Wikipedia

Plumulites

Plumulites is an extinct genus of machaeridians, extinct annelid group.[1]

Plumulites
Temporal range: Tremadocian–Middle Devonian
A digital reconstruction of Plumulites bengstoni
Scientific classification
Kingdom:
Animalia
Phylum:
Annelida
Order:
Machaeridia
Family:
Plumulitidae
Genus:
†Plumulites
Type species
Plumulites canadensis
Woodward, 1889
Species

See text

Description edit

Plumulites is normally small animal, for example complete specimen of P. canadensis reached only 16.5 millimetres (0.65 in), and P. bengtsoni being 28 millimetres (1.1 in).[1][2] However, several largest specimens probably reached around 15 centimetres (5.9 in), making Plumulites largest machaeridians ever known.[3][4]

Fossils of Plumulites were mostly known from isolated sclerites, and originally considered as arthropod or an echinoderm. However, complete sclerite assemblages of P. richorum described in 1979 has shown that this animal is more likely to be annelid worm, the group which includes modern-day earthworm, leech and bristleworm.[5]

According to complete specimens, this animal is surrounded by pairs of outer and interior shell plates.[1][2][5][6] Some of anterior outer and interior shell plates different in shape.[6] Specimen of A. bengtsoni shows soft tissue including parapodia and chaetae.[2]

Taxonomy edit

Preservation of jaw element of A. bengtsoni leads conclusion that machaeridians should be placed within the crown group of Phyllodocida.[7]

Species edit

As of 1929, more than 20 species have been described.[8] Subsequent studies have described many more species.

  • P. canadensis Woodward, 1889 (type) Ottawa, Canada, Katian (Upper Ordovician)[1][8]
  • P. australis Talent, 1963 [9]
  • P. bengtsoni Vinther, Van Roy & Briggs, 2008 Fezouata Formation, Morocco, Upper Tremadocian (Lower Ordovician)[2]
  • P. bohemicus Barrande, 1868 Bohemia, Czech Republic, Lower Ordovician[8]
  • P. chikunensis Kobayashi, 1934 Chikunsan shale (Jigunsan Formation), South Korea, Llandeilian (Middle Ordovician)[10][11]
  • "P". clarki Shaw, 1966 (=?P. mobergi Clark, 1924) Highgate Formation, Vermont, USA, Lower Ordovician[12]
  • P. compar Barrande, 1872 Bohemia, Czech Republic, Lower Ordovician[8]
  • P. contarius Barrande, 1872 Bohemia, Czech Republic, Lower Ordovician[8]
  • P. dalecarlicus Moberg, 1914 Scania, Sweden, Middle Ordovician[8]
  • P. delicatus Barrande, 1872 Bohemia, Czech Republic, Lower Silurian[8]
  • P. devonicus J. M. Clarke, 1882 Hamilton group, New York, USA, Middle Devonian[8]
  • P. discretus Barrande, 1872 Bohemia, Czech Republic, Lower Silurian[8]
  • P. esthonicus Withers, 1921 Jewe Station, Esthonia, Middle Ordovician[8]
  • P. eueides Högström et al., 2008 Boda Limestone, Siljan district, Sweden, Lower Ordovician (Katian–Hirnantian)[3]
  • P. folliculum Barrande, 1868 Bohemia, Czech Republic, Lower Ordovician[8]
  • P. fraternus Barrande, 1872 Bohemia, Czech Republic, Middle Ordovician[8]
  • P. gracillimus Ringueberg, 1888 Rochester Shale, New York, USA, Middle Silurian[8]
  • P. gumunsoensis Choi & Kim, 1989 Dumugol Formation, South Korea, Upper Tremadocian[13]
  • P. kutscheri Schrank, 1978 Germany, Upper Wenlock Epoch (Silurian)[2]
  • P. lamonti Candela & Crighton, 2017 Law Linn Formation, Pentland Hills, Scotland, Telychian (Silurian)[6]
  • P. llanvirnensis Withers & Henry, 1926 Pembrokeshire, Wales, United Kingdoms, Skiddavian (Lower Ordovician)[8]
  • P. malayensis Kobayashi & Hamada, 1976 Pulau Langgon, Langkawi Islands, Malaysia, Upper Ordovician[10]
  • P. minumus Barrande, 1872 Bohemia, Czech Republic, Lower Silurian[8]
  • P. mitchelli R. Etheridge, 1890 Bowning Creek, New South Wales, Australia, ?Wenlock Epoch (Silurian)[8]
  • P. mobergi T. H. Clark, 1924 Quebec, Canada, Lower Ordovician[8]
  • P. ornatus Chapman, 1910 Victoria, Australia, Melbournian (Silurian)[8]
  • P. peachi Nicholson & Etheridge, 1880 Ayrshire, Scotland, Ashgillian (Upper Ordovician)
  • P. primus Kobayashi, 1934 Dumugol Formation, South Korea, Upper Tremadocian[10][13]
  • P. pygmaeus Moberg, 1914 Dalarna, Sweden, Lower Silurian[8]
  • P. rastritum Moberg, 1914 Dalarna, Sweden, Lower Silurian[8]
  • P. regius Barrande, 1872 Bohemia, Czech Republic, Middle-Upper Ordovician[8]
  • P. richorum Jell, 1979 Humevale Formation, Victoria, Australia, Early Devonian[5]
  • P. ruskini Lamont, 1978 Wether Law Linn Formation, Pentland Hills, Scotland, Telychian (Silurian)[14]
  • P. scoticus R. Etheridge, 1878 Balclatchie group, Ayrshire, Scotland, Caradocian (Upper Ordovician)[8]
  • P. tafennaensis Chauvel, 1967 Morocco, Caradoc (Upper Ordovician) and Tafilalt Biota, Morocco, Katian (Upper Ordovician)[2][4]
  • P. törnquisti Moberg, 1914 Dalarna, Sweden, Middle Ordovician[8]
  • P. trentonensis Withers & Henry, 1926 Middle Trenton Beds, New York, USA, Middle Ordovician[8]
  • P. yeringiae Chapman, 1910 Victoria, Australia, Yeringian (Silurian)[8]

References edit

  1. ^ a b c d Jakob Vinther & David Rudkin (2010). "The first articulated specimen of Plumulites canadensis (Woodward, 1889) from the Upper Ordovician of Ontario, with a review of the anterior region of Plumulitidae (Annelida: Machaeridia)". Palaeontology. 53 (2): 327–334. Bibcode:2010Palgy..53..327V. doi:10.1111/j.1475-4983.2010.00938.x.
  2. ^ a b c d e f Vinther, Jakob; Van Roy, Peter; Briggs, Derek E. G. (2008). "Machaeridians are Palaeozoic armoured annelids". Nature. 451 (7175): 185–188. Bibcode:2008Natur.451..185V. doi:10.1038/nature06474. ISSN 1476-4687. PMID 18185586. S2CID 4401508.
  3. ^ a b Högström, Anette E.S.; Ebbestad, Jan Ove R.; Suzuki, Yutaro (2009). "Armoured annelids and molluscs from the Upper Ordovician Boda Limestone, central Sweden". GFF. 131 (3): 245–252. Bibcode:2009GFF...131..245H. doi:10.1080/11035890903189801. ISSN 1103-5897. S2CID 140672683.
  4. ^ a b Lefebvre, Bertrand; Van Roy, Peter; Zamora, Samuel; Gutiérrez-Marco, Juan Carlos; Nohejlová, Martina (2022-03-31). "The Late Ordovician Tafilalt Biota, Anti-Atlas, Morocco: a high-latitude perspective on the GOBE". Geological Society, London, Special Publications. 485 (1): 5–35. Bibcode:2022GSLSP.485....5L. doi:10.1144/sp485-2022-29. ISSN 0305-8719. S2CID 247351043.
  5. ^ a b c Jell, Peter A. (1979). "Plumulites and the machaeridian problem". Alcheringa: An Australasian Journal of Palaeontology. 3 (4): 253–259. Bibcode:1979Alch....3..253J. doi:10.1080/03115517908527797. ISSN 0311-5518.
  6. ^ a b c Candela, Y.; Crighton, W. R. B. (2017-01-27). "Addenda to the record of machaeridian shell plates in the Wether Law Linn Formation (Late Llandovery), Pentland Hills, Scotland". Scottish Journal of Geology. 53 (1): 35–39. Bibcode:2017ScJG...53...35C. doi:10.1144/sjg2016-006. ISSN 0036-9276. S2CID 132750137.
  7. ^ Parry, Luke A.; Edgecombe, Gregory D.; Sykes, Dan; Vinther, Jakob (2019-07-24). "Jaw elements in Plumulites bengtsoni confirm that machaeridians are extinct armoured scaleworms". Proceedings of the Royal Society B: Biological Sciences. 286 (1907): 20191247. doi:10.1098/rspb.2019.1247. PMC 6661337. PMID 31337310.
  8. ^ a b c d e f g h i j k l m n o p q r s t u v w x y British Museum (Natural History).; History), British Museum (Natural; Withers, Thomas Henry (1926). Catalogue of the Machaeridia (Turrilepas and its allies) in the Department of Geology. London.{{cite book}}: CS1 maint: location missing publisher (link)
  9. ^ "Mindat.org". www.mindat.org. Retrieved 2022-12-17.
  10. ^ a b c Kobayashi, Teiichi; Hamada, Takashi (1976). "Occurrences of the Machaeridia in Japan and Malaysia". Proceedings of the Japan Academy. 52 (7): 371–374. doi:10.2183/pjab1945.52.371.
  11. ^ Choi, Duck Keun; Lee, Dong-Chan (1992). "PLUMULITES FROM THE JIGUNSAN FORMATION (MIDDLE ORDOVICIAN) DONGJEOM AREA, KOREA". 고생물학회지 (in Korean). 8 (1): 52–58. ISSN 1225-0929.
  12. ^ Shaw, Alan B. (1966). "Paleontology of Northwestern Vermont. XII. Fossils from the Ordovician Highgate Formation". Journal of Paleontology. 40 (6): 1312–1330. ISSN 0022-3360. JSTOR 1301947.
  13. ^ a b Choi, Duck Keun; Kim, Keon Ho (1989). "Problematic Fossils from the Dumugol Formation(Lower Ordovician), Dongjeom Area, Korea". 지질학회지 (in Korean). 25 (4): 405–412. ISSN 0435-4036.
  14. ^ Candela, Yves; Crighton, William R. B. (2015-01-23). "Revision of Plumulites ruskini Lamont, and new data from the Silurian of the Pentland Hills, Scotland". Scottish Journal of Geology. 51 (1): 31–42. Bibcode:2015ScJG...51...31C. doi:10.1144/sjg2014-053. ISSN 0036-9276. S2CID 131111779.

External links edit


 

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