Substratum and morphometric relationships in the bryozoan genus Odontoporella, with a description of a new paguridean-symbiont species from New Zealand.
Zoolog Sci
; 24(1): 47-56, 2007 Jan.
Article
em En
| MEDLINE
| ID: mdl-17409716
Members of the bryozoan family Hippoporidridae have frequently been found encrusting gastropod shells inhabited by hermit crabs, with which they appear to enter into a symbiotic relationship-shells occupied by hermits may in some species have a tubular extension of the encrusting bryozoan from the shell opening, induced by the presence of the crab. Such colony growth is characteristic of some species of Hippoporidra Canu and Bassler and Odontoporella Héjjas. The type species of Odontoporella, O. adpressa (Busk), has been attributed a nominal distribution from Chiloe Island, Chile (the type locality), to the Falkland Islands, New Zealand, and New Caledonia. In New Zealand, colonies are relatively easily obtainable from some localities, so a study was undertaken to ascertain substratum and morphometric relationships across the range of distribution of the species, using museum specimens and, where possible, fresh material. It became clear that the New Zealand population constitutes a separate species, here named O. bishopi n. sp., in which the orifice is proportionately larger than in O. adpressa. In contrast to O. adpressa, which settles on a range of substrata, O. bishopi preferentially settles on gastropod shells occupied by hermit crabs (mostly Paguristes setosus (H. Milne Edwards)) and shows sexual dimorphism at the level of the polypide. Male polypides not only have modified lophophores but also reduced guts.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Briozoários
/
Meio Ambiente
Limite:
Animals
País/Região como assunto:
America do sul
/
Chile
/
Oceania
Idioma:
En
Revista:
Zoolog Sci
Assunto da revista:
BIOLOGIA
Ano de publicação:
2007
Tipo de documento:
Article
País de publicação:
Japão