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Eisenackisyrinx curvatus Mierzejewski, 1986 - a Chitinozoa-like microfossil

compiled by

Countess Maja Anna Korwin-Kossakowska
SEM micrograph of Eisenackisyrinx curvatus

Based on:

Mierzejewski, P.  1986. Ultrastructure, taxonomy and affinities of some Ordovician and Silurian organic microfossils. - Palaeontologia Polonica 47, 129-220.

See also related pages:

Enigmatic organic microfossils - Ordovician egg capsules of molluscs ?
Ultrastructure of Lagenochitina esthonica (Eisenack)
Helicotubulus Mierzejewski & Kulicki, 2003, an epibiont on Mastigograptus
Cyathochitina campanulaeformis (Eisenack 1931) from the Ordovican of Estonia
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Edited by
Piotr Mierzejewski, the Count of Calmont and Zaklad Paleobiologii, Warszawa
Under the Auspices of The Free Rosicrucian University.
Per Benedictionem Rosae Crucis
Non Nobis, Domine, Non Nobis,
Sed Nomini Tuo Da Gloriam
Eisenackisyrinx curvatus is an organic microfossil known only from the Ordovician erratic boulders of Baltic origin. Its systematic position is unclear.

Mierzejewski (1986, p. 198) described it as follows:

"Strongly bent irregular tubes of black, glittering opaque periderm. Tubes about 100-210 micrometers in diameter, narrowing to 30-50 micrometers at both ends, with maximum length over 2 mm."

Type horizon: Llanvirn (
Eoplacognathus pseudoplanus Zone).