The Complete Mitochondrial Genome of the Korean Endemic Polychaete Phyllodoce koreana (Lee & Jae, 1985) from Jindong Bay, Korea, with Additional Morphological and Ecological Features

Journal of Marine Science and Engineering, Journal Year: 2025, Volume and Issue: 13(2), P. 223 - 223

Published: Jan. 25, 2025

Phyllodoce koreana was first described in 1985 Gwangyang Bay, a semi-enclosed bay Korea affected by significant organic input from the Seomjin River and dredging activities near Port. Since then, this Korean endemic species has received limited attention taxonomic ecological studies. is known for its resilience to mild disturbances but vulnerable severe environmental changes. In study, P. specimens were collected organically polluted Asian stalked tunicate aquaculture farms at eight sites Jindong location with conditions similar those of over course five sampling events March November. Both bays experience benthic hypoxia summer due elevated water temperatures matter accumulation. Phyllodocid primarily November 2023, non-hypoxic periods, suggesting potential seasonal adaptations fluctuations. The morphological features consistent original description koreana, confirming their identification. Additionally, we reported previously overlooked details, contributing more comprehensive understanding species. We also present, time, complete mitochondrial genome species, comprising 15,559 bp, which provides essential genetic data future phylogenetic analysis protein-coding genes shows that, among 17 related polychaete (family Phyllodocidae) closely family Goniadidae. Future research should expand our knowledge taxonomy integrating additional genomes investigating role conserved gene synteny within Polychaeta.

Language: Английский

Substantial mitochondrial gene order rearrangements and differential evolution rates within the family Capitellidae (Annelida)

Zoosystematics and Evolution, Journal Year: 2025, Volume and Issue: 101(3), P. 955 - 967

Published: May 13, 2025

Capitellidae is a family of marine annelids commonly found in coastal to deep-sea sediments. These are characterized by capillary chaetae at the anterior and long-handled hooks posterior part. Although mitochondrial genomes (mtgenomes) widely used phylogenetic analyses invertebrates, their application limited many annelid families, particularly Capitellidae. In this study, we obtained complete or nearly (except control region) mtgenomes through high-throughput sequencing eight species across five genera Capitellidae: Barantolla sp., Capitella teleta , Mediomastus Notodasus sp. A, B, C, Notomastus A B. Our results indicate that from with fewer ( ) exhibit relatively conserved gene order, while those other show significant order rearrangements. Group II intron cox1 newly sequenced B & C. Phylogenetic analysis based on 13 protein-coding genes (PCGs) 37 (mtgenes) revealed three distinct clades for nine capitellid worms mtgenome: Clade 1 includes ; 2 consists 3 comprises . Notably, sister 3, both form group 1. contrast, tree constructed nuclear (ncgenes; 18S 28S H3 identified as an early branching clade within The mtgenes + ncgenes taxon Additionally, Ka/Ks ratios PCGs were much lower than Together, our different trajectories mtgenome evolution

Language: Английский

Phylogenetics of Lepidonotopodini (Macellicephalinae, Polynoidae, Annelida) and Comparative Mitogenomics of Shallow-Water vs. Deep-Sea Scaleworms (Aphroditiformia)

Biology, Journal Year: 2024, Volume and Issue: 13(12), P. 979 - 979

Published: Nov. 27, 2024

Within Polynoidae, a diverse aphroditiform family, the subfamily Macellicephalinae comprises anchialine cave-dwelling and deep-sea scaleworms. In this study, Lepidonotopodinae is synonymized with Macellicephalinae, tribe Lepidonotopodini applied to well-supported clade inhabiting chemosynthetic-based ecosystems. Newly sequenced “genome skimming” data for 30 polynoids comparatively shallow living Eulagisca gigantea used bioinformatically assemble their mitogenomes. When analyzed existing scaleworm mitogenomes, scaleworms exhibit increased gene order rearrangement events compared shallow-water relatives. Additionally, comparative analyses of vs. polynoid substitution rates in mitochondrial protein-coding genes show an overall relaxed purifying selection positive several amino acid sites species, indicating that mitogenomes have undergone selective pressure evolve metabolic adaptations suited environments. Furthermore, inclusion skimming already known species allowed coverage DNA representation taxa necessary create more robust phylogeny using 18 genes, as opposed six previously used. The phylogenetic results support erection Cladopolynoe gen. nov., Mamiwata Photinopolynoe Stratigos Themis emended diagnoses Branchinotogluma, Branchipolynoe, Lepidonotopodium, Levensteiniella.

Language: Английский