The chromosome-scale genome of the pine bark adelgid reveals conserved macrosynteny across Adelgidae

Verdict. Here, we report a chromosome-scale genome for the pine bark adelgid, Pineus strobi , providing the first genome for the genus Pineus and extending genomic sampling to an early-diverging adelgid lineage. It intersects mitochondrial stress/dysfunction themes (dynamics (fission/fusion)).

What the authors report

Chromosome evolution varies widely across Aphidomorpha: several aphid lineages exhibit extensive interautosomal reshuffling, whereas comparisons involving grape phylloxera and Adelges suggest greater chromosome conservation outside Aphididae. However, all published adelgid genomes represent the genus Adelges , leaving conservation across deeper adelgid divergences unresolved.

Key results stated in the abstract include the following. Here, we report a chromosome-scale genome for the pine bark adelgid, Pineus strobi , providing the first genome for the genus Pineus and extending genomic sampling to an early-diverging adelgid lineage. We also recovered a complete 25.3 kb mitochondrial genome with expanded, repeat-rich noncoding regions and complete circular genomes for the obligate nutritional symbionts Candidatus Annandia pinicola and Candidatus Hartigia pinicola. Finally, we recovered the first complete Wolbachia genome reported from an adelgid.

Why it matters for mitochondrial biology

Within mitochondrial research, this work maps primarily to mitochondrial dynamics, redox biology. It is relevant to mitochondrial dysfunction discourse because the abstract invokes dynamics (fission/fusion). That does not by itself establish a validated disease mechanism; it indicates thematic proximity. Server: biorxiv. Posted 2026-08-14. Synthesis confidence is bounded by abstract completeness.

Study design (abstract-level)

The abstract does not cleanly separate methods from results. Treat design details as incomplete until the full preprint is inspected.

Principal findings

1. Here, we report a chromosome-scale genome for the pine bark adelgid, Pineus strobi , providing the first genome for the genus Pineus and extending genomic sampling to an early-diverging adelgid lineage.
2. We also recovered a complete 25.3 kb mitochondrial genome with expanded, repeat-rich noncoding regions and complete circular genomes for the obligate nutritional symbionts Candidatus Annandia pinicola and Candidatus Hartigia pinicola.
3. Finally, we recovered the first complete Wolbachia genome reported from an adelgid.
4. Together, these genomes provide an integrated resource for aphidomorph evolution and symbiosis.

Limitations of this brief

• This Mitos brief is an abstract-level synthesis of a preprint; it is not peer review and not a substitute for reading the full paper.
• Preprint status: findings may change with revision or journal review.
• Effect sizes, n numbers, statistics, and full experimental controls are typically incomplete at abstract resolution.
• Comparator/control language is weak or absent in the abstract, limiting causal inference from this brief alone.
• Primary source: biorxiv DOI 10.64898/2026.08.10.743978 (posted 2026-08-14).

Open scientific questions

• Which specific experimental panels in the full paper establish the strongest causal claim, and how robust are the controls?
• How do these findings sit relative to prior literature on the same pathway—replication, contradiction, or incremental extension?

Bottom line

For mitochondrial biologists focused on mitochondrial dynamics, redox biology, this preprint is worth full-text review if the topic matches your program. Abstract-level takeaway: Here, we report a chromosome-scale genome for the pine bark adelgid, Pineus strobi , providing the first genome for the genus Pineus and extending genomic sampling to an early-diverging adelgid lineage. Confirm methods, effect sizes, and controls in the full PDF before citing the result as established.

Bibliographic record

Abstract-based editorial synthesis by Mitos. Not peer review.