Combined support for wholesale taxic atavism in gavialine crocodylians

被引:163
作者
Gatesy, J [1 ]
Amato, G
Norell, M
DeSalle, R
Hayashi, C
机构
[1] Univ Calif Riverside, Dept Biol, Riverside, CA 92521 USA
[2] Wildlife Conservat Soc, Bronx, NY 10460 USA
[3] Amer Museum Nat Hist, Dept Vertebrate Paleontol, New York, NY 10024 USA
[4] Amer Museum Nat Hist, Dept Vertebrate Zool, New York, NY 10024 USA
基金
美国国家科学基金会;
关键词
Aves; combined evidence; Crocodylia; fossil; gavial; phylogeny;
D O I
10.1080/10635150390197037
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Morphological and molecular data sets favor robustly supported, contradictory interpretations of crocodylian phylogeny. A longstanding perception in the field of systematics is that such significantly conflicting data sets should be analyzed separately. Here we utilize a combined approach, simultaneous analyses of all relevant character data, to summarize common support and to reconcile discrepancies among data sets. By conjoining rather than separating incongruent classes of data, secondary phylogenetic signals emerge from both molecular and morphological character sets and provide solid evidence for a unified hypothesis of crocodylian phylogeny. Simultaneous analyses of four gene sequences and paleontological data suggest that putative adaptive convergences in the jaws of gavialines (gavials) and tomistomines ( false gavials) offer character support for a grouping of these taxa, making Gavialinae an atavistic taxon. Simple new methods for measuring the influence of extinct taxa on topological support indicate that in this vertebrate order fossils generally stabilize relationships and accentuate hidden phylogenetic signals. Remaining inconsistencies in minimum length trees, including concentrated hierarchical patterns of homoplasy and extensive gaps in the fossil record, indicate where future work in crocodylian systematics should be directed.
引用
收藏
页码:403 / 422
页数:20
相关论文
共 140 条
[1]   GENERIC AFFINITIES AMONG CROCODILIANS AS REVEALED BY DNA-FINGERPRINTING WITH A BKM-DERIVED PROBE [J].
AGGARWAL, RK ;
MAJUMDAR, KC ;
LANG, JW ;
SINGH, L .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1994, 91 (22) :10601-10605
[2]   COMPLETE SEQUENCE OF BOVINE MITOCHONDRIAL-DNA - CONSERVED FEATURES OF THE MAMMALIAN MITOCHONDRIAL GENOME [J].
ANDERSON, S ;
DEBRUIJN, MHL ;
COULSON, AR ;
EPERON, IC ;
SANGER, F ;
YOUNG, IG .
JOURNAL OF MOLECULAR BIOLOGY, 1982, 156 (04) :683-717
[3]  
[Anonymous], AM MUS NOVIT
[4]   Multiple sources of character information and the phylogeny of Hawaiian Drosophilids [J].
Baker, RH ;
DeSalle, R .
SYSTEMATIC BIOLOGY, 1997, 46 (04) :654-673
[5]  
Baker RH, 2002, MOLECULAR SYSTEMATICS AND EVOLUTION: THEORY AND PRACTICE, P163
[6]   AGAINST CONSENSUS [J].
BARRETT, M ;
DONOGHUE, MJ ;
SOBER, E .
SYSTEMATIC ZOOLOGY, 1991, 40 (04) :486-493
[7]  
Benton M.J., 1988, The Phylogeny and Classification of the Tetrapods, P295, DOI DOI 10.1017/S0016756800006476
[8]  
BREMER K, 1994, CLADISTICS, V10, P295, DOI 10.1006/clad.1994.1019
[9]   Morphology, fossils, divergence timing, and the phylogenetic relationships of Gavialis [J].
Brochu, CA .
SYSTEMATIC BIOLOGY, 1997, 46 (03) :479-522
[10]   Taxon sampling and reverse successive weighting [J].
Brochu, CA .
SYSTEMATIC BIOLOGY, 1999, 48 (04) :808-813