Tertiary marine prosobranchs: larval dispersal and geographic range

Simple item page
dc.contributor.authorPhillips, Susan Elizabeth Pennyen
dc.contributor.departmentGeological Sciencesen
dc.date.accessioned2014-03-14T21:42:15Zen
dc.date.adate2009-08-04en
dc.date.available2014-03-14T21:42:15Zen
dc.date.issued1993en
dc.date.rdate2009-08-04en
dc.date.sdate2009-08-04en
dc.description.abstractScheltema (1971, 1978) and others have proposed that extensive larval dispersal allows marine invertebrate species to establish great geographic ranges; several studies along a single margin of an ocean basin have supported this proposal (Shuto, 1975; Hansen, 1978). This study makes use of the fossil record to examine larval dispersal patterns on a larger geographic scale: across an entire ocean basin. Sixteen genera/subgenera of marine prosobranch gastropods were selected as the data base for the study. Eight of the genera were widely distributed (have fossil representatives on both the eastern and western margins of the North Atlantic Ocean) during the Neogene, and eight genera were narrowly distributed (fossil representatives were restricted to either the eastern or the western margin of the North Atlantic) during the Neogene. The larval forms of fossil species within each genus were inferred by examination of protoconch morphologies, according to guidelines established by modern biologists (Robertson, 1974; Shuto, 1975). The two groups were compared using statistical methods to test a null hypothesis of no relationship between geographic distribution and larval form. The results of the study reject the null hypothesis, and support the conclusion that Neogene marine prosobranch genera that are widely distributed across the North Atlantic Ocean basin are much more likely to exhibit planktotrophic larval development than are prosobranch genera that are geographically limited to a single margin of the ocean basin.en
dc.description.degreeMaster of Scienceen
dc.format.extentvi, 115 leaves, 18 unnumbered leaves of platesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-08042009-040456en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08042009-040456/en
dc.identifier.urihttp://hdl.handle.net/10919/44171en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1993.P542.pdfen
dc.relation.isformatofOCLC# 29982275en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1993.P542en
dc.subject.lcshProsobranchia -- Larvaeen
dc.subject.lcshProsobranchia, Fossilen
dc.titleTertiary marine prosobranchs: larval dispersal and geographic rangeen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineGeological Sciencesen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LD5655.V855_1993.P542.pdf
Size:
25.19 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Masters Theses