10.5061/DRYAD.JSXKSN071
Stiles, Elena
0000-0002-3304-7580
University of Washington
Wilf, Peter
Pennsylvania State University
Iglesias, Ari
0000-0002-9098-8758
National Scientific and Technical Research Council
Gandolfo, María Alejandra
0000-0002-5430-1808
Cornell University
Cúneo, N. Rubén
Museum of Paleontology Egidio Feruglio
Data from Cretaceous-Paleogene plant extinction and recovery in Patagonia
Dryad
dataset
2020
Pennsylvania State University
https://ror.org/04p491231
Mid-American Paleontological Society (MAPS) Outstanding Research Award
Geological Society of America
https://ror.org/0029f7m05
12008-18
Pennsylvania State University
https://ror.org/04p491231
Paul D. Krynine
Pennsylvania State University
https://ror.org/04p491231
Charles E. Knopf, Sr., Memorial Scholarship
National Science Foundation
https://ror.org/021nxhr62
DEB-15556666 /1556136
National Science Foundation
https://ror.org/021nxhr62
EAR-1925755/1925552
National Science Foundation
https://ror.org/021nxhr62
DEB-0919071/0918932
National Science Foundation
https://ror.org/021nxhr62
DEB-0345750
2020-08-17T00:00:00Z
2020-08-17T00:00:00Z
en
https://doi.org/10.1038/s41559-016-0012
https://doi.org/10.1130/G23889A.1
173251 bytes
3
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
The Cretaceous-Paleogene (K/Pg) extinction appears to have been
geographically heterogeneous for some organismal groups. Southern
Hemisphere K/Pg palynological records have shown lower extinction and
faster recovery than in the Northern Hemisphere, but no comparable,
well-constrained Southern Hemisphere macrofloras spanning this interval
had been available. Here, macrofloral turnover patterns are addressed for
the first time in the Southern Hemisphere, using over 3,500 dicot leaves
from the latest Cretaceous (Maastrichtian) and the earliest Paleocene
(Danian) of Argentine Patagonia. A maximum ca. 90% macrofloral extinction
and ca. 45% drop in rarefied species richness is estimated across the
K/Pg, consistent with substantial species-level extinction and previously
observed extirpation of host-specialized leaf-mines. However, prior
palynological and taxonomic studies indicate low turnover of higher taxa
and persistence of general floral composition in the same sections. High
species extinction, decreased species richness, and homogenous Danian
macrofloras across time and facies resemble patterns often observed in
North America, but there are several notable differences. When compared
with boundary-spanning macrofloras at similar absolute paleolatitudes (ca.
50⁰S or N) from the Williston Basin (WB) in the Dakotas, both
Maastrichtian and Danian Patagonian species richness are higher, extending
a history of elevated South American diversity into the Maastrichtian.
Despite high species turnover, our analyses also reveal continuity and
expansion of leaf morphospace, including an increase in lobed and toothed
species unlike the Danian WB. Thus, both Patagonian and WB K/Pg
macrofloras support a significant extinction event, but they may also
reflect geographically heterogeneous diversity, extinction, and recovery
patterns warranting future study.
This dataset contains a full inventory of curated and morphotyped leaf
specimens studied in Stiles et al. 2020 (Paleobiology), currently located
at the Museo Paleontológico Egidio Feruglio, as well as character matrices
and results for cuantitative analyses. Danian specimens and morphotypes
largely correspond to those published by Iglesias et al (2007, Geology)
and Donovan et al. (2016, Nature Ecol Evo; 2018, Ameghiniana), with
revised Maastrichtian morphotypes (revised from Donovan et al. 2016;
2018). Supplementary Table 1. Taxonomically studied macrofloral elements
of the Maastrichtian Lefipán and Danian Salamanca and Peñas Coloradas
formations. Supplementary Table 2. Shared palyno-species among the
Maastrichtian (M) -Danian (D) strata of the Lefipán (Lef) Formation San
Ramón section and the Danian Salamanca (Sal) Palacio de los Loros and
Bosque Ormachea localities. Compiled from Barreda et al. (2012), Clyde et
al. (2014), and Barreda (pers. comm.). 1=present, 0=absent. Supplementary
Table 3. Inventory of observed specimens for Maastrichtian Lefipán and
Danian Salamanca and Peñas Coloradas formations and corresponding
localities, curated at the MEF. Specimens denoted using repository number
(MPEF-Pb) or unique field number as marked on specimen. Supplementary
Table 4. Maastrichtian (left) and Danian (right) dicot leaf morphotypes,
exemplar specimens as curated in the MEF, specimen counts per locality and
taxonomic affinity if available based on Iglesias et al. (2007; for Danian
morphotypes). New Danian morphotypes added by Donovan (2016) marked with
an *. Supplementary Table 5. Character states and corresponding
numerical code used to build morphological character matrix. Based on
Manual of Leaf Architechture (Ellis et al., 2009). "NA" = not
applicable. Supplementary Table 6. Morphological character matrix coded
for each Maastrichtian and Danian morphotype (see Supplementary Table 3)
based on characters listed in Supplementary Table 5 (C=character number).
"NA" = not applicable. Supplementary Table 7. Proportion of
missing character data (coded as NA in character matrix: Table S6) for
each character as percentage of all morphorypes, and per morphotype as
percentage of characters not preserved in the specimens analyzed. Reported
following recommendations by Gerber (2019). Supplementary Table 8.
Disparity measures calculated for representative assemblages of the
Lefipán (LEF localities), Salamanca (PL1 and PL2) and Peñas Coloradas (LF)
formations, and overall Maastrichtian and Danian floral assemblages.