Nemadiopsis

Peck, Stewart B., Gnaspini, Pedro & Newton, Alfred F., 2020, Updated catalog and generic keys of the Leiodidae (Insecta: Coleoptera) of the Neotropical region (“ Latin America ”: Mexico, the West Indies, and Central and South America), Zootaxa 4741 (1), pp. 1-114 : 33

Key to Subgenera of Nemadiopsis (from Salgado, 2002b)

1a Apex of metatrochanters strongly pointed, generally curved in the male; antennal club segments very separated, segments 8, 9, and 10 transverse; parameres of aedeagus with small setae on internal margin; apical region of spiculum ventrale expanded................................................................................. subgenus Nemadiopsella

1b Apex of metatrochanters weakly pointed, never curved; antennal club segments weakly or not separated, segments transverse, but different from the previous ones; parameres of aedeagus lacking setae on internal margin; apex of spiculum ventrale with parallel sides and a rounded apex......................................................................... 2

2a Genital segment as long or slightly longer than wide; lateral margins of median lobe of aedeagus bearing setae; basal lamina of aedeagus longer than median lobe; ventrite VII of female abdominal segment with a lobe on median posterior margin; spermatheca membranous, and shaped like an elongated sac...................................... subgenus Nemadiopsicus

2b Genital segment wider than long; lateral margins of median lobe of aedeagus lacking setae; basal lamina of aedeagus shorter than median lobe; ventrite VII of female abdominal segment widely arched, and lacking a lobe; spermatheca formed by two clearly visible sclerotized lobes......................................................... subgenus Nemadiopsis