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Argyropelecus hemigymnus Cocco, 1829. Spurred Hatchetfish. To 4.9 cm (1.9 in) TL or more (Mecklenburg et al. 2018). Circumglobal; western Pacific Ocean north to Japan (Aizawa in Nakabo 2002) and Russian northwestern Pacific (Orlov and Tokranov 2019); Washington (Matarese et al. 1989) to Chile (Baird 1971). Depth: 50���3,065 m (164���10,053 ft) (min.: Mecklenburg et al. 2018; max.: Porteiro et al. 2017)., Published as part of Love, Milton S., Bizzarro, Joseph J., Cornthwaite, Maria, Frable, Benjamin W. & Maslenikov, Katherine P., 2021, Checklist of marine and estuarine fishes from the Alaska-Yukon Border, Beaufort Sea, to Cabo San Lucas, Mexico, pp. 1-285 in Zootaxa 5053 (1) on page 56, DOI: 10.11646/zootaxa.5053.1.1, http://zenodo.org/record/5578008, {"references":["Mecklenburg, C. W., Lynghammar, A., Johannesen, E., Byrkjedal, I., Christiansen, J. S., Dolgov, A. V., Karamushko, O. V., Mecklenburg, T. A., Moller, P. R., Steinke, D. & Wienerrolther, R. M. (2018) Marine Fishes of the Arctic Region. Conservation of Arctic Flora and Fauna, Akureyrl.","Nakabo, T. (Ed.). (2002) Fishes of Japan with Pictorial Keys to the Species. Tokai University Press, Tokyo.","Orlov, A. M. & Tokranov, A. M. (2019) Checklist of deep-sea fishes of the Russian northwestern Pacific Ocean found at depths below 1000 m. Progress in Oceanography, 176, https: // doi. org / 10.1016 / j. pocean. 2019.102143","Matarese, A. C., Kendall Jr., A. W., Blood, D. M. & Vintner, B. M. (1989) Laboratory guide to early life history stages of northeast Pacific fishes. NOAA Technical Report NMFS, 80.","Baird, R. C. (1971) The systematics, distribution, and zoogeography of the marine hatchetfishes (family Sternoptychidae). Bulletin of the Museum of Comparative Zoology, 142, 1 - 128.","Porteiro, F. M., Sutton, T., Byrkjedal, I., Orlov, A. M. & Heino, M. (2017) Fishes of the northern Mid-Atlantic Ridge collected during the MAR-ECO cruise in June - July 2004: an annotated checklist. Arquipelago, Supplement 10."]}

The recent paper by Artüz & Fricke (2019) is focused on the analysis of marine teleost fishes of the Sea of Marmara, where they have tried to correct doubtful species occurrences and presented an annotated checklist. In a few cases, the authors have provided convincing data for the removal of some species from the regional inventory, such as Apogon imberbis (Linnaeus, 1758), Scomberesox saurus (Walbaum, 1792) and Polyprion americanus (Bloch & Schneider, 1801), and pointed out revision-seeking genera (i.e. Alosa spp., Pegusa spp., etc.), which should certainly be taken into consideration. However, the paper also raises several doubts resulting from mistranslations of some previous research, misinterpretation and incomplete examination of certain published biodiversity data related to the Sea of Marmara. Despite the authors presented a number of mistaken first record data (for example Sardinella aurita Valenciennes, 1837, for full account see Bilecenoglu et al. 2002), included some unsubstantiated/questionable species (such as Symphodus melops (Linnaeus, 1758), Gobius vittatus Vinciguerra, 1883, etc.), and unexpectedly neglected the occurrence of some common coastal and deepsea species from the area, such as Arnoglossus kessleri Schmidt, 1915, Gobius bucchichi Steindachner, 1870, Labrus merula Linnaeus, 1758, Parablennius zvonimiri (Kolombatović, 1892) and Argyropelecus hemigymnus Cocco, 1829, I herein concentrate solely on the erroneous/invalid records (totaling 42 fish species) with appropriate explanations.

Argyropelecus hemigymnus Cocco, 1829 Argyropelecus hemigymnus Cocco, 1829: 146. Type locality: Messina, Sicily, Italy. Argyropelecus hemigymnus, Galil & Goren, 1994: 49; Goren & Galil, 1997: 201, 2002: 151. Distribution. Circumglobal; depth range 0���2400 m., Published as part of Goren, Menachem & Galil, Bella S., 2015, A checklist of the deep sea fishes of the Levant Sea, Mediterranean Sea, pp. 507-530 in Zootaxa 3994 (4) on page 520, DOI: 10.11646/zootaxa.3994.4.2, http://zenodo.org/record/244394, {"references":["Galil, B. S. & Goren, M. (1994) The deep sea Levantine Fauna. New records and rare occurrences. Senckenbergiana Maritima, 25, 41 - 52.","Goren, M. & Galil, B. S. (1997) New records of deep-sea fishes from the Levant Basin and a note on the deep-sea fishes of the Mediterranean. Israel Journal of Zoology, 43, 197 - 203."]}

* Argyropelecus hemigymnus Cocco, 1829 – Hatchetfish; Pai-velho ①②③, Published as part of Carneiro, Miguel, Martins, Rogélia, Landi, Monica & Costa, Filipe O., 2014, Updated checklist of marine fishes (Chordata: Craniata) from Portugal and the proposed extension of the Portuguese continental shelf, pp. 1-73 in European Journal of Taxonomy 73 on page 24, DOI: 10.5852/ejt.2014.73, http://zenodo.org/record/3866515

Argyropelecus hemigymnus Cocco 1829 (Fig. 2 D; Table 2) Material examined. 5 specimens (20.2 ���29.0 mm SL): MNRJ 30141, 1(20.2 mm), E-0507; MNRJ 30351, 2(25.2 ���29.0 mm), AG 1-7.2; MNRJ 30358, 1(24.1 mm), AG 1-12; MNRJ 30360, 1(28.5 mm), AG 2-9. Additional material. 5 specimens (17.1���27.6 mm SL; REVIZEE Program, mid-water trawl): MZUSP 78223, 4(20.0��� 27.6 mm), 31 ��04��� 25 ������S, 49 �� 15 ���05������W, 29.xi. 1999; MZUSP 80523, 1(17.1 mm), 26 �� 16 ��� 29 ������S, 45 �� 46 ��� 35 ������W, 07.x. 1999. Diagnosis. Argyropelecus hemigymnus can be differentiated from its congeners by the following combination of characters: small size, rarely larger than 38 mm SL; trunk long and narrow; a single well developed post-abdominal spine, directed posteriorly, with both margins serrated. Meristic description. Fin rays: D 8; A 10���11; P 1 10. Gill rakers: 19���21 (7���9 + 1���2 + 10���11). Photophores: BR 6; I 6; AB 12; SAB 6; PAN 4; AN 6; SC 4; SP 2. Distribution. Worldwide in tropical, subtropical, and subpolar waters. This species occurs along the entire Brazilian coast., Published as part of Lima, Adriano T., Costa, Paulo A. S., Braga, Adriana C., Nunan, Gustavo W. A. & Mincarone, Michael M., 2011, Fishes of the family Sternoptychidae (Stomiiformes) collected on the Brazilian continental slope between 11 �� and 23 �� S, pp. 34-48 in Zootaxa 2742 on page 40, DOI: 10.5281/zenodo.206673

Argyropelecus hemigymnus Cocco, 1829 Aegean Sea: 5000-90 (1 spc.), 24.01.1969, G��kova Bay, 430 m, M. Demir., Published as part of Nurettin Meri��, L��tfiye Eryilmaz & M��fit ��zulug, 2007, A catalogue of the fishes held in the Istanbul University, Science Faculty, Hydrobiology Museum., pp. 29-54 in Zootaxa 1472 on page 37

Argyropelecus hemigymnus Cocco, 1829 Aegean Sea: 5000-90 (1 spc.), 24.01.1969, Gökova Bay, 430 m, M. Demir.

40. Argyropelecus hemigymnus, Cocco. Argyropelecus hemigymnus, Cocco, Giorn. Sc. Sic. 1829, fasc. 77, p. 146.Bonaparte, Faun. Ital. Pesc.Cuv. & Val., Ilist. Nat. Poiss., XXII. p. 398. G��nther, Cat. Fish. Brit. Mus., V. p. 385. Sternoptyx hemigymnus, Valenciennes, in Cuvier, Regne Animal, 111. Poiss., PI. 103, fig. 3.? Sternoptyx mediterr��neo., Cocco, Giorni il Faro, 1838, IV. p. 7, fig. 2.Bonaparte, Faun. Ital. Pesc., Fig. This species was obtained at Station 315, at a depth of 225 fathoms. It was also obtained by the steamer " Fish Hawk," August 18, 1882, at Station 1112 (Lat. 39�� 5(3' N., Long. 70�� 35' W., 245 fathoms), and was seen by Dr. Bean on the same vessel in 18S0., Published as part of Goode, G. B. & Bean, T. H., 1883, Reports on the results of dredging under the supervision of Alexander Agassiz, on the east coast of the United States, during the summer of 1880, by the U. S. coast survey steamer " Blake, " Commander J. R. Bartlett, U. S. N., commanding., pp. 183-226 in Bulletin of the Museum of Comparative Zoology at Harvard College 10 (5) on page 220, DOI: 10.5281/zenodo.28095