Derogenes undetermined

• Main Authors: Bouguerche, Chahinez, Huston, Daniel C., Karlsbakk, Egil, Ahmed, Mohammed, Holovachov, Oleksandr
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2024
• Subjects: Biodiversity; Taxonomy; Animalia; Platyhelminthes; Trematoda; Plagiorchiida; Derogenidae; Derogenes; Derogenes undetermined; Arctic
• Online Access: https://doi.org/10.5281/zenodo.12751472; http://treatment.plazi.org/id/3A3487B2552DFFFAFFD4F850FE16FD2B

Mediterranean Derogenes spp. The German parasitologist Prof. Arthur Looss (1861–1923) was among one of the most prolific parasitologists and taxonomists and was known for his “ enthusiasm and energy as a researcher that have probably seldom been surpassed , especially a painstaking attention to detail that is unfortunately rare ” [33]. After his death, his collection was divided between numerous institutions: Smithsonian National Museum of Natural History in Washington (USA), the Natural History Museum in Berlin and the Natural History Museum in Leipzig (Germany), Gothenburg Museum of Natural History and the Swedish Museum of Natural History (Sweden) (see Kuzmina and Holovachov [31]). A part of Looss’ s collection including his archives was sold to the Swedish Museum of Natural History (Naturhistoriska riksmuseet) in Stockholm by his widow, Elise Looss in 1924 [31] and includes slides of which some are actually type material and vials containing trematodes preserved in ethanol, along with several publication-ready drawings and original line drawings. One of the intriguing derogenids that we encountered in this collection, is “ D. limula ” which we described above as Derogenes sp., ex P. tentacularis , collected from off Trieste, Italy, Central Mediterranean. Curiously, we also found line drawings by A. Looss (see Figs. 3A and 3B) labeled as “ Derogenes limula ”, which suggests that he intended to describe Derogenes from P. tentacularis as a new species, with the name “ D. limula ”. We found one specimen (SMNH 208361) for which the measurements are presented in Table 6. The eggs of this “ D. limula ” that we described above as Derogenes sp. are over 40 µm and the species is thus consistent with the “large eggs group”. We compared the measurements of the sole specimen of Derogenes ex P. tentacularis to those of congeneric species from the Mediterranean (Table 6). The single specimen of Derogenes sp. (or “ D. limula ” as initially referred to by A. Looss on the illustrations) ex P. tentacularis differs from D. ...