Species

Dipatulichnus rotundus Nielsen et Nielsen, 2001

Type specimen data

holotype: Geological Museum of the University of Copenhagen ; MGUH 2477; Great Australian Bight; Holocene

Reference:

Nielsen, K. S. S., Nielsen, J. K. 2001. Bioerosion in Pliocene to Late Holocene tests of benthic and planktonic foraminiferans, with a revision of the ichnogenera Oichnus and Tremichnus. pp. 99-116. DOI:10.1080/10420940109380178

Taxon description

Wisshak et al., 2019a

Type predation, substrate calcareous, tracemaker unknown.

Blissett & Pickerill, 2007

Description– Pairs of closely spaced, sub-circular, sub-cylindrical unconnected holes c. 400 μm apart. The diameters, averaging 119 μm, of these openings are constant and perpendicular to the substrate surface.

Remarks– The difficultly in isolating this ichnospecies is the similarity of each of the cylindrical-like ‘holes’ to Oichnus simplex Bromley, 1981, and the semi-interpretive aspect of one of the diagnostic features as it relates to proximity of these biogenic holes.

Nielsen & Nielsen, 2001

Diagnosis. Pair of biogenic holes, unconnected, but situated in the same skeletal substrate. Each hole has a simple cylindrical form, oriented perpendicular to the substrate surface. Both external and internal openings are sharp and circular in outline.

Synonymy list

2001 Dipatulichnus rotundus isp. nov. — Nielsen & Nielsen , pp. 111, fig. 3A-D, 5

2007 Dipatulichnus rotundus Nielsen & Nielsen, 2001 — Blissett & Pickerill , pp. 84, fig. 2:1

2020 Dipatulichnus rotundus Nielsen & Nielsen, 2001 — Baldanza, Bizzarri, Posati, Ravoni , pp. 12, fig. 6h

Selection of related publications

Blissett, D. J., Pickerill, R. K. 2007. Systematic ichnology of microborings from the Cenozoic White Limestone Group, Jamaica, West Indies. Scripta Geologica 134, 77-108.

Classification

Organism group	Biota
Ichnofossil group	Ichnofossils
	Bioerosional trace fossils
Ichnofamily	Oichnidae
Genus	Dipatulichnus
Species	rotundus

References based on distribution

Blissett & Pickerill, 2007 Riverhead old bauxite quarry Eocene
Nielsen & Nielsen, 2001 Great Australian Bight Holocene