Description: L 215.8um, BR 208.4um, Isth 31.9um, L:Br 1.03. Specimens in the sample were observed having the polar lobe supporting bidentate angles as well as the single spine on either side of the apical notch. A few specimens were seen with a single spine on the polar lobe extremities. Prescott et al. (1977, p. 186) consider this form to be of uncertain rank as the spine on either side of the apical notch is a variable feature. It should be compared with M. apiculata var. fimbriata (Ralfs) Nordst., form which it differs in having less open incisions and shorter terminal teeth. (dingley 2001)

State distribution in Australia, based on available literature

new form for australia (Dingley 2001)

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