species, including Cyprideis multidentata Hartmann, Callistocythere nucleoperiscum Whatley et al., Cytheretta punctata Sanguinetti, Caudites ohmerti Coimbra & Ornellas , and Argenticytheretta levipunctata Sanguinetti et al. Eleven ostracod species are left in open nomenclature or tentatively identified. Besides ostracods, some foraminifers, echinoderm spines, and fish remains (teeth) were also recovered; however, the scarcity of specimens or poor preservation precluded identification at species level. Based on the Ostracoda taxonomic composition it is proposed that the beachrocks characterize environmentally condensed assemblages. This preliminary study reveals the importance and potentiality of micropaleontology for understanding the processes involved in the formation of beachrocks.
引用
收藏
页码:292 / 302
页数:11
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