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Article ; Online: A global approach for natural history museum collections.

Johnson, Kirk R / Owens, Ian F P

2023 Volume 379, Issue 6638, Page(s) 1192–1194

Abstract: Integration of the world's natural history collections can provide a resource for decision-makers. ...

Abstract	Integration of the world's natural history collections can provide a resource for decision-makers.
MeSH term(s)	Museums ; Natural History ; Collections as Topic ; Decision Making
Language	English
Publishing date	2023-03-23
Publishing country	United States
Document type	Journal Article
ZDB-ID	128410-1
ISSN	1095-9203 ; 0036-8075
ISSN (online)	1095-9203
ISSN	0036-8075
DOI	10.1126/science.adf6434
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Article ; Online: Insect herbivory on Catula gettyi gen. et sp. nov. (Lauraceae) from the Kaiparowits Formation (Late Cretaceous, Utah, USA).

Maccracken, S Augusta / Miller, Ian M / Johnson, Kirk R / Sertich, Joseph M / Labandeira, Conrad C

PloS one

2022 Volume 17, Issue 1, Page(s) e0261397

Abstract: The Upper Cretaceous (Campanian Stage) Kaiparowits Formation of southern Utah, USA, preserves abundant plant, invertebrate, and vertebrate fossil taxa. Taken together, these fossils indicate that the ecosystems preserved in the Kaiparowits Formation were ...

Abstract	The Upper Cretaceous (Campanian Stage) Kaiparowits Formation of southern Utah, USA, preserves abundant plant, invertebrate, and vertebrate fossil taxa. Taken together, these fossils indicate that the ecosystems preserved in the Kaiparowits Formation were characterized by high biodiversity. Hundreds of vertebrate and invertebrate species and over 80 plant morphotypes are recognized from the formation, but insects and their associations with plants are largely undocumented. Here, we describe a new fossil leaf taxon, Catula gettyi gen et. sp. nov. in the family Lauraceae from the Kaiparowits Formation. Catula gettyi occurs at numerous localities in this deposit that represent ponded and distal floodplain environments. The type locality for C. gettyi has yielded 1,564 fossil leaf specimens of this species, which provides the opportunity to circumscribe this new plant species. By erecting this new genus and species, we are able to describe ecological associations on C. gettyi and place these interactions within a taxonomic context. We describe an extensive archive of feeding damage on C. gettyi caused by herbivorous insects, including more than 800 occurrences of insect damage belonging to five functional feeding groups indicating that insect-mediated damage on this taxon is both rich and abundant. Catula gettyi is one of the best-sampled host plant taxa from the Mesozoic Era, a poorly sampled time interval, and its insect damage is comparable to other Lauraceae taxa from the younger Late Cretaceous Hell Creek Flora of North Dakota, USA.
MeSH term(s)	Ecosystem
Language	English
Publishing date	2022-01-21
Publishing country	United States
Document type	Journal Article
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0261397
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Article ; Online: Correction: Insect herbivory on Catula gettyi gen. et sp. nov. (Lauraceae) from the Kaiparowits Formation (Late Cretaceous, Utah, USA).

Maccracken, S Augusta / Miller, Ian M / Johnson, Kirk R / Sertich, Joseph J W / Labandeira, Conrad C

PloS one

2022 Volume 17, Issue 8, Page(s) e0272757

Abstract: This corrects the article DOI: 10.1371/journal.pone.0261397.]. ...

Abstract	[This corrects the article DOI: 10.1371/journal.pone.0261397.].
Language	English
Publishing date	2022-08-03
Publishing country	United States
Document type	Published Erratum
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0272757
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Article: No Consistent Shift in Leaf Dry Mass per Area Across the Cretaceous-Paleogene Boundary.

Butrim, Matthew J / Royer, Dana L / Miller, Ian M / Dechesne, Marieke / Neu-Yagle, Nicole / Lyson, Tyler R / Johnson, Kirk R / Barclay, Richard S

Frontiers in plant science

2022 Volume 13, Page(s) 894690

Abstract: The Chicxulub bolide impact has been linked to a mass extinction of plants at the Cretaceous-Paleogene boundary (KPB; ∼66 Ma), but how this extinction affected plant ecological strategies remains understudied. Previous work in the Williston Basin, North ... ...

Abstract	The Chicxulub bolide impact has been linked to a mass extinction of plants at the Cretaceous-Paleogene boundary (KPB; ∼66 Ma), but how this extinction affected plant ecological strategies remains understudied. Previous work in the Williston Basin, North Dakota, indicates that plants pursuing strategies with a slow return-on-investment of nutrients abruptly vanished after the KPB, consistent with a hypothesis of selection against evergreen species during the globally cold and dark impact winter that followed the bolide impact. To test whether this was a widespread pattern we studied 1,303 fossil leaves from KPB-spanning sediments in the Denver Basin, Colorado. We used the relationship between petiole width and leaf mass to estimate leaf dry mass per area (LMA), a leaf functional trait negatively correlated with rate of return-on-investment. We found no evidence for a shift in this leaf-economic trait across the KPB: LMA remained consistent in both its median and overall distribution from approximately 67 to 65 Ma. However, we did find spatio-temporal patterns in LMA, where fossil localities with low LMA occurred more frequently near the western margin of the basin. These western margin localities are proximal to the Colorado Front Range of the Rocky Mountains, where an orographically driven high precipitation regime is thought to have developed during the early Paleocene. Among these western Denver Basin localities, LMA and estimated mean annual precipitation were inversely correlated, a pattern consistent with observations of both fossil and extant plants. In the Denver Basin, local environmental conditions over time appeared to play a larger role in determining viable leaf-economic strategies than any potential global signal associated with the Chicxulub bolide impact.
Language	English
Publishing date	2022-06-16
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2613694-6
ISSN	1664-462X
ISSN	1664-462X
DOI	10.3389/fpls.2022.894690
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Article ; Online: Palaeobotany: forests frozen in time.

Johnson, Kirk R

Nature

2007 Volume 447, Issue 7146, Page(s) 786–787

MeSH term(s)	Climate ; Disasters ; Ecosystem ; Fossils ; History, Ancient ; Illinois ; Time Factors ; Trees/physiology
Language	English
Publishing date	2007-06-14
Publishing country	England
Document type	Historical Article ; News
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/447786a
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Article ; Online: First cycad seedling foliage from the fossil record and inferences for the Cenozoic evolution of cycads.

Erdei, Boglárka / Coiro, Mario / Miller, Ian / Johnson, Kirk R / Griffith, M Patrick / Murphy, Vickie

Biology letters

2019 Volume 15, Issue 7, Page(s) 20190114

Abstract: The morphology of the early ontogenetic stages of cycad foliage may help resolve the relationships between extinct to extant cycad lineages. However, prior to this study, fossil evidence of cycad seedlings was not known. We describe a compression fossil ... ...

Abstract	The morphology of the early ontogenetic stages of cycad foliage may help resolve the relationships between extinct to extant cycad lineages. However, prior to this study, fossil evidence of cycad seedlings was not known. We describe a compression fossil of cycad eophylls with co-occurring fully developed leaves of adult specimens from the early Palaeocene ( ca 63.8 Ma) Castle Rock flora from the Denver Basin, CO, USA and assign it to the fossil genus Dioonopsis (Cycadales) based on leaf morphology and anatomy. The new fossil seedling foliage is particularly important because fully differentiated pinnate leaves of adult plants and the eophylls belong to the same species based on shared epidermal micromorphology, therefore, increasing the number of morphological characteristics that can be used to place Dioonopsis phylogenetically. Significantly, the seedling fossil has a basic foliage structure that is very similar to seedlings of extant cycads, which is consistent with a cycadalean affinity of Dioonopsis. Nevertheless, the set of morphological characters in the seedling and adult specimens of Dioonopsis suggests a distant relationship between Dioonopsis and extant Dioon. This indicates that extinct lineages of cycads were present and widespread during the early Cenozoic (Palaeogene) coupled with the subordinate role of extant genera in the Palaeogene fossil record of cycads.
MeSH term(s)	Cycadopsida ; Fossils ; Phylogeny ; Plant Leaves ; Seedlings
Language	English
Publishing date	2019-07-10
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	2135022-X
ISSN	1744-957X ; 1744-9561
ISSN (online)	1744-957X
ISSN	1744-9561
DOI	10.1098/rsbl.2019.0114
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Article ; Online: Nitrogen isotopes reveal independent origins of N

Kipp, Michael A / Stüeken, Eva E / Strömberg, Caroline A E / Brightly, William H / Arbour, Victoria M / Erdei, Boglárka / Hill, Robert S / Johnson, Kirk R / Kvaček, Jiří / McElwain, Jennifer C / Miller, Ian M / Slodownik, Miriam / Vajda, Vivi / Buick, Roger

Nature ecology & evolution

2023 Volume 8, Issue 1, Page(s) 57–69

Abstract: Cycads are ancient seed plants (gymnosperms) that emerged by the early Permian. Although they were common understory flora and food for dinosaurs in the Mesozoic, their abundance declined markedly in the Cenozoic. Extant cycads persist in restricted ... ...

Abstract	Cycads are ancient seed plants (gymnosperms) that emerged by the early Permian. Although they were common understory flora and food for dinosaurs in the Mesozoic, their abundance declined markedly in the Cenozoic. Extant cycads persist in restricted populations in tropical and subtropical habitats and, with their conserved morphology, are often called 'living fossils.' All surviving taxa receive nitrogen from symbiotic N
MeSH term(s)	Nitrogen Isotopes ; Symbiosis ; Cycadopsida ; Nitrogen ; Fossils ; Cyanobacteria
Chemical Substances	Nitrogen Isotopes ; Nitrogen (N762921K75)
Language	English
Publishing date	2023-11-16
Publishing country	England
Document type	Journal Article
ISSN	2397-334X
ISSN (online)	2397-334X
DOI	10.1038/s41559-023-02251-1
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Article ; Online: Opinion: Specimen collections should have a much bigger role in infectious disease research and response.

DiEuliis, Diane / Johnson, Kirk R / Morse, Stephen S / Schindel, David E

Proceedings of the National Academy of Sciences of the United States of America

2016 Volume 113, Issue 1, Page(s) 4–7

MeSH term(s)	Animals ; Communicable Disease Control ; Communicable Diseases/microbiology ; Communicable Diseases/parasitology ; Communicable Diseases/transmission ; Disease Outbreaks/prevention & control ; Humans ; Public Health ; Specimen Handling
Language	English
Publishing date	2016-01-05
Publishing country	United States
Document type	Journal Article
ZDB-ID	209104-5
ISSN	1091-6490 ; 0027-8424
ISSN (online)	1091-6490
ISSN	0027-8424
DOI	10.1073/pnas.1522680112
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Article: An image dataset of cleared, x-rayed, and fossil leaves vetted to plant family for human and machine learning.

Wilf, Peter / Wing, Scott L / Meyer, Herbert W / Rose, Jacob A / Saha, Rohit / Serre, Thomas / Cúneo, N Rubén / Donovan, Michael P / Erwin, Diane M / Gandolfo, María A / González-Akre, Erika / Herrera, Fabiany / Hu, Shusheng / Iglesias, Ari / Johnson, Kirk R / Karim, Talia S / Zou, Xiaoyu

PhytoKeys

2021 Volume 187, Page(s) 93–128

Abstract: Leaves are the most abundant and visible plant organ, both in the modern world and the fossil record. Identifying foliage to the correct plant family based on leaf architecture is a fundamental botanical skill that is also critical for isolated fossil ... ...

Abstract	Leaves are the most abundant and visible plant organ, both in the modern world and the fossil record. Identifying foliage to the correct plant family based on leaf architecture is a fundamental botanical skill that is also critical for isolated fossil leaves, which often, especially in the Cenozoic, represent extinct genera and species from extant families. Resources focused on leaf identification are remarkably scarce; however, the situation has improved due to the recent proliferation of digitized herbarium material, live-plant identification applications, and online collections of cleared and fossil leaf images. Nevertheless, the need remains for a specialized image dataset for comparative leaf architecture. We address this gap by assembling an open-access database of 30,252 images of vouchered leaf specimens vetted to family level, primarily of angiosperms, including 26,176 images of cleared and x-rayed leaves representing 354 families and 4,076 of fossil leaves from 48 families. The images maintain original resolution, have user-friendly filenames, and are vetted using APG and modern paleobotanical standards. The cleared and x-rayed leaves include the Jack A. Wolfe and Leo J. Hickey contributions to the National Cleared Leaf Collection and a collection of high-resolution scanned x-ray negatives, housed in the Division of Paleobotany, Department of Paleobiology, Smithsonian National Museum of Natural History, Washington D.C.; and the Daniel I. Axelrod Cleared Leaf Collection, housed at the University of California Museum of Paleontology, Berkeley. The fossil images include a sampling of Late Cretaceous to Eocene paleobotanical sites from the Western Hemisphere held at numerous institutions, especially from Florissant Fossil Beds National Monument (late Eocene, Colorado), as well as several other localities from the Late Cretaceous to Eocene of the Western USA and the early Paleogene of Colombia and southern Argentina. The dataset facilitates new research and education opportunities in paleobotany, comparative leaf architecture, systematics, and machine learning.
Language	English
Publishing date	2021-12-16
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2579891-1
ISSN	1314-2003 ; 1314-2011
ISSN (online)	1314-2003
ISSN	1314-2011
DOI	10.3897/phytokeys.187.72350
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Article: An image dataset of cleared, x-rayed, and fossil leaves vetted to plant family for human and machine learning

Wilf, Peter / Wing, Scott L. / Meyer, Herbert W. / Rose, Jacob A. / Saha, Rohit / Serre, Thomas / Cúneo, N. Rubén / Donovan, Michael P. / Erwin, Diane M. / Gandolfo, María A. / González-Akre, Erika / Herrera, Fabiany / Hu, Shusheng / Iglesias, Ari / Johnson, Kirk R. / Karim, Talia S. / Zou, Xiaoyu

PhytoKeys. 2021 Dec. 16, v. 187

2021

Abstract: AbstractLeaves are the most abundant and visible plant organ, both in the modern world and the fossil record. Identifying foliage to the correct plant family based on leaf architecture is a fundamental botanical skill that is also critical for isolated ... ...

Abstract	AbstractLeaves are the most abundant and visible plant organ, both in the modern world and the fossil record. Identifying foliage to the correct plant family based on leaf architecture is a fundamental botanical skill that is also critical for isolated fossil leaves, which often, especially in the Cenozoic, represent extinct genera and species from extant families. Resources focused on leaf identification are remarkably scarce; however, the situation has improved due to the recent proliferation of digitized herbarium material, live-plant identification applications, and online collections of cleared and fossil leaf images. Nevertheless, the need remains for a specialized image dataset for comparative leaf architecture. We address this gap by assembling an open-access database of 30,252 images of vouchered leaf specimens vetted to family level, primarily of angiosperms, including 26,176 images of cleared and x-rayed leaves representing 354 families and 4,076 of fossil leaves from 48 families. The images maintain original resolution, have user-friendly filenames, and are vetted using APG and modern paleobotanical standards. The cleared and x-rayed leaves include the Jack A. Wolfe and Leo J. Hickey contributions to the National Cleared Leaf Collection and a collection of high-resolution scanned x-ray negatives, housed in the Division of Paleobotany, Department of Paleobiology, Smithsonian National Museum of Natural History, Washington D.C.; and the Daniel I. Axelrod Cleared Leaf Collection, housed at the University of California Museum of Paleontology, Berkeley. The fossil images include a sampling of Late Cretaceous to Eocene paleobotanical sites from the Western Hemisphere held at numerous institutions, especially from Florissant Fossil Beds National Monument (late Eocene, Colorado), as well as several other localities from the Late Cretaceous to Eocene of the Western USA and the early Paleogene of Colombia and southern Argentina. The dataset facilitates new research and education opportunities in paleobotany, comparative leaf architecture, systematics, and machine learning.
Keywords	Eocene epoch ; Late Cretaceous epoch ; X-radiation ; data collection ; databases ; education ; fossils ; herbaria ; humans ; leaves ; museums ; national monuments ; paleobotany ; Argentina ; California ; Colombia ; Colorado
Language	English
Dates of publication	2021-1216
Size	p. 93-128.
Publishing place	Pensoft Publishers
Document type	Article
ZDB-ID	2579891-1
ISSN	1314-2003 ; 1314-2011
ISSN (online)	1314-2003
ISSN	1314-2011
DOI	10.3897/phytokeys.187.72350
Database	NAL-Catalogue (AGRICOLA)

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