biostudies-literatureUnknown1136Miller KBNineteen new species of <i>Desmopachria</i> Babington, 1841 are described from multiple species groups. Two new species groups are erected, the <i>Desmopachriaapicodente</i> species group and the <i>Desmopachriabifurcita</i> species group. <i>Desmopachriadivergens</i> <b>sp. nov.</b> (Venezuela), <i>Desmopachrialineata</i> <b>sp. nov.</b> (Venezuela), <i>Desmopachriasurinamensis</i> <b>sp. nov.</b> (Suriname), and <i>Desmopachriatenua</i> <b>sp. nov.</b> (Guyana) are described in <i>Desmopachria</i> but are not assigned to a species group. <i>Desmopachriaapicodente</i> <b>sp. nov.</b> (Guyana, Venezuela), <i>Desmopachrialateralis</i> <b>sp. nov.</b> (Venezuela), and <i>Desmopachriatumida</i> <b>sp. nov.</b> (Venezuela) are described in the new <i>Desmopachriaapicodente</i> species group and are the only members of the group. <i>Desmopachriabifurcita</i> <b>sp. nov.</b> (Peru), and <i>Desmopachrialata</i> <b>sp. nov.</b> (Brazil) are described in the new <i>Desmopachriabifurcita</i> group. Other members of the <i>Desmopachriabifurcita</i> group are <i>Desmopachriabifasciata</i> Zimmermann, <i>Desmopachriabolivari</i> Miller, <i>Desmopachriaovalis</i> Sharp, and <i>Desmopachriavarians</i> (each previously "ungrouped"). <i>Desmopachriapseudocavia</i> <b>sp. nov.</b> (Venezuela) is described in the <i>Desmopachriaconvexa-signata</i> species group. <i>Desmopachriawolfei</i> <b>sp. nov.</b> (Venezuela) is described in the <i>Desmopachrianitida</i> species group. <i>Desmopachriaangulata</i> <b>sp. nov.</b> (Guyana, Suriname), <i>Desmopachriaemarginata</i> <b>sp. nov.</b> (Guyana, Suriname, Venezuela), <i>Desmopachriaimparis</i> <b>sp. nov.</b> (Guyana), <i>Desmopachriaimpunctata</i> <b>sp. nov.</b> (Suriname, Venezuela), and <i>Desmopachriatruncata</i> <b>sp. nov.</b> (Guyana, Suriname) are described in the <i>Desmopachriaportmanni-aldessa</i> species group. <i>Desmopachriabisulcata</i> <b>sp. nov.</b> (Suriname), and <i>Desmopachriairregulara</i> <b>sp. nov.</b> (Venezuela) are described in the <i>Desmopachriaportmanni-portmanni</i> species group. <i>Desmopachriarobusta</i> <b>sp. nov.</b> (Venezuela) is described in the <i>Desmopachriastriola</i> species group. A key to the species groups is included. Male genitalia are figured for all new species and dorsal habitus images are provided for most new species.ZooKeys1-56https://www.ebi.ac.uk/biostudies/studies/S-EPMC9836737biostudies-literatureNineteen new species of <i>Desmopachria</i> Babington, 1841 (Coleoptera, Adephaga, Dytiscidae, Hydroporinae, Hyphydrini) with notes on the taxonomy of the genus.PMC9836737Miller KBfalseNineteen new species of <i>Desmopachria</i> Babington, 1841 (Coleoptera, Adephaga, Dytiscidae, Hydroporinae, Hyphydrini) with notes on the taxonomy of the genus.Nineteen new species of <i>Desmopachria</i> Babington, 1841 are described from multiple species groups. Two new species groups are erected, the <i>Desmopachriaapicodente</i> species group and the <i>Desmopachriabifurcita</i> species group. <i>Desmopachriadivergens</i> <b>sp. nov.</b> (Venezuela), <i>Desmopachrialineata</i> <b>sp. nov.</b> (Venezuela), <i>Desmopachriasurinamensis</i> <b>sp. nov.</b> (Suriname), and <i>Desmopachriatenua</i> <b>sp. nov.</b> (Guyana) are described in <i>Desmopachria</i> but are not assigned to a species group. <i>Desmopachriaapicodente</i> <b>sp. nov.</b> (Guyana, Venezuela), <i>Desmopachrialateralis</i> <b>sp. nov.</b> (Venezuela), and <i>Desmopachriatumida</i> <b>sp. nov.</b> (Venezuela) are described in the new <i>Desmopachriaapicodente</i> species group and are the only members of the group. <i>Desmopachriabifurcita</i> <b>sp. nov.</b> (Peru), and <i>Desmopachrialata</i> <b>sp. nov.</b> (Brazil) are described in the new <i>Desmopachriabifurcita</i> group. Other members of the <i>Desmopachriabifurcita</i> group are <i>Desmopachriabifasciata</i> Zimmermann, <i>Desmopachriabolivari</i> Miller, <i>Desmopachriaovalis</i> Sharp, and <i>Desmopachriavarians</i> (each previously "ungrouped"). <i>Desmopachriapseudocavia</i> <b>sp. nov.</b> (Venezuela) is described in the <i>Desmopachriaconvexa-signata</i> species group. <i>Desmopachriawolfei</i> <b>sp. nov.</b> (Venezuela) is described in the <i>Desmopachrianitida</i> species group. <i>Desmopachriaangulata</i> <b>sp. nov.</b> (Guyana, Suriname), <i>Desmopachriaemarginata</i> <b>sp. nov.</b> (Guyana, Suriname, Venezuela), <i>Desmopachriaimparis</i> <b>sp. nov.</b> (Guyana), <i>Desmopachriaimpunctata</i> <b>sp. nov.</b> (Suriname, Venezuela), and <i>Desmopachriatruncata</i> <b>sp. nov.</b> (Guyana, Suriname) are described in the <i>Desmopachriaportmanni-aldessa</i> species group. <i>Desmopachriabisulcata</i> <b>sp. nov.</b> (Suriname), and <i>Desmopachriairregulara</i> <b>sp. nov.</b> (Venezuela) are described in the <i>Desmopachriaportmanni-portmanni</i> species group. <i>Desmopachriarobusta</i> <b>sp. nov.</b> (Venezuela) is described in the <i>Desmopachriastriola</i> species group. A key to the species groups is included. Male genitalia are figured for all new species and dorsal habitus images are provided for most new species.2022-01-01T00:00:00Z20222025-04-18T21:16:40.079Z2025-04-07T09:16:48.745ZS-EPMC98367373676205010.3897/zookeys.1136.72744