10.5061/DRYAD.12JM63XVJ
Cole, Selina
0000-0001-6432-8994
American Museum of Natural History
Ausich, William
The Ohio State University
Wilson, Mark
College of Wooster
A Hirnantian holdover from the late Ordovician mass extinction: phylogeny
and biogeography of a new Anthracocrinid crinoid from Estonia
Dryad
dataset
2020
Crinoidea
Camerata
National Geographic Society
https://ror.org/04bqh5m06
NGS 60031112
American Museum of Natural History
https://ror.org/03thb3e06
2020-07-06T00:00:00Z
2020-07-06T00:00:00Z
en
https://doi.org/10.1002/spp2.1345
309787 bytes
5
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Relatively few Hirnantian (Late Ordovician) crinoids are known, and none
have been previously described from the palaeocontinent of Baltica. This
has impaired our ability to understand patterns of extinction and
biogeographic dispersal surrounding the Late Ordovician mass extinction,
which triggered a major turnover in crinoid faunas. Here, we describe
Tallinnicrinus toomae gen. et sp. nov., an anthracocrinid diplobathrid
from the Hirnantian of northern Estonia. Tallinnicrinus is the youngest
member of the Anthracocrinidae and the first representative of the family
to occur in Baltica. Morphologically, Tallinnicrinus is unusual in that
the radial and basal plates are in a single circlet of ten plates, similar
to the anthracocrinid Rheocrinus Haugh, 1979 from the Katian of Laurentia.
Phylogenetic analysis further confirms a close relationship between
Tallinnicrinus and Laurentian anthracocrinids, suggesting biogeographic
dispersal of the lineage from Laurentia to Baltica during the late Katian
or early Hirnantian. The occurrence of this new taxon establishes that the
family Anthracocrinidae survived the first pulse of the Late Ordovician
mass extinction. However, the lineage remained a “dead clade walking” as
it failed to diversify in the wake of the end-Katian extinction and
ultimately went extinct itself by the end of the Ordovician.
This dataset includes the character matrices and scripts to reproduce the
phylogenetic analyses presented in the paper, including both the the
parsimony analysis in PAUP* v4.0a167 (Parsimony_analysis.nex) and the
Bayesian analysis in Mr. Bayes v3.2.6 (Bayesian_analysis.nex). Results
from the phylogenetic analyses are included as nexus files for both the
parsimony analysis (Parsimony_results.nex, which includes the 2
most-parsimonious trees recovered) and the Bayesian analysis
(Bayesian_results.nex, which includes the maximum clade credibility and
50% majority rule trees). All .nex files can be opened with standard text
editor programs. The Supplemental_Materials.pdf file includes descriptions
of data files and figures showing the Bayesian maximum clade credibility
tree and the 50% majority rule tree.