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Acmarhachis typicalis

Description

Acmarhachis is a genus of trilobite in the order Agnostida, which lived in what are now Australia (Queensland, Tasmania), Canada (British Columbia, Newfoundland, Northwest Territories), China (Anhui), Kazakhstan, Russia (Kharaulakh), and the US (Alaska, Alabama, Nevada, Maryland, Vermont). It was described by Resser in 1938, and the type species is Acmarhachis typicalis.


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)8520244https://www.gbif.org/species/8520244
PaleoBioDB ID (PBDB)203567https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=203567
Rankspecies
Taxonomy (GBIF)Life : Animalia : Arthropoda : Trilobita : Agnostida : Agnostidae : Acmarhachis : Acmarhachis typicalis
Taxonomy (PBDB)Life : Animalia : Arthropoda : Trilobita : Agnostida : Agnostidae : Acmarhachis : Acmarhachis typicalis
Taxonomic Status (GBIF)accepted
Classification
(PBDB,GBIF)
RankNameAuthor
-Eukaryota
-OpisthokontaCavalier-Smith 1987
kingdomAnimalia
-Bilateria
-EubilateriaAx 1987
-ProtostomiaGrobben 1908
-Ecdysozoa
-Panarthropoda
phylumArthropodaLatreille 1829
subphylumMandibulata
classTrilobitaWalch 1771
orderAgnostidaSalter 1864
familyAgnostidaeM'Coy 1849
genusAcmarhachisResser 1938
speciesAcmarhachis typicalisResser 1938
Generic NameAcmarhachis
Scientific NameAcmarhachis typicalis Resser, 1938
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Acmarhachis typicalisspeciesbelongs to Acmarhachisstated with evidenceResser, 1938
Acmarhachis typicalisspeciesbelongs to Acmarhacisstated without evidenceWestrop et al., 1996
Acmarhachis typicalisspeciesmisspelling of Acmarhachis typicalisstated without evidenceErgaliev and Ergaliev, 2008
Status (PBDB)extinct
Taxon Size (PBDB)1
First Recorded Appearance505 - 499 Ma
Cambrian
Last Recorded Appearance499 - 485 Ma
Cambrian
Environmentmarine (based on Trilobita)
Motilityslow-moving (based on Agnostida)
Visionblind (based on Agnostidae)
Dietdetritivore (based on Agnostida)
Ontogenymolting,addition of parts (based on Trilobita)
Taphonomylow Mg calcite, chitin (based on Trilobita)
Primary Reference (PBDB)G. K. Ergaliev and F. G. Ergaliev. 2008. Agnostidy srednego i verkhnego Kembriya Aksayskogo Gosudarstvennogo Geologicheskogo Zakaznika v yushnom Kazakhstane (Kyrshabakty, Malyy Karatau) [Middle and Upper Cambrian Agnostida from the Aksai National Geological Reserve in southern Kazakhstan (Kyrshabakty River, Malyy Karatau Range)]
Wikipediahttps://en.wikipedia.org/wiki/Acmarhachis_typicalis

Fossil Distribution

Obsolete Names

NameSourceTaxon RankTaxonomy
Cyclagnostus yaogongbuensis Lu & Lin, 1987GBIFspeciesAnimalia : Arthropoda : Trilobita : Agnostida : Agnostidae : Acmarhachis : Cyclagnostus yaogongbuensis
Acmarhacis typicalis Resser, 1938GBIFspeciesAnimalia : Arthropoda : Trilobita : Agnostida : Agnostidae : Acmarhachis : Acmarhacis typicalis

Synonymy List

YearName and Author
1938Acmarhachis typicalis Resser
1987Cyclagnostus yaogongbuensis Lu and Lin
1996Acmarhacis typicalis Westrop et al. p. 820

References

Ergaliev G. K., Ergaliev F. G. (2008) , Agnostidy srednego i verkhnego Kembriya Aksayskogo Gosudarstvennogo Geologicheskogo Zakaznika v yushnom Kazakhstane (Kyrshabakty, Malyy Karatau) [Middle and Upper Cambrian Agnostida from the Aksai National Geological Reserve in southern Kazakhstan (Kyrshabakty River, Malyy Karatau Range)], 1-359
Westrop S. R., Ludvigsen R., et al (1996) Marjuman (Cambrian) agnostoid trilobites of the Cow Head Group, western Newfoundland, Journal of Paleontology 70 5, 804-829
S. Peng, R. A. Robison (2000) Agnostid biostratigraphy across the Middle-Upper Cambrian boundary in Hunan, China: Journal of Paleontology Memoir - via Catalogue of Life
G. K. Ergaliev, F. G. Ergaliev (2008) Agnostidy srednego i verkhnego Kembriya Aksayskogo Gosudarstvennogo Geologicheskogo Zakaznika v yushnom Kazakhstane (Kyrshabakty, Malyy Karatau) [Middle and Upper Cambrian Agnostida from the Aksai National Geological Reserve in southern Kazakhstan (Kyrsha - via Catalogue of Life
Y. H. Lu, H. L. Lin (1989) The Cambrian trilobites of western Zhejiang: Palaeontologia Sinica, new series B: 1--287 - via Catalogue of Life
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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