Flag for Taxon: Genus Ceratium
| Flagger | Content Author | Content | Reason | Flag Created | Resolved by | Resolution |
|---|---|---|---|---|---|---|
| someplant | Genus Ceratium |
genus has been split |
Mar. 15, 2024 04:42:01 +0000 | t_e_d |
Done. |
Comments
Tagging people for potential feedback:
@kenk @roman-evseev @roman_romanov @ozalga @jenny_re
There is only a small number of freshwater species in Ceratium. Going by the Freshwater Flora of Central Europe: Dinophyceae (also includes records and species globally), they list the following taxa: Ceratium carolinianum, C. cornutum, C. furcoides, C. hirundinella (several subspecific forms/types are also recognised) and C. brachyceroides. (edit: and C. rhomvoides)
I would consider the rest of the species to be essentially the marine clade i.e. Tripos but it might be best to only use this genus if the species in question has been confirmed using phylogenetic markers and officially transferred to the genus.
I have been collecting and identifying marine plankton in the Monterey Bay (California) for 2+ years as part of the Phytoplankton Monitoring Network (NOAA / NCCOS). I occasionally also collect in freshwater. When I began I used the Genus Ceratium for marine specimens. I changed my marine IDs to Tripos when I was made aware of the split. I have found two specimens in freshwater. I am not in any way an expert.
https://www.inaturalist.org/observations/137704030
https://www.inaturalist.org/observations/137461888
Taxon changed :
https://www.inaturalist.org/taxon_changes/141177
https://www.inaturalist.org/taxon_changes/141728
https://www.inaturalist.org/taxon_changes/141729
https://www.inaturalist.org/taxon_changes/141730
https://www.inaturalist.org/taxon_changes/141731
https://www.inaturalist.org/taxon_changes/141732
https://www.inaturalist.org/taxon_changes/141733
https://www.inaturalist.org/taxon_changes/141734
https://www.inaturalist.org/taxon_changes/141735
https://www.inaturalist.org/taxon_changes/141736
https://www.inaturalist.org/taxon_changes/141738
https://www.inaturalist.org/taxon_changes/141739
https://www.inaturalist.org/taxon_changes/141740
https://www.inaturalist.org/taxon_changes/141741
https://www.inaturalist.org/taxon_changes/141742
https://www.inaturalist.org/taxon_changes/141743
https://www.inaturalist.org/taxon_changes/141744
https://www.inaturalist.org/taxon_changes/141745
https://www.inaturalist.org/taxon_changes/141746
https://www.inaturalist.org/taxon_changes/141747
https://www.inaturalist.org/taxon_changes/141748
https://www.inaturalist.org/taxon_changes/141749
Let me know if I have missed any.
@t_e_d thanks!
A considerable amount of Tripos species are identified as the genus Ceratium. I think it might make sense to do a taxon split for the genus Ceratium itself, do you agree?
You are welcome !
Genera can’t be atlased on iNaturalist. A taxon split will move all IDs at the genus level to the family Ceratiaceae.
I can go back and add genus-level IDs (Ceratium or Tripos) to them. I think it's worth it, because at the moment the genus-level IDs seem to be majority Tripos. https://www.inaturalist.org/observations?lrank=genus&place_id=any&taxon_id=334072
genera can indeed be atlased on iNaturalist.
@someplant is the division between Ceratium and Tripos strictly freshwater vs. marine? if so, while there isn't a great way to separate marine and freshwater observations in atlases, we could at least limit it so only coastal/near-coastal observations get bumped up to Ceratiaceae (keeping all inland ones as Ceratium). however, if there's any other significant geographic overlap between the genera (are the ID and locality of that Iowa Tripos furca observation accurate?), we'd probably have to bump all IDs up to family.
Please, tell me how to atlas a genus !
while only species have a link to create an atlas on the taxon page, if you go to https://www.inaturalist.org/atlases/new you can search any taxon of any rank that you'd like to atlas (or replace the square brackets in this URL with the taxon ID: https://www.inaturalist.org/atlases/new?taxon_id=[____]). (you can also get there by clicking the red-highlighted "Not Atlased" next to the output taxa when you create a draft taxonomic split.) here's one example of a genus-level split with atlases: https://www.inaturalist.org/taxon_changes/122565
@maxkirsch Yes, Ceratium is exclusively freshwater and Tripos is exclusively marine (although of course there will be a stray cell or two in the "wrong" habitat).
About that Tripos furca observation in Iowa (https://www.inaturalist.org/observations/89367560 ): I think it's misidentified. According to my (subjective) judgement, Tripos furca would have a narrower overall shape.
@maxkirsch : thank you !
no problem!
i've gone ahead and started up draft atlases for Ceratium and Tripos. (I've filled in some regions with clearly only inland observations on the Ceratium atlas, and a couple of the regions with solely marine observations on the Tripos atlas, but there are still a lot of regions i've yet to atlas for one or the other or both. if anyone else wants to edit them, they're welcome to do so; otherwise, i should be able to finish atlasing them tomorrow.)
Thanks @maxkirsch!
no problem!
125 observations atlased as Ceratium
131 observations atlased as Tripos
17 observations outside of atlases (because they don't have a location, they're outside the standard locations, the location is private, etc.; a couple might be atlasable) that will be bumped up to Ceratiaceae
162 observations from where the atlases overlap (counties/districts/etc. with both freshwater and marine observations, or at least where i thought that was the case) that have to be bumped up to Ceratiaceae
(let me know if that breakdown looks generally ok)
Looks good! In any case, I plan to go back through all the observations and add genus-level IDs or lower.
Thank you all for the wonderful work here!
Ceratium has been split into two genera: Ceratium s.s. and Tripos (see Gómez 2013 (https://cicimaroceanides.mx/index.php/revista/article/view/119) for details). The two groups apparently form separate (but sister) clades. The delineation between these two genera is pretty simple: freshwater species in Ceratium, marine species in Tripos.
Currently, iNaturalist has the genus Tripos, but some of the species are still in Ceratium. Some species are duplicated (e.g. Tripos furca, Ceratium furca), which is a problem!