Planktonic larvae of Spiochaetopterus in the Gulf of California: New evidence that the geographic distribution of species with a long planktonic larval life is relatively restricted (Polychaeta, Chaetopteridae)

Citation
M. Bhaud et Ma. Fernandez-alamo, Planktonic larvae of Spiochaetopterus in the Gulf of California: New evidence that the geographic distribution of species with a long planktonic larval life is relatively restricted (Polychaeta, Chaetopteridae), OPHELIA, 52(1), 2000, pp. 65-76
Citations number
43
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Aquatic Sciences
Journal title
OPHELIA
ISSN journal
0078-5326 → ACNP
Volume
52
Issue
1
Year of publication
2000
Pages
65 - 76
Database
ISI
SICI code
0078-5326(200003)52:1<65:PLOSIT>2.0.ZU;2-N
Abstract
Polychaete larvae were sorted fi-om a collection of 116 zooplankton samples taken in 76 localities during the GOLCA 84-04 cruise in March-April 1984. Two morphologies were identified in the Chaetopreridae genus Spiochaetopter us: larval types I and II. The morphology of A4 setae dissected from the la rvae is compared with A4 setae of erected species from the Pacific. Larvae of Spiochaetopterus type I could belong to S. monroi. From local observatio n of adults and larvae, and comparison with the first species described in the genus: S. costarum, it appears that this species is not present in the Gulf of California. Although S. costarum was for a long time credited with a widespread distribution throughout the world because of its long plankton ic larval development, it is now acknowledged that many reported occurrence s were in-correctly attributed to S. costarum, and in consequence its speci fic area has been restricted ill recent years. This paper confirms that the setal morphology of larvae and adults is very helpful in the identificatio n of planktonic larval stages.