Haptophyte Phylogeny: 396 18S and 224 ITS2 Sequences with Secondary Structure

396 representative 18S rRNA sequences and 224 ITS2 sequences were compiled for haptophyte microalgae. The dataset integrates secondary structure information for phylogenetic analysis, aiming to clarify evolutionary relationships. The data was created by Louisa Ridder and last updated on March 19, 2026.

Use Cases

• Constructing phylogenetic trees based on 18S rRNA sequence-structure alignments
• Distinguishing closely related haptophyte species based on ITS2 sequence variability
• Testing the impact of secondary structure integration on phylogenetic artifact reduction
• Comparing phylogenetic outcomes from sequence-only versus sequence-structure approaches

Strengths

• Includes 396 representative 18S sequences curated from over 40,000 available sequences
• Compiles 224 ITS2 sequences for comparative analysis
• Integrates predicted secondary structure information for both 18S and ITS2 data

Limitations

• Row count and column-level documentation are unknown, limiting suitability assessment
• ITS2 data presents alignment challenges due to high sequence variability and limited taxon representation
• Some backbone phylogenetic relationships remain weakly supported

Provenance

Source

figshare

Collection Method

Taxon sampling reduced available sequences to representatives; comparative modeling and homology-based structure prediction were applied.

Freshness

Last updated 2026-03-19 17:22:57