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Disentangling the identity of Zamia from Mexican Pacific seaboard, with a description of a new species
Author(s) -
NicolaldeMorejón Fernando,
MartínezDomínguez Lilí,
Stevenson Dennis Wm.,
VergaraSilva Francisco
Publication year - 2019
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/njb.02430
Subject(s) - biology , sympatry , strobilus , botany , key (lock) , typification , taxonomy (biology) , ecology , nomenclature , sympatric speciation
We present a revision based on qualitative and quantitative morphological comparisons including all populations of Zamia from the coastal plain of Pacific Mexico. We recognize four species in this area: Z. paucijuga , Z. herrerae , Z. spartea and the new species Z. stenophyllidia which is described from Michoacán, Mexico. Zamia stenophyllidia has is distinct with respect to both vegetative and reproductive structures; namely, linear, lanceolate, papyraceous and narrow leaflets (up to 0.8 cm wide), robust and short prickles (up to 2 mm), and ovoid, yellowish, ovulate strobili. The description of this species implies a recircumscription of Z. paucijuga ; on this basis, an epitype for Z. paucijuga is designated here. We also introduce a key for all species of Zamia from Mexico. Biogeographically, the new species is interesting for its sympatry with Dioon stevensonii , a species that has been a model for the study of the formation of modern Neotropical forests.