First record of Euborlasia nigrocincta Coe, 1940 (Nemertea: Heteronemertea) from the western Pacific

Hiroshi Kajihara,Eijiroh Nishi

doi:10.15560/9.4.826

Abstract

The heteronemertean Euborlasia nigrocincta Coe, 1940 was previously known exclusively from the eastern Pacific. A specimen collected on the Izu Peninsula, Honshu, Japan, herein identified as E. nigrocincta, represents the first record of the species from the western Pacific, increasing the western extent of the species’ known range by more than 8300 km and indicating an amphi-Pacific distribution

Highlights

From the original color illustration by Coe (1940), the species is readily identifiable by its characteristic body coloration in life; its internal anatomy is known only from the Chilean material (Friedrich 1970)
Based on a single individual found in Japan, we report the first record of E. nigrocincta from the western Pacific (Figure 1)
As in the Chilean material, the stomach–intestine junction in ZIHU 4368 from Japan is surrounded by circular muscles (Figure 4)

Summary

Introduction

Up to 50–70 cm in body length, individuals of E. nigrocincta live in clay or under stones on sandy substrates from the intertidal zone to 30 m depth (Coe 1940; 1944; Friedrich 1970). From the original color illustration by Coe (1940), the species is readily identifiable by its characteristic body coloration in life; its internal anatomy is known only from the Chilean material (Friedrich 1970). Based on a single individual found in Japan, we report the first record of E. nigrocincta from the western Pacific (Figure 1).

Results

Conclusion