A new species of Lachesilla, from Cabrits National Park, St. John's Parish, Dominica, is here described and illustrated. The phallosome is V-shaped, and it is autapomorphic in having the distal ends of the apodeme arms articulated to each clasper. Based…

Four species of Lachesilla, from Mexico and Guatemala, are here described and illustrated. Together with L. asperiforceps García Aldrete, from Mexico, Guatemala and Nicaragua, they constitute the L. asperiforceps species complex, a diagnosis of which is provided, as well as…

DNA barcoding, based in the sequence of a gene from the mitochondria, the Citochrome C oxidase (CO1), has been proved to be an excellent tool to identify many animal groups from invertebrates to vertebrates. After barcode several Cladocera, we gathered…

Taxonomic re-evaluation of the Upper Cretaceous serial planktic foraminiferal genus Laeviheterohelix Nederbragt, 1991 revealed that the genus is polyphyletic. Three genera are recognized, two new, Steineckia n. gen. and Fleisherites n. gen., and one emended, namely Laeviheterohelix. Steineckia n. gen.…

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…