Ekrixanthera

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Ekrixanthera
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Urticaceae
Tribe: Boehmerieae
Genus: Ekrixanthera
Poinar, Kevan & Jackes
Species

See text.

Ekrixanthera is a genus of extinct plants in the family Urticaceae, tribe Boehmerieae, first described from fossilized flowers from amber. Two species were described: [1]

The genus and species names first appeared in a publication in 2016, but were not validly published under the International Code of Nomenclature for algae, fungi, and plants. A correction was published online in 2021. [2]

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This article contains papers in paleobotany that were published in 2016.

Ekrixanthera ehecatli is a species of extinct plant first described from fossilised flowers from Mexican amber. Its flowers lack pedicels and are pentamerous and staminate; they have a pistillode with reduced pilosity; glabrous heteromorphic tepals with truncate tips. Differentiating it from Ekrixanthera hispaniolae are the presence or absence of a pedicel, the heterotrophic tepals, and the presence or absence of pilosity of its pistillode and tepals. Additionally, the latter characters added to the pentamerous flowers separate the two fossil species from extant genera. Its floral structures indicate an explosive manner of pollen release as well as anemophily. Lepidopterans feeding on this species is suspected during the mid-Tertiary.

Ekrixanthera hispaniolae is a species of extinct plant first described from fossilised flowers from Dominican amber. It has staminate flowers on short pedicels that are pentamerous, with a pilose pistillode, plus heteromorphic pilose tepals. Differentiating it from Ekrixanthera ehecatli are the presence or absence of a pedicel, the heterotrophic tepals, and the presence or absence of pilosity of its pistillode and tepals. Additionally, the latter characters added to the pentamerous flowers separate the two fossil species from extant genera. Its floral structures indicate an explosive manner of pollen release as well as anemophily. Lepidopterans feeding on this species is suspected during the mid-Tertiary.

This article records new taxa of plants that are scheduled to be described during the year 2017, as well as other significant discoveries and events related to paleobotany that are scheduled to occur in the year 2017.

References

  1. Poinar, George; Kevan, Peter G. & Jackes, Betsy R. (2016), "Fossil species in Boehmerieae (Urticaceae) in Dominican and Mexican amber: a new genus (Ekrixanthera) and two new species with anemophilous pollination by explosive pollen release, and possible lepidopteran herbivory", Botany, 94 (8): 599–606, doi:10.1139/cjb-2016-0006, ISSN   1916-2790
  2. Poinar, Jr., George O.; Kevan, Peter G. & Jackes, Betsy R. (2022) [published online 2021], "Correction: Fossil species in Boehmerieae (Urticaceae) in Dominican and Mexican amber: a new genus (Ekrixanthera) and two new species with anemophilous pollination by explosive pollen release, and possible lepidopteran herbivory", Botany, 100 (1): 63–64, doi:10.1139/cjb-2021-0202