An integrated phylogenomic approach for potential host-associated evolution of monstrilloid copepods
Jeon, D.; Song, C.; Jeong, H.G.; Ohtsuka, S.; Lee, W.; Soh, H.Y.; Eyun, S. (2024). An integrated phylogenomic approach for potential host-associated evolution of monstrilloid copepods, in: Todd, P.A. et al. Oceanogr. Mar. Biol. Ann. Rev. 62. Oceanography and Marine Biology: An Annual Review, 62: pp. 350-375. https://dx.doi.org/10.1201/9781003477518-9
In: Todd, P.A.; Russell, B.D. (Ed.) (2024). Oceanogr. Mar. Biol. Ann. Rev. 62. Oceanography and Marine Biology: An Annual Review, 62. CRC Press: Boca Raton. ISBN 9781032761961. 410 pp. https://dx.doi.org/10.1201/9781003477518 , meer
In: Oceanography and Marine Biology: An Annual Review. Aberdeen University Press/Allen & Unwin: London. ISSN 0078-3218; e-ISSN 2154-9125, meer
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| Trefwoorden |
Crustacea [WoRMS]; Monstrilloida [WoRMS]
Marien/Kust |
| Author keywords |
Copepod Evolution; Phylogenomics; Divergence Time |
| Auteurs | | Top |
- Jeon, D.
- Song, C.
- Jeong, H.G.
- Ohtsuka, S.
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- Lee, W.
- Soh, H.Y.
- Eyun, S.
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| Abstract |
Copepods, small crustaceans, exist in almost every aquatic environment on Earth, from freshwater to hypersaline and deep-sea bottom to high mountains. They play an important role in linking primary producers to higher consumers and thus contribute to the material and energy circulation in the ecosystems. The subclass Copepoda is recognised as ten orders, and each group shows highly optimised morphology and lifestyle to diverse habitat conditions. The Monstrilloida Sars, 1901 is one of the most obscure copepod groups with an unusually atrophied morphology and unique semi-parasitic lifestyle of endoparasitic juvenile and free-living, planktonic adult phases. The lack of common diagnostic features from their morphological peculiarity and little information about the endoparasitic juveniles have caused many uncertainties and ambiguities in their taxonomy and phylogeny. To elucidate phylogenetic relationships and evolutionary significance of these organisms, we first generated two genomes and three transcriptomes from four monstrilloid species (Monstrilla grandis, Caromiobenella ohtsukai, Monstrillopsis longilobata and Maemonstrilla sp.) and analysed the 25 nuclear protein-coding genes from 40 arthropod species. The molecular phylogenomic results supported the monophyly of Monstrilloida within Podoplea. Our analysis revealed that the Monstrilloida was more closely related to the Harpacticoida (Oligoarthra) than the Siphonostomatoida. These phylogenomic relationships for the Copepoda were confirmed by statistical tree topology tests, and previously known phylogenies were rejected. Our arthropod phylogeny identified a long branch leading to the Monstrilloida. Given the new phylogeny, we tested hypotheses about monstrilloid evolution by integrating the known morphological and ecological traits of four monstrilloid genera. |
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