A tardigrade in Dominican amber.

Published on Oct 13, 2021in Proceedings of The Royal Society B: Biological Sciences5.349
· DOI :10.1098/RSPB.2021.1760
Marc A. Mapalo3
Estimated H-index: 3
(Harvard University),
Ninon Robin (Royal Belgian Institute of Natural Sciences)+ 2 AuthorsPhillip Barden9
Estimated H-index: 9
(AMNH: American Museum of Natural History)
Tardigrades are a diverse group of charismatic microscopic invertebrates that are best known for their ability to survive extreme conditions. Despite their long evolutionary history and global distribution in both aquatic and terrestrial environments, the tardigrade fossil record is exceedingly sparse. Molecular clocks estimate that tardigrades diverged from other panarthropod lineages before the Cambrian, but only two definitive crown-group representatives have been described to date, both from Cretaceous fossil deposits in North America. Here, we report a third fossil tardigrade from Miocene age Dominican amber. Paradoryphoribius chronocaribbeus gen. et sp. nov. is the first unambiguous fossil representative of the diverse superfamily Isohypsibioidea, as well as the first tardigrade fossil described from the Cenozoic. We propose that the patchy tardigrade fossil record can be explained by the preferential preservation of these microinvertebrates as amber inclusions, coupled with the scarcity of fossiliferous amber deposits before the Cretaceous.
#1Anna F. Whitaker (U of T: University of Toronto)H-Index: 2
#2Julien Kimmig (PSU: Pennsylvania State University)H-Index: 8
#1Witold Morek (Jagiellonian University)H-Index: 14
#2Joanna A. Ciosek (Jagiellonian University)H-Index: 1
Last. Łukasz Michalczyk (Jagiellonian University)H-Index: 30
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Abstract Tardigrades constitute a phylum of cosmopolitan, microscopic invertebrates, capable of withstanding harsh environmental conditions thanks to cryptobiosis. These tiny animals are taxonomically challenging due to the limited number of meaningful morphological traits and morphological stasis. One of the most extreme examples is the order Apochela, in which the morphology is even more simplified and conserved than in the majority of other tardigrades. Despite this, apochelans are currently ...
#1Piotr Gąsiorek (Jagiellonian University)H-Index: 15
#2Łukasz Michalczyk (Jagiellonian University)H-Index: 30
#1Daniel E. Perez-Gelabert (National Museum of Natural History)H-Index: 10
An updated and extensively revised checklist of the arthropods of Hispaniola (Dominican Republic and Haiti) is presented 11 years after the publication of the original in 2008. It integrates and quantifies all the terrestrial and surrounding marine arthropod species (plus those of Tardigrada and Onychophora), reported in the zoological literature for Hispaniola through the middle of 2019. A total of 9,920 valid species (8,202 extant and 1,718 fossil) are listed, which represents an increase of 1...
#1Sarah C. Crews (California Academy of Sciences)H-Index: 11
#2Lauren A. Esposito (California Academy of Sciences)H-Index: 10
Background The immense geologic and ecological complexity of the Caribbean has created a natural laboratory for interpreting when and how organisms disperse through time and space. However, competing hypotheses compounded with this complexity have resulted in a lack of unifying principles of biogeography for the region. Though new data concerning the timing of geologic events and dispersal events are emerging, powerful new analytical tools now allow for explicit hypothesis testing. Arthropods, w...
#1Piotr GąsiorekH-Index: 15
#2Daniel StecH-Index: 18
Last. Łukasz MichalczykH-Index: 30
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#1Vladimir Gross (University of Kassel)H-Index: 9
#2Sandra Treffkorn (University of Kassel)H-Index: 4
Last. Georg Mayer (University of Kassel)H-Index: 30
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Abstract Tardigrades form a monophyletic group of microscopic ecdysozoans best known for surviving extreme environmental conditions. Due to their key phylogenetic position as a subgroup of the Panarthropoda, understanding tardigrade biology is important for comparative studies with related groups like Arthropoda. Panarthropods — and Ecdysozoa as a whole — likely evolved from macroscopic ancestors, with several taxa becoming secondarily miniaturized. Morphological and genomic evidence likewise po...
#1Noemí Guil (CSIC: Spanish National Research Council)H-Index: 13
#2Aslak Jørgensen (UCPH: University of Copenhagen)H-Index: 25
Last. Reinhardt Møbjerg Kristensen (Wild Center)H-Index: 40
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JAE/DOC Program, Grant/Award Number: JAE-DOC 2009-2012; European Marie Curie, Grant/Award Number: FP7-PEOPLE-2010-RG and PERG07-GA-2010-268289 ; Consejo Superior de Investigaciones Cientificas; FP7
#1Leyla J. Seyfullah (GAU: University of Göttingen)H-Index: 14
#2Christina Beimforde (GAU: University of Göttingen)H-Index: 9
Last. Alexander R. Schmidt (GAU: University of Göttingen)H-Index: 28
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Amber is fossilised plant resin. It can be used to provide insights into the terrestrial conditions at the time the original resin was exuded. Amber research thus can inform many aspects of palaeontology, from the recovery and description of enclosed fossil organisms (biological inclusions) to attempts at reconstruction of past climates and environments. Here we focus on the resin itself, the conditions under which it may have been exuded, and its potential path to fossilisation, rather than on ...
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