Gastrochaenolites oelandicus Ekdale et Bromley, 2001

Taxon description

Ekdale & Bromley, 2001b

Diagnosis. – Gastrochaenolites with an irregular vaselike shape that has a roughly circular cross-section throughout the length of the structure. Aperture is narrow. Proximal (upper) portion of the structure is long and neck-like. Diameter of the structure expands downward from the neck and then contracts again to give the main part of the structure an irregularly ovoidal form. Distal (basal) portion of the structure is irregular in shape and is tapering in most cases but may be Ž at in others.

G. oelandicus resembles the amphora-shaped ichnospecies Amphorichnus papillatus Ma¨nnil, 1966b, which was described from lower Ordovician strata in Estonia, but G. oelandicus lacks the characteristic nipple-like projection at the bottom of the trace fossil, which Maännil (1966b) asserted to be diagnostic of A. papillatus. Most importantly, A. papillatus clearly is a burrow, not a boring.

Type specimen data
: Geological Museum, University of Copenhagena MGUH 25740 , , ()
Synonymy list
2001     Gastrochaenolites oelandicus ichnosp. nov. — Ekdale & Bromley, pp. 11, fig. fig. 1-6
2009     Gastrochaenolites oelandicus (Ekdale et Bromley, 2001) — Koromyslova, pp. 157
2010     Gastrochaenolites oelandicus — Dronov, pp. 31-32
2010     Gastrochaenolites oelandicus — Vinn et Wilson, pp. 3
2013     Gastrochaenolites oelandicus — Knaust & Dronov, pp. 270-271, fig. 3e
Selection of related publications
Toom, U., Vinn, O., Hints, O. 2019. Ordovician and Silurian ichnofossils from carbonate facies in Estonia: A collection-based review. Palaeoworld 28, 1-2, 123-144. DOI:10.1016/j.palwor.2018.07.001
Knaust, D., Dronov, A. 2013. Balanoglossites ichnofabrics from the Middle Ordovician Volkhov formation (St. Petersburg Region, Russia). Stratigraphy and Geological Correlation 21, 3, 265-279. DOI:10.1134/S0869593813030040
Dronov, A. V. 2010. Morphological variations of vertical borings and burrows from the Ordovician of East Baltic: ichnotaxonomical implications. IV Workshop on Ichnotaxonomy. Abstracts, pp. 31-32.
Koromyslova, A. V., Fedorov, P. V., Ershova, V. B. 2009. New records of bryozoans from the Lower Ordovician of the Leningrad Region and intercolonial variability in Esthoniopora lessnikowae (Modzalevskaya). Paleontological Journal 43, 2, 153-161. DOI:10.1134/S0031030109020051
Ekdale, A. A., Bromley, R. G. 2001. A day and a night in the life of a cleft-foot clam: Protovirgularia-Lockeia-Lophoctenium. Lethaia 34, 2, 119-124. DOI:10.1080/00241160152418410