''Dudleyaspis'' is an extinct genus of

Lower Lower may refer to: *Lower (surname) *Lower Township, New Jersey *Lower Receiver (firearms) *Lower Wick Lower Wick is a small hamlet located in the county of Gloucestershire, England. It is situated about five miles south west of Dursley, eight ...

Middle Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, wher ...

trilobite Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the At ...

s that lived in a shallow sea that lay between

Euramerica Laurasia () was the more northern of two large landmasses that formed part of the Pangaea supercontinent from around ( Mya), the other being Gondwana. It separated from Gondwana (beginning in the late Triassic period) during the breakup of Pan ...

and

Gondwana Gondwana () was a large landmass, often referred to as a supercontinent, that formed during the late Neoproterozoic (about 550 million years ago) and began to break up during the Jurassic period (about 180 million years ago). The final stages ...

.Ramsköld, L. (1984). Silurian Odontopleurid trilobites from Gotland. ''Palaeontology'' 27, 2, 239–264. It was named in 1949 by Prantl & Pribyl. Fossils of ''Dudleyaspis'' have been found in the following locations: *Australia: Bathurst ( Jesse Limestone),

Mudgee Mudgee is a town in the Central West (New South Wales), Central West of New South Wales, Australia. It is in the broad fertile Cudgegong River valley north-west of Sydney and is the largest town in the Mid-Western Regional Council Local gover ...

( Flirtation Hill) and

Murrumbateman Murrumbateman is a town in the Southern Tablelands of New South Wales, Australia. It is on the Barton Highway, approximately 30 kilometres north-west of Canberra, and is part of the Yass Valley Shire. At the , Murrumbateman had a population of 3 ...

( Black Bog Formation – Yarwood Siltstone Member) *Canada:

Northwest Territories The Northwest Territories (abbreviated ''NT'' or ''NWT''; french: Territoires du Nord-Ouest, formerly ''North-Western Territory'' and ''North-West Territories'' and namely shortened as ''Northwest Territory'') is a federal territory of Canada. ...

(

Mackenzie Mountains The Mackenzie Mountains are a Canadian mountain range forming part of the Yukon-Northwest Territories boundary between the Liard and Peel rivers. The range is named in honour of Canada's second prime minister, Alexander Mackenzie. Nahanni Nat ...

–

Delorme DeLorme is the producer of personal satellite tracking, messaging, and navigation technology. The company’s main product, ''inReach'', integrates GPS and satellite technologies. ''inReach'' provides the ability to send and receive text messages ...

and Whittaker Formations) and

Nunavut Nunavut ( , ; iu, ᓄᓇᕗᑦ , ; ) is the largest and northernmost Provinces and territories of Canada#Territories, territory of Canada. It was separated officially from the Northwest Territories on April 1, 1999, via the ''Nunavut Act'' ...

( Bailie-Hamilton and Cornwallis Islands –

Cape Phillips Formation This is a list of fossiliferous stratigraphic units in Nunavut, Canada. References * {{Lists of fossiliferous stratigraphic units in Canada Nunavut Nunavut ( , ; iu, ᓄᓇᕗᑦ , ; ) is the largest and northernmost territory of C ...

) *

Czech Republic The Czech Republic, or simply Czechia, is a landlocked country in Central Europe. Historically known as Bohemia, it is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the southeast. The ...

Prague Prague ( ; cs, Praha ; german: Prag, ; la, Praga) is the capital and largest city in the Czech Republic, and the historical capital of Bohemia. On the Vltava river, Prague is home to about 1.3 million people. The city has a temperate ...

(Loc. 5.2 – C. colonus Zone) *England:

Cannock Cannock () is a town in the Cannock Chase district in the county of Staffordshire, England. It had a population of 29,018. Cannock is not far from the nearby towns of Walsall, Burntwood, Stafford and Telford. The cities of Lichfield and Wolverh ...

( Shelve District) and

Dudley Dudley is a large market town and administrative centre in the county of West Midlands, England, southeast of Wolverhampton and northwest of Birmingham. Historically an exclave of Worcestershire, the town is the administrative centre of the ...

(

Wren's Nest The Wren's Nest is a geological Site of Special Scientific Interest in the Dudley Metropolitan Borough, north west of the town centre of Dudley, in the West Midlands of England. It is one of the most important geological locations in Britain. ...

–

Much Wenlock Limestone Formation The Much Wenlock Limestone Formation is a series of Silurian limestone beds that date back to the Homerian age, the later part of the Wenlock epoch.{{cite web , url=http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=WEL , title=Much Wenlock Limeston ...

) *France: Coumiac (Coumiac

quarry A quarry is a type of open-pit mine in which dimension stone, rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some jurisdictions to reduce their envi ...

–

Coumiac Formation The Coumiac Formation is a geologic formation in France. It preserves fossils dated to the Devonian period. The Global Boundary Stratotype Section and Point (GSSP) for the base of the Famennian Stage of the Devonian is located at Coumiac quarry ...

) *Sweden: western Gotland (

Visby Visby () is an urban area in Sweden and the seat of Gotland Municipality in Gotland County on the island of Gotland with 24,330 inhabitants . Visby is also the episcopal see for the Diocese of Visby. The Hanseatic city of Visby is arguably th ...

– Rönnklint

sea cliff Seacliff or Sea Cliff or Sea Cliffe may refer to: ;Places ''Australia'' *Seacliff, South Australia, suburb of Adelaide *Seacliff Park, South Australia, a suburb of Adelaide *Sea Cliff Bridge, in Illawarra, New South Wales ''New Zealand'' *Seacli ...

and Kättelviken) *United States:

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolita ...

(Chicago – Racine Dolomite and Kankakee – Racine Dolomite),

Iowa Iowa () is a state in the Midwestern region of the United States, bordered by the Mississippi River to the east and the Missouri River and Big Sioux River to the west. It is bordered by six states: Wisconsin to the northeast, Illinois to the ...

( Hopkinton Dolomite),

Oklahoma Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...

( Anadarko –

Henryhouse Formation The Henryhouse Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Silurian period. See also * List of fossiliferous stratigraphic units in Oklahoma * Paleontology in Oklahoma Paleontology in Oklahoma refe ...

Amsden T. W. (1975) Hunton Group of the Anadarko Basin of Oklahoma:, ''Oklahoma Geological Survey Bulletin'' 121, 1–301) and

Wisconsin Wisconsin () is a state in the upper Midwestern United States. Wisconsin is the 25th-largest state by total area and the 20th-most populous. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake M ...

(

Milwaukee Milwaukee ( ), officially the City of Milwaukee, is both the most populous and most densely populated city in the U.S. state of Wisconsin and the county seat of Milwaukee County. With a population of 577,222 at the 2020 census, Milwaukee is ...

– Racine DolomiteMikulic D. G. (1999) Silurian trilobite associations in North America, Paleocommunities—a case study from the Silurian and Lower Devonian, 793–798)

References

Odontopleurida Trilobite genera Fossil taxa described in 1949 {{Trilobite-stub