Abstract

VALDES IBARRA, Christian; MUNGUIA LINO, Guadalupe  and  RODRIGUEZ, Aarón. Species richness and geographic distribution of the subtribe Hippeastrinae (Amaryllidaceae) in México. Bol. Soc. Argent. Bot. [online]. 2023, vol.58, n.3, pp.3-3. ISSN 1851-2372.  http://dx.doi.org/10.31055/1851.2372.v58.n3.39719.

Background and aims: Hippeastrinae originated in South America and then migrated to North America. Mexico represents a center of diversity of the group and the Mexican Transition Zone concentrates the highest species richness. The aims of this work were to estimate the species richness of Hippeastrinae in Mexico, to analyze the geographic distribution and to identify areas of richness.

M&M: A database was created from herbarium specimens, electronic resources, and literature. Using geographic information systems, we estimated the species richness and distribution by state, region and biogeographic province; vegetation type, latitude, longitude and elevation. Additionally, the species richness was analyzed using a grid cell of 50 x 50 km2.

Results: Fourty-five species of Hippeastrinae occur in Mexico. The database integrated 1359 georeferenced records. Hippeastrinae was recorded in 31 states, in all regions, biogeographic provinces and vegetation types. It occurs from 15.9 to 31.8° latitude, from 88.2 to 118.3° longitude and from 0 to 3508 m a.s.l. San Luis Potosí had the greatest species richness and endemism. The Neotropical region host the largest number of species. The Sierra Madre Oriental province harbors the greatest species richness and the richest cells. The group resulted particularly diverse in coniferous and oak forest, xeric shrubland and agriculture-aquaculture farmland.

Conclusions: Hippeastrinae exhibit a modern neotropical pattern of richness and distribution. The species richness and endemism were concentrated in the Neotropical region and the Mexican Transition Zone. The Sierra Madre Oriental is a center of diversity of the group.

Keywords : Biogeography; geographic information system; Sierra Madre Oriental; Sprekelia; Zephyranthes.

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