Taxonomic revision of the Southeast Asian brook barb genus Smith, 1931 (Teleostei, Cyprinidae) with description of a new species from Vietnam.

Molecular data from samples encompassing 22 nominal species of indicate that the species-level diversity in the genus has been vastly overestimated, likely due to inadequate taxon and geographic sampling and reliance on morphological characters that vary intra-specifically. The latter includes discrete mouth morphologies related to alternate feeding strategies (ecomorphs) within populations. One new species is described, Hoàng, Phạm & Trần, , and 17 synonyms of six valid species names of , , , , , , and , are recognised.

An updated infrageneric classification of the pantropical species-rich genus L. (Clusiaceae) and some insights into the systematics of New Caledonian species, based on molecular and morphological evidence.

L. is a pantropically distributed genus comprised of at least 250 species of shrubs and trees and has centers of diversity located in Africa/Madagascar, Australasia, and Southeast Asia. The genus is notable due to its extreme diversity of floral form, common presence in lowland tropical rainforests worldwide, and potential pharmacological value.