Multiple evolutionary transitions of reproductive strategies in a phylum of aquatic colonial invertebrates

Autor(en)

Heather E. Grant, Andrew N. Ostrovsky, Helen L. Jenkins, Leandro M. Vieira, Dennis P. Gordon, Peter G. Foster, Olga N. Kotenko, Abigail M. Smith, Björn Berning, Joanne S. Porter, Wayne K. Florence, Javier Souto Derungs, Kevin J. Tilbrook, Andrea Waeschenbach

Abstrakt

Parental care is considered crucial for the enhanced survival of offspring and evolutionary success of many metazoan groups. Most bryozoans incubate their young in brood chambers or intracoelomically. Based on the drastic morphological differences in incubation chambers across members of the order Cheilostomatida (class Gymnolaemata), multiple origins of incubation were predicted in this group. This hypothesis was tested by constructing a molecular phylogeny based on mitogenome data and nuclear rRNA genes 18S and 28S with the most complete sampling of taxa with various incubation devices to date. Ancestral character estimation suggested that distinct types of brood chambers evolved at least 10 times in Cheilostomatida. In Eucratea loricata and Aetea spp. brooding evolved unambiguously from a zygote-spawning ancestral state, as it probably did in Tendra zostericola, Neocheilostomata, and 'Carbasea' indivisa. In two further instances, brooders with different incubation chamber types, skeletal and non-skeletal, formed clades (Scruparia spp., Leiosalpinx australis) and (Catenicula corbulifera (Steginoporella spp. (Labioporella spp., Thalamoporella californica))), each also probably evolved from a zygote-spawning ancestral state. The modular nature of bryozoans probably contributed to the evolution of such a diverse array of embryonic incubation chambers, which included complex constructions made of polymorphic heterozooids, and maternal zooidal invaginations and outgrowths.

Organisation(en)

Institut für Paläontologie

Externe Organisation(en)

Institute of Cancer Research, Natural History Museum London, Saint Petersburg State University, University of Otago, University of Exeter, Universidade Federal de Pernambuco, National Institute of Water and Atmospheric Research Ltd., Universität Hamburg, Centro de Investigação em Biodiversidade e Recursos Genéticos, University of the Azores (UAc), Heriot-Watt University, Iziko Museums of South Africa

Journal

Proceedings of the Royal Society B: Biological Sciences

Band

290

Seiten

1-12

Anzahl der Seiten

12

ISSN

0962-8452

DOI

https://doi.org/10.1098/rspb.2023.1458

Publikationsdatum

11-2023

Peer-reviewed

Ja

ÖFOS 2012

106054 Zoologie, 106012 Evolutionsforschung, 106013 Genetik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Immunologie und Mikrobiologie, Allgemeine Biochemie, Genetik und Molekularbiologie, Allgemeine Umweltwissenschaft, Allgemeine Agrar- und Biowissenschaften

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/0733818e-91cd-41ff-8423-af8f7c32a74c