Helcionopsis reticulatus
Encyclopedia
Helcionopsis reticulatus is an extinct species of paleozoic monoplacophora
n in the family Tryblidiidae
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Monoplacophora
Monoplacophora, meaning "bearing one plate", is a polyphyletic class of mollusks with a cap-like shell, living on the bottom of deep sea. Extant representatives were unknown until 1952; previously they were known only from the fossil record.- Definition :...
n in the family Tryblidiidae
Tryblidiidae
Pilina is an extinct family of paleozoic monoplacophorans in the superfamily Tryblidioidea.- Genera :Genera in the family Tryblidiidae include:* Tryblidium Lindström, 1880...
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