Porcupinella tasmanica sp. nov. Micrographs of rachis details A view of the distal portion of the rachis (CASIZ 228436), showing placement of a zone of siphonozooids on the lateral side of the rachis between the terminal and lateral autozooids. The axis is visible just below the surface of rachis B view of the distal terminus of the rachis (CASIZ 228435), showing the axis visible just below the surface of the rachis. A zone of siphonozooids is apparent on the lateral edge of the rachis, between the terminal and lateral autozooids C View of the distal terminal portion of the rachis (CASIZ 228436), showing the terminal autozooid, a whorl of three subtending lateral autozooids, which are in turn subtended by a pair of lateral autozooids. Abbreviations: a – axis; la – lateral autozooid; p – pair of lateral autozooids; r – rachis; s – siphonozooids; ta – terminal autozooid; w – whorl of three lateral autozooids. Scale bar: 4 mm (A); 3 mm (B); 5 mm (C).