TY - JOUR

T1 - Polyzoa is back

T2 - The effect of complete gene sets on the placement of Ectoprocta and Entoprocta

AU - Khalturin, Konstantin

AU - Shunatova, Natalia

AU - Shchenkov, Sergei

AU - Sasakura, Yasunori

AU - Kawamitsu, Mayumi

AU - Satoh, Noriyuki

N1 - Publisher Copyright: © 2022 American Association for the Advancement of Science. All rights reserved.

PY - 2022/7/1

Y1 - 2022/7/1

N2 - The phylogenomic approach has largely resolved metazoan phylogeny and improved our knowledge of animal evolution based on morphology, paleontology, and embryology. Nevertheless, the placement of two major lophotrochozoan phyla, Entoprocta (Kamptozoa) and Ectoprocta (Bryozoa), remains highly controversial: Originally considered as a single group named Polyzoa (Bryozoa), they were separated on the basis of morphology. So far, each new study of lophotrochozoan evolution has still consistently proposed different phylogenetic positions for these groups. Here, we reinvestigated the placement of Entoprocta and Ectoprocta using highly complete datasets with rigorous contamination removal. Our results from maximum likelihood, Bayesian, and coalescent analyses strongly support the topology in which Entoprocta and Bryozoa form a distinct clade, placed as a sister group to all other lophotrochozoan clades: Annelida, Mollusca, Brachiopoda, Phoronida, and Nemertea. Our study favors the evolutionary scenario where Entoprocta, Cycliophora, and Bryozoa constitute one of the earliest branches among Lophotrochozoa and thus supports the Polyzoa hypothesis.

AB - The phylogenomic approach has largely resolved metazoan phylogeny and improved our knowledge of animal evolution based on morphology, paleontology, and embryology. Nevertheless, the placement of two major lophotrochozoan phyla, Entoprocta (Kamptozoa) and Ectoprocta (Bryozoa), remains highly controversial: Originally considered as a single group named Polyzoa (Bryozoa), they were separated on the basis of morphology. So far, each new study of lophotrochozoan evolution has still consistently proposed different phylogenetic positions for these groups. Here, we reinvestigated the placement of Entoprocta and Ectoprocta using highly complete datasets with rigorous contamination removal. Our results from maximum likelihood, Bayesian, and coalescent analyses strongly support the topology in which Entoprocta and Bryozoa form a distinct clade, placed as a sister group to all other lophotrochozoan clades: Annelida, Mollusca, Brachiopoda, Phoronida, and Nemertea. Our study favors the evolutionary scenario where Entoprocta, Cycliophora, and Bryozoa constitute one of the earliest branches among Lophotrochozoa and thus supports the Polyzoa hypothesis.

UR - http://www.scopus.com/inward/record.url?scp=85133527849&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/302a6edf-c5e5-3b6d-9f97-f782422936e9/

U2 - 10.1126/sciadv.abo4400

DO - 10.1126/sciadv.abo4400

M3 - Article

C2 - 35776797

AN - SCOPUS:85133527849

VL - 8

JO - Science advances

JF - Science advances

SN - 2375-2548

IS - 26

M1 - eabo4400

ER -