Tubulohyalichnus spiralis McLoughlin, Furnes, Banerjee, Muehlenbachs, et Staudigel, 2009
Synonymy
| 2009 | Tubulohyalichnus spiralis isp. nov | McLoughlin, Furnes, Banerjee, Muehlenbachs & Staudigel | 166 | 5 | McLoughlin et al., 2009 |
Type specimens
Descriptions and remarks
Diagnosis. Unbranched tubes with a coiled or helical axis (Fig. 5), with up to 12 whorls (i.e. complete rotations), but they normally show fewer than this and may be either sinistrally or dextrally coiled. Tubulohyalichnus spiralis isp. nov. may show a linear or curved growth axis with the spacing and diameter of the whorls changing along its length.
Differential diagnosis. The only tubular ichnotaxa in volcanic glass that has a helical axis
Occurrences
Browse Categories of Architectural Design (CADs):
Borings with elliptical to sub-rectangular cross sections | Branched tubular borings | Camerate boxwork borings | Camerate network borings | Circular holes and pit-shaped borings | Clavate-shaped borings | Cylindrical vertical to oblique borings | Dendritic and rosetted borings | Elongate or branched attachment bioerosion traces | Fracture-shaped bioerosion traces | Globular to spherical borings | Groove bioerosion traces | Multiple attachment bioerosion traces | Non-camerate boxwork borings | Non-camerate network borings | Pouch borings | Radial borings | Single circular to tear-shaped attachment bioerosion traces | Spiral borings | Trackways and scratch imprints | U-shaped borings | Winding borings |