Abstract
AbstractThe spores of the monospecific genus Hattorioceros are ovoid to spheroid with canaliculate–striate surface ornamentation, and are unique among hornworts. We determine here for the first time the phylogenetic position of the genus using sequence data from the chloroplast rbcL and mitochondrial nad5 genes. Hattorioceros is nested within Phaeoceros, challenging its taxonomic status. Although spore morphology is a key feature in hornwort taxonomy, our results suggest that caution must be taken when describing taxa above the species level based solely on a single character.
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