Species

Diplocraterion helmerseni (Öpik, 1929)

Tyyppilajitiedot
holotype: TUG ; 1144-1; Narva Joaoru outcrop; Tiskre Formation
Reference:
Öpik, A. 1929. Studien über das estnische Unterkambrium (Estonium), I-IV. pp. 1-56.
Taxon description

Rajkonwar et al., 2013

Description: Vertical U-shaped burrow with protrusive spreiten and broad base; tubes are not parallel to each other and their diameter is also variable (0.9 to 1.2 cm). The burrow penetrates 12 cm in the sediment; diameter of the tube increases downward and their maximum diameter (1.2 cm) was observed at the base of the burrow. Burrow filled sediments are darker than the host sediments but spreiten is light coloured.

Synonyymit
1929     Corophioides Helmerseni n. sp. — Öpik , pp. 33, fig. 4
1974     Diplocraterion helmerseni (Õpik 1929) — Fürsich , pp. 959, fig. text fig.5
1998     Diplocraterion helmerseni (Õpik 1929) — Stanley & Pickerill , pp. 14, fig. 4:2
2013     Diplocraterion helmerseni Õpik 1929 — Rajkonwar et al. , pp. 23, fig. 2f
Aiheeseen liittyvät julkaisut
Mens, K. A., Pirrus, E. A. 1977. Stratotypes of the Cambrian Formations of Estonia. pp. 1-68. Valgus.
Öpik, A. 1929. Studien über das estnische Unterkambrium (Estonium), I-IV. Tartu Ülikooli Geoloogia Instituudi Toimetused 15, 1-56.
Loading...
Luokittelu
Organism groupBiota
Ichnofossil groupIchnofossils
FamilyRhizocoralliidae
GenusDiplocraterion
Speciesbiclavatum
helmerseni
luniforme
morgani
parallelum
polyupsilon
ultimum
yoyo
Levinneisyys ja viitteet