Palynomorphometry in ferns: Ctenitis (C. Chr.) C. Chr. (Dryopteridaceae), a case of study in the Southern Cone of America.

DANIEL ALEJANDRO GORRER

RODRIGUESIA

Instituto de Pesquisas Jardim Botânico do Rio de Janeiro

Lugar: Rio de Janeiro; Año: 2023

0370-6583

The morphometric knowledge about the spores of the Ctenitis has not yet been deepened.Considering the folded spores of this genus which inhabit the Southern Cone of America theaims were to increase infrageneric knowledge, to evaluate the relationship among themorphometric characters of the folded spores in these Ctenitis species and to verify thespore’s morphometry as a taxonomic tool. This study was performed with herbarium material.The spores were analyzed with LM and SEM. The variables analyzed were: major and minorequatorial diameter, polar diameter, length of the laesura and length, width and height of thefolds. The test chosen to analyze the study variables was ANOVA. Four spore sets areproposed. The "elongate-type" is made up of C. aspidioides and C. nervata. The "mediumtype" is made up of C. anniesii, C. distans, C. falciculata and C. paranaensis. The “handleshape-type” is represented by C. bigarellae, C. eriocaulis and C. submarginalis. Finally, the"short-type", consists only of C. deflexa. The morphometric data of spores together with thestatistical analysis provided useful information for the distinction of some Ctenitis speciesstudied in the Southern Cone of America. These results contribute to the studiesaeropalynologycal and palaeopalynological.