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Reproductive biology of a new hesionid polychaete from the Great Barrier Reef

Journal article
Authors Fredrik Pleijel
G. W. Rouse
Published in Biological Bulletin
Volume 208
Issue 1
Pages 69-76
ISSN 0006-3185
Publication year 2005
Published at Department of Marine Ecology
Pages 69-76
Language en
Links <Go to ISI>://000227140600010
Subject categories Ecology

Abstract

We describe Lizardia hirschi, a new hesionid genus and species, from shallow water on the Great Barrier Reef. It is characterized by small size (maximally around 2 mm. long) and by males with paired penes on the last segment or the pygidium. The sperm are elongated, with a conical acrosome; extended, cylindrical nucleus; and three mitochondria. The females have three to four pairs of eggs in segments 10-13, up to 150 mum in diameter. The female reproductive system consists of spermathecae, situated in the notopodia of segments 10-12, and oviducts opening ventrally on segment 11. Fertilization may be internal. The female (but not the male) reproductive system appears to be homologous to that in another small hesionid, capricornia. The phylogenetic position of L. hirschi within Hesionidae is currently uncertain due to the retention of many apparently larval features in the adults.

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