Abstract
The family Myrocongridae comprises some of the rarest and least known benthopelagic eel species. It is composed of a single genus, Myroconger Günther, 1870, and five valid species: M. compressus Günther, 1870, from the Atlantic Ocean; M. gracilis Castle, 1991, M. prolixus Castle & Béarez, 1995, and M. nigrodentatus Castle & Béarez, 1995, from the Pacific Ocean; and M. seychellensis Karmovskaya, 2006, from the Indian Ocean. Herein, we report on an additional species from the Atlantic Ocean, Myroconger pietschi n. sp., based on a specimen obtained on the Aracati Bank, North Brazilian ridge, off Ceará State, western South Atlantic. Myroconger pietschi can be diagnosed by having 190 anal-fin rays, a short pectoral fin (16.6% HL), the posterior portion of the ethmovomerine teeth arranged in a single row, teeth on lower and upper pharyngeal tooth plate 24 and 27, and 10 branchiostegal rays.
References
Afonso, P., Porteiro, F.M., Santos, R.S., Barreiros, J.P., Worms, J. & Wirtz, P. (1999) Coastal marine fishes of São Tomé Island (Gulf of Guinea). Arquipélago. Life and Marine Sciences, 17A, 65–92.
Böhlke, E.B. (1989) Methods and terminology. In Böhlke, E.B., (ed.), Fishes of the Western North Atlantic. Memoirs of the Sears Foundation for Marine Research, 1 (9), 1–7.
Brito, A., Herrera, R., Falcón, J.M., García-Charton, J.A., Barquín, J. & Pérez-Ruzafa, A. (1999) Contribución al conocimiento de la ictiofauna de las islas de Cabo Verde. Revista de la Academia Canaria de la Ciencia, 11 (3–4), 27–41.
Buser, T.J., Boyd, O.F., Cortes, A., Donatelli, C.M., Kolmann, M.A., Luparell, J.L., Pfeiffenberger, J.A., Sidlauskas, B.L. & Summers, A.P. (2020) The Natural Historian’s Guide to the CT Galaxy: step-by-step instructions for preparing and analyzing computed tomographic (CT) data using cross-platform, open access software. Integrative Organismal Biology, 2 (1), obaa009.
https://doi.org/10.1093/iob/obaa009
Castle, P.H.J. (1991) First Indo-Pacific record of the eel family Myrocongridae, with the description of a new species of Myroconger. Copeia, 1991 (1), 148–150.
https://doi.org/10.2307/1446258
Castle, P.H.J. & Béarez, P. (1995) Two new species of Myroconger (Anguilliformes, Myrocongridae) from the Pacific Ocean. Cybium, 19 (3), 211–222.
Edwards, A.J. & Glass, C.W. (1987) The fish of Saint Helena Island, South Atlantic Ocean. I. The Shore Fishes. Journal of Natural History, 21, 617–686.
https://doi.org/10.1080/00222938700770381
Fedorov, A., Beichel, R., Kalpathy-Cramer, J., Finet, J., Fillion-Robin, J.-C., Pujol, S., Bauer, C., Jennings, D., Fennessy, F., Sonka, M., Buatti, J., Aylward, S., Miller, J.V., Pieper, S. & Kikinisa, R. (2012) 3D Slicer as an image computing platform for the quantitative imaging network. Magnetic Resonance Imaging, 30, 1323–41.
https://doi.org/10.1016/j.mri.2012.05.001
Fricke, R., Eschmeyer, W.N. & van der Laan, R. (Eds.) (2021) Eschmeyer’s Catalog of Fishes: Genera, Species, References. Electronic Version. Available from: http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatmain.asp(accessed 11 February 2021)
Gill, T.N. (1890) The osteological characteristics of the family Murænidæ. Proceedings of the United States National Museum, 13 (805), 165–170.
https://doi.org/10.5479/si.00963801.13-805.165
González-Herrera, T., Tariche, O., Triaya, R., Monteiro, C., Santana, J.I., Martins, A., González, J.A. & Pajueloa, J.G. (2012) Nuevos datos biométricos de Myroconger compressus (Osteichthyes: Anguilliformes: Myrocongridae) de las Islas Cabo Verde. Revista de Investigación Marina, 19 (6), 571–573.
Günther, A. (1869) Report of a second collection of fishes made at St. Helena by J. C. Melliss, Esq. Proceedings of the Zoological Society of London, 37 (1), 238–239.
https://doi.org/10.1111/j.1469-7998.1869.tb07318.x
Günther, A. (1870) Catalogue of the fishes in the British Museum. Catalogue of the Physostomi, containing the families Gymnotidae, Symbranchidae, Muraenidae, Pegasidae, and of the Lophobranchii, Plectognathi, Dipnoi, Ganoidei, Chondropterygii, Cyclostomata, Lepidocardii in the British Museum, 8, i–xxv + 1–549.
Hazin, F.H., Pires, A.M.A., Santos, A.C.L., Viana, D.F., Viana, D.L., Nunes, D.M., Nunes, I.S.L.B., Coutinho, I.M., Araújo, M.R., Roque, P.C.G., Filho, R.S.C.G., Ferreira, R.C.P. & Basante, V. (2018) Peixes pelágicos e prospecção em águas profundas no Arquipélago de São Pedro e São Paulo. In: Oliveira, J.E.L., Viana, D. & de Souza, M.A.C. (Eds.), Arquipélago de São Pedro e São Paulo: 20 anos de pesquisa. Via Design Publicações/Universidade Federal do Rio Grande do Norte, Recife, PE, pp. 128–124.
Johnson, G.D., Ida, H., Sakaue, J., Sado, T., Asahida, T. & Miya, M. (2011) A ‘living fossil’ eel (Anguilliformes: Protanguillidae, fam. nov.) from an undersea cave in Palau. Proceedings of the Royal Society B, 279 (1730), 934–943.
https://doi.org/10.1098/rspb.2011.1289
Karmovskaya, E.S. (2006) New species of the genus Myroconger, M. seychellensis (Myrocongridae, Anguilliformes) from the western equatorial part of the Indian Ocean. Journal of Ichthyology, 46 (8), 563–565.
https://doi.org/10.1134/S0032945206080029
McCosker, J.E. & Rosenblatt, R.H. (2010) The fishes of the Galápagos Archipelago: an update. Proceedings of the California Academy of Sciences, Series 4, 61 (II), 11, 167–195.
Kikinis, R., Pieper, S.D., Vosburgh, K.G. (2014) 3D Slicer: a platform for subject-specific image analysis, visualization, and clinical support. In: Jolesz, F.A. (Ed.), Intraoperative imaging and image-guided therapy. Springer, New York, New York, pp. 277–289.
https://doi.org/10.1007/978-1-4614-7657-3_19
Melliss, J.C. (1875) St. Helena: a physical, historical, and topographical description of the island, including its geology, fauna, flora, and meteorology. L. Reeve and Co., London, 426 pp.
https://doi.org/10.5962/bhl.title.120102
Menezes, G.M., Tariche, O., Pinho, M.R., Duarte, P.N., Fernandes, A. & Aboim, M.A. (2004) Annotated list of fishes caught by the R/V Arquipélago off the Cape Verde archipelago. Arquipélago. Life and Marine Sciences, 21A, 57–71.
Nelson, G.J. (1966) Gill arches of teleostean fishes of the order Anguilliformes. Pacific Science, 20 (4), 391–408.
Nelson, G.J. (1967) Notes on the Systematic Status of the Eels Neenchelys and Myroconger. Pacific Science, 21 (4), 562–563.
Osório, B. (1893) Estudos ichthyologicos ácerca da fauna dos domínios portuguezes da África. 3.a Nota. Peixes marítimos das ilhas de S. Thomé, do Príncipe e ilheo das Rolas (Continuação do tomo II, Series 1ª, pp. 136, do Jornal de Sciencias Mathematicas Physicas e Naturaes). Jornal de Sciencias Mathematicas, Physicas e Naturaes, Series 2, 3 (11), 173–182.
Paiva, C.C., Araújo, M.E., Caires, R.A., Salles, R.A., Medeiros, R.S. & Lotufo, T.M. (2011). Six new records of deep-sea fish off north-eastern Brazil. Marine Biodiversity Records, 4, E9.
https://doi.org/10.1017/S1755267210001247
Parin, N.V., Kukuev, E.I. & Pakhorukov, N.P. (2010) Species composition, distribution, and behavior of Fish on the Vavilov Underwater Ridge (the Atlantic Ocean). Journal of Ichthyology, 50 (1), 12–19. [translated from Voprosy Ikhtiologii, 2010, 50 (1), 16–23]
https://doi.org/10.1134/S0032945210010029
Regan, C.T. (1912) The osteology and classification of the teleostean fishes of the order Apodes. Annals and Magazine of Natural History, Series 8, 10 (58), 377–387.
https://doi.org/10.1080/00222931208693250
Robertson, D.R. & Allen, G.R. (2015) Shorefishes of the Tropical Eastern Pacific: online information system. Version 2.0. Smithsonian Tropical Research Institute, Balboa, Panamá. [program]
Robins, C.H. & Robins, C.R. (1976) New genera and species of dysommine and synaphobranchine eels (Synaphobranchidae) with an analysis of the Dysomminae. Proceedings of the Academy of Natural Sciences of Philadelphia, 127, 249–280.
Schindelin, J., Arganda-Carreras, I., Frise, E., Kaynig, V., Longair, M., Pietzsch, T., Preibisch, Rueden, C., Saalfeld, S., Schmid, B., Tinevez, J.-Y., White, D.J., Hartenstein, V., Eliceiri, K., Tomancak, P. & Cardona, A. (2012) Fiji: an open-source platform for biological-image analysis. Nature Methods, 9 (7), 676–682.
https://doi.org/10.1038/nmeth.2019
Sabaj, M.H. (2020) Codes for Natural History Collections in Ichthyology and Herpetology. Copeia, 108 (3), 593–669.
https://doi.org/10.1643/ASIHCODONS2020
Santini, F., Kong, X., Sorenson, L., Carnevale, G., Mehta, R.S. & Alfaro, M.E. (2013) A multi-locus molecular timescale for the origin and diversification of eels (Order: Anguilliformes). Molecular Phylogenetics and Evolution, 69, 884–894.
https://doi.org/10.1016/j.ympev.2013.06.016
Smith, D.G. (1984a) A redescription of the rare eel Myroconger compressus (Pisces: Myrocongridae), with notes on its osteology, relationships, and distribution. Copeia, 1984 (3), 585–594.
https://doi.org/10.2307/1445138
Smith, D.G. (1984b). Elopiformes, Notacanthiformes, and Anguilliformes: relationships. In: Moser, H.G., Richards, W.J., Cohen, D.M., Fahay, M.P., Kendall, A.W. Jr. & Richardson, S.L. (Eds.), Ontogeny and systematics of fishes based on an International Symposium dedicated to the memory of Elbert Halvor Ahlstrom Special Publication No. 1. American Society of Ichthyologists and Herpetologists, New York, pp. 94–102.
Smith, D.G. (1989) Family Myrocongridae. In: Böhlke, E.B. (Ed.), Fishes of the Western North Atlantic. Memoir Sears Foundation for Marine Research, 1 (9), 98–103.
https://doi.org/10.2307/j.ctvbcd0dm.10
Tang, K.L. & Fielitz, C. (2012) Phylogeny of moray eels (Anguilliformes: Muraenidae), with a revised classification of true eels (Teleostei: Elopomorpha: Anguilliformes). Mitochondrial D.N.A., 24 (1), 55–66.
https://doi.org/10.3109/19401736.2012.710226
Vieira, R.P., Coelho, R., Denda, A., Martin, B., Gonçalves, J.M.S. & Christiansen, B. (2016) Deep-sea fishes from Senghor Seamount and the adjacent abyssal plain (Eastern Central Atlantic). Marine Biodiversity, 48 (2), 963–975.
https://doi.org/10.1007/s12526-016-0548-4