20.500.12556/DiRROS-22776 Two new species of Nitocrella (Copepoda, Harpacticoida) from a spring in Loei Province, northeastern Thailand Two new species of the genus Nitocrella are described from a karstic spring in Loei Province, northeast Thailand. They are the first representatives of the genus Nitocrella Chappuis, 1924, described from Thailand. Nitocrella grandicaudis sp. nov. and N. thailandensis sp. nov. show the peculiar shapes of the inner element of the male P1 basis, the basis of the mandible, and the proximal endite of the maxilla, differing from their congeners. While N. grandicaudis sp. nov. belongs to the chappuisi group according to the absence of a proximal inner seta on the third exopodal segment of the fourth swimming leg, N. thailandensis sp. nov. belongs to the vasconica group because the seta is present on the segment. Despite the low degree of differentiation in morphological characters, the shape of the female caudal ramus and the proximal seta of the male fifth segment of the antennule suggest that N. grandicaudis sp. nov. differs significantly from the other new species in its mating behavior. A detailed description and illustrations of two new species are provided, as well as a discussion on the divergence of both new species. Some comments on the basic understanding of the reproductive behavior of Harpacticoida are included. Ameiridae biodiversity groundwater species karstic springs Nitocrella grandicaudis Nitocrella thailandensis saturated karstic aquifer Southeast Asia true false true Angleški jezik Ni določen Neznano 2025-06-24 12:29:03 2025-06-24 12:29:03 2025-10-24 03:52:09 0000-00-00 00:00:00 2025 0 0 str. 277-303 Vol. 1240 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2025-06-06 591 1313-2989 10.3897/zookeys.1240.151021 240382467 https://doi.org/10.3897/zookeys.1240.151021 1 109f4d81-50e6-11f0-8080-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=33075 RAZ_Boonyanusith_Chaichat_2025.pdf RAZ_Boonyanusith_Chaichat_2025.pdf 1 23D4C61E9A5BBE97C433D8E1491DC1D5 11afa9df4c8f1ceec0350b6633d949d1d8d699af212e09b15661ee934e5d1700 2671884b-50e6-11f0-8080-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=33076 Nacionalni inštitut za biologijo 0 0 0