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Gap in the tetrapod fossil record
Romer's gap is an apparent gap in the Paleozoic tetrapod fossil record noted in the studies of paleontology and evolutionary biology, which represent periods
Romer's_gap
American paleontologist
years." Romer was the first to recognise the gap in the fossil record between the tetrapods of the Devonian and the later Carboniferous period, a gap that
Alfred_Romer
Topics referred to by the same term
with civil rights and state laws Romer's gap in the record of vertebrate fossils c. 360–340 million years ago Romer Shoal Light, a lighthouse off the
Romer
Fifth period of the Paleozoic Era
Laurin, Michel; Berner, Robert A. (November 7, 2006). "Confirmation of Romer's Gap is a low oxygen interval constraining the timing of initial arthropod
Carboniferous
Paraphyletic group of tetrapodomorphs
event, followed by a gap in the fossil record of some 15 million years at the start of the Carboniferous, called "Romer's gap". The gap marks the disappearance
Labyrinthodontia
Gap in evolutionary biology
evolutionary biology. The fossil gap occurs in the early Carboniferous, coinciding and extending past the Romer's gap for tetrapod vertebrates, who were
Arthropod_gap
Second subperiod of the Carboniferous
Carboniferous Rainforest Collapse ← Mazon Creek Fossils ← End of Romer's Gap ← Beginning of Romer's Gap Subdivision of the Carboniferous according to the ICS, as
Pennsylvanian_(geology)
First stage of the Carboniferous
variabilis the zone of Patrognathus crassus The Tournaisian coincides with Romer's gap, a period of remarkably few terrestrial fossils, thus constituting a
Tournaisian
Extinct genus of tetrapods
Pederpes is an important fossil because it comes from the period known as Romer's gap and provides biologists with rare information about the development of
Pederpes
Extinct family of tetrapodomorphs
imply that a very long ghost lineage of whatcheeriids lived through Romer's gap, a period during the Early Carboniferous conspicuously lacking in tetrapod
Whatcheeriidae
Second stage of the Carboniferous
Carboniferous Rainforest Collapse ← Mazon Creek Fossils ← End of Romer's Gap ← Beginning of Romer's Gap Subdivision of the Carboniferous according to the ICS, as
Viséan
First subperiod of the Carboniferous Period
Carboniferous Rainforest Collapse ← Mazon Creek Fossils ← End of Romer's Gap ← Beginning of Romer's Gap Subdivision of the Carboniferous according to the ICS, as
Mississippian_(geology)
Extinct genus of tetrapodomorphs
the term "missing link", implying that Tiktaalik filled an evolutionary gap between fish and tetrapods. Nevertheless, Tiktaalik has never been claimed
Tiktaalik
Mass extinction at the end of the Devonian
successors in the Early Carboniferous. This fossil hiatus, known as "Romer's Gap", has been linked to the Hangenberg Event. However, recent and continued
Hangenberg_event
Seventh and final stage of the Carboniferous
Carboniferous Rainforest Collapse ← Mazon Creek Fossils ← End of Romer's Gap ← Beginning of Romer's Gap Subdivision of the Carboniferous according to the ICS, as
Gzhelian
English paleontologist and biologist (1947–2020)
Coates (University of Chicago), Clack defined what is known as "Romer's Gap", a major gap in the fossil record of early tetrapods and one that she subsequently
Jenny_Clack
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Gaiasia
Third stage of the Carboniferous
Carboniferous Rainforest Collapse ← Mazon Creek Fossils ← End of Romer's Gap ← Beginning of Romer's Gap Subdivision of the Carboniferous according to the ICS, as
Serpukhovian
Extinct species of arthropod
occurs in the early Carboniferous, coinciding and extending past the Romer's gap for tetrapods, which may have been caused by low oxygen levels in the
Strudiella
Geological formation in Scotland
"Earliest Carboniferous tetrapod and arthropod faunas from Scotland populate Romer's Gap". Proceedings of the National Academy of Sciences. 109 (12): 4532–4537
Ballagan_Formation
Fifth stage of the Carboniferous
Carboniferous Rainforest Collapse ← Mazon Creek Fossils ← End of Romer's Gap ← Beginning of Romer's Gap Subdivision of the Carboniferous according to the ICS, as
Moscovian_age
Extinct order of tetrapods
Retrieved 2012-05-26. Clack, J. A. (July 2002). "An early tetrapod from 'Romer's Gap'". Nature. 418 (6893): 72–76. doi:10.1038/nature00824. ISSN 0028-0836
Embolomeri
State of having more than five digits in ancient fish and tetrapods
tetrapods survived to the Carboniferous. Crassigyrinus, from the fossil-poor Romer's gap in the early Carboniferous, is usually thought to have had five digits
Polydactyly_in_stem-tetrapods
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Acanthostega
Fourth stage of the Carboniferous
Carboniferous Rainforest Collapse ← Mazon Creek Fossils ← End of Romer's Gap ← Beginning of Romer's Gap Subdivision of the Carboniferous according to the ICS, as
Bashkirian
Genus of early tetrapod
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Tanyka
Extinct order of amphibians
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Aistopoda
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Caerorhachis
Extinct family of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Colosteidae
Scientific study of prehistoric vertebrates
thus becoming the first terrestrial vertebrates, the stegocephalians. Romer's gap in the early Carboniferous period (359 to 299 Ma) left little of the
Vertebrate_paleontology
Sixth stage of the Carboniferous
Carboniferous Rainforest Collapse ← Mazon Creek Fossils ← End of Romer's Gap ← Beginning of Romer's Gap Subdivision of the Carboniferous according to the ICS, as
Kasimovian
Coastline in Nova Scotia, Canada
Blue Beach is the type locality for the apparent gap in the tetrapod fossil record known as Romer's gap. Sir William Logan, the first Director of the Geological
Blue_Beach
Scottish fossil hunter
attention on early Carboniferous palaeobiology as the means to closing Romer's gap. Born Stanley Wood in Edinburgh, 1939, Wood left school aged 14 to work
Stan_Wood_(fossil_hunter)
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Ichthyostega
Extinct genus of tetrapodomorphs
to Pteroplax cornuta or Eogyrinus attheyi) and an isolated jugal bone. Romer (1963) showed that the tooth of an animal that J. S. Newberry named "Rhizodus
Anthracosaurus
Extinct order of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Rhizodontida
Extinct family of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Gephyrostegidae
Clade of reptile-like animals
subsequently added Seymouriamorpha to his Reptiliomorpha as well. Alfred Sherwood Romer rejected Säve-Söderbergh's theory of a biphyletic amphibia and used the
Reptiliomorpha
Species of tetrapodomorph (fossil)
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Casineria
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Qikiqtania
Evolution of four legged vertebrates and their derivatives
recognizable mid-Carboniferous amphibian lineages. It was referred to as "Romer's Gap", which now covers the period from about 360 to 345 million years ago
Evolution_of_tetrapods
Paleontological discovery in Poland
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Zachelmie_trackways
Clade of vertebrates
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Tetrapodomorpha
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Elpistostege
Extinct order of amphibians
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Nectridea
Extinct family of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Baphetidae
Clade of amphibians
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Batrachomorpha
Extinct genus of tetrapodomorphs
it is known from multiple complete skeletons discovered in 1939 by A.S. Romer. These specimens hail from the Geraldine bonebed, a deposit of the coastal
Archeria_(animal)
Paraphyletic group of tetrapodomorphs
(link) "New Fossils Of Extremely Primitive 4-Legged Creatures Close The Gap Between Fish And Land Animals". Science News. Science Daily. Retrieved 28
Ichthyostegalia
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Rhizodus
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Kenichthys
Extinct genus of amphibians
Conrad; Laurin, Michel; Berner, Robert A. (2008). "Confirmation of Romer's Gap as a low oxygen interval constraining the timing of initial arthropod
Megalocephalus
Clade of the first four-limbed vertebrates and their descendants
which is followed by another gap in the tetrapod fossil record, Romer's gap, also known as the Tournaisian gap. This gap, which was initially 30 million
Tetrapod
Evolution of fish
to the Mid Carboniferous a 30 million year gap occurs in the fossil record. This gap, called Romer's gap, is marked by the absence of ancestral tetrapod
Timeline_of_fish_evolution
Extinct order of amphibians
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Adelospondyli
Extinct genus of tetrapodomorphs from the Devonian
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Hyneria
Paraphyletic group of tetrapodomorphs
from the Carboniferous and lower Permian. As defined by Alfred Sherwood Romer however, the anthracosaurs include all non-amniote "labyrinthodont" reptile-like
Anthracosauria
Extinct genus of amphibians
find is important, as the quarry represents terrestrial deposits from Romer's gap, a period poor in fossils where the higher groups "labyrinthodonts" evolved
Silvanerpeton
Clade of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Elpistostegalia
Paraphyletic group of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Osteolepiformes
Extinct family of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Elginerpetontidae
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Elginerpeton
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Phlegethontia
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Ophiderpeton
Polyphyletic group of tetrapodomorphs
Nature (advance online publication) doi:10.1038/nature22966> Colbert 1969 Romer 1966 Carroll 1988 Benton 2000 Carroll, Robert L. (1995). "Problems of the
Lepospondyli
Extinct genus of tetrapods
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Whatcheeria
Extinct genus of tetrapodomorphs
belonged to a lobe-finned fish, probably a rhizodont. In 1958, Alfred Sherwood Romer attempted to name another species, Pholiderpeton bretonensis, based on jaw
Pholiderpeton
Subclass of amphibians
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Lissamphibia
Clade of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Eotetrapodiformes
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Tulerpeton
Clade of tetrapodomorphs
der Deutschen Labyrinthodonten Archegosaurus. Berlin: G. Reimer, 74 pp. Romer, A. S., (1947, revised ed. 1966) Vertebrate Paleontology, University of
Stegocephali
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Gyroptychius
Genus of Sarcopterygii (fish)
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Platycephalichthys
Extinct genus of lobe-finned fish
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Osteolepis
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Crassigyrinus
Extinct order of tetrapods
Formation) and Russia (Mezen complex) and the subsequent controversy over Olson's Gap, but there is a general consensus that at least some of these records are
Temnospondyli
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Eusthenopteron
Paraphyletic family of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Osteolepididae
Extinct clade of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Megalichthyiformes
Extinct genus of amphibians
chosen by Romer in keeping with a trend of naming long-bodied early tetrapods (such as Eogyrinus and Crassigyrinus) with the suffix "-gyrinus". Romer hesitated
Proterogyrinus
Extinct genus of fishes
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Strepsodus
Extinct genus of tetrapodomorphs
among the only known in the world from a period of time known as Romer's gap. Romer's gap, which spans most of the Mississippian age of the Carboniferous
Aytonerpeton
Extinct family of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Tristichopteridae
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Panderichthys
Extinct species of tetrapodomorph
it lies within Romer's gap, a time interval spanning most of the Early Carboniferous in which few tetrapod fossils are known. Romer's gap separates the
Occidens_portlocki
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Eoherpeton
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Mandageria
Extinct genus of tetrapodomorphs
burkemorani, first described by famed vertebrate paleontologist Alfred S. Romer in 1969, based on a skull and partial skeleton from the Bluefield Formation
Greererpeton
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Barameda
Extinct monospecific genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Spodichthys
Extinct genus of tetrapods
PMC 4878385. PMID 27231658. Clack, J. A. (2002). "An early tetrapod from 'Romer's Gap'". Nature. 418 (6893): 72–76. Bibcode:2002Natur.418...72C. doi:10.1038/nature00824
Westlothiana
Extinct genus of tetrapods
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Eucritta
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Sauripterus
Clade of tetrapods
it appears they separated from the other tetrapods somewhere during Romer's gap, when the adult tetrapods became fully terrestrial (some forms would
Amniote
Extinct genus of fishes
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Latvius
Extinct genus of amphibians
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Loxomma
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Gooloogongia
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Coloraderpeton
Extinct genus of tetrapodomorphs
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
Aztecia
Extinct genus of reptile-like amphibians
Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways Category
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