Linked Life Data

15352200

Source:http://linkedlifedata.com/resource/pubmed/id/15352200

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2004-9-7
pubmed:abstractText
In Japan Pseudopythina tsurumaru is an up to 10.8 mm-long commensal of the burrowing sea cucumber Protankyra bidentata, whereas in Hong Kong the same species is smaller and associated with the crab Hexapus anfractus, itself a commensal of P. bidentata. Japanese P. tsurumaru is a hermaphrodite tending towards protogyny maturing to a female when > or = 7 mm, and entering the hermaphroditic condition when > or = 9 mm long. In addition to normal euspermatozoa, the species produces 30-32 microm long and 7 x 8 microm broad spindle-shaped paraspermatozoa provided with a conical acrosome, a nucleus, and a bundle of approximately 15-16 flagella issuing from the head region. Paired pouch-formed seminal receptacles normally occur in bivalves > or = 6 mm. Bulk sperm transfer presumably takes place by way of spermatozeugmata formed by the two types of sperm cells. Exogenous euspermatozoa attach to particular nonepithelial cells that occupy the interior of the receptacles. These cells, together with their associated sperm, are probably released as syncytial sperm-carrying bodies into the suprabranchial chamber, where the ova are fertilized.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0362-2525
pubmed:author
pubmed:copyrightInfo
2004 Wiley-Liss, Inc.
pubmed:issnType
Print
pubmed:volume
262
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
407-20
pubmed:dateRevised
2010-12-1
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Morphology, structure of dimorphic sperm, and reproduction in the hermaphroditic commensal bivalve Pseudopythina tsurumaru (Galeommatoidea: Kellidae).
pubmed:affiliation
Department of Zoomorphology, Zoological Institute, Copenhagen University, DK-2100 Copenhagen Ø, Denmark. jlutzen@zi.ku.dk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't