New camerate crinoid genera from the Upper Ordovician (Katian) of Estonia: evolutionary origin of family Opsiocrinidae and a phylogenetic assessment of Ordovician Monobathrida
Cole, Selina R.
;
Toom, Ursula
Journal of systematic palaeontology
2019
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p. 597-611 : ill
https://doi.org/10.1080/14772019.2018.1447519
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Site-selectivity of symbiotic (parasitic?) pits in crinoid column material from the middle Silurian (Wenlock: Sheinwoodian) of western Estonia
Thomka, James R.
;
Vinn, Olev
;
Toom, Ursula
Ichnos : an international journal for plant and animal traces
2022
/
p. 71-75 : ill
https://doi.org/10.1080/10420940.2022.2047038
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