BACKGROUND The records of genus Bubopsis McLachlan, 1898 with species Bubopsis tancrei Weele, 1908 and the genus Nousera Navás, 1923 with species Nousera gibba Navás, 1923 have not been published in China. NEW INFORMATION The genus Bubopsis McLachlan, 1898 with species Bubopsis tancrei Weele, 1908 and the genus Nousera Navás, 1923 with species Nousera gibba Navás, 1923 are recorded for the fi...

The article presents the results of studies a series species identifications genus Lemna (Lemnaceae) conducted in 2019. Duckweed samples were taken from eight localities northern regions Ukraine and identified to using morphological molecular markers (barcoding). A new alien duckweed for Ukraine—lesser (Lemna aequinoctialis Welw.)—was discovered, which this study is devoted. All other belonged ...

The New World genus Lepidosina Marshall & Buck gen. n. is described including nine new and two previously described species: L. angusticercus Marshall & Buck sp. n. (Caribbean, Central and South America), L. argentinensis Marshall & Buck sp. n. (Argentina), L. cubensis Marshall & Buck sp. n. (Cuba), L. evanescens Marshall & Buck sp. n. (Central and South America), L. gibba (Spuler) comb. n. (Fl...

Variation in the currently recognized species, Barbatula nuda (Bleeker 1865), from North China was studied, and three distinct species are identified: B. nuda, B. toni, and B. gibba sp. nov.. The name B. nuda is presently misapplied; this species is distinct from B. toni, a species widely distributed in Northeast China, and occurs only in the Liao-He basin of Liaoning Province and the Tumen-Jia...

Effluent ‘Coda’ originating from palmyrah toddy distillery units is the major source of environmental pollution in the Jaffna district of Sri Lanka. Spent wash produced from distilleries is rich in organic material and characteristically less toxic. A research was carried out to find the optimal dilution factor of the effluent before discharge through construction of wet lands which is a new, e...