Fruit morphology in Anthurium sect. Pachyneurium from Brazil (Araceae) and its taxonomic implications

IAPT chromosome data 40

“…The species was described just over 12 years ago based on materials collected in the southern part of the state of Bahia (Haigh & al., 2011). Anthurium scandens is an epiphytic species that occurs in the Antilles and the American continent, from southern Mexico to Brazil (Sheffer & al., 1980), where it is reported in the Northern, Northeastern, Southeastern, and Southern regions (Coelho & al., 2023). Our count of 2n = 48 confirms all previous counts for the species (Sheffer & Kamemoto, 1976;Sheffer & Croat, 1983;Vilar & al., 2017).…”

“…ex Schott are morphologically and genetically similar (Andrade & al., 2009), and these numerical differences may be related to difficulties in taxonomic delimitation between these two species or to events of auto-or allopolyploidy. Anthurium raimundii is reported in the states of Espirito Santo, Bahia, and Sergipe (Coelho & al., 2023). Its occurrence in Pernambuco expands its distribution area to the mountain forests in the northern part of the state of Alagoas.…”

“…Anthurium scandens has a remarkably symmetrical karyotype with a predominance of submetacentric chromosomes, as well as some metacentric chromosome pairs. Anthurium sellowianum is a terrestrial habitat plant endemic to the Atlantic Forest in the states of Minas Gerais, Rio de Janeiro, São Paulo, Paraná and Santa Catarina (Coelho & al., 2023). Most of the chromosome numbers reported for this species by Petersen (1989) are 2n = 48, which differs from the number observed in the present study.…”

“…However, despite the divergent counts, the presence of two chromosome pairs with a Nucleolus Organizer Region (NOR) and the formation of quadruplets with four chromosomes of similar size and morphology are consistent with a recent tetraploid origin. Anthurium urvilleanum is an epiphytic plant endemic to the Atlantic Forest with recorded occurrences in the southeastern and southern regions of Brazil, in the states of Rio de Janeiro, São Paulo, Paraná and Santa Catarina (Coelho & al., 2023). There are no previous chromosomal records known for this species, which presented 2n = 38 for the only individual analyzed.…”