Order BONELLIOINEA Saxena, 1983
Metabonellia haswelli [I. Grant, in Edmonds 2000]
© Copyright I. Grant.
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Order BONELLIOINEA Saxena, 1983
Introduction
In the Bonellioinea, the longitudinal musculature lies between the outer circular and inner oblique layers. Sexual dimorphism is marked, and the male being reduced to a small, planariform to nematoform animal that lives in or on the female. The female has a closed vascular system. One or two nephridia are present and anal vesicles are usually dendritic or arborescent and bear stalked funnels. There is only one family, the Bonelliidae.
General References
Edmonds, S.J. 2000. Phylum Echiura. pp. 353-374 in Beesley, P.L., Ross, G.J.B. & Glasby, C.J. (eds). Polychaetes & Allies: The Southern Synthesis. Fauna of Australia Vol. 4A Polychaeta, Myzostomida, Pogonophora, Echiura, Sipuncula. Melbourne : CSIRO Publishing Vol. 4 Part A xii 1-465 pp.