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Calymene blumenbachii Temporal range: Wenlock ~428–422 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Calymene blumenbachii, on display at the Natural History Museum, London
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Phacopida
Family:	†Calymenidae
Genus:	†Calymene
Species:	†C. blumenbachii
Binomial name
†Calymene blumenbachii Brongniart in Desmarest, 1817

Calymene Brongniart in Desmarest (1817), sometimes erroneously spelled blumenbachi, is a species of trilobite discovered in the limestone quarries of the Wren's Nest in Dudley, England. Nicknamed the Dudley Bug or Dudley Locust by 18th-century quarrymen it became a symbol of the town and featured on the Dudley County Borough Council coat-of-arms. Calymene blumenbachii is commonly found in Silurian rocks (422.5–427.5 million years ago) and is thought to have lived in the shallow waters of the Silurian, in low-energy reefs. This particular species of Calymene (a fairly common genus in the Ordovician-Silurian) is unique to the Wenlock series in England, and comes from the Wenlock Limestone Formation in Much Wenlock and the Wren's Nest in Dudley. These sites seem to yield trilobites more readily than any other areas on the Wenlock Edge, and the rock here is dark grey as opposed to yellowish or whitish as it appears on other parts of the Edge, just a few miles away, in Church Stretton and elsewhere. This suggests local changes in the environment in which the rock was deposited.

References

1. Desmarest, A. G. 1817. Calymène. in: Nouveau Dictionnaire d'Histoire Naturelle, Nouvelle Edition, Tome 8, pp. 517 - 518.
2. Alex J. Chestnut. "Using morphometrics, phylogenetic systematics and parsimony analysis to gain insight into the evolutionary affinities of the Calymenidae Trilobita". OhioLINK ETD Center. Retrieved 21 August 2011.

External links

• Dudley County Borough Council coat-of-arms Archived 5 June 2009 at the Wayback Machine at Civic Heraldry
• Wren's Nest at bbc.co.uk
• Siveter, Derek J. "The type species of Calymene (Trilobita) from the Silurian of Dudley, England". Palaeontology. 28 (4): 783–792.
• Donald G. Mikulic & Joanne Kluessendorf, 2007: The legacy of the locust—Dudley and its famous trilobite Calymene blumenbachii. In: D. G. Mikulic, et al., editors. Fabulous Fossils, 300 years of worldwide research on trilobites. New York State Museum Bulletin 507, p. 141-170. https://web.archive.org/web/20140714172533/http://www.nysm.nysed.gov/staffpubs/docs/16439.pdf

v t e Trilobites
Taxonomy	Orders Agnostida Asaphida Corynexochida Harpetida Redlichiida Lichida Phacopida Proetida Ptychopariida Genera List of trilobites
Geochronology	Cambrian Ordovician Silurian Devonian Carboniferous Permian
Notable fossils	Earliest Fritzaspis spp. Hupetina antiqua Lunagraulos Profallotaspis jakutensis Serrania gordaensis Latest Acropyge Cheiropyge Carniphillipsia Kathwaia Paraphillipsia Pseudophillipsia First described Calymene Largest Isotelus Hungioides Smallest Acanthopleurella
Notable trilobitologists	Alexander von Humboldt Joachim Barrande Alfred Russel Wallace Charles Doolittle Walcott Charles Emerson Beecher Roderick Murchison Adam Sedgwick Rudolf Kaufmann Rudolf Richter & Emma Richter Martin Basse Niles Eldredge George Frederic Matthew Harry B. Whittington Brian D. E. Chatterton Richard Fortey Euan Clarkson Franco Rasetti Gregory D. Edgecombe Bruce S. Lieberman Gerald J. Kloc Gerhard K. B. Alberti Teiichi Kobayashi Johan Wilhelm Dalman
Paleobiology	Cambrian explosion Cruziana Diplichnites Permian–Triassic extinction event Rusophycus Trilobite zone
Notable fossil sites	Anti-Atlas Mountains Beecher's Trilobite Bed Burgess Shale Emu Bay Shale Gees, Gerolstein Hunsrück Slate Jince Formation Latham Shale Llandeilo Group Maotianshan Shales Silica Shale Formation Takaka Terrane Walcott–Rust quarry Wenlock Group Wheeler Shale Wolchov River Wren's Nest
Morphology	Exoskeleton Tagmata Cephalon Thorax Pygidium Axial lobe Pleural lobe Terminology Cranidium Effacement Enrollment Facial sutures Fixigena Gena Genal angle Glabella Gonatoparian Heteronomous Homonomous Hypostome Isopygous Librigena Macropygous Micropygous Opisthoparian Proparian Prosopon Spinosity Subisopygous Soft body parts Appendages Digestive tract Internal organs Musculature Antennae Eyes Sensory pits
Category:Trilobites

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• Calymenidae
• Silurian trilobites of Europe
• Silurian England
• Fossils of England
• Fossil taxa described in 1817
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