First Insight into Groundwater Copepods of the Polish Lowland
2021
Maciej Karpowicz | Sabina Smolska | Magdalena Świsłocka | Joanna Moroz
Our results are the first insight into groundwater copepods of the Polish Lowland. The sampling was conducted in 28 wells in north-eastern Poland, and Copepoda were present in 16 wells. We have identified six Copepoda species and one Cladocera. We have classified four species as stygophiles—<i>Eucyclops serrulatus</i>, <i>Diacyclops bisetosus</i>, <i>Diacyclops crassicaudis</i>, and <i>Cyclops furcifer</i>. These species were frequently found in studied wells of different regions of north-eastern Poland, often in high numbers, and females with egg sacs were observed. We present a detailed morphological description of these species, together with molecular characteristics based on mitochondrial DNA markers (COI gene) for <i>E</i>. <i>serrulatus</i>, <i>D</i>. <i>bisetosus,</i> and <i>D</i>. <i>crassicaudis,</i> and 12S ribosomal RNA for <i>C</i>. <i>furcifer</i>. We also present the development of abnormal structures in one specimen of <i>D. crassicaudis</i>, where the upper part of furcal rami was fused to form a single plate.
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