A new species of Paranecepsia (Euphorbiaceae-Acalyphoideae) from Madagascar and its relationships among the ‘alchorneoids clade’
Abstract
The formerly monotypic genus Paranecepsia Radcl.-Sm. is expanded with the description and illustration of a second species, Paranecepsia andrafiabensis Barberá & O.Lachenaud sp. nov. Molecular phylogenetic analyses of plastid rbcL and trnL-F data confirm a sister relationship between the new species and P. alchorneifolia Radcl.-Sm., as members of the alchorneoids clade. Paranecepsia andrafiabensis sp. nov. is notable for expanding the character states for the genus (now including both 2- and 3-locular ovary species) and broadening the geographic range of the genus from continental Africa to Madagascar. The new species adds to the diverse karst limestone endemics of northwestern Madagascar, where it has a very restricted distribution at the base of the western wall of the Ankarana tsingy. An amended generic description of Paranecepsia and a key to the species are also presented. Paranecepsia andrafiabensis sp. nov. is provisionally assessed as VU D1 based on the IUCN Red List criteria.
References
Bachman S., Moat J., Hill A.W., de la Torre J. & Scott B. 2011. Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. ZooKeys 150: 117–126. https://doi.org/10.3897/zookeys.150.2109
Castillon J.P. & Castillon J.B. 2018. A new threatened species of Euphorbia sect. Goniostema (Euphorbiaceae) from northern Madagascar. Candollea 73 (2): 187–191. [In French.] https://doi.org/10.15553/c2018v732a2
Cervantes A., Fuentes S., Gutiérrez J., Magallón S. & Borsch T. 2016. Successive arrivals since the Miocene shaped the diversity of the Caribbean Acalyphoideae (Euphorbiaceae). Journal of Biogeography 43: 1773–1785. https://doi.org/10.1111/jbi.12790
Darriba D., Taboada G.L., Doallo R. & Posada D. 2012. jModelTest 2: more models, new heuristics and parallel computing. Nature Methods 9: 772. https://doi.org/10.1038/nmeth.2109
Doyle J. 1991. DNA protocols for plants. In: Hewitt G.M., Johnston A.W.B. & Young J.P.W. (eds) Molecular Techniques in Taxonomy: 283–293. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-83962-7_18
Guindon S. & Gascuel O. 2003. A simple, fast and accurate algorithm to estimate large phylogenies by maximum likelihood. Systematic Biology 52: 696–704. https://doi.org/10.1080/10635150390235520
Haevermans T. & Hetterscheid W.L. 2021. Taxonomic changes and new species in Malagasy Euphorbia (Euphorbiaceae). Phytotaxa 492 (1): 1–61. https://doi.org/10.11646/phytotaxa.492.1.1
Hayden W.J. & Hayden S.M. 2000. Wood anatomy of Acalyphoideae (Euphorbiaceae). IAWA Journal 21: 213–235. https://doi.org/10.1163/22941932-90000246
IUCN. 2019. The IUCN Red List of Threatened Species. Ver. 2019-3. Available from http://www.iucnredlist.org [accessed 26 Jan. 2022].
Kainulainen K., van Ee B., Razafindraibe H. & Berry P.E. 2017. A revision of the Adenophorus Group and other glandular-leaved species of Croton (Euphorbiaceae) from northern Madagascar and Mayotte, including three new species. Candollea 72 (2): 371–402. https://doi.org/10.15553/c2017v722a15
Kulju K.K., van der Ham R.W. & Breteler F.J. 2008. Rediscovery and phylogenetic position of the incertae sedis genus Afrotrewia (Euphorbiaceae): morphological, pollen and molecular evidence. Taxon 57 (1): 137–143.
Madagascar Catalogue. 2022. Catalogue of the Vascular Plants of Madagascar. Missouri Botanical Garden, St. Louis, U.S.A. & Antananarivo, Madagascar. Available from http://legacy.tropicos.org/Project/Madagascar [accessed 26 Jan. 2022].
Masa-Iranzo I., Sanmartín I., Caruzo M.B.R. & Riina R. 2021. Skipping the Dry Diagonal: spatio-temporal evolution of Croton section Cleodora (Euphorbiaceae) in the Neotropics. Botanical Journal of the Linnean Society 197 (1): 61–84. https://doi.org/10.1093/botlinnean/boab016
McPherson G. 2017. Six new species of Argomuellera (Euphorbiaceae) from Madagascar. Novon: A Journal for Botanical Nomenclature 25 (3): 286–297. https://doi.org/10.3417/D-16-00008
McPherson G. 2019. Two new species of Madagascan Claoxylon (Euphorbiaceae, Acalyphoideae) and a key to the species of Madagascar and the Comoro Islands. Novon: A Journal for Botanical Nomenclature 27 (3): 145-150. https://doi.org/10.3417/2019425
Montero-Muñoz I., Cardiel J.M. & Levin G.A. 2020. Discovery of three new species of Acalypha L. (Euphorbiaceae, Acalyphoideae) from Madagascar and their conservation status. Systematic Botany 45 (1): 122-130. https://doi.org/10.1600/036364420X15801369352379
Montero-Muñoz I., Levin G.A. & Cardiel J.M. 2022. Four new species of Acalypha L. (Euphorbiaceae, Acalyphoideae) from Madagascar, with notes about their conservation status. South African Journal of Botany 146: 634–642. https://doi.org/10.1016/j.sajb.2021.11.052
Nowicke J.W. & Takahashi M. 2002. Pollen morphology, exine structure and systematics of Acalyphoideae (Euphorbiaceae), part 4: tribes Acalypheae pro parte (Erythrococca, Claoxylon, Claoxylopsis, Mareya, Mareyopsis, Discoclaoxylon, Micrococca, Amyrea, Lobanilia, Mallotus, Deuteromallotus, Cordemoya, Cococceras, Trewia, Neotrewia, Rockinghamia, Octospermum, Acalypha, Lasiococca, Spathiostemon, Homonoia), Plukenetieae (Haematostemon, Astrococcus, Angostyles, Romanoa, Eleutherostigma, Plukenetia, Vigia, Cnesmone, Megistostigma, Sphaerostylis, Tragiella, Platygyna, Tragia, Acidoton, Pachystylidium, Dalechampia), Omphaleae (Omphalea), and discussion and summary of the complete subfamily. Review of Paleobotany and Palynology 121: 231–336. https://doi.org/10.1016/S0034-6667(02)00087-8
Radcliffe-Smith A. 1975. Notes on African Euphorbiaceae VI. Kew Bulletin 30: 675–687. https://doi.org/10.2307/4102909
Radcliffe-Smith A. 1987. Euphorbiaceae (Part I). In: Polhill R.M. (ed.) Flora of Tropical East Africa. A.A. Balkema, Rotterdam, The Netherlands & Boston, USA.
Radcliffe-Smith A. 2001. Genera Euphorbiacearum. Royal Botanic Gardens, Kew, UK.
Rambaut A., Suchard M.A., Xie D. & Drummond A.J. 2014. Tracer v.1.7.1. Available from http://beast.bio.ed.ac.uk/Tracer [accessed 10 Dec. 2021].
Ronquist F., Teslenko M., Van der Mark P., Ayres D., Darling A., Höhna S., Larget B., Liu L., Suchard M.A. & Huelsenbeck J.P. 2012. MrBayes 3.2: efficient Bayesian phylogenetic inference and model choice across a large model space. Systematic Biology 61: 539–542. https://doi.org/10.1093/sysbio/sys029
Silva O.L.M., Riina R. & Cordeiro I. 2020. Phylogeny and biogeography of Astraea with new insights into the evolutionary history of Crotoneae (Euphorbiaceae). Molecular Phylogenetics and Evolution 145: 106738. https://doi.org/10.1016/j.ympev.2020.106738
Thiers B. continuously updated. Index Herbariorum: A Global Directory of Public Herbaria and Associated Staff. New York Botanical Garden’s Virtual Herbarium. Available from http://sweetgum.nybg.org/science/ih/ [accessed 10 Jan. 2021].
Tokuoka T. 2007. Molecular phylogenetic analysis of Euphorbiaceae sensu stricto based on plastid and nuclear DNA sequences and ovule and seed character evolution. Journal of Plant Research 120: 511–522. https://doi.org/10.1007/s10265-007-0090-3
Turland N.J., Wiersema J.H., Barrie F.R., Greuter W., Hawksworth D.L., Herendeen P.S., Knapp S., Kusber W.-H., Li D.-Z., Marhold K., May T.W., McNeill J., Monro A.M., Prado J., Price M.J. & Smith G.F. (eds) 2018. International Code of Nomenclature for Algae, Fungi, and Plants (Shenzhen Code) Adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. Regnum Vegetabile 159. Koeltz Botanical Books, Glashütten. https://doi.org/10.12705/Code.2018
van Welzen P.C., Arias Guerrero S., Arifiani D., Bangun T.J., Bouman R.W., Eurlings M.C., Gushilman I., Phillipson P.B., Tabak I., Winkel E. & Wurdack K.J. 2020. Weda, a new genus with two new species of Euphorbiaceae–Crotonoideae from Halmahera (North Maluku, Indonesia) and phylogenetic relationships of the Australasian tribe Ricinocarpeae. Journal of Systematics and Evolution 59 (5): 1000–1017. https://doi.org/10.1111/jse.12581
Vorontsova M.S. & Hoffmann P. 2007. First record of pistillate flowers of Paranecepsia (Euphorbiaceae sensu stricto). Kew Bulletin 62 (2): 285–286.
Webster G.L. 1994. Synopsis of the genera and suprageneric taxa of Euphorbiaceae. Annals of the Missouri Botanical Garden 81 (1): 33–144. https://doi.org/10.2307/2399909
Webster G.L. 2014. Euphorbiaceae. In: Kubitzki K. (ed.) The Families and Genera of Vascular Plants. Vol. 11: Flowering Plants, Eudicots, Malpighiales: 51–216. Springer Verlag, Berlin, Heidelberg, Germany. https://doi.org/10.1007/978-3-642-39417-1_10
Wurdack K.J., Hoffmann P. & Chase M.W. 2005. Molecular phylogenetic analysis of uniovulate Euphorbiaceae (Euphorbiaceae sensu stricto) using plastid rbcL and trnL-F DNA sequences. American Journal of Botany 92 (8): 1397–1420. https://doi.org/10.3732/ajb.92.8.1397
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