Phylogeny of the Echinoderes coulli-group (Kinorhyncha:Cyclorhagida:Echinoderidae) - a cosmopolitan species group trapped in the intertidal

Autor(es)

Randso, Phillip Vorting ^[1] ; Yamasaki, Hiroshi ^[2] ; Bownes, Sarah Jane ^[3] ; Herranz, Maria ^{[4, 5]} ; Di Domenico, Maikon ^[6] ; Bin Qii, Gan ^[7] ; Sorensen, Martin Vinther ^[1]

Afiliação do(s) autor(es)

^[1] Univ Copenhagen, Sect GeoGenet, Nat Hist Museum Denmark, Oster Voldgade 5-7, DK-2100 Copenhagen - Denmark

^[2] Leibniz Inst Evolut & Biodivers Sci, Museum Nat Kunde, Invalidenstr 43, D-10115 Berlin - Germany

^[3] Univ KwaZulu Natal, Sch Life Sci, Westville Campus, Univ Rd, ZA-3629 Westville - South Africa

^[4] Univ British Columbia, Dept Zool, Vancouver, BC V6T 1Z4 - Canada

^[5] Univ British Columbia, Dept Bot, Vancouver, BC V6T 1Z4 - Canada

^[6] Univ Fed Parana, Lab Modelagem Ecol, Ctr Estudos Mar, BR-83255976 Curitiba, Parana - Brazil

^[7] Natl Univ Singapore, Trop Marine Sci Inst, S2S, 18 Kent Ridge Rd, Singapore 119227 - Singapore

• Tipo de documento: Artigo Científico
• Fonte: INVERTEBRATE SYSTEMATICS; v. 33, n. 3, p. 501-517, 2019.
• Citações Web of Science: 0

Resumo

Kinorhyncha is a phylum of microscopic, benthic marine invertebrates found throughout the world, from the Arctic to Antarctica and from the intertidal zone to the deep sea. Within the most species-rich genus, Echinoderes, we find a putatively monophyletic species group, the so-called Echinoderes coulli-group. The remarkable morphological similarities of the E. coulli-group species and the fact that the group has a global distribution even though most of the species are restricted to intertidal habitats, has led to the hypothesis that dispersal and speciation within the group has been driven by the process of continental drift. However, this has never been confirmed empirically. With morphology and two molecular loci, COI and 18S, we calculated phylogenetic trees by analysing datasets separately and in combination using Maximum Parsimony, Maximum Likelihood and Bayesian Inference. Using different models of evolution in combination with different statistical approaches, we show that two major clade divergences were consistent with historic drifting of continents, suggesting that vicariance has played an important role for the speciation within the E. coulli-group. Furthermore, we found that reconstructions of past tectonic drifting since the Devonian (416-359 million years ago) were able to explain present species distributions, and suggest that the group originated in a supposedly vast shallow marine environment in north-eastern Gondwana by the mid-late Silurian, 426-416 million years ago. (AU)

• Processo FAPESP: 12/08581-0 - Anelídeos intersticiais: sistemática e filogenia de uma fauna negligenciada
• Beneficiário: Maikon Di Domenico
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado