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Reproduction and Larval Morphology of Five Ophryotrocha Species (Poly cha eta, Dorvilleidae)
Author(s) -
Åkesson Bertil
Publication year - 1974
Publication title -
zoologica scripta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 64
eISSN - 1463-6409
pISSN - 0300-3256
DOI - 10.1111/j.1463-6409.1974.tb00746.x
Subject(s) - biology , hermaphrodite , larva , reproduction , morphology (biology) , genus , zoology , chromosome number , type (biology) , ecology , chromosome , karyotype , gene , genetics
Reproduction and larval morphology of Ophryotrocha puerilis, O. labronica, O. nologlandulata, O. hartmanni , and O. bacci are described. All species have been cultivated in the laboratory. The morphology of adults and larvae is uniform, but there is a considerable variation in the shape of the egg masses. The interrelations between members of the genus Ophryotrocha are discussed: Gonochoric species have the same type of egg mass and the same chromosome number. O. puerilis is unique as a protandrous hermaphrodite. Among contemporary hermaphrodites with male and female segments, fusiform egg masses with a rigid surface are correlated with one larval type, gelatinous egg masses with another larval type.