"Cyclopyge" redirects here. For the skipper genus, see Olafia.
Cyclopyge is a genus of small to average size trilobites that lived during the Ordovician. Like all members of the family Cyclopigidae, it has very large convex eyes, that cover most of the free cheeks, and in some species touch each other. The eyes almost touch the large glabella. The occipital ring has merged with the rest of the glabella. The glabella does not extend into a frontal thorn. The cephalon lacks genal spines. The 6 thorax segments have short pleurae. The pygidium is rather large, and often rather effaced. These are features that also occur in other Cyclopygidae, and are indications of a pelagic lifestyle.[1]
The genus was first named Egle by Barrande, but that name was not available, since it was used by Robineau-Desvoidy before for a willow catkin fly of the Anthomyiidae family.
The agnostid trilobite Pseudagnostus cyclopyge, or previously known as Agnostus cyclopyge.
The agnostid trilobite Rhaptagnostus cyclopygeformis, or previously known as Agnostus cyclopygeformis.
The butterfly previously known as Cyclopyge Mielke, 2002.
The millipede Rhamphidarpoides cyclopyge, belonging to the Spirostreptida order.
Distributionedit
As pelagic creatures, cyclogygids were not bound to shallow waters surrounding continents and islands. At the time they lived, continents weren't blocking the exchange between different parts of the ocean, and this means they probably had large distributions, comprising one or more climate zones worldwide. Cyclopyge is well known from the Czech Republic, Morocco, England, Sweden, Canada (Newfoundland) and the United States.[1]
Cyclopyge recurva occurs in the Ordovician of China (Pagoda Formation of southwestern Shaanxi).[2]
Referencesedit
^ abWhittington, H. B. et al. Part O, Treatise on Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997
^Zhou Zhiyi; Zhou Zhiqiang (2009). "Ordovician cyclopygid trilobites from the Pagoda Formation of southwestern Shaanxi, China". AAP Memoir. 37: 87–101. Archived from the original on 20 June 2013. Retrieved 7 June 2013.
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cyclopyge, trilobite, cyclopyge, redirects, here, skipper, genus, olafia, cyclopyge, genus, small, average, size, trilobites, that, lived, during, ordovician, like, members, family, cyclopigidae, very, large, convex, eyes, that, cover, most, free, cheeks, some. Cyclopyge redirects here For the skipper genus see Olafia Cyclopyge is a genus of small to average size trilobites that lived during the Ordovician Like all members of the family Cyclopigidae it has very large convex eyes that cover most of the free cheeks and in some species touch each other The eyes almost touch the large glabella The occipital ring has merged with the rest of the glabella The glabella does not extend into a frontal thorn The cephalon lacks genal spines The 6 thorax segments have short pleurae The pygidium is rather large and often rather effaced These are features that also occur in other Cyclopygidae and are indications of a pelagic lifestyle 1 CyclopygeTemporal range Ordovician PreꞒ Ꞓ O S D C P T J K Pg NCyclopyge sp cephalon 13 mm 0 51 in long Alnif MoroccoScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ArthropodaClass TrilobitaOrder AsaphidaFamily CyclopygidaeGenus CyclopygeType speciesEgle redivivaSpeciesC rediviva Barrande 1846 C recurva Lu 1962Hawle amp Corda 1847 non Cyclopyge Mielke 2002 Olafia butterfly SynonymsEgle Barrande 1846 non Egle Desvoidy 1830 Aeglina Contents 1 Taxonomy 1 1 Species previously assigned to Cyclopyge 1 2 Species that may be confused with Cyclopyge 2 Distribution 3 ReferencesTaxonomy editThe genus was first named Egle by Barrande but that name was not available since it was used by Robineau Desvoidy before for a willow catkin fly of the Anthomyiidae family Species previously assigned to Cyclopyge edit C binodosa Pricyclopyge binodosa C genatenta Prospectatrix genatentaSpecies that may be confused with Cyclopyge edit The agnostid trilobite Pseudagnostus cyclopyge or previously known as Agnostus cyclopyge The agnostid trilobite Rhaptagnostus cyclopygeformis or previously known as Agnostus cyclopygeformis The butterfly previously known as Cyclopyge Mielke 2002 The millipede Rhamphidarpoides cyclopyge belonging to the Spirostreptida order Distribution editAs pelagic creatures cyclogygids were not bound to shallow waters surrounding continents and islands At the time they lived continents weren t blocking the exchange between different parts of the ocean and this means they probably had large distributions comprising one or more climate zones worldwide Cyclopyge is well known from the Czech Republic Morocco England Sweden Canada Newfoundland and the United States 1 Cyclopyge recurva occurs in the Ordovician of China Pagoda Formation of southwestern Shaanxi 2 References edit a b Whittington H B et al Part O Treatise on Invertebrate Paleontology Revised Volume 1 Trilobita Introduction Order Agnostida Order Redlichiida 1997 Zhou Zhiyi Zhou Zhiqiang 2009 Ordovician cyclopygid trilobites from the Pagoda Formation of southwestern Shaanxi China AAP Memoir 37 87 101 Archived from the original on 20 June 2013 Retrieved 7 June 2013 nbsp This Asaphida related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Cyclopyge trilobite amp oldid 1126467177, wikipedia, wiki, book, books, library,
