Tremichnus paraboloides Brett, 1985
Synonymy
| 2022 | Tremichnus paraboloides | Thomka, Vinn & Toom | | 2 | Thomka et al., 2022a |
| 2017 | Oichnus paraboloides Bromley, 1981 | Donovan & Pickerill | 828 | | Donovan & Pickerill, 2017 |
| 2015 | Tremichnus paraboloides Brett, 1985 | Wisshak et al. | 449 | | Wisshak et al., 2015 |
| 1989 | Balticapunctum inchoatus Rozhnov, isp. nov. | Rozhnov | 53 | 2:1-2 | Rozhnov, 1989 |
| 1985 | Tremichnus paraboloides n. ichnosp. | Brett | 627 | 1, 2 | Brett, 1985 |
| 1985 | Tremichnus minutus n. isp. | Brett | 629 | 4, 5 | Brett, 1985 |
| 1985 | Tremichnus cysticus n. isp. | Brett | 628 | 3, 4 | Brett, 1985 |
Type specimens
Descriptions and remarks
Diagnosis: Pits, circular, regularly and smoothly parabolic in cross section; about as deep as wide (depth/diameter ratio: 0.9); ranging in size from 0.1-3.6 mm in diameter (X = 0.95 mm, SD = 0.65, N = 529 pits); up to 100 pits of varying size may occur on a single calyx. Pit apertures sharply demarcated, flush; never beveled or surrounded by a raised rim or gall-like outgrowth, pits rarely associated with vague swelling of the underlying stereom; pits frequently intersecting at borders.
Occurrences
Specimens with images (2)
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 |