Monday, November 21, 2016

[Botany • 2016] Myrcianthes roncesvallensis • Effectiveness of DNA Barcoding Markers in the Description of A New and Unusual Calyptrate Species of Myrcianthes (Myrtaceae)


Myrcianthes roncesvallensis 
 C. Parra-O. & Bohórquez-Osorio 

  (A) Closed calyx detaching as a unit (C. Parra-O. & A. F. Bohórquez 853), (B) closed calyx tearing in two or three more or less regular lobes (C. Parra-O. & A. F. Bohórquez 849), (C) both types of calyx opening in flowers of the same inflorescence (C. Parra-O. & A. F. Bohórquez 857), (D) tissue remnants from the calyx opening that persist attached to the hypanthium (C. Parra-O. & A. F. Bohórquez 852), (E) remnants of the calyx in the fruit (C. Parra-O. & A. F. Bohórquez 852), (F) remnants of the calyx in the fruit (C. Parra-O. & A. F. Bohórquez 856).

Photos: A. F. Bohórquez (A); C. Parra-O. (B, C, D, E, and F). Scale bar = 5 mm.

Abstract

A new species, Myrcianthes roncesvallensis is described and illustrated from Andean forests of Tolima, Colombia. Due to the unusual combination of morphological characters in this new species never been found previously in a Colombian Myrtaceae, such as having a closed calyx, dichasial inflorescence and an eugenioid embryo, three DNA barcoding markers (rbcL, matK and ITS) were used to confirm the genus in which this species should be described. Taxonomic affinities of the new species within the genus are discussed.

Keywords: Calyx morphology, Colombia, Eugenia group, Neotropics, Eudicots




 Carlos Parra-O and A. F. Bohórquez-Osorio. 2016. Effectiveness of DNA Barcoding Markers in the Description of A New and Unusual Calyptrate Species of Myrcianthes (Myrtaceae).
Phytotaxa. 284(3); 203–210.   DOI:  10.11646/phytotaxa.284.3.5

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