MORPHOSTATISTICAL ANALYSIS OF MAASTRICHTIAN POPULATIONS OF GUEMBELITRIA FROM EL KEF, TUNISIA

被引：10

作者：

Arz, Jose A. ^{[1
,2
]}

Arenillas, Ignacio ^{[1
,2
]}

Nanez, Carolina ^{[3
,4
]}

机构：

[1] Univ Zaragoza, Dept Ciencias Tierra Paleontol, E-50009 Zaragoza, Spain

[2] Univ Zaragoza, Inst Univ Invest Ciencias Ambientales Aragon, E-50009 Zaragoza, Spain

[3] Serv Geol Minero Argentino, Buenos Aires, DF, Argentina

[4] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina

来源：

JOURNAL OF FORAMINIFERAL RESEARCH | 2010年 / 40卷 / 02期

关键词：

CATASTROPHIC MASS EXTINCTION; CRETACEOUS/PALEOGENE K/P BOUNDARY; PLANKTIC FORAMINIFERA; CRYPTIC SPECIATION; MOLECULAR EVIDENCE; AIN-SETTARA; PALEOCENE; TRISERIAL; BIOSTRATIGRAPHY; PHYLOGENY;

D O I：

10.2113/gsjfr.40.2.148

中图分类号：

Q91 [古生物学];

学科分类号：

0709 ; 070903 ;

摘要：

Three species of Guembelitria with regular triserial arrangement are recognized in the late Maastrichtian, based on biometric measures of specimens from El Kef (Tunisia) and morphostatistical analysis. They are mainly recognized based on their test height and rate of increase in size of the chambers. Guembelitria blowi, nov. sp. is proposed for the short-spired morphotypes that were previously ascribed to Guembelitria trifolia. Guembelitria cretacea Cushman, 1933, is restricted to medium-spired morphotypes, and Guembelitria dammula Voloshina, 1961, to high-spired morphotypes. The three morphospecies have a papillate test surface, usually with pore-mounds, but some specimens exhibit imperforate papillae. The origin of this variability in the guembelitrid test surface might be linked to ecophenotypy or ontogeny, but the presence of cryptic species cannot be ruled out.

引用

页码：148 / 164

页数：17

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