The University of Southampton
University of Southampton Institutional Repository

Observations on the life histories of the narcomedusae Aeginura grimaldii , Cunina peregrina and Solmissus incisa from the western North Atlantic

Lucas, Cathy H. and Reed, Adam J. (2009) Observations on the life histories of the narcomedusae Aeginura grimaldii , Cunina peregrina and Solmissus incisa from the western North Atlantic Marine Biology, 156, (3), pp. 373-379. (doi:10.1007/s00227-008-1089-6).

Record type: Article


In this paper, we present evidence of direct development life cycles and brooding behaviour in two narcomedusae species in the family Cuninidae, as well as a histological description of another narcomedusan species from the family Aeginidae. Cunina peregrina were found to be brooding juveniles within the subumbrella. Brood contents varied in size and developmental stage. In addition, pairs of small white spheres enclosed within a membrane, most likely an oocyte and phorocyte (nurse cell) were observed around the stomach wall. It is suggested that two life cycles are occurring simultaneously: (1) asexual budding of actinula larvae from the parent medusa which develop into fully developed medusa; and (2) sexual reproduction producing an egg and phorocyte pair which develops into an actinula and a four-tentacle reduced medusa. In Solmissus incisa opaque spheres of various sizes were attached to the external walls of the gastric pouches. The spheres appeared to start off as a developing oocyte attached firmly to the adult, before developing into a sessile planula larva. The planula had a thick ectoderm and endoderm and was attached to the adult gastric pouches at its oral surface. This attachment appeared to pinch into the adult stomach pouch forcing some stomach tissue into the oral opening of the developing planula, possibly suggesting some nutritional aid from the adult. It is not clear whether this is a parasitism on the adult to gain nutrition or parental brood care. Nine specimens of Aeginura grimaldii were collected. White growths located on the subumbrellar surface in between the gastric pouches were found to be male gonads containing sperm. The gonads had a granular texture consisting of a lightly speckled black pigmentation, which became denser in the red subumbrella tissue. Histology revealed this to be porphyrin bodies.

Full text not available from this repository.

More information

Published date: February 2009


Local EPrints ID: 65706
ISSN: 0025-3162
PURE UUID: 3e154a20-399e-4697-9b41-8bd5569091cb
ORCID for Cathy H. Lucas: ORCID iD

Catalogue record

Date deposited: 13 Mar 2009
Last modified: 19 Jul 2017 00:32

Export record



Author: Cathy H. Lucas ORCID iD
Author: Adam J. Reed

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.