Abstract
Moema humaita, new species, is described from a seasonal pool in the rio Madeira drainage, Amazon River basin, Brazil. The new species is assigned to the Moema staecki species group based on the color pattern in males, composed of dots following interrupted lines arranged horizontally. Moema humaita differs from all known congeners by its unique color pattern in males, presenting body sides light grey, with three horizontal lines, composed by small red dots lying in the center of each scale, alternating with three bright yellow lines, and additionally by presenting caudal fin with 3–4 long filamentous rays and presenting an anal fin long, with its tip pointed, reaching vertical through near the end of the caudal fin, orange in color. The occurrence of an undescribed species of the genus Moema in Guyana is reported based on a photograph of an unpreserved specimen.
References
- Costa, W.J.E.M. (1989) Descrição e relações filogenéticas de dois gêneros novos e três espécies novas de peixes anuais neotropicais (Cyprinodontiformes, Rivulidae). Revista Brasileira de Biologia, 49 (1), 221–230.
- Costa, W.J.E.M. (1995) Pearl killifishes: The Cynolebiatinae. Systematics and Biogeography of a Neotropical annual fish subfamily (Cyprinodontiformes: Rivulidae). TFH Publications, Neptune City, 128 pp.
- Costa, W.J.E.M. (2003a) Three new annual fishes of the genus Aphyolebias Costa, 1998 (Cyprinodontiformes: Rivulidae) from Bolivian and Peruvian Amazon. Comunicações do Museu de Ciências e Tecnolologia da PUCRS, Série Zoologia, 16 (2), 155–166.
- Costa, W.J.E.M. (2003b) Moema heterostigma, a new annual fish (Cyprinodontiformes: Rivulidae) from the Brazilian Pantanal, Rio Paraguay basin. Ichthyological Exploration of Freshwaters, 14 (4), 289–294.
- Costa, W.J.E.M. (2003c) Two new annual fishes of the genus Moema Costa, 1989, from the Peruvian Amazon (Teleostei, Cyprinodontiformes, Rivulidae). Boletim do Museu Nacional, Série Zoologia, 513, 1–10.
- Costa, W.J.E.M. (2006) The South American annual killifish genus Austrolebias (Teleostei: Cyprinodontiformes: Rivulidae): phylogenetic relationships, descriptive morphology and taxonomic revision. Zootaxa, 1213 (1), 1–162. https://doi.org/10.11646/zootaxa.1213.1.1
- Costa, W.J.E.M. (2007) Taxonomy of the plesiolebiasine killifish genera Pituna, Plesiolebias and Maratecoara (Teleostei: Cyprinodontifomes: Rivulidae), with descriptions of nine new species. Zootaxa, 1410 (1), 1–41. https://doi.org/10.11646/zootaxa.1410.1.1
- Costa, W.J.E.M. (2014) Phylogeny and evolutionary radiation in seasonal rachovine killifishes: biogeographical and taxonomical implications. Vertebrate Zoology, 64 (2), 177–192. https://doi.org/10.3897/vz.64.e31478
- Drawert, H.A. (2022) A new species of the seasonal killifish genus Moema (Cyprinodontiformes: Rivulidae) from the Piraí watershed in the Southwest Amazon basin. Neotropical Ichthyology, 20 (4), e220067, 1–17. https://doi.org/10.1590/1982-0224-2022-0067
- Drawert, H.A. (2023) Rivúlidos (Rivulidae: Cyprinodontiformes) de Bolivia: estado de conhecimento e inventario atualizado. Neotropical Hydrobiology and Aquatic Conservation, 4 (2), 3–85. https://doi.org/10.55565/nhac.zlmk9566
- Hoedeman, J.J. (1958) The frontal scalation pattern in some groups of tooth carps. Bulletin of Aquatic Biology, 1, 23–28.
- Hrbek, T. (2013) Rivulidae. In: Queiroz, L.J., Torrente-Vilara, G., Ohara, W.M., Pires, T.H.S., Zuanon, J. & Doria, C.R.C. (Eds.), Peixes do rio Madeira. Vol. III. A ictiofauna do rio Madeira. Dialeto, São Paulo, pp. 290–299.
- Huber, J.H. (2003) A new species of annual killifish from southeastern Peru, with a uniquely barred color pattern, Moema quiii n.sp. Freshwater and Marine Aquarium, 26 (12), 10–12 + 14 + 16 + 18–19.
- Loureiro, M., de Sá, R., Serra, S.W., Alonso, F., Lanés, L.E.K., Volcan, M.V., Calviño, P., Nielsen, D., Duarte, A. & Garcia, G. (2018) Review of the family Rivulidae (Cyprinodontiformes, Aplocheiloidei) and a molecular and morphological phylogeny of the annual fish genus Austrolebias Costa 1998. Neotropical Ichthyology, 16 (3), e180007. [1–20] https://doi.org/10.1590/1982-0224-20180007
- Nielsen, D.T.B. (2008) Simpsonichthys e Nematolebias. Cabral Editora e Livraria Universitária, Taubaté, 235 pp.
- Nielsen, D.T.B. (2016) Description of two new species of Anablepsoides (Cyprinodontiformes: Cynolebiidae) from Rio Madeira, Amazon drainage, Rondônia state and from Rio Itapecurú basin, Maranhão state, Brazil. aqua, International Journal of Ichthyology, 22 (4), 165–176.
- Sabaj, M.H. (2020) Codes for natural history collections in ichthyology and herpetology. Copeia, 108, 593–669. https://doi.org/10.1643/ASIHCODONS2020
- Taylor, W.R. & Van Dyke, G.C. (1985) Revised procedures for staining and clearing small fishes and other vertebrates for bone and cartilage study. Cybium, 9, 107–109.
- Valdesalici, S. (2015) Moema kenwoodi: a new annual killifish from the Madre de Dios River drainage, Peruvian Amazon (Teleostei: Rivulidae). Journal of the American Killifish Association, 48 (3), 66–72.
- Valdesalici, S. (2019) A new annual killifish: Moema funkneri (Cyprinodontiformes: Rivulidae) from the Bolivian Amazon. aqua, International Journal of Ichthyology, 25 (3), 103–110.
- Valdesalici, S. (2023) A new annual killifish, Moema beltramonorum, (Cyprinodontiformes: Rivulidae) from the Amazon basin, Bolivia. Zootaxa, 5383 (4), 594–600. https://doi.org/10.11646/zootaxa.5383.4.10
- Valdesalici, S., Nielsen, D.T.B. & Pillet, D. (2015) Moema beucheyi (Teleostei: Cyprinodontiformes: Rivulidae), a new annual killifish from the Río Madeira basin, Bolivian Amazon. aqua, International Journal of Ichthyology, 21 (3), 128–135.