Species

Sulcolithos variabilis Knaust, 2020

Taxon description

Knaust, 2020a

Diagnosis. Grooves unbranched or with short acorn-, bulbor lance-shaped side-branches. Description. The holotype and paratypes occur on the upper bedding plane of a micritic limestone bed (ca. 10 cm thick) with an area of ca. 430 cm2 . The bedding plane contains various sharply outlined burrows that document frm- to hardground conditions and displays over a dozen of grooves assignable to S. variabilis. The grooves are associated with several shallow pits with irregular elliptical outline and with similar dimensions. Moreover, numerous smaller pits with an elongate, elliptical or curved outline are scattered on the surface. Some circular apertures belong to tubular shafts ca. 2 mm in diameter as parts of Trypanites weisei Mägdefrau, 1932.

Synonymy list
2010     non Sulcolithus variabilis — Vinn & Wilson , fig. Fig. 3
2014     non Sulcolithus variabilis — Vinn et al.
2019     non Sulcolithus variabilis — Toom et al. , fig. fig. 6a
2019     Sulcolithus variabilis — Toom et al. , fig. Figs 6C,I
2020     Sulcolithos variabilis isp. nov. — Knaust , fig. Fig. 2
2024     Sulcolithos variabilis Knaust, 2020 — Knaust & Schnick , pp. 8, fig. 4G–I
Selection of related publications
Knaust, D. 2020. Sulcolithos variabilis igen. et isp. nov.: grooves on firm and hard bedding surfaces. Paläontologische Zeitschrift 94, 1, 195-206. DOI:10.1007/s12542-019-00464-z
Knaust, D., Dorador, J., Rodríguez-Tovar, F. J. 2020. Burrowed matrix powering dual porosity systems – A case study from the Maastrichtian chalk of the Gullfaks Field, Norwegian North Sea. Marine and Petroleum Geology 113, 104158. DOI:10.1016/j.marpetgeo.2019.104158
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Classification
Organism groupBiota
Ichnofossil groupIchnofossils
Bioerosional trace fossils
GenusSulcolithos
Speciesvariabilis
References based on distribution