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==Distribution==
==Distribution==
The genus ''Palaeocoma'' was revised by Hess (1960, 1962)<ref>Hess H. (1960). Ophioderma escheri Heer aus dem unteren Lias der Schambelen (Kt. Aargau) und verwandete Lias-Ophiuren aus England und Deutschland. ''Eclogae Geologicae Helvetiae'', '''53''': 757-793.</ref><ref>Hess H. (1962). Mikropaläontologische Untersuchungen an Ophiuren II. Die Ophiuren aus dem Lias (Pliensbachien-Toarcien) von Seewen (Kt. Solothurn). ''Bericht der schweitzerischen palaeontologischen Gesellschaft'', '''55''': 609-656.</ref> and is known from the Middle Triassic ([[Ladinian]]) to the Lower Jurassic ([[Toarcian]]) with occurrences reported from the United Kingdom (Hess, 1964; Kutscher, 1996),<ref>Hess H. (1964). Die Ophiuren des englischen Jura. ''Eclogae Geologicae Helvetiae'', '''57''': 755-821.</ref><ref>Kutscher M. (1996). Echinodermata aus dem Ober-Toarcium und Aalenium Deutschlands II: ''Ophiuroidea. Stuttgarter Beiträge zur Naturkunde, serie B, Geologie und Paläontologie'', '''242''': 1-33.</ref> France (Thuy, 2011; Thuy ''et al''., 2011),<ref>Thuy B. (2011). Exceptionally well‐preserved brittle stars from the Pliensbachian (Early Jurassic) of the French Ardennes. ''Palaeontology'' '''54''' (1): 215-233. http://dx.doi.org/10.1111/j.1475-4983.2010.00981.x</ref><ref>Thuy B., Gale A. S. & Reich M. (2011). A new echinoderm Lagerstätte from the Pliensbachian (Early Jurassic) of the French Ardennes. ''Swiss Journal of Palaeontology'', '''130''': 173-185. http://dx.doi.org/10.1007/s13358-010-0015-y</ref> Luxembourg (Kutscher & Hary, 1991),<ref>Kutscher M. & Hary A. (1991). Echinodermen im Unteren Lias (''bucklandi''-und ''semicostatum''-zone) zwischen Ellange und Elvange (SE-Luxemburg). ''Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen'', '''182''': 37-72.</ref> Germany (Kutscher, 1988),<ref>Kutscher M. (1988). Zur Invertebratenfauna und Stratigraphie desoberen Pliensbachien von Grimmen (DDR), Echinodermata. ''Freiberger Forschungsheft'', C'''419''': 62-70.</ref> Switzerland (Hess, 1960, 1962), Italy (Pinna, 1985),<ref>Pinna G. (1985). Exceptional preservation in the Jurassic of Osteno. ''Philosophical Transactions of the Royal Society of London Series B, Biological Sciences'', '''311''': 171-180. https://doi.org/10.1098/rstb.1985.0149</ref> and Serbia and Montenegro (Bachmayer & Kollmann, 1968).<ref>Bachmayer F. & Kollmann H.A. (1968). Ein Ophiure aus der Trias Jugoslawiens. ''Annalen des Naturhistorischen Museums in Wien'', '''72''': 645-648.</ref>
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}}</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 |pages=173-185 |doi=10.1007/s13358-010-0015-y}}</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}}</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 |pages=171-180 |doi=10.1098/rstb.1985.0149}}</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==
==Type species==

Revision as of 15:16, 7 August 2023

Palaeocoma
Temporal range: Ladinian-Toarcian
~242–182 Ma
Palaeocoma milleri (Philips, 1829), from the Lower Jurassic (Pliensbachian) Starfish Bed, Eype, Bridport, Dorset, England. Complete specimen from the margaritatus Zone, which measures 9.5 cm (3.7") across, on matrix.
Scientific classification
Kingdom:
Animalia
Phylum:
Echinodermata
Subphylum:
Eleutherozoa
Class:
Ophiuroidea
Order:
Ophiurida
Suborder:
Ophiurina
Family:
Ophiurina incertae sedis[1]
Genus:
Palaeocoma

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.[3]

Distribution

The genus Palaeocoma was revised by Hess (1960, 1962)[4][5] and is known from the Middle Triassic (Ladinian) to the Lower Jurassic (Toarcian) with occurrences reported from the United Kingdom,[6][7] France,[8][9] Luxembourg,[10] Germany,[11] Switzerland,[4][5] Italy,[12] and Serbia and Montenegro.[13]

Type species

Palaeocoma milleri (Phillips, 1829)[14] [= 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.[15]

Synonymised names

Ophioderma carinata Wright, 1866[16]
Ophioderma egertoni (Broderip, 1840)[17]
Ophioderma gaveyi Wright, 1854[18]
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

Gallery

  • Palaeocoma milleri from the famous 'Starfish Bed' at Eype, UK. Coin diameter = 23.4mm.
    Palaeocoma milleri from the famous 'Starfish Bed' at Eype, UK. Coin diameter = 23.4mm.
  • Palaeocoma milleri
    Palaeocoma milleri

References

  1. ^ Stöhr, S., O’Hara, T., Thuy, B. (Eds), 2020. World Ophiuroidea Database. Ophioderma Müller & Troschel, 1840. Accessed through: World Register of Marine Species on 2020-11-01.
  2. ^ 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.
  3. ^ 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.
  4. ^ a b Hess, H. (1960). "Ophioderma escheri Heer aus dem unteren Lias der Schambelen (Kt. Aargau) und verwandete Lias-Ophiuren aus England und Deutschland". Eclogae Geologicae Helvetiae (in German). 53: 757–793.
  5. ^ a b Hess, H. (1962). "Mikropaläontologische Untersuchungen an Ophiuren II. Die Ophiuren aus dem Lias (Pliensbachien-Toarcien) von Seewen (Kt. Solothurn)". Bericht der schweitzerischen palaeontologischen Gesellschaft. 55: 609–656.
  6. ^ Hess, H. (1964). "Die Ophiuren des englischen Jura". Eclogae Geologicae Helvetiae. 57: 755–821.
  7. ^ Kutscher, M. (1996). "Echinodermata aus dem Ober-Toarcium und Aalenium Deutschlands II: Ophiuroidea". Stuttgarter Beiträge zur Naturkunde, serie B, Geologie und Paläontologie. 242: 1–33.
  8. ^ Thuy, B. (2011). "Exceptionally well‐preserved brittle stars from the Pliensbachian (Early Jurassic) of the French Ardennes". Palaeontology. 54 (1): 215–233. doi:10.1111/j.1475-4983.2010.00981.x.
  9. ^ Thuy, B.; Gale, A.S.; Reich, M. (2011). "A new echinoderm Lagerstätte from the Pliensbachian (Early Jurassic) of the French Ardennes". Swiss Journal of Palaeontology. 130: 173–185. doi:10.1007/s13358-010-0015-y.
  10. ^ Kutscher, M.; Hary, A. (1991). "Echinodermen im Unteren Lias (bucklandi-und semicostatum-zone) zwischen Ellange und Elvange (SE-Luxemburg)". Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 182: 37–72.
  11. ^ Kutscher, M. (1988). "Zur Invertebratenfauna und Stratigraphie desoberen Pliensbachien von Grimmen (DDR), Echinodermata". Freiberger Forschungsheft, C. 419: 62–70.
  12. ^ Pinna, G. (1985). "Exceptional preservation in the Jurassic of Osteno". Philosophical Transactions of the Royal Society of London Series B, Biological Sciences. 311: 171–180. doi:10.1098/rstb.1985.0149.
  13. ^ Bachmayer, F.; Kollmann, H.A. (1968). "Ein Ophiure aus der Trias Jugoslawiens". Annalen des Naturhistorischen Museums in Wien. 72: 645–648.
  14. ^ 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.
  15. ^ 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.
  16. ^ Wright, T. (1866). A monograph on the British fossil Echinodermata from the Oolitic formations. 2/2 On the Ophiuroidea. Paleontologr. Society: London.
  17. ^ Broderip, W. J. (1840). Description of some fossil Crustacea and Radiata, found at Lyme Regis, in Dorsetshire. Transactions of the geological Society of London, 2, 390-396.
  18. ^ Wright, T. (1854). Contributions to the Palaeontology of Gloucestershire: a description, with figures of some new species of Echinodermata from the Lias and Oolites. The Annals and Magazine of natural History, 2 (13), 376-383.
  19. ^ Herr, O. (1865). Die Urwelt der Schweiz. 1. 622 pp. Schulthess, Zürich.
  20. ^ Quenstedt, F. A. 1876. Petrefactenkunde Deutschlands: Erste Abtheilung, Vierter (4) Band, Echinodermen (Asteriden und Encriniden). 742 pp. Fues Verlag, Leipzig.
  21. ^ 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.
  22. ^ Toula, F. (1887). Über Aspidura raiblana nov. spec. Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, 96, 361-369.
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