Hirstiella jimenezi new species is described from specimens found on the gecko Phyllodactylus bordai Taylor in the southern part of Mexico and also recorded from a single specimen of P. tuberculosus magnus Taylor. The female, male, deutonymph, and larva are…

Serotiny, or delayed seed dispersal, is common in fluctuating environments because it hedges the risks of establishment. Mammillaria pectinifera (Cactaceae) facultatively expels fruits in the year they are produced or retains them to disperse the seed over several years. We…

A new nematode species, Freitascapillaria moraveci n. sp., is described; it was obtained from specimens recovered from the gall bladder of the 2spot livebearer Heterandrá bimaculata (Heckel, 1848) from La Antigua River, State of Veracruz, Mexico. The new species is…

A new, miniaturized species of Phyllodactylus Gray from Guerrero, Mexico is described. The species appears to be the smallest American species of leaftoed gecko. The diploid karyotype consists of a graded series of 36 acrocentric and 2 subtelocentric chromosomes; the…

Gyrodactylus mexicanus n. sp. and Gyrodactylus lamothei n. sp. are described from the fins and skin of Girardinichthys multiradiatus, an endemic freshwater fish from central Mexico. Gyrodactylus mexicanus is compared to other Gyrodactylus species that parasitize Fundulus spp., the phylogenetically…

Recent studies of the Asclepiadoideae (Apocynaceae) in southern and western Mexico have revealed a new species here described and illustrated as Gonolobus spiranthus JuarezJaimes, W. D. Stevens & Lozada-Perez. This species is distinguished by having a tubular corolla more than…

A revision of the species of Lonchocarpus Kunth sect. Obtusifolii (Bentham) M. Sousa (Leguminosae, Papilionoideae, Millettieae) is presented for Mesoamerica. Of the 12 recognized species, five that are new to science, L. canoensis M. Sousa, L. foveolatus M. Sousa, L.…

An account of section Punctati Bentham for the genus Lonchocarpus Kunth in Mesoamerica is given. Of the 12 species treated, five are new to science, and one new combination is made, L. vallicola (Standley & F. J. Hermann) M. Sousa.…

Anewspecies of Opuntia (L.) Miller (Cactaceae), endemic to the region of Cuicatlân in the state of Oaxaca, Mexico, is described. The fruits are redviolet with long spines, funiculi that are almost dry, and fruit walls that are edible and do…

Knowledge of the population dynamics of tropical trees has expanded considerably in the past 20 years. An important observation deriving from these investigations is the confirmation that population behaviour varies both in time and space. A tool recently developed to…