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| Home >> Products >> Taxonomic descriptions >> Heterothyonidae | |||
| | HeterothyonidaePawson, 1971a 1 Genus; 4 species Body U-shaped, completely invested in imbricating plates. Calcareous ring simple; radial pieces with short posterior prolongations. Body wall deposits plates without spires and cups. (Pawson, 1970) |
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