@ARTICLE{TreeBASE2Ref15756,
author = {Bernhard Hausdorf},
title = {Molecular phylogeny of araneomorph spiders.},
year = {1999},
keywords = {Araneae; genitalia; haemocyanin; orb web; phylogeny},
doi = {10.1046/j.1420-9101.1999.00104.x},
url = {},
pmid = {},
journal = {Journal of Evolutionary Biology},
volume = {12},
number = {5},
pages = {980--985},
abstract = {The reconstruction of the phylogeny of spiders based on morphological and ethological characters is hampered by frequent homoplasies. Therefore, fragments of the 28S rRNA gene have been sequenced to elucidate some crucial points in the evolution of spiders. The following results were obtained. (1) The 28S rRNA gene data support the monophyly of the Entelegynae. Thus, the number of different subunits and the number of hexamers which form a haemocyanin complex must have been reduced at least twice within the spiders. The character state pattern within the spiders and within the Arachnida suggests that these reductions are due to a decrease in the selection on the oxygen binding properties of the haemocyanins as a result of the evolution of tracheae. (2) The semientelegyne spiders are not a transition stage between the Haplogynae and the Entelegynae. The lack of separate fertilization ducts in these species is probably due to secondary reduction. This reduction has decisive consequences for the flow of the sperm and for sperm competition. (3) Furthermore, the 28S rRNA gene data tentatively support the hypothesis that the orb web is either a plesiomorphy or has evolved at least twice.}
}
Citation for Study 633
Citation title:
"Molecular phylogeny of araneomorph spiders.".
This study was previously identified under the legacy study ID S463
(Status: Published).
Citation
Hausdorf B. 1999. Molecular phylogeny of araneomorph spiders. Journal of Evolutionary Biology, 12(5): 980-985.
Authors
Abstract
The reconstruction of the phylogeny of spiders based on morphological and ethological characters is hampered by frequent homoplasies. Therefore, fragments of the 28S rRNA gene have been sequenced to elucidate some crucial points in the evolution of spiders. The following results were obtained. (1) The 28S rRNA gene data support the monophyly of the Entelegynae. Thus, the number of different subunits and the number of hexamers which form a haemocyanin complex must have been reduced at least twice within the spiders. The character state pattern within the spiders and within the Arachnida suggests that these reductions are due to a decrease in the selection on the oxygen binding properties of the haemocyanins as a result of the evolution of tracheae. (2) The semientelegyne spiders are not a transition stage between the Haplogynae and the Entelegynae. The lack of separate fertilization ducts in these species is probably due to secondary reduction. This reduction has decisive consequences for the flow of the sperm and for sperm competition. (3) Furthermore, the 28S rRNA gene data tentatively support the hypothesis that the orb web is either a plesiomorphy or has evolved at least twice.
Keywords
Araneae; genitalia; haemocyanin; orb web; phylogeny
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S633
- Other versions:
Nexus
NeXML
- Show BibTeX reference
@ARTICLE{TreeBASE2Ref15756,
author = {Bernhard Hausdorf},
title = {Molecular phylogeny of araneomorph spiders.},
year = {1999},
keywords = {Araneae; genitalia; haemocyanin; orb web; phylogeny},
doi = {10.1046/j.1420-9101.1999.00104.x},
url = {},
pmid = {},
journal = {Journal of Evolutionary Biology},
volume = {12},
number = {5},
pages = {980--985},
abstract = {The reconstruction of the phylogeny of spiders based on morphological and ethological characters is hampered by frequent homoplasies. Therefore, fragments of the 28S rRNA gene have been sequenced to elucidate some crucial points in the evolution of spiders. The following results were obtained. (1) The 28S rRNA gene data support the monophyly of the Entelegynae. Thus, the number of different subunits and the number of hexamers which form a haemocyanin complex must have been reduced at least twice within the spiders. The character state pattern within the spiders and within the Arachnida suggests that these reductions are due to a decrease in the selection on the oxygen binding properties of the haemocyanins as a result of the evolution of tracheae. (2) The semientelegyne spiders are not a transition stage between the Haplogynae and the Entelegynae. The lack of separate fertilization ducts in these species is probably due to secondary reduction. This reduction has decisive consequences for the flow of the sperm and for sperm competition. (3) Furthermore, the 28S rRNA gene data tentatively support the hypothesis that the orb web is either a plesiomorphy or has evolved at least twice.}
}
- Show RIS reference
TY - JOUR
ID - 15756
AU - Hausdorf,Bernhard
T1 - Molecular phylogeny of araneomorph spiders.
PY - 1999
KW - Araneae; genitalia; haemocyanin; orb web; phylogeny
UR - http://dx.doi.org/10.1046/j.1420-9101.1999.00104.x
N2 - The reconstruction of the phylogeny of spiders based on morphological and ethological characters is hampered by frequent homoplasies. Therefore, fragments of the 28S rRNA gene have been sequenced to elucidate some crucial points in the evolution of spiders. The following results were obtained. (1) The 28S rRNA gene data support the monophyly of the Entelegynae. Thus, the number of different subunits and the number of hexamers which form a haemocyanin complex must have been reduced at least twice within the spiders. The character state pattern within the spiders and within the Arachnida suggests that these reductions are due to a decrease in the selection on the oxygen binding properties of the haemocyanins as a result of the evolution of tracheae. (2) The semientelegyne spiders are not a transition stage between the Haplogynae and the Entelegynae. The lack of separate fertilization ducts in these species is probably due to secondary reduction. This reduction has decisive consequences for the flow of the sperm and for sperm competition. (3) Furthermore, the 28S rRNA gene data tentatively support the hypothesis that the orb web is either a plesiomorphy or has evolved at least twice.
L3 - 10.1046/j.1420-9101.1999.00104.x
JF - Journal of Evolutionary Biology
VL - 12
IS - 5
SP - 980
EP - 985
ER -
Go to search
Citation
Taxa
Matrices
Trees
Analyses
