Diplocraterion parallelum Torell, 1870
Schlirf, 2011
Emended diagnosis: Vertical Diplocraterion with parallel limbs and a width/length ratio below 0.5.
Schlirf, 2005
Emended diagnosis: Vertical, U-shaped, single-spreite burrows; spreite may be unidirectional or bidirectional, generally continuous, rarely discontinuous. Limbs unlined and smooth, or with bioglyphs (longitudinal or transverse ridges and grooves). Limbs either parallel, or diverging upward or downward; top of limbs sometimes with funnel shaped opening.
Gaillard & Racheboeuf, 2006
Discussion.--Following the proposition of Fürsich (1974), the observed burrows must be referred to D. parallelum and the trace probably corresponds to a dwelling burrow of a suspension-feeding animal, possibly a small crustacean. D. parallelum is very abundant in sandy beds showing ripple marks on their upper surface. Here, the trace appears as a typical dumbbell-shaped convex epirelief showing a preferential orientation to the current (Fig. 10). This observation supports the suspension-feeding hypothesis.
Dam, 1990a
Description: Vertical U-shaped burrows preserved in full relief with concave-upward spreiten; spreiten is enhanced by lining of the walls; limbs of burrow walls are parallel. Both retrusive and protrusive forms occur and few specimens display both forms; bottom of burrows are semicircular or more rarely flattened; burrows are 8-25 mm in tube diameter and 25-180 mm in distance between limbs; depth of burrows is 25-510 mm; smaller specimens occur in large numbers in distinct horizons, while larger specimens mostly occur solitarily.
organismirühm | Biota |
ihnorühm | Ichnofossils |
Bioturbation trace fossils | |
sugukond | Rhizocoralliidae |
perekond | Diplocraterion |
liik | biclavatum |
habicki | |
helmerseni | |
luniforme | |
morgani | |
parallelum | |
polyupsilon | |
saxicavum | |
ultimum | |
yoyo |
- Jensen, 1997 Alam-Kambrium (endine liigestus)
- Palij et al., 1979 Narva-Ivangorodi paljand, Leningradi oblast Alam-Kambrium (endine liigestus)
- Orłowski & Źylińska, 1996 Püharisti mäed Alam-Kambrium (endine liigestus)
- Orłowski & Źylińska, 1996 Wiśniowka Duża kivimurd Ülem-Kambrium (endine liigestus)
- Müürisepp, 1958b Aseri paekallas Tiskre kihistu
- Müürisepp, 1958b Kotlõ, Leningradi oblast Tiskre kihistu
- Clausen & Vilhjálmsson, 1986 Broens Odde paljand, Bornholm Alam-Kambrium (endine liigestus)
- Bromley & Uchman, 2003 Korsodde, Bornholm Alam-Juura