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xanergo loarie tropical bushmint (Cantinoa mutabilis)

Proposal Not to split the genus Hyptis into Cantinoa, Condea, Cyanocephalus, Eplingiella, Eriopidion, Gymneia, Leptohyptis, Martianthus, Medusantha, Mesosphaerum, Oocephalus and Physominthe

Oct. 13, 2018 00:43:09 +0000 loarie

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Not to split the genus Hyptis into: Cantinoa Harley & J.F.B.Pastore, Condea Adanson, Cyanocephalus (Pohl ex Benth.) Harley & J.F.B.Pastore, Eplingiella Harley & J.F.B.Pastore, Eriopidion Harley, Gymneia (Benth.) Harley & J.F.B.Pastore, Leptohyptis Harley & J.F.B.Pastore, Martianthus Harley & J.F.B.Pastore, Medusantha Harley & J.F.B.Pastore, Mesosphaerum Browne, Oocephalus (Benth.) Harley & J.F.B.Pastore, and Physominthe Harley & J.F.B.Pastore.

The splitting of Hyptis sensu lato was proposed by Harley & Pastore (2012) based on the phylogenetic results of another paper in which it is clear that the genus is paraphyletic (Pastore et al. 2011). However, I consider that in base to the low resolution in several sections of the phylogenetic trees recovered, and the limited sampling of Hyptis s.l. species, the erection of a new classification proposal should have waited for additional evidence. Hence, the splitting of Hyptis seems to me premature and It could cause confusion in the identification of the species. I commented on this in the following extract of the paper González-Gallegos et al. (2014):

Posted by xanergo over 5 years ago

“Besides, phylogenetic analysis based on DNA sequences (Pastore et al. 2011) have brought to light Hyptis as a polyphyletic genus since all other Hyptidinae genera appeared nested within Hyptis lineages in the cladograms. Also, the polyphyly of the genus had been previously suggested by the phenetic analysis of morphological characters (El-Gazzar & Rabei 2008). Given this complexity, two solutions may be taken, one is to reduce all other Hyptidinae genera under Hyptis, otherwise it should be recognized a much larger number of genera. In this context, Pastore et al. (2011) claimed for the segregation of new genera to build a monophyletic delimitation of Hyptis as a better solution rather than the submersion of all Hyptidinae within only one genus. Harley & Pastore (2012) did not consider a good choice leaving a single genus with a broad range of morphological variation, purportedly unmatched in any other genus of flowering plants. So, they decided to integrate a new classification proposal for Hyptidinae segregating new genera grounded mainly in the cladograms presented by Pastore et al. (2011). Accordingly, they increased the number of genera within the subtribe from 8 (Harley et al. 2004) to 19, with the coinage of six new generic names and status change of five infrageneric categories. Moreover, this approach generates 142 new nomenclatural combinations.
However, little less than half of Hyptidinae species are represented in Pastore et al. (2011), and although the clades are well supported in the topology shown, there are also several politomies in the cladograms that create mistrust in the clade relationships in spite of their support. In addition, distinction of the genera they proposed is ambiguous through the dichotomous key provided (Harley & Pastore 2012): characters are not precisely defined, measurements are not always used in lieu of uncertain terms, the parallelism between two leads is inconsistent and not clearly contrasting, several unqualified negative statements are done; these features are contrary to what is recommended to construct an identification key (Judd et al. 2008). Moreover, morphological diversity is not synonymous with taxonomic diversity, and a broad morphological variation is not unique of Hyptis s.l. For example, in the large subtribe Euphorbiinae some authors decided to retain a single well-known and easily identifiable genus, Euphorbia Linnaeus (1753: 450), instead of a vaguely circumscribed multitude of genera; thereby Euphorbia becomes one of the most striking morphologically diversified genera of vascular plants, which embraces perennial and annual herbs, erect and scandent shrubs, trees, geophytes and succulents, including representatives of the three different kinds of carbon fixation C3, C4 and CAM, a high variability of ploidy levels, but unified by the particular and conserved configuration of its inflorescences, the cyathia (Steinmann & Porter 2002, Horn et al. 2012, Yang et al. 2012, Dorsey et al. 2013, Riina et al. 2013). Another important consideration is that a classification pursues conflicting goals, on one hand it tries to be a true picture of evolutionary history, and on the other it is committed to be practical in order to be useful to general public and not being only an academic whim; thus, an ethic position as a systematist should be to find a balance between both sides. The convenience of a classification can be evaluated in terms that it implies easily diagnosable groups (i.e. well supported, preferably with synapomorphic characters), and in second instance, few nomenclatural changes. Submerging all Hyptidinae within Hyptis demands 32 nomenclatural changes almost 5 times less than the choice taken by Harley and Pastore (2012). In summary, taking in consideration the uncertainty about phylogenetic results, the hardness in morphologically delimiting Hyptidinae genera, we keep on recognizing provisionally the traditional Hyptis definition instead of several new poorly defined genera. It is probable that the best solution in the near future will be to submerge all Hyptidinae within Hyptis; though, more compelling evidence is needed to take a definitive decision.”

Posted by xanergo over 5 years ago

Considering the above, in a recent paper with a checklist of all native Lamiaceae species growing in Mexico (Martínez-Gordillo et al. 2017), the different researchers on the diversity of the family decided not to follow Harley & Pastore (2012) proposal instead of the more stable previous worldwide summary: Harley et al. (2004). They claimed that, although, that other classification approach is not evolutionary informative, it is the better option for now until a more robust and integrative proposal is developed.

I understand how complex is deciding what taxonomic name is the correct among several options, or several taxonomic approaches; however, in iNaturalist, of the 24 Cantinoa species recognized by Harley and Pastore (2014) only Hyptis mutabilis is accepted under that generic name. Similarly, under Condea and Eplingiella only 1 species is recognized as such in the platform; in the rest of the segregated genera, no species is listed.

Therefore, I recommend keep using Harley et al (2004) circumscription for now; that is, accepting only Asterohyptis, Eriope, Hypenia, Hyptidendron, Hyptis s.l., Marsypianthes, Peltodon, and Rhaphiodon. Otherwise, the complete classification scheme of the segregated genera should be uploaded to the platform… or, another option would be allowing the use of both names, the one under Hyptis and those under the segregated genera.

Harley, RM & JFB Pastore. 2012. A generic revision and new combinations in the Hyptidinae (Lamiaceae), based on molecular and morphological evidence. Phytotaxa 58: 1-55.
Harley, RM, S Atkins, A. Budantsev, PD Cantino, B Conn, R Grayer, MM Harley, R de Kok, T Krestovskaja, A Morales, AJ Paton, O Ryding & T Upson. 2004. Labiatae. In: Kadereit, JW (ed.) The families and genera of vascular plantas 7. Springer, Berlin & Hedidelberg, pp. 167-275.
González-Gallegos, JG, A Castro-Castro, A Flores-Argüelles & AR Romero-Guzmán. Discovery of Hyptis pseudolantana in Jalisco and Michoacán, and description of H. cualensis and H. macvaughii (Ocimeae, Lamiaceae), two new species from western Mexico. Phytotaxa 163: 149-165.
Martínez-Gordillo, M, B Bedolla-García, G Cornejo-Tenorio, I Fragoso-Martínez, MR García-Peña, JG González-Gallegos, SI Lara-Cabrera & S Zamudio. 2017. Lamiaceae de México. Botanical Sciences 95: 780-806.
Pastore, JFB, RM Harley, F Forrest, AJ Paton & C van den Berg. 2011. Phylogeny of the subtirbe Hyptidinae (Lamiaceae tribe Ocimeae) as inferred from nuclear and plastid DNA. Taxon 60: 1317-1329.

Posted by xanergo over 5 years ago

@bouteloua Hey Cassi. Apologies for bugging you about a minor swap, but do you have experience reverting a committed swap? I'm hoping there's an easy solution, but I can't seem to find the proper route after digging around on the site and on iNat's Google Groups board...

Posted by alex_abair over 5 years ago

Yes--only the site staff can do it, and it can only be within a certain time period after committing the swap. You can try pinging Scott Loarie to request it if possible.

(side note that I have not yet read the above long comments!)

Posted by bouteloua over 5 years ago

Thanks @bouteloua .

Hi @loarie , would you be willing/able to revert this committed swap? I made this swap according to taxonomic changes from POWO, but it appears the changes do not reflect the true taxonomy. If a reversion is not possible, is there another route I should take to resolve this?

Posted by alex_abair over 5 years ago

what swap?

Posted by loarie over 5 years ago
Posted by alex_abair over 5 years ago

looks like it was committed over 5 months ago? I don't recommend reverting which leaves a lot of loose ends with regards to stuff that happened after the change

Posted by loarie over 5 years ago

True. I'm happy to go through all 90 of those observations and clean them up, but I'm also ok with leaving it if it's a hassle for you.

Posted by alex_abair over 5 years ago

I haven't followed this closely - but it sounds like the issue is that folks want to deviate from POWO by going with Hyptis mutabilis instead of Cantinoa mutabilis? If thats the case, the proper thing to do would be to make another taxon change, not to make IDs, right?

Posted by loarie over 5 years ago

@xanergo Are you suggesting that ALL Cantinoa mutabilis should be called Hyptis mutabilis, or are there some populations that should retain the name "Cantinoa?

Posted by alex_abair over 5 years ago

Yes @alex_abair, all Cantinoa mutabilis should be called Hyptis mutabilis, both names correspond to the same species. The first one derives from a new classification proposal that I, and several other researchers, consider is not strongly supported, and which has been marginally integrated to POWO, i.e., POWO has some few species under the new names proposed, and the majority under the names of the traditional calssification. So, I think it is much better following traditional Hyptis circumscription by now, until a more stable and well supported new classification is presented.

Posted by xanergo over 5 years ago

@xanergo Ah, ok. I was thinking it was only a partial swap based on geography. I'll just swap the names back and hope nobody comes along again and changes it back according to POWO standards.

Posted by alex_abair over 5 years ago

See note here https://www.inaturalist.org/flags/282270
please make deviations as described there if you want to signal curators not to curate in the direction of POWO
And before/in parallel with making a deviation, please contact POWO at bi@kew.org to try to get the change made on the POWO end (good advice from tonyrebelo here https://www.inaturalist.org/flags/590215 on how to work with POWO directly)

Posted by loarie over 1 year ago

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