Morphology disentangles the systematics of a ubiquitous but elusive meiofaunal group (Kinorhyncha: Pycnophyidae)

Sánchez, Nuria; Yamasaki, Hiroshi; Pardos, Fernando; Sørensen, Martin V.; Martínez, Alejandro

doi:10.1111/cla.12143

Cited by 40 publications

(34 citation statements)

References 76 publications

(154 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To investigate the effect of different analytical parameters on the tree topologies (Wheeler, ), timed searches were run using six independent analytical parameter sets named 111, 121, 211, 221, 3211 and 3221 (Boyer et al., ; Martínez et al., ; Sánchez et al., ). To ensure the recovery of all optimal trees, each search started with multiple Wagner trees, which were optimized with subtree pruning and regrafting (SPR) and tree bisection and reconnection (TBR) algorithms, followed by several rounds of ratcheting and tree fusing.…”

Section: Methodsmentioning

confidence: 99%

“…The tree topology corresponding to parameter set 3221 was chosen to summarize the results as this parameter set has been philosophically justified (De Laet, ). This parameter set (3221) includes the ability to use non‐linear indel costs, where indel opening and indel extension receive different values (3 vs. 1), favouring longer indel events (a more realistic assumption for ribosomal genes) versus many single events, therefore maximizing the congruence between partitions (Martínez et al., ; Sánchez et al., ).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Phylogeny and systematics of Aphroditiformia

et al. 2017

Self Cite

View full text Add to dashboard Cite

Aphroditiformia represents one of the most successful radiations of annelids, and is therefore an interesting model to understand morphological and functional evolution. Previous phylogenetic analyses yielded most families as monophyletic but excluded anchialine and interstitial species while failing to recover relationships within Sigalionidae. Here we address these shortcomings through the analysis of four molecular markers and 87 morphological characters sampled across 127 species under the assumptions of parsimony and model-based methods. Of the 34 newly sequenced taxa, five anchialine and 24 interstitial species were included, with increased representation of Sigalionidae. An additional 28 elusive Sigalionidae taxa were included, represented only by morphological partitions. Molecular and morphological partitions were evaluated under exhaustive sensitivity analyses, testing the effects of alignment algorithms and optimization criteria on tree topologies. Our trees congruently recovered six clades corresponding to the families within Aphroditiformia: Acoetidae, Aphroditidae, Eulepethidae, Iphionidae, Polynoidae and Sigalionidae, respectively. An anchialine polynoid lineage was nested among strictly deep sea species, and interstitial pisionids and pholoids formed two independent clades nested within Sigalionidae. Additionally, Sigalionidae resulted in four clades, defined by combinations of apomorphies, and hereby we propose the subfamilies Pelogeniinae, Pholoinae, Pisioninae, Sthenelanellinae, as well as the provisionally included polyphyletic Sigalioninae.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Phylogeny and systematics of Aphroditiformia

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…The characteristic features of Pycnophyes alexandroi sp. nov. do not fit with the diagnostic characters of none of the newly pycnopyid genera erected by Sánchez et al (2016).…”

Section: Pycnophyes Alexandroi Sp Novmentioning

confidence: 75%

“…nov. only appeared in Bocas del Toro at the sampling locality near the Station dock (BRS 008; see Table 2). For Pacific Panama, see Pardos et al 2016, this issue.…”

Section: Associated Kinorhynch Faunamentioning

confidence: 99%

See 1 more Smart Citation

Two sides of a coin: The phylum Kinorhyncha in Panama. I) Caribbean Panama

Pardos

Sánchez

Herranz

2016

Zoologischer Anzeiger - A Journal of Comparative Zoology

Self Cite

View full text Add to dashboard Cite

Sampling for meiofauna was carried out in 2010 in Bocas del Toro, Northwest Caribbean Panama, as the first part of a study along Caribbean and Pacific coasts of Panama. Nine kinorhynch species were known previously from the area, some of them being confirmed in the present contribution plus several new citations. In addition, four species new to science are described, Echinoderes rociae sp. nov., Echinoderes orestauri sp. nov., Cristaphyes panamensis sp. nov. and Pycnophyes alexandroi sp. nov. Furthermore, and based on the present material, we redescribe Echinoderes intermedius providing new and more detailed morphological information. The presence of Echinoderes truncatus in the area, reported previously, is also discussed. Hence, an updated list of the kinorhynch fauna for the Caribbean Sea is provided, reaching 33 species.

show abstract

Marine connectivity dynamics: clarifying cosmopolitan distributions of marine interstitial invertebrates and the meiofauna paradox

2018

View full text Add to dashboard Cite

Many interstitial species were first described as widely distributed, often cosmopolitan or amphi-oceanic, contrasting with descriptions of a sedentary life style and the general absence of pelagic dispersal stages. These inconsistencies became known as the "meiofauna paradox". In this review we present a literature review investigating these inconsistencies and address the assumptions of the meiofauna paradox. We break the paradox down to two aspects including species distribution and dispersal. Focusing on distribution, we demonstrate that wide distributions are seldom given and false records likely stem from biological phenomena like stasis or recent speciation. These phenomena account for morphological similarity, ultimately represented by the pronounced occurrence of cryptic species with restricted distribution ranges. Additionally, taxonomic artefacts such as the erroneous application of taxonomic keys contribute to the report of widely distributed species. Considering dispersal, we point out the mismatch between traditional assumptions of meiofaunal sedentarism and growing experimental and empirical evidences suggesting higher dispersal potential. These evidences include not only indications for dispersal by pelagic stages, but further consider ecological and life-history traits in shaping distribution ranges. We conclude that the meiofauna paradox sensu strictu most likely does not exist and provide a roadmap for future research, suggesting a focus on morphological similarity and marine connectivity. Meiofaunal research should concentrate on evolutionary factors resulting in morphological similarity, improving the taxonomic resolution of species complexes and conducting more sophisticated experimental experiments to meiofaunal dispersal. In all cases meiofaunal research will benefit from high-throughput sequencing such as genome scanning approaches, metagenomics or metatranscriptomics.

show abstract

Morphology disentangles the systematics of a ubiquitous but elusive meiofaunal group (Kinorhyncha: Pycnophyidae)

Cited by 40 publications

References 76 publications

Phylogeny and systematics of Aphroditiformia

Phylogeny and systematics of Aphroditiformia

Two sides of a coin: The phylum Kinorhyncha in Panama. I) Caribbean Panama

Marine connectivity dynamics: clarifying cosmopolitan distributions of marine interstitial invertebrates and the meiofauna paradox

Contact Info

Product

Resources

About