Graff L v 1886 (citation)- reports this as a species dubia. Verrill AE 1893 (citation)- p 510. dark olive green color- ova dark green- to 2 mm long by 1.5 mm broad. from Provincetwon, Massachusetts, USA at low water mark among algae- referred provisionally to Aphanostoma- resembles also certain species of Mecynostoma. Plate 42, fig 9 n-8. Graff L v 1910 (citation)- reports this as a species dubia. Graff L v 1911 (citation)- reports this as a species dubia - but belongs in Convoluta.
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