NEW-ZEALAND NEMERTINES FROM KELP HOLDFASTS - HETERONEMERTINEA .1. ADENORHAGAS-AURANTIAFRONS GEN-N, SP-N

A small heteronemertine with a brilliant orange cap at the tip of the head was found in kelp holdfasts at Kaikoura and Leigh, New Zealand. The species is characterised by presence of a large number of gland cells in the lateral cephalic fissures, extensive development of sensory cells posteriorly in the cephalic fissures, and the absence of an excretory system. The genus Adenorhagas is erected to contain this new species. It differs from Micrura in its absence of longitudinal muscles between the rhynchocoel and foregut, and the presence of two longitudinal muscle layers separated by a circular muscle layer with one muscle cross in the probosicis.