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Regional speciation among selected g...

Robles, Rafael.

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Regional speciation among selected groups of marine nektonic, fossorial, and commensal decapod crustaceans (Portunoidea, Thalassinidea, and Alpheoidea).

Record Type:	Electronic resources : Monograph/item
Title/Author:	Regional speciation among selected groups of marine nektonic, fossorial, and commensal decapod crustaceans (Portunoidea, Thalassinidea, and Alpheoidea)./
Author:	Robles, Rafael.
Description:	155 p.
Notes:	Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1338.
Contained By:	Dissertation Abstracts International66-03B.
Subject:	Biology, Zoology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3167956
ISBN:	0542039745

Regional speciation among selected groups of marine nektonic, fossorial, and commensal decapod crustaceans (Portunoidea, Thalassinidea, and Alpheoidea).
Robles, Rafael.

Regional speciation among selected groups of marine nektonic, fossorial, and commensal decapod crustaceans (Portunoidea, Thalassinidea, and Alpheoidea). - 155 p.

Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1338.

Thesis (Ph.D.)--University of Louisiana at Lafayette, 2005.

Thirteen species of the nektonic genus Callinectes were analyzed on the basis of two mitochondrial gene fragments, 12S and 16S ribosomal. Species status for C. maracaiboensis and C. affinis is questioned. Two lineages were observed, one of which includes C. affinis, C. bocourti, C. rathbunae, C. sapidus, and C. toxotes. A second lineage is comprised of C. arcuatus, C. bellicosus, C. danae, C. exasperatus, C. larvatus, C. ornatus, and C. similis. A molecular clock for this genus suggests that separation of the two lineages of Callinectes occurred approximately 13mybp.

ISBN: 0542039745Subjects--Topical Terms:

1018632
Biology, Zoology.

Regional speciation among selected groups of marine nektonic, fossorial, and commensal decapod crustaceans (Portunoidea, Thalassinidea, and Alpheoidea).
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100 1 $a Robles, Rafael. $3 1937811
245 1 0 $a Regional speciation among selected groups of marine nektonic, fossorial, and commensal decapod crustaceans (Portunoidea, Thalassinidea, and Alpheoidea).
300 $a 155 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1338.
500 $a Director: Darryl L. Felder.
502 $a Thesis (Ph.D.)--University of Louisiana at Lafayette, 2005.
520 $a Thirteen species of the nektonic genus Callinectes were analyzed on the basis of two mitochondrial gene fragments, 12S and 16S ribosomal. Species status for C. maracaiboensis and C. affinis is questioned. Two lineages were observed, one of which includes C. affinis, C. bocourti, C. rathbunae, C. sapidus, and C. toxotes. A second lineage is comprised of C. arcuatus, C. bellicosus, C. danae, C. exasperatus, C. larvatus, C. ornatus, and C. similis. A molecular clock for this genus suggests that separation of the two lineages of Callinectes occurred approximately 13mybp.
520 $a The fossorial genus Lepidophthalmus was found to be monophyletic on the basis of 16S DNA sequence analysis. Taxonomic status for 12 species previously recognized on the basis of morphology was confirmed. Separation of Africa from South America triggered separation of the American clade from the African L. turneranus. At least 3 lineages of Lepidophthalmus may have resulted from isolation due emergence of the Isthmus of Panama. Glacial advances and retreats in the last 3 my might explain similarities among extreme populations of L. louisianensis within the Gulf of Mexico.
520 $a Diversity of the commensal genus Leptalpheus have been previously underestimated. Twelve species of Leptalpheus, including 8 undescribed forms, were found to be genetically different on the basis of 16S mitochondral DNA sequence data. Two species of Fenneralpheus were also found to be genetically different. One of them could not be considered a true species of Fenneralpheus on the basis of 16S sequences. The genus Leptalpheus was found to be paraphyletic as hypothesized. Symbiotic relationships between species of Leptalpheus with thalassinidean hosts might explain higher levels of diversity than those expected on the basis of long larval dispersal capabilities.
520 $a Some degree of coevolution was observed when comparing independently obtained 16S phylogenies of species of Leptalpheus and their thalassinidean hosts with models of maximum codivergence. Evolution of four lineages of Leptalpheus can be explained on the basis of cospeciation, host switching, extinctions, and sorting events. A clade named "Leptalpheus," initially associated with members of the genus Axianassa, subsequently give rise to Leptalpheus s.s. by switching hosts.
590 $a School code: 1363.
650 4 $a Biology, Zoology. $3 1018632
650 4 $a Biology, Molecular. $3 1017719
650 4 $a Biology, Oceanography. $3 783691
690 $a 0472
690 $a 0307
690 $a 0416
710 2 0 $a University of Louisiana at Lafayette. $3 1025962
773 0 $t Dissertation Abstracts International $g 66-03B.
790 1 0 $a Felder, Darryl L., $e advisor
790 $a 1363
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3167956