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PalZ

, Volume 74, Issue 3, pp 227–238 | Cite as

Occurrence ofByroniaMatthew andSphenothallusHall in the Lower Cambrian of China

  • Mao-yan Zhu
  • Heyo Van Iten
  • Robt S. Cox
  • Yuan-long Zhao
  • Bernd-D. Erdtmann
Article

Abstract

Rare phosphatic tubular fossils from the Lower-Middle Cambrian Kaili Formation of Guizhou Province, southern China were originally identified as non-calcified algae or ‘worms’ (ScoleciellusLiu). Re-examination of these fossils indicates that specimens identified as non-calcified algae areSphenothallus taijiangensis n. sp., while specimens identified asScoleciellus belong toByronia natus (Liu).Sphenothallus taijiangensis andByronia natus from Lower Cambrian strata in the Kaili Formation are the oldest known representatives of their genera. In addition,B. natus (Liu) is the only known species ofByronia with the exception ofB. annulataMatthew (Middle Cambrian, British Columbia).

CambrovitusMao et al., a tubular fossil from Middle Cambrian strata in the Kaili Formation, originally was classified as a hyolithid. However, the discovery of a nearly complete specimen possessing an apical attachment disk shows thatCambrovitus, likeByronia andSphenothallus, probably was a thecate cnidarian polyp.

Keywords

Cambrian Ordovician Lower Cambrian Transverse Ridge Longitudinal Stria 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Kurzfassung

Seltene phosphatische röhrchenförmige Fossilien aus der unter- bis mittelkambrischen Kaili- Formation aus der Provinz Guizhou (Kiautschau) in Südchina wurden als nicht-calcifizierte Algen oder als, Würmer’ (ScoleciellusLiu) identifiziert. Eine erneute Untersuchung dieser Fossilien erwies, daß die Fundstücke, die als nicht-verkalkte Algen bestimmt wurden, zuSphenothallus taijiangensis n. sp. zu stellen sind, während jene Exemplare, die alsScoleciellus identifiziert wurden, zuByronia natus (Liu) gehören.Sphenothallus taijiangensis undByronia natus aus den unterkambrischen Schichten der Kaili-Formation sind die ältesten Vertreter dieser Gattungen.Byronia natus ist, nebenB. AnnulataMatthew (Mittelkambrium von Britisch Kolumbien), die einzige bekannte Art dieser Gattung.

CambrovitusMao et al., ein röhrchenförmiges Fossil aus den mittelkambrischen Schichten der Kaili-Formation, wurde ursprünglich zu den Hyolithiden gestellt. Die Entdeckung eines nahezu vollständigen Exemplars mit einer apikalen Haftscheibe deutet darauf hin, daßCambrovitus, ähnlich wieByronia undSphenothallus, wahrscheinlich ein thekentragender cnidarer Polyp war.

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Copyright information

© E.Schweizerbart’sche Verlagsbuchhandlung 2000

Authors and Affiliations

  • Mao-yan Zhu
    • 1
  • Heyo Van Iten
    • 2
  • Robt S. Cox
    • 3
  • Yuan-long Zhao
    • 4
  • Bernd-D. Erdtmann
    • 5
  1. 1.Nanjing Institute of Geology and PalaeontologyAcademia SinicaNanjingPeople’s Republic of China
  2. 2.Department of GeologyHanover CollegeHanoverUSA
  3. 3.Department of Geological SciencesUniversity of MichiganAnn ArborUSA
  4. 4.Guizhou Institute of TechnologyGuiyangPeople’s Republic of China
  5. 5.Bernd-D. ErdtmannTechnische Universität BerlinBerlinGermany

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