Haptophyte Phylogeny: 18S rRNA Sequence-Structure Alignment Subset

A 91.5 KB subset of 396 nearly complete 18S rRNA sequences for haptophytes, curated from over 40,000 available sequences. The dataset was created by Louisa Ridder and published on figshare in March 2026. It integrates secondary structure information to enhance phylogenetic alignment and reduce artifacts.

Use Cases

• Constructing phylogenetic trees for haptophytes based on 18S rRNA sequence-structure alignments.
• Comparing phylogenetic outcomes between sequence-only and sequence-structure approaches.
• Distinguishing closely related species using ITS2 sequence data mentioned in the study.
• Analyzing the impact of taxon sampling on phylogenetic resolution.
• Testing alignment methods to reduce phylogenetic artifacts in ribosomal RNA data.

Strengths

• Dataset is a curated subset of 396 representative sequences from over 40,000 available 18S sequences.
• Integrates secondary structure information, which the study found improved alignment quality and reduced artifacts.
• Published under a CC-BY-4.0 license, allowing for open reuse and modification.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• The dataset is a small subset (91.5 KB), representing a limited scope of the broader sequence universe.

Provenance

Source

figshare

Collection Method

Taxon sampling reduced over 40,000 available 18S sequences to 396 representatives; sequences were aligned with secondary structure information.

Freshness

Last updated 2026-03-19 17:23:01; freshness should be verified.