Phylomitogenomics bolsters the high-level classification of Demospongiae (phylum Porifera)

被引:8
|
作者
Lavrov, Dennis V. [1 ]
Diaz, Maria C. [2 ,3 ]
Maldonado, Manuel [4 ]
Morrow, Christine C. [5 ,6 ]
Perez, Thierry [7 ]
Pomponi, Shirley A. [2 ]
Thacker, Robert W. [8 ,9 ]
机构
[1] Iowa State Univ, Dept Ecol Evolut & Organismal Biol, Ames, IA 50011 USA
[2] Florida Atlantic Univ, Harbor Branch Oceanog Inst, Ft Pierce, FL USA
[3] Museo Marino Margarita, Boca Del Rio, Nueva Esparta, Venezuela
[4] Ctr Estudios Avanzados Blanes CEAB CSIC, Dept Marine Ecol, Girona, Spain
[5] Sch Nat Sci & Ryan Inst, NUI Galway, Zool Dept, Univ Rd, Galway, Ireland
[6] Ireland & Queens Univ Marine Lab, Portaferry, Ireland
[7] Aix Marseille Univ, Avignon Univ, Inst Mediterraneen Biodiversite & Ecol Marine & Co, CNRS,IRD, Avignon Univ, Provence, France
[8] SUNY Stony Brook, Dept Ecol & Evolut, Stony Brook, NY USA
[9] Smithsonian Trop Res Inst, Panama City, Panama
来源
PLOS ONE | 2023年 / 18卷 / 12期
基金
美国国家科学基金会;
关键词
PHYLOGENETIC RECONSTRUCTION; MITOCHONDRIAL GENOME; GLASS SPONGES; DNA; EVOLUTION; PROGRAM; TAXONOMY; NUCLEAR; PROTEIN; GENES;
D O I
10.1371/journal.pone.0287281
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Class Demospongiae is the largest in the phylum Porifera (Sponges) and encompasses nearly 8,000 accepted species in three subclasses: Keratosa, Verongimorpha, and Heteroscleromorpha. Subclass Heteroscleromorpha contains similar to 90% of demosponge species and is subdivided into 17 orders. The higher level classification of demosponges underwent major revision as the result of nearly three decades of molecular studies. However, because most of the previous molecular work only utilized partial data from a small number of nuclear and mitochondrial (mt) genes, this classification scheme needs to be tested by larger datasets. Here we compiled a mt dataset for 136 demosponge species-including 64 complete or nearly complete and six partial mt-genome sequences determined or assembled for this study-and used it to test phylogenetic relationships among Demospongiae in general and Heteroscleromorpha in particular. We also investigated the phylogenetic position of Myceliospongia araneosa, a highly unusual demosponge without spicules and spongin fibers, currently classified as Demospongiae incertae sedis, for which molecular data were not available. Our results support the previously inferred sister-group relationship between Heteroscleromorpha and Keratosa + Verongimorpha and suggest five main clades within Heteroscleromorpha: Clade C0 composed of order Haplosclerida; Clade C1 composed of Scopalinida, Sphaerocladina, and Spongillida; Clade C2 composed of Axinellida, Biemnida, Bubarida; Clade C3 composed of Tetractinellida; and Clade C4 composed of Agelasida, Clionaida, Desmacellida, Merliida, Suberitida, Poecilosclerida, Polymastiida, and Tethyida. The inferred relationships among these clades were (C0(C1(C2(C3+C4)))). Analysis of molecular data from M. araneosa placed it in the C3 clade as a sister taxon to the highly skeletonized tetractinellids Microscleroderma sp. and Leiodermatium sp. Molecular clock analysis dated divergences among the major clades in Heteroscleromorpha from the Cambrian to the Early Silurian, the origins of most heteroscleromorph orders in the middle Paleozoic, and the most basal splits within these orders around the Paleozoic to Mesozoic transition. Overall, the results of this study are mostly congruent with the accepted classification of Heteroscleromorpha, but add temporal perspective and new resolution to phylogenetic relationships within this subclass.
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页数:27
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