{{Short description|Extinct genus of brittle stars}} {{Automatic taxobox | image = Fossil Brittle Star Palaeocoma.jpg | image_caption = ''Palaeocoma milleri'', Lower Jurassic (Pliensbachian) England. | fossil_range = Ladinian-Toarcian<br>~{{fossil range|242|182}} | taxon = Palaeocoma | authority = d'Orbigny, 1850<ref>Orbigny A. D. d'. (1850-1852). ''Prodrome de paléontologie stratigraphique universelle des animaux mollusques et rayonnés faisant suite au cours élémentaire de paléontologie et de géologie stratigraphiques. Paris: Masson''. vol. '''1''' [January 1850 ("1849")]: lx + 394 pp.; vol. '''2''' [November 1850]: 427 pp.; vol. '''3''' [1852]: 389 pp.</ref> | subdivision_ranks = Species | subdivision = *''Palaeocoma escheri'' *''Palaeocoma milleri'' *''Palaeocoma raiblana'' }}
'''''Palaeocoma''''' is an extinct genus of brittle stars that lived during the Middle Triassic to Early Jurassic Periods. Its fossils have been found in Europe.<ref>Cyril Walker, David Ward ''Fossils : Smithsonian Handbook'', {{ISBN|0-7894-8984-8}} (2002, paperback, revisited), {{ISBN|1-56458-074-1}} (1992, 1st edition). Page 189.</ref>
==Distribution== The genus ''Palaeocoma'' was revised by Hess (1960, 1962)<ref name="Hess1960">{{cite journal |last1=Hess |first1=H. |year=1960 |title=''Ophioderma escheri'' Heer aus dem unteren Lias der Schambelen (Kt. Aargau) und verwandete Lias-Ophiuren aus England und Deutschland |journal=Eclogae Geologicae Helvetiae |volume=53 |pages=757–793 |language=de}}</ref><ref name="Hess1962">{{cite journal |last1=Hess |first1=H. |year=1962 |title=Mikropaläontologische Untersuchungen an Ophiuren II. Die Ophiuren aus dem Lias (Pliensbachien-Toarcien) von Seewen (Kt. Solothurn) |journal=Bericht der Schweitzerischen Palaeontologischen Gesellschaft |volume=55 |pages=609–656}}</ref> and is known from the Middle Triassic (Ladinian) to the Lower Jurassic (Toarcian) with occurrences reported from the United Kingdom,<ref name="Hess1964">{{cite journal |last1=Hess |first1=H. |year=1964 |title=Die Ophiuren des englischen Jura |journal=Eclogae Geologicae Helvetiae |volume=57 |pages=755–821}}</ref><ref>{{cite journal |last1=Kutscher |first1=M. |year=1996 |title=Echinodermata aus dem Ober-Toarcium und Aalenium Deutschlands II: Ophiuroidea |journal=Stuttgarter Beiträge zur Naturkunde, Serie B (Geologie und Paläontologie) |volume=242 |pages=1–33}}</ref> France,<ref>{{cite journal |last1=Thuy |first1=B. |year=2011 |title=Exceptionally well-preserved brittle stars from the Pliensbachian (Early Jurassic) of the French Ardennes |journal=Palaeontology |volume=54 |issue=1 |pages=215–233 |doi=10.1111/j.1475-4983.2010.00981.x|bibcode=2011Palgy..54..215T |s2cid=140581836 }}</ref><ref>{{cite journal |last1=Thuy |first1=B. |last2=Gale |first2=A.S. |last3=Reich |first3=M. |year=2011 |title=A new echinoderm Lagerstätte from the Pliensbachian (Early Jurassic) of the French Ardennes. |journal=Swiss Journal of Palaeontology |volume=130 |issue=1 |pages=173–185 |doi=10.1007/s13358-010-0015-y|doi-access=free |bibcode=2011SwJP..130..173T }}</ref> Luxembourg,<ref>{{cite journal |last1=Kutscher |first1=M. |last2=Hary |first2=A. |year=1991 |title=Echinodermen im Unteren Lias (''bucklandi''-und ''semicostatum''-zone) zwischen Ellange und Elvange (SE-Luxemburg) |journal=Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen |volume=182 |pages=37–72|doi=10.1127/njgpa/182/1991/37 }}</ref> Germany,<ref>{{cite journal |last1=Kutscher |first1=M. |year=1988 |title=Zur Invertebratenfauna und Stratigraphie desoberen Pliensbachien von Grimmen (DDR), Echinodermata |journal=Freiberger Forschungsheft, C |volume=419 |pages=62–70}}</ref> Switzerland,<ref name="Hess1960"/><ref name="Hess1962"/> Italy,<ref>{{cite journal |last1=Pinna |first1=G. |year=1985 |title=Exceptional preservation in the Jurassic of Osteno. |journal=Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences |volume=311 |issue=1148 |pages=171–180 |doi=10.1098/rstb.1985.0149|bibcode=1985RSPTB.311..171P }}</ref> and Serbia and Montenegro.<ref>{{cite journal| last1=Bachmayer |first1=F. |last2=Kollmann |first2=H.A. |year=1968 |title=Ein Ophiure aus der Trias Jugoslawiens |journal=Annalen des Naturhistorischen Museums in Wien |volume=72 |pages=645–648}}</ref>
==Type species== ''Palaeocoma milleri'' (Phillips, 1829)<ref>Phillips J. (1829). Illustrations of the Geology of Yorkshire; or a description of the strata and organic remains of the Yorkshire Coast. Part 1. 192 pp. York.</ref> [= ''P. gaveyi'' and ''P. egertoni'' according to Jaselli (2015, p. 192)], an Early Jurassic (Sinemurian and Pliensbachian) species recorded from France, Germany, Luxembourg, the United Kingdom and Lombardy in Italy.<ref>Jaselli, L., 2015. The Lower Jurassic (Early Sinemurian) ophiuroid ''Palaeocoma milleri'' in the palaeontological collection of the Museo di Storia Naturale “Antonio Stoppani” (Italy). ''Bollettino della Società Paleontologica Italiana'', '''54''' (3), 187-195. Modena.</ref>
===Synonymised names=== :''Ophioderma carinata'' Wright, 1866<ref>{{cite book |last1=Wright |first1=T. |year=1866 |title=A monograph on the British fossil Echinodermata from the Oolitic formations. 2/2 On the Ophiuroidea |publisher=Paleontologr. Society London}}</ref> :''Ophioderma egertoni'' (Broderip, 1840)<ref>{{cite journal |last1=Broderip |first1=W. J. |year=1840 |title=Description of some fossil Crustacea and Radiata, found at Lyme Regis, in Dorsetshire. |journal=Transactions of the Geological Society of London |volume=2 |pages=390–396}}</ref> :''Ophioderma gaveyi'' Wright, 1854<ref>{{cite journal |last1=Wright |first1=T. |year=1854 |title=Contributions to the Palaeontology of Gloucestershire: a description, with figures of some new species of Echinodermata from the Lias and Oolites |journal=The Annals and Magazine of Natural History |volume=2 |issue=13 |pages=376–383}}</ref> :''Ophioderma milleri'' (Phillips, 1829) :''Ophiura egertoni'' Broderip, 1840 :''Ophiura milleri'' Phillips, 1829 :''Ophiurella milleri'' (Phillips, 1829) :''Palaeocoma egertoni'' (Broderip, 1840) :''Palaeocoma gaveyi'' (Wright, 1854)
== Other species == *''Palaeocoma escheri'' Herr, 1865<ref>Herr, O. (1865). Die Urwelt der Schweiz. 1. 622 pp. Schulthess, Zürich.</ref> [= ''Ophiura ventrocarinata'' Quenstedt 1876]<ref>Quenstedt, F. A. 1876. ''Petrefactenkunde Deutschlands: Erste Abtheilung, Vierter (4) Band, Echinodermen (Asteriden und Encriniden)''. 742 pp. Fues Verlag, Leipzig.</ref> was redescribed by Hess (1960) and recorded from the Lower Lias Staffelegg Formation,<ref>Reisdorf A. G., Wetzel, A., Schlatter, R., Jordan, P. 2011. The Staffelegg Formation: a new stratigraphic schemefor the Early Jurassic of northern Switzerland. ''Swiss J Geosci'' '''104''': 97 – 146.</ref> of Schambelen near Mülligen in the Canton of Aargau of northern Switzerland. It occurs in the Hettangian, the earliest age and lowest stage of the Jurassic period and, specifically, the ''Psiloceras planorbis'' Ammonite Zone. *''Palaeocoma raiblana'' (Toula, 1887).<ref>Toula, F. (1887). Über ''Aspidura raiblana'' nov. spec. ''Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften'', '''96''', 361-369.</ref> This species has so far only been found in the Triassic Wengener Schichten Formation (Ladinian) of Budva in Serbia and Montenegro).
== Gallery == <gallery> File:Palaeocoma milleri.jpg|''Palaeocoma milleri'' from the famous 'Starfish Bed' at Eype, UK. Coin diameter = 23.4mm. File:Palaeocoma egertoni.jpg|''Palaeocoma milleri'' </gallery>
== References == {{Reflist}}
{{Taxonbar|from=Q4445903}}
Category:Brittle star genera Category:Prehistoric Asterozoa genera Category:Jurassic echinoderms Category:Triassic echinoderms Category:Prehistoric echinoderms of Europe