# Missing species sequence on Greengenes2 2024.09
**URL:** https://forum.qiime2.org/t/missing-species-sequence-on-greengenes2-2024-09/32778
**Category:** General Discussion
**Tags:** greengenes2
**Created:** [March 17, 2025, 1:15pm UTC](https://forum.qiime2.org/t/missing-species-sequence-on-greengenes2-2024-09/32778 "2025-03-17T13:15:48Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@gulu](https://forum.qiime2.org/u/gulu)
#### Post date: [March 17, 2025, 1:15pm UTC](https://forum.qiime2.org/t/missing-species-sequence-on-greengenes2-2024-09/32778/1 "2025-03-17T13:15:48Z")
Hi everyone,
I found that there are no sequences for Escherichia coli in Greengenes2 2024.09, while they are present in Greengenes2 2022.10. What could be the reason for this?
Greengenes2 2024.09：
Escherichia albertii
Escherichia fergusonii
Escherichia hermannii
Escherichia marmotae
Escherichia ruysiae
Greengenes2 2022.10：
Escherichia albertii
Escherichia coli
Escherichia fergusonii
Escherichia hermannii
Escherichia marmotae
Escherichia ruysiae
---
### Author:  [@wasade](https://forum.qiime2.org/u/wasade)
#### Post date: [March 17, 2025, 4:05pm UTC](https://forum.qiime2.org/t/missing-species-sequence-on-greengenes2-2024-09/32778/2 "2025-03-17T16:05:06Z")
It's known, the records are there but the reason for change in taxonomic placement is not understood yet, see [Missing E.coli from GG2, or is called something else now? · Issue #29 · biocore/q2-greengenes2 · GitHub](https://github.com/biocore/q2-greengenes2/issues/29#issuecomment-2704285190)
---
### Author:  [@gulu](https://forum.qiime2.org/u/gulu)
#### Post date: [March 18, 2025, 1:54am UTC](https://forum.qiime2.org/t/missing-species-sequence-on-greengenes2-2024-09/32778/3 "2025-03-18T01:54:39Z")
Thank you for your reply, very helpful!