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{{Taxobox<br />
| image = <br />
| image_caption = <br />
| fossil_range = {{fossil_range| 470|444|Middle and Upper Ordovician}}<br />
| regnum = [[Animal]]ia<br />
| phylum = [[Arthropod]]a<br />
| classis = [[trilobite|Trilobita]]<br />
| ordo = [[Asaphida]]<br />
| subordo =<br />
| superfamilia = [[Cyclopygoidea]]<br />
| familia = [[Cyclopygidae]]<br />
| genus = '''''Sagavia'''''<br />
| genus_authority = Koroleva, 1967<br />
| subdivision_ranks = [[species]]<br />
| subdivision =<br />
* ''S. felix'' <small>Koroleva, 1967 ([[Type (biology)|type]])</small><br />
* ''S. chuanxiensis'' <small>(Li & Xiao, 1984)</small> [[Synonym (taxonomy)|synonym]] ''Microparia (Microparia) chuanxiensis<br />
* ''S. elongata'' <small>Petrunina, 1975</small><br />
* ''S. glans'' <small>Fortey & Owens, 1987</small><br />
* ''S. heterocyclopygeformis'' <small>Koroleva, 1982</small><br />
* ''S. modica'' <small> Koroleva, 1967</small><br />
* ''S. novakellaformis'' <small> Koroleva, 1982</small><br />
* ''S. zhuyegouensis'' <small> Koroleva, 1982</small> <br />
}}<br />
'''''Sagavia''''' is a genus of [[trilobite]]s that lived during the [[Ordovician|Middle and Upper Ordovician]] in what are now Northwest and Southeast China, North Kazakhstan and Wales. It is a typical [[Cyclopygidae|cyclopygid]] that can be distinguished by its large but separate eyes, elongated glabella, five thorax segments and a pygidium with clearly defined axis and border.<ref name='Z&Z'>{{cite journal|author1= Zhou Zhiyi|author2= Zhou Zhiqiang|year= 2007|title= The Late Ordovician cyclopygid trilobite ''Sagavia'' Koroleva, 1967, from the Pagoda Formation of southwestern Shaanxi, China|journal= Memoirs of the Association of Australasian Palaeontologists|volume= 34|issue= |pages= 181–187|url= http://159.226.74.248:8000/pagelinks/131880.pdf|accessdate= 18 June 2013}}</ref><br />
<br />
== Distribution ==<br />
* ''S. felix'' has been collected from the Middle Ordovician of Kazakhstan (Caradoc, ''Nemagraptus gracilis'' Zone, Saga Formation, Saga River section, Stepnyak district).<br />
* ''S. modica'' is known from the Middle Ordovician of Kazakhstan (Caradoc, ''Nemagraptus gracilis'' Zone, Saga Formation, Saga River section, Stepnyak district).<br />
* ''S. chuanxiensis'' was found in the Middle and Upper Ordovician of China (late Caradoc-Ashgill, top of the Pagoda Formation, limestone block in a Triassic melange accumulation at Shiqu; Yuanba, Hougou and Liangshan, Nanzheng; Dangmengou and Zhuyegou, Ningqiang; Qishuba and Gaoqiaogou, Mianxian; all Northwestern Sichuan).<br />
* ''S. zhuyegouensis'' occurs at the Middle Ordovician of China (late Caradoc, Dangmengou, Ningqiang Northwestern Sichuan).<br />
* ''S. elongata'' is present in the Upper Ordovician of China (?Ashgill, ''Kielanella''-''Tretaspis'' Beds of the Ulugtay District, south Tien Shan).<br />
* ''S. glans'' was excavated from the Upper Ordovician of the United Kingdom (late Arenig, Pontyfenni Formation, South Wales).<br />
* ''S. heterocyclopygeformis'' is known from the Middle Ordovician of northern Kazakhstan (Caradoc).<br />
* ''S. novakellaformis'' occurs at the Koroleva from the Middle Ordovician of northern Kazakhstan (late Llanvirn?), and the United Kingdom (''Hustedograptus teretiusculus'' Biozone of the Llanfawn Mudstone Formation, central Wales).<ref name='Z&Z'/><br />
<br />
== Description ==<br />
The glabella of ''Sagavia'' is elongate with parallel sides or slightly converging towards the front. The large eyes are separated at the front by the glabella and the cephalic doublure. The [[Trilobite#Ventral sutures|rostral suture]] is vaulted upwards. It has a thorax of five segments. ''Sagavia'' has a pygidium with well a defined axis and border with clear furrows.<ref name='Z&Z'/><br />
<br />
=== Differences with related genera ===<br />
* ''Sagavia'' is similar to ''Microparia'' but has a more elongate glabella and much better defined pygidial axis and border. <br />
* ''Heterocyclopyge'' also has a defined pygidial axis, a five-segmented thorax, and a defined pygidial border, but has a shorter glabella and the pygidial border and axis are poorly defined medially.<ref name='Z&Z'/><br />
<br />
== References ==<br />
{{Reflist}}<br />
<br />
[[Category:Cyclopygidae]]<br />
[[Category:Asaphida genera]]<br />
[[Category:Ordovician trilobites]]<br />
[[Category:Fossils of China]]<br />
[[Category:Fossils of Kazakhstan]]<br />
[[Category:Fossils of the United Kingdom]]<br />
[[Category:Middle Ordovician first appearances]]<br />
[[Category:Late Ordovician extinctions]]</div>Caftaric