†Helmersenia Pander 1861 (lamp shell)
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Lingulata - Siphonotretida - Siphonotretidae
Parent taxon: Siphonotretidae according to A. Williams et al. 2000
See also Holmer 1989, Popov and Nolvak 1987 and Sepkoski 2002
Sister taxa: Acanthambonia, Acanthamboniinae, Alichovia, Celdobolus, Chilcatreta, Cyrbasiotreta, Eosiphonotreta, Karnotreta, Mesotreta, Multispinula, Nushbiella, Oaxaquiatreta, Orbaspina, Schizambon, Schizamboninae, Siphonobolus, Siphonotreta, Siphonotretella
Subtaxa: none
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Ordovician of Estonia (3 collections), the Russian Federation (3)
• Cambrian of Estonia (1)
Total: 7 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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