Based on a systematic study of the Mexican species in the Tillandsia viridiflora complex, the taxonomic and nomenclatural status of these species is clarified. The former synonym T. macropetala is reestablished as a species. An identification key for the complex…

Two new species of squash bees, Peponapis pacifica Ayala and Griswold sp. n. and P. parkeri Griswold and Ayala sp. n., are described and illustrated. Peponapis pacifica is oligolectic on flowers of Schizocarpum longisepalum (Cucurbitaceae) endemic to Mexico, where it…

Descriptions of 13 green and 12 brown algal species from 20 genera and 15 families collected on Cabezo Reef of the National Park Sistema Arrecifal Veracruzano in the southwestern Gulf of México, which are new records for the reef, are…

The small Maastrichtian coral fauna of Ocozocoautla (Chiapas, Mexico) is being taxonomically reviewed. In contrast to an older study, the material is examined by preparing thin sections and carrying out systematic measurements to ensure that any comparisons of the material…

Twenty one species and subspecies of Exetastes Grav. are recorded from Mexico. Exetastes arteagus sp. nov., E. gauldi sp. nov. and E. lascivus sp. nov. are described as new. Exetastes pasculus Gauld et Ugalde is recorded for the first time…

A new genus and species of thrips, Fourbethrips fiorella, inhabiting stems, petioles and leaf vein galls of a Melastomataceae from Costa Rica is described. The galls are induced by an unidentified gall midge larva (Cecidomyiidae). This new thrips can be…

In order to evaluate the risk for marine ecosystem and human health, the diversity and morphology of diatoms of the genus Pseudo-nitzschia were studied. Weekly sampling was performed at seven geo-referenced sites in the National Park Sistema Arrecifal Veracruzano, SW…