Laimosemion paryagi (Cyprinodontiformes: Aplocheiloidei: Rivulidae), a new species from the upper Mazaruni river drainage of Western Guyana
F. B. M. Vermeulen, W. H. Suijker and G. E. Collier
aqua, International Journal of Ichthyology, pp. 181-190, Volume 18, Issue 4 – 15 October 2012
Laimosemion paryagi, new species, is described from the upper Mazaruni river system, a tributary of the Essequibo River. It is a member of the Laimosemion breviceps group former known as the Rivulus breviceps group, and shares a robust body and deep caudal peduncle with Laimosemion breviceps (Eigenmann, 1909) and Laimosemion lyricauda (Thomerson et al., 1991) and to a lesser degree with L. gransabanae (Lasso et al., 1992) and Laimosemion torrenticola (Vermeulen & Isbrücker, 2000). These species are all endemic to the Guiana Highlands in western Guyana and the neighbouring Gran Sabana in Eastern Venezuela. It is distinguished from other species in the L. breviceps group by morphology and its remarkable male color pattern of red blotches on a turquoise ground color on the flanks and in the unpaired fins and having a rounded caudal fin as opposed to one having extension or being spade shaped. Analysis of mitochondrial DNA sequence reveals that it is genetically distinct from all other members of this group and that inhabitants of the Guyana highlands diverged from each other early in the history of the genus, commensurate with the geological age of the Guiana Shield.
COSTA, W. J. E. M. 2006. Relationships and taxonomy of the killifish genus Rivulus (Cyprinodontiformes: Aplocheiloidei: Rivulidae) from the Brazilian Amazonas river basin, with notes on historical ecology. aqua, Journal of Ichthyology and Aquatic Biology 11 (4): 133-175.
COSTA, W. J. E. M. 2011. Phylogenetic position and taxonomic status of Anablepsoides, Atlantirivulus, Cynodonichthys, Laimosemion and Melanorivulus (Cyprinodontiformes: Rivulidae). Ichthyol. Explor. Freshwaters, Vol. 22, No. 3, pp. 233-249, 1 fig., 1 tab.,
EIGENMANN, C. H. 1909. Some new genera and species of fishes from British Guiana. Annals of the Carnegie Museum, vol. VI (1): 48-51.
EIGENMANN, C. H. 1912. ‘The freshwater fishes of British Guiana, including a study of the ecological grouping of the species, and the relation of the fauna of the plateau to that of the lowlands.’ Mem. Carnegie Mus., V, pp. 1-578, 103 pls.
HOEDEMAN, J. J. 1958. Studies on Cyprinodontiform Fishes . The frontal scalation pattern in some groups of tooth carps (Pisces, Cyprinodontiformes). Bulletin of Aquatic Biology, 1 (3): 23-28.
HOEDEMAN, J. J. 1961. Studies on Cyprinodontiform Fishes : Preliminary key to the species and subspecies of the genus Rivulus. Bulletin of Aquatic Biology 2 (18): 65-74.
HRBEK, T. & LARSON, A. 1999. The evolution of diapause in the killifish family Rivulidae (Antherinomorpha, Cyprinodontiformes): A molecular phylogenetic and biogeographic perspective. Evolution 53, 1200-1216.
HRBEK, T., PEREIRA DE DEUS, C. & PIRES FARIAS, I. 2004. Rivulus duckensis (Teleostei; Cyprinodontiformes): new species from the Tarumã Basin of Manaus, Amazonas, Brazil, and its relationship to other neotropical Rivulidae. Copeia 2004 (3), 569-576.
HUBER, J. H. 1992. Review of Rivulus, Ecobiogeography Relationships Cybium, Societe francais d’Ichthyologie, 572 pp.
HUBER, J. H. 1999. Updates to the phylogeny and systematics of the Neotropical cyprinodont genus Rivulus and its allied (Cyprinodontiformes: Rivulinae). Cybium, 23: 29-52.
KLIGERMAN, A. & BLOOM S. 1977. Rapid chromosome preparations from solid tissues of fishes. Journal of the Fisheries Research Board of Canada, 34, 266-269.
LASSO, C., TAPHORN, D. & THOMERSON, J. 1992. Rivulus gransabanae, a new species of killifishes from Venezuela (Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters 2 (4): 289-296.
LASSO-ALCALA, O. M., TAPHORN, D. C., LASSO, C. A. & LEON-MATA, O. 2006. Rivulus sape, a new species of killifish (Cyprinodontiformes: Rivulidae) from the Paragua River system, Caroní River drainage, Guyana Shield, Venezuela. Zootaxa 1275: 21-29.
MURPHY, W. J. & COLLIER, G .E. 1996. Phylogenetic relationships within the aplocheiloid fish genus Rivulus (Cyprinodontiformes, Rivulidae): Implications for Caribbean and Central American biogeography. Molecular Biology and Evolution 13: 642-649.
MURPHY, W. J. & COLLIER, G. E. 1997. A molecular phylogeny for aplocheiloid fishes (Atherinomorpha, Cyprinodontiformes): The role of vicariance and the origins of annualism. Molecular Biology and Evolution 14: 790-799.
MURPHY, W. J., THOMERSON, J. E. & COLLIER, G. E. 1999. Phylogeny of the neotropical killifish family Rivulidae (Cyprinodontiformes, Aplocheiloidei) inferred from mitochondrial DNA sequences. Molecular Phylogenetics and Evolution 13: 289-301.
SUIJKER, W. H. & COLLIER, G. E. 2006. Rivulus mahdiaensis, a new killifish from central Guyana, (Cyprinodontiformes: Rivulidae). Zootaxa 1246: 1-13.
TAMURA K, DUDLEY J, NEI M. & KUMAR, S. 2007. MEGA4: Molecular Evolutionary Genetics Analysis (MEGA) software version 4.0. Molecular Biology and Evolution 24: 1596-1599.
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
THOMERSON J. E., BERKENKAMP, H. O. & TAPHORN, D. 1991. Rivulus lyricauda, a new species from the Guyana shield in Eastern Venezuela (Cyprinodontiformes, Rivulidae) Ichthyol. Explor. Freshwaters, 1 (4): 289-294, 4 fig., 1 tab.
VERMEULEN F. B. M. & ISBRÜCKER, I. J. H. 2000. Rivulus torrenticola n. sp. (Actinopterygii: Cyprinodontiformes: Rivulidae), a new killifish from highlands in the Guyana Shield. Beaufortia, Bul. Zool. Mus. University of Amsterdam, Vol. 50, No. 10
VERMEULEN, F. B. M. & HRBEK, T. 2005. Kryptolebias sepia n. sp. (Actinopterygii: Cyprinodontiformes: Rivulidae), a new killifish from the Tapanahoni River drainage in southeast Surinam. Zootaxa, 928: 1-20.