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Extinct genus of arthropods
Pentecopterus specimens would have had a total length of 75–100 cm (30–39 in). The large amount of fragmentary specimens recovered of Pentecopterus,
Pentecopterus
470 million year old meteor crater in Iowa
Among them was a newly discovered species of eurypterid, Pentecopterus decorahensis. Pentecopterus was scorpion-like in appearance, and the largest predator
Decorah_crater
Ancient Greek galley
would also have exceeded initial estimates. Hellenistic-era warships Pentecopterus, a genus of eurypterid named after the penteconter. Decarch (military
Penteconter
Order of arthropods (fossil)
2 ft) in life, rivalling the pterygotids in size. Another giant was Pentecopterus decorahensis, a primitive carcinosomatoid, which is estimated to have
Eurypterid
Extinct genus of arthropods
grouped together in the Megalograptidae since 1955. In 2015, the genus Pentecopterus was also assigned to the family. Kenneth E. Caster and Erik N. Kjellesvig-Waering
Megalograptus
Family of arthropods (fossil)
from the Late Ordovician of Laurentia with the exception of the large Pentecopterus from the Middle Ordovician. Megalograptids are characterized by large
Megalograptidae
Fossil genus of arthropod
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Archopterus
Extinct genus of arthropods
Carcinosomatoidea Megalograptidae Pentecopterus decorahensis Echinognathus clevelandi Megalograptus williamsae Megalograptus ohioensis Megalograptus welchi
Echinognathus
Extinct genus of arthropods
Carcinosomatoidea Megalograptidae Pentecopterus decorahensis Echinognathus clevelandi Megalograptus williamsae Megalograptus ohioensis Megalograptus welchi
Terropterus
Second period of the Paleozoic Era
Pentecopterus, an early eurypterid, and found in Iowa
Ordovician
Extinct genus of eurypterid
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Megarachne
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Hallipterus
Iowa geological formation
in the United States. Fossils include the oldest known eurypterid, Pentecopterus, as well as giant conodonts such as Iowagnathus and Archeognathus. The
Winneshiek_Shale
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Bassipterus
Sedimentary deposit with well-preserved extraordinary fossils
Pentecopterus, the oldest known eurypterid
Lagerstätte
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Dorfopterus
City in Iowa, United States
bizarre sea creatures that hardened into fossils. One such creature is Pentecopterus decorahensis, which was named for the city. As of the 2020 census, Decorah
Decorah,_Iowa
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Stylonurella
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Waeringopterus
largest megalograptid as well as the largest Ordovician eurypterid was Pentecopterus. It reached up to 1.7 m (5 ft 7 in) in length. All these were eurypterine
Largest_prehistoric_animals
uncertain phylogenetic placement. The type species is Notchia weugi. Pentecopterus Gen. et sp. nov Valid Lamsdell et al. Ordovician (Darriwilian) Winneshiek
2015 in arthropod paleontology
2015_in_arthropod_paleontology
Extinct suborder of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Stylonurina
Genus of Eurypterid
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Orcanopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Nanahughmilleria
Genus of arthropods (fossil)
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Adelophthalmus
Extinct family of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Hibbertopteridae
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Eusarcana
Extinct genus of Conodont
grandis. Another contemporary macropredator in the Winneshiek Shale was Pentecopterus decorahensis, a large eurypterid belonging to the megalograptid family
Iowagnathus
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Kokomopterus
Pentecopterus, the oldest known eurypterid
List_of_lagerstätten
Paleontological research in the U.S. state of Iowa
His suspicions were later confirmed by a professional paleontologist. Pentecopterus is a Eurypterid that patrolled the early Ordovician waters of what is
Paleontology_in_Iowa
Extinct genus of Devonian organisms
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Strobilopterus
Extinct Devonian genus of Eurypterida
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Jaekelopterus
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Hunanopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Moselopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Woodwardopterus
Extinct superfamily of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Lanarkopteridae
Extinct family of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Moselopteridae
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Eurypterus
Extinct family of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Onychopterellidae
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Brachyopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Hardieopterus
noctua is described. Lamsdell et al. described the new genus and species Pentecopterus decorahensis, the oldest eurypterid known to date. McCoy, Lamsdell,
Timeline of eurypterid research
Timeline_of_eurypterid_research
Extinct genus of eurypterid
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Pterygotus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Salteropterus
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Drepanopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Pagea
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Ctenopterus
Extinct family of eurypterids
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Pterygotidae
Extinct superfamily of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Carcinosomatoidea
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Mycterops
Extinct family of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Mycteroptidae
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Lanarkopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Hibbertopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Parastylonurus
Extinct genus of Devonian eurypterids
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Wiedopterus
Genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Pittsfordipterus
Extinct genus of Arthropod
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Hastimima
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Eocarcinosoma
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Necrogammarus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Campylocephalus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Ciurcopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Mixopterus
Extinct superfamily of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Mycteropoidea
Genus of arthropods (fossil)
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Buffalopterus
Extinct superfamily of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Stylonuroidea
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Eysyslopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Pruemopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Herefordopterus
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Cruinnopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Slimonia
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Paraeurypterus
Extinct genus of eurypterids
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Rhinocarcinosoma
Pentecopterus.
List_of_eurypterid_genera
Extinct genus of Devonian organisms
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Stylonurus
Suborder of eurypterid
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Eurypterina
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Stoermeropterus
Extinct genus of Devonian organisms
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Vinetopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Erieopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Parahughmilleria
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Laurieipterus
Extinct genus of Devonian organisms
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Rhenopterus
Extinct family of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Waeringopteridae
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Acutiramus
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Tarsopterella
"Meet Pentecopterus, a new predator from the prehistoric seas". Yale University. Retrieved 1 September 2015. Staff (1 September 2015). "Pentecopterus decorahensis:
2015_in_science
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Vernonopterus
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Pentlandopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Carcinosoma
Infraorder of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Diploperculata
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Erettopterus
Extinct family of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Stylonuridae
Family of eurypterids
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Adelophthalmoidea
Genus of eurypterid
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Unionopterus
Extinct superfamily of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Dolichopteroidea
Extinct genus of sea scorpions
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Grossopterus
Extinct genus of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Tylopterella
Extinct family of eurypterids
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Slimonidae
Genus of extinct arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Hughmilleria
Extinct superfamily of arthropods
Hughmilleria Jaekelopterus Megalograptus Megarachne Mixopterus Onychopterella Pentecopterus Pterygotus Slimonia Stylonurus Ichnogenera Arcuites Merostomichnites
Rhenopteroidea
PENTECOPTERUS
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PENTECOPTERUS
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