Porina tubulifera is found in Tertiary of southeastern Australia.
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Part of a colony lobe, width about 1 mm. Secondary orifices are visible: the primary orifices are hidden at the lower end of long tubular peristomes. A round spiramen opens proximal to the secondary orifice; this leads to an opening in the peristome above the proximal margin of the primary orifice. Small avicularia are visible at the margins of the secondary orifices. |
Original description: Porina gracilis var. tubulifera MacGillivray, 1895
Locality: "Schnapper Point" (Balcombe Bay), Victoria, Australia. Miocene Balcombian (Langhian)
Type specimen: MOV P14538
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